MXPA00000731A

MXPA00000731A - Inhibition of pulp and paper yellowing using nitroxides and other coadditives

Info

Publication number: MXPA00000731A
Application number: MXPA/A/2000/000731A
Authority: MX
Inventors: Raymond Seltzer; Jeanpierre Wolf; Cyril Heitner; John Alois Schmidt; Peter Francis Mcgarry; Glen Thomas Cunkle; Randall Bruce Nelson
Original assignee: Ciba Specialty Chemicals Holding Inc
Priority date: 1997-07-23
Filing date: 2000-01-21
Publication date: 2001-05-17

Abstract

Pulps or papers, especially chemimechanical or thermomechanical pulps or papers, which still contain lignin, have enhanced resistance to yellowing when they contain an effective stabilizing amount of a hindered amine compound which preferably is a nitroxide, a hydroxylamine or an ammonium salt thereof. This performance is often further enhanced by the presence of one or more coadditives selected from the group consisting of the UV absorbers, the polymeric inhibitors, the nitrones, the fluorescent whitening agents, metal chelating agents, sulfur containing stabilizers, metal salts and diene compounds. Combinations of nitroxides, hydroxylamines or their salts, benzotriazole or benzophenone UV absorbers and a metal chelating agent are particularly effective. Selected derivatives of 1-oxyl-2,2,6,6-tetramethylpiperidin-4-ol and selected hydroxylamine salts are novel compounds and are surprisingly effective for this purpose.

Description

INHIBITION OF THE YELLOW ION OF PULP AND PAPER USING NITROXIDES AND OTHER COADITIVES The present invention relates to a method for preventing the loss of brightness and for improving resistance to yellowing in pulp or paper that still contains lignin by the addition of nitrogen oxides, hydroxylamines or other salts and other coadditives. The present invention also pertains to novel compounds which are selected from 1-oxyl-2, 2, 6,6-tetramethyl-piperidin-4-ol derivatives or which are their hydroxylamine salts.

BACKGROUND OF THE INVENTION High performance and ultra high performance wood pulps undergo rapid light-induced discoloration, particularly when exposed to near ultraviolet light (wavelengths 300-400 nm) in indoor fluorescent light and the day light. This feature restricts its use to low value, short life paper products. The wood pulps of high performance and ultra high performance can be bleached at a higher level of whiteness. If this whiteness could be stabilized against fading, those bleached high-yield pulps could displace significant amounts of low-yield, fully bleached, more expensive chemical pulps. This discoloration is attributed to the substantial lignin content of high yield pulps totaling approximately 20-45% by mass. Phenoxy radicals are the key intermediates in the reaction mechanism. Several reactions induced by light that contribute to its formation have been proposed, such as the abstraction of a hydrogen atom from the phenolic groups, cleavage of the aryl ether bond of the phenacyl aryl ether groups, or the breaking down of ethyl radicals formed from structures of aryl-glycerol ß-aryl ether saturated in lignin. Phenoxy radicals are oxidized by other oxygen-centered radicals (alkoxy, peroxy, hydroxy, and perhydroxy) to form yellow chromophores. (C. Heitner in "Photochemistry of Lignocellulosic Materials", C. Heitner, J.C. Scaiano, eds ,: ACS Sy. Ser. 531, 1-25 (1993)). I.E. Arakin et al., Khymiya drevesiny (Chemistry of Wood), 1982, No. 2, 114 and A.D. Sergeev et al., Ibid, 1984, No. 5, 20 disclose that the use of iminoxyl radicals such as TEMPO (l-oxyl-2, 2,6,6-tetramethylpiperidine) are useful in the delignification of wood using the process of oxygen-soda (alkaline) of a stage, but no mention is made or suggestion of any activity provided by the TEMPO on the prevention of the discoloration induced by the light of the paper or pulp made of such treated wood. EP 717,143 and WO / 36041 disclose a multi-component system for changing, reducing or bleaching lignin and lignin-containing materials, which comprises an oxidation catalyst, and an N-hydroxyl-mediating compound, such as the N- hydroxyphthalimide or dialkylhydroxylamine. These references are directed to the delignification of wood. No mention or suggestion of any activity provided by the N-hydroxyl compounds is made in the prevention of discoloration induced by the light of the paper or pulp made of such treated wood. SAW. Khodyrev et al., Vysokomol soyed A29, No. 3,616 (1987) [Polymer Sci. U.S.S.R,. 29, No. 3, 688 (1987)] show that oxidation photoinitiated by oxygen causes the weathering of cellulosic textiles such as linen or cotton. ÜV absorbers offer no protection, and are actually harmful. The authors noted that the stable nitroxyl radical 1-oxyl-2, 2,6,6-tetra-methyl-4-hydroxypiperidine interacts with the alkyl radicals in the cellulose to give its healthy stabilizing activity. There are no suggestions on the part of the authors that this stabilizing activity could be applied successfully in pulp and / or paper made from it that contains lignin. M-K Syker et al., J. Assn. Pulp Tech Paper, 29, 135 (1990) show that selected metal salts such as magnesium sulfate and lower alkanoic acids inhibit color reversal in bleached pulp. P. Fornier de Violet et al., Cellulose Chem. Tech., 24, 225 (1990) show that the use of ÜV absorbent and hydrogen agents such as thiols, ascorbic acid, etc., help to prevent photoinduced discoloration of wood pulp bleached with hydrogen peroxide, but chain destroyers such as hindered phenols and hindered amines (which have portions >; N-H or > N-CH2-) did not or did not have a harmful effect on the prevention of photoinduced discoloration. R. Agnemo et al., Holzforshung (1991), _4_5 (Suppl), 101, confirmed that free hydroxyl radicals plus lignin lead to undesirable photoamarillation in pulp and paper. S. Omori et al., J. Assn. Paper Pulo Tech., 48, 1388 (1993) describes the effect of antioxidants and UV absorbers on the reversion of light and concludes that the combination of an oxidant and UV absorber prevents color reversion and has a synergistic effect on that activity.

M. Paulsson et al., Nordic Pulp Pap. Res. J., (1995), 1_0, (1), 62-67, show that efficient photostability of unbleached paper or pulp of TMP bleached with hydrogen peroxide can be achieved by acetylation. There have been a number of different methods proposed to inhibit the yellowing of mechanical pulps. These include: radical scavengers and antioxidants; UV protectors; elimination of chromophores after their formation; chemical modification of lignin by alkylation or acetylation; polymeric inhibitors; and two types of co-additives used in combination. Z-H. Wu et al., Holzforshchung, 4_8, (1994), 400 discusses the use of radical scavengers such as phenyl-N-tert-butylnitrone to reduce the formation of chromophores during mechanical pulp formation and give a more stable pulp to the light. C. Heitner, "Chemistry of the Reversal of Brilliance and its Control, Chapter 5", in Pulp Bleaching-Principles and Practice, C. Dence, D. Reeve, eds., TAPPI Press, Atlanta. 1996, pp 183-211, summarizes the state of the art in the thermal and light-induced yellowing of lignin-containing pulps such as thermomechanical (TMP) and chemithermomechanical pulps (CTMP), showing the seriousness of these undesirable effects, argues In general, the technique and current methods used to attack this problem. These include bleaching, the use of phosphites, UV absorbers, polyalkylene glycols and free radical scavengers such as ascorbic acid, thiols, thioethers, aliphatic dienes and aldehydes and chelating agents such as ethylenediaminetetraacetic acid (EDTA). The author concluded that, although there has been much progress, there is still much to be done before a successful and practical solution of this loss of brilliance and undesirable yellowing found in the paper and / or pulp containing lignin. The present invention described in detail below provides such a solution where it is observed that the use of selected hindered amine nitroxides, hindered amine hydroxylamines or their salts in combination with selected UV absorbers and metal chelating agents, prevents the loss of brightness and improves resistance to yellowing in pulp or paper that still contains lignin.

Detailed Description of the Invention The addition of free radicals of hydroxylamines or nitroxide to high performance paper pulp alone or in combination with UV absorbers, metal chelating agents, fluorescent whitening agents and / or stabilizing polymers, effectively achieves luminous stability and thermal that is similar to that found in papers made of kraft pulp. It is known that hydroxylamines and nitroxides are efficient free radical scavengers and can limit the production of o-quinones; UV absorbers limit photochemistry in the underlying substrate to which they are applied, and ultimately reduce the production of free radicals. The UV absorbers and nitroxides are each effective in containing some of the free radical chemicals that lead to yellowing of the paper when used alone. However, when used together, hydroxylamines or nitroxides and ÜV absorbers can effectively arrest photochemical yellowing of lignin-containing papers, which were exposed 24 hours a day under ambient fluorescent light conditions for at least 200 days. Both of these types of stabilizers exhibit improved inhibitory activity when combined with a metal chelating agent such as diethylenetriaminepentaacetic acid, or polymeric inhibitors such as polyethylene glycol. More particularly, the present invention pertains to a composition having reduced brightness loss and increased resistance to yellowing, which comprises (a) a pulp or paper that still contains lignin, and (b) an effective stabilizing amount of a compound of hindered amine of formula I or II (i) (ll) where Gi and G2 are independently alkyl of 1 to 4 carbon atoms or together are pentamethylene, Zi and Z2 are each methyl, or Zi and Z2 together form a linking portion, which may be further substituted by an ester, ether, hydroxy, oxo, cyanohydrin, amide, amino, carboxy or urethane group, E is oxyl; hydroxyl; hydrogen; I rent; alkyl substituted by hydroxyl, oxo or carboxy or interrupted by oxygen or carboxy; alkenyl; alkynyl; cycloalkyl; cycloalkenyl; bicycloalkyl; alkoxy; alkoxy substituted by hydroxyl, oxo or carboxy or interrupted by oxygen or carboxy; cycloalkoxy; alkenyloxy; cycloalkenyloxy, aralkyl; aralkoxy; acyl; R '(C = 0) 0-; R'0 (C = 0) 0-; R'N (C = 0) 0- or chloro, where R 'is an aliphatic or aromatic portion, X is an inorganic or organic anion, and where the total charge of cations h equals the total charge of anions j, and with the proviso that the compound of formula I is not bis (2, 2,6,6-tetramethylpiperidin-4-yl) sebacate or the product of the polycondensation of 1- (2-hydroxyethyl) -2, 2, 6, 6-tetramethyl-4-hydroxypiperidine and succinic acid. Preferably, the compositions are those wherein in the compound of component (b), E is oxy, hydroxyl, alkenyloxy, aralkoxy, alkyloxy or alkyl substituted by oxo or interrupted by carboxy, more preferably where E is oxy, hydroxy or alkenyloxy, especially where E is oxy or hydroxy; more especially where E is hydroxy. The specific meanings of E are conveniently as given above for formulas A to EE and A * to EE *, such as those within the definitions given above for E. Examples for X include X as phosphate, carbonate, bicarbonate, nitrate, chlorine, bromine, bisulfite, sulfite, bisulfate, sulfate, borate, carboxylate, an alkylsulphonate or an aryl sulfonate, or a phosphonate, similar, for example, diethylenetriaminepentamethylenephosphonate. X as carboxylate is especially a carboxylate of a mono-, di-, tri- or tetracarboxylic acid, mainly of 1-18 carbon atoms, such as a formate, acetate, benzoate, citrate, oxalate, tartrate, acrylate, polyacrylate, fumarate , maleate, itaconate, glycolate, gluconate, malate, mandelate, tiglato, ascorbate, polymethacrylate, or nitrilotriacetic acid, hydroxyethylethylenediaminetriacetic acid, ethylenediaminetetraacetic acid or diethylenetriaminepentaacetic acid. More preferably, X is chloro, bisulfite, bisulfate, sulfate, phosphate, nitrate, ascorbate, acetate, citrate or carboxylate of ethylenediaminetetraacetic acid or diethylenetriaminepentaacetic acid; more especially where X is bisulfate or citrate. # h and j are preferably in the range of 1-5. Preferably, Zi and Z2 as a linking moiety are a chain of 2 or 3 carbon atoms or 1 or 2 carbon atoms and a nitrogen or oxygen atom, forming together with the remaining structure in formula I or II a ring 5 or 6 membered heterocyclic saturated, which may be substituted as mentioned. The substituents on Zi and Z2 by themselves may contain portions of hindered amine. Preferred compounds are of formula I or II containing 1-4, especially 1 or 2 portions of hindered amine or hindered ammonium. Preferably, Zx and Z2 as a linking moiety is a hydrocarbon containing 1-200, especially 1-60 carbon atoms and 0-60, especially 0-30 heteroatoms selected from oxygen atoms and nitrogen atoms. Any group denoted as aryl means mainly C6-C aryl? , preferably phenyl or naphthyl, especially phenyl. The compounds of component (b) of the invention can be pure compounds or mixtures. The groups denoted as alkyl are, within the given definitions, primarily C 1 -C 8 alkyl, for example methyl, ethyl, propyl such as n- or isopropyl, butyl such as n-, iso-, sec- and ter. -butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl or octadecyl. The groups denoted as alkylene are, within the given definitions, for example methylene, 1,2-ethylene, 1,1-ethylene, 1,3-propylene, 1,2-propylene, 1,1-propylene, 2, 2 -propylene, 1,4-butylene, 1,3-butylene, 1,2-butylene, 1,1-butylene, 2,2-butylene, 2,3-butylene, or -C5H10-, -C6H12-, C7H ? 4, -CsHi6-, -C9H18-, -C10H20- ~ C ?? H22-, -C? 2H2-, -C13H26- / -C14H28-, -C15H30-, -Ci6H32-, -Ci7H34-, -C18H36- . The groups denoted as cycloalkyl or cycloalkoxy are mainly C5-C12 cycloalkyl or Cs-C? 2 cycloalkoxy, the cycloalkyl is in part, for example, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl or cyclododecyl. Cycloalkenyl is mainly C5-C12 cycloalkenyl, including cyclopentenyl, cyclohexenyl, cycloheptenyl, cyclooctenyl, cyclononenyl, cyclodecenyl, cyclodedecenyl, cyclododecenyl. The aralkyl or aralkoxy is preferably phenylalkyl or phenylalkoxy, which is alkyl or alkoxy substituted by phenyl. Examples for phenylalkyl or phenylalkoxy are, within the given definitions, benzyl, benzyloxy, α-methylbenzyl, α-methylbenzyloxy, cumyl, cumyloxy. The alkenyl residues, as in the definition of E or other definitions, are primarily alkenyl of 2 to 18 carbon atoms, most preferably allyl. Alkynyl residues, as in the definition of E or other definitions, are primarily alkynyl of 2 to 12 carbon atoms, propargyl is preferred. A group denoted as acyl is primarily R (C = 0) -, where R is an aliphatic or aromatic moiety. An aliphatic or aromatic portion, such as that mentioned above or in the definition of E or other definitions, is primarily an aliphatic or aromatic hydrocarbon of C? -C30; examples are aryl, alkyl, cycloalkyl, alkenyl, cycloalkenyl, bicycloalkyl, bicycloalkenyl, and combinations of those groups. The examples for acyl groups are alkanoyl of 2 to 12 carbon atoms, alkenoyl of 3 to 12 carbon atoms, benzoyl. The alkanoyl embraces, for example, formyl, acetyl, propionyl, butyryl, pentanoyl, octanoyl; the C2-C8 alkanoyl is the preferred, especially acetyl. Alkenoyl residues are more preferably acryloyl or methacryloyl. The alkyl groups in the different substituents can be linear or branched. Examples for alkyl of 1 to 6 carbon atoms are methyl ethyl propyl and its isomers, butyl and its isomers, pentyl and its isomers and hexyl and its isomers. Examples for alkenyl groups with 2 to 4 carbon atoms are ethenyl, propenyl, butenyl. Examples for alkyl groups with 1 to 4 carbon atoms interrupted by one or two oxygen atoms are -CH2-0-CH3, -CH2-CH2-0-CH3, -CH2-CH2-0-CH2-CH3, -CH2 -0-CH2-CH2-0-CH3 or -CH2-0-CH2-0-CH3. Examples for alkyl groups substituted with hydroxy having 2 to 6 carbon atoms are hydroxy ethyl, dihydroxy ethyl, hydroxy propyl, di-hydroxy propyl, hydroxy butyl, hydroxy pentyl or hydroxy hexyl.

A preferred composition contains a compound of component (b), wherein E is hydroxyl, alkenyloxy, aralkoxy, alkyloxy substituted by oxo or interrupted by carboxy and X is chloro, bisulfate, sulfate, formate, acetate, benzoate, oxalate, citrate, a carboxylate of ethylenediaminetetraacetic acid or diethylenetriaminepentaacetic acid or polyacrylate. Also preferred is a composition wherein in the compound of component (b), E is hydroxyl or alkenyloxy and X is chloro, bisulfate, sulfate, citrate or a carboxylate of ethylenediaminetetraacetic acid or diethylenetriaminepentaacetic acid. More preferred is a composition wherein in the compound of component (b), E is hydroxyl and X "is citrate Preferably, the hindered amine compounds of component (b) are those of formulas A to EE and A * A EE * where E is oxyl, hydroxyl, hydrogen, alkyl of 1 to 18 carbon atoms, alkyl of 2 to 12 carbon atoms substituted by one to three hydroxyl or such alkyl interrupted by one to four oxygen atoms, or both alkyls substituted by such hydroxyl groups and interrupted by such oxygen atoms, alkenyl of 2 to 18 carbon atoms, alkynyl of 2 to 12 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, cycloalkenyl of 5 to 12 carbon atoms, bicycloalkyl of 6 a 10 carbon atoms, alkoxy of 1 to 18 carbon atoms, alkoxy of 2 to 12 carbon atoms substituted by one to three hydroxyl groups or such alkoxy interrupted by one to four oxygen atoms or such alkoxy substituted by -COOZ where Z is hydrogen or alkyl of 1 to 4 carbon atoms, cycloalkoxy of 5 to 12 carbon atoms, cycloalkenyloxy of 5 to 12 carbon atoms, alkenyloxy of 2 to 18 carbon atoms, aralkyl of 7 to 15 carbon atoms, aralkoxy of 7 to 15 atom s of carbon, alkanoyl of 2 to 12 carbon atoms, alkenoyl of 3 to 12 carbon atoms, benzoyl, or R '(C = 0) 0-, R'0 (C = 0) 0-, R'N (C = 0) 0-, where R 'is alkyl of 1 to 6 carbon atoms or phenyl, R is hydrogen or methyl, in the formula A and A *, n is 1 or 2, when n is 1, Ri is hydrogen, alkyl of 1 to 18 carbon atoms, alkenyl of 2-18 carbon atoms, propargyl, glycidyl, alkyl of 2 to 50 carbon atoms interrupted by one to twenty oxygen atoms, such alkyl substituted by one to ten hydroxyl groups or both interrupted by such an oxygen atom and substituted by such hydroxyl groups, or Ri is alkyl of 1 to 4 carbon atoms substituted by a carboxy group or by -C00Z where Z is hydrogen, alkyl of 1 to 4 carbon atoms or phenyl , or where Z is such alkyl substituted by -. { COO) "nMn + where n is 1-3 and M is a metal ion of the ler, 2nd or 3rd group of the periodic table or is Zn, Cu, Ni or Co, or M is a group Nn + (R2) 4 where R2 is alkyl of 1 to 8 carbon atoms or benzyl, when n is 2, Ri is alkylene of 1 to 12 carbon atoms, alkenylene of 4 to 12 carbon atoms, xylylene or alkylene of 1 to 50 carbon atoms interrupted by one to twenty oxygen atoms, substituted by one to ten hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, in formula B and B *, m is 1 to 4, when m is 1, R is alkyl of 1 to 18 carbon atoms, alkyl of 3 to 18 carbon atoms interrupted by -COO-, alkyl of 3 to 18 carbon atoms substituted by COOH or COO-, or R2 is -CH2 ££) CH2CH2) pOCH3 where n is 1 to 12, or R2 is cycloalkyl of 5 to 12 carbon atoms, aryl of 6 to 12 carbon atoms, or such aryl substituted by one to four alkyl groups of 1 to 4 carbon atoms, R2 is -NHR3 where R3 is alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aryl of 6 to 12 carbon atoms, or such aryl substituted by one to four alkyls of 1 to 4 carbon atoms , or R2. is -N (R3) 2 where R3 is as defined above, when m is 2, R2 is alkylene of 1 to 12 carbon atoms, alkenylene of 4 to 12 carbon atoms, xylylene, alkylene of 2 to 12 carbon atoms interrupted by -COO-, alkylene of 3 to 18 carbon atoms substituted by COOH or COO-, or R2 is -CH2 (OCH2CH2) nOCH2- where n is 1 to 12, or R 2 is cycloalkylene of 5 to 12 carbon atoms, aralkylene of 7 to 15 carbon atoms or arylene of 6 to 12 carbon atoms, or R 2 is -NHR 4 NH- where R 4 is alkylene of 2 to 18 carbon atoms, cycloalkylene of 5 to 12 carbon atoms, aralkylene of 8 to 15 carbon atoms or arylene of 6 to 12 carbon atoms, or R2 is -N (R3) R4N (R3) - where R3 and R4 are as defined above, or R2 is -CO- or -NH-CO-NH-, when m is 3, R 2 is C 3 to C 8 alkanol or benzentriyl, or when m is 4, R 2 is C 5 -C 8 alkyntetranyl or bencentetrayl, Formula C and C *, Rio is hydrogen, alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, alkanoyl of 2 to 18 carbon atoms, 3 to 5 carbon atoms or benzoyl uenoyl, x is 1 or 2, when x is 1, Ru is hydrogen, alkyl of 1 to 18 carbon atoms, alkenyl of 2 to 18 carbon atoms, propargyl, glyoidyl, 2 to 50 carbon atoms interrupted by one to twenty oxygen atoms, such alkyl substituted by one to ten hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or Rii is alkyl of 1 to 4 carbon atoms substituted by a carboxy group or by -COOZ wherein Z is hydrogen, alkyl of 1 to 4 carbon atoms or phenyl, or where Z is such alkyl substituted by - (COO ") nMp + where n is 1-3 and M is an ion metal of the ler, 2nd or 3rd group of the periodic table or is Zn, Cu, Ni or Co, or M is a group Nn * (R2) 4 where R2 is hydrogen, alkyl of 1 to 8 carbon atoms or benzyl, or when x is 2, Rn is alkylene of 1 to 12 carbon atoms, alkenylene of 4 to 12 carbon atoms, xylylene or alkylene of 1 to 50 carbon atoms interrupted by one to twenty oxygen atoms, substituted by one to ten hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, in formulas D and D *, Rio is as defined above, and is 1 to 4, and R? 2 is as defined as R2 above, in the formula E and E *, k is 1 or 2, when k is 1 R2o and R2? are independently alkyl of 1 to 12 carbon atoms, alkenyl of 2 to 12 carbon atoms or aralkyl of 7 to 15 carbon atoms, or R2o is also hydrogen, or R20 and R2? together they are alkylene of 2 to 8 carbon atoms or such alkylene substituted by hydroxyl, or are acyloxy-alkylene of 4 to 22 carbon atoms, or when k is 2 R20 and R21 together are <; -CH2) 2C (CH2-) 2, in formulas F and F *, R3Q is hydrogen, alkyl of 1 to 18 carbon atoms, benzyl, glycidyl, or alkoxyalkyl of 2 to 6 carbon atoms, g is 1 or 2, when g is 1, R31 is as defined as Ri previously when n is 1 when g is 2, R3i is as defined as Ri previously when n is 2, in formulas G and G *, Ei is alkylene of 1 to 3 carbon atoms, or Ei is -CH2-CH (R42) -O- where R42 is hydrogen, methyl or phenyl, or Ex is - '(CH2) 3-NH- or Ex is a direct bond, R40 is hydrogen or alkyl of 1 to 18 carbon atoms, R41 is hydrogen, alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms, or R4i is -CH2-CH (R42) -OH where R42 is as defined above in formulas H and H * p is 1 or 2, T4 is as defined for Rp when x is 1 or 2, M and Y are independently methylene or carbonyl, preferably M is methylene and Y is carbonyl, in formulas I and I *, this formula denotes a recurring structural unit of a polymer where Ti is ethylene or 1,2-propylene or is the repeating structural unit derived from an alpha-olefin copolymer with acrylate of alkyl derived from methacrylate, and where q is 2 to 100, Qi is -N (R4?) - or -O- where R4i is as defined above in formulas J and J * r is 1 or 2, T7 is like was defined for Ri when n is 1 or 2 in formula A, preferably T7 is octamethylene when r is 2, in formulas L and L *, u is 1 or 2, T? 3 is as defined for Rx when n is 1 or 2 in formula A, with the proviso that T13 is not hydrogen when u is 1, in the formulas M and M *, Ei and E2, they are different, each one is -CO- or -N (Es) wherein E5 is hydrogen, alkyl of 1 to 12 carbon atoms or alkoxycarbonylalkyl of 4 to 22 carbon atoms, preferably Ei is -CO- and E2 is -N (E5) -,. E3 is hydrogen, alkyl of 1 to 30 carbon atoms, phenyl, naphthyl, such phenyl or such naphthyl substituted by chloro or by alkyl of 1 to 4 carbon atoms, or phenylalkyl of 7-12 carbon atoms, or such substituted phenylalkyl by alkyl of 1 to 4 carbon atoms, E4 is hydrogen, alkyl of 1 to 30 carbon atoms, phenyl, naphthyl or phenylalkyl of 7 to 12 carbon atoms, or E3 and E together are polymethylene of 4 to 17 carbon atoms , or such polymethylene substituted by one to four alkyls of 1 to 4 carbon atoms, preferably methyl, in the formulas N and N *, R is as defined for Rx in the formula A when n is 1, G3 is a direct bond, alkylene of 1 to 12 carbon atoms, phenylene or -NH-Gi-NH- where Gi is alkylene of 1 to 12 carbon atoms, in the formulas O and O * Rio is as defined for Rio in the formula C, in the formulas P and P *, E6 is a tetravalent aliphatic or aromatic radical, preferably neopentantetra or bencentetrail, in the formulas T and T *, R51 is hydrogen, alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, or aryl of 6 to 10 carbon atoms, R52 is hydrogen or alkyl of 1 to 18 carbon atoms, or R51 and R52 together with alkylene of 4 to 8 carbon atoms, f is 1 or 2, when f is 1, R50 is as defined for Rn in formula C when x is 1, or R50 is - (CH2) 2COORs4, where z is 1 to 4 and Rs4 is hydrogen or alkyl of 1 to 18 carbon atoms, or R54 is a metal ion of the ler, 2nd or 3rd group of the periodic table or a group - N (R55) 4 where R55 is hydrogen, alkyl of 1 to 12 carbon atoms or benzyl, when f is 2, R50 is as defined for Ru in formula C when x is 2, in formulas U and U *, 53r R54 R55 and R56 are independently alkyl of 1 to 4 carbon atoms or together are pentamethylene.

In the formulas V and V *, R57 / R58 R59 and Reo are independently alkyl of 1 to 4 carbon atoms or together are pentamethylene in the formulas W and W *, R61, R62, R64 and R65 are independently alkyl 1 to 4 carbon atoms or together are pentamethylene, Rd5 is alkyl of 1 to 5 carbon atoms, M is hydrogen or oxygen, where in formulas X to CC and X * to CC * n is 2 to 3, Gi is hydrogen , methyl, ethyl, butyl or benzyl, m is 1 to 4, x is 1 to 4, when x is 1, Ri and R2 are independently alkyl of 1 to 18 carbon atoms, such alkyl interrupted by one to five oxygen atoms , such alkyl substituted by 1 to 5 hydroxyl groups or such of both alkyls interrupted by such oxygen atoms and substituted by such hydroxyl groups; cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or such an aryl substituted by one to three alkyl of 1 to 8 carbon atoms, or R1 is also hydrogen, or Ri and R2 together are tetramethylene, pentamethylene, hexamethylene or 3-oxapentamethylene, when x is 2, Ri is hydrogen, alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or such of both alkyls interrupted by one or two oxygen atoms and substituted by a hydroxyl group, R 2 is alkylene of 2 to 18 carbon atoms, such alkylene. interrupted by one to five oxygen atoms, such alkylene substituted by 1 to 5 hydroxyl groups or such alkylene, both interrupted by such oxygen atoms and substituted by such hydroxyl groups; o-, m- or p-phenylene or such phenylene substituted by one or two alkyl of 1 to 4 carbon atoms, or R2 is - (CH2) kO [(CH2) kO] h (CH2) k- where k is 2 a 4 and h is 1 to 40, or Ri and R2 together with the two N atoms to which they are attached are piperazin-1,4-diyl, when x is 3, Ri is hydrogen, R2 is alkylene from 4 to 8 carbon atoms interrupted by a nitrogen atom, when x is 4, Ri is hydrogen, R 2 is alkylene of 6 to 12 carbon atoms interrupted by two nitrogen atoms, R 3 is hydrogen, alkyl of 1 to 8 carbon atoms, alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or both interrupted by one or two oxygen atoms and substituted by a hydroxyl group, p is 2 or 3, and Q is an alkali metal salt, ammonium or N + (GX) 4,. in the formulas DD and DD * m is 2 or 3, when m is 2, G is (CH2CHR-0) rCH2CHR-, where r is 0 to 3, and R is hydrogen or methyl, and when m is 3, G is glyceryl, in the formulas EE and EE * G2 is -CN, -C0NH2 or -COOG3 where G3 is hydrogen, alkyl of 1 to 18 carbon atoms or phenyl, X is an an inorganic or organic anion, such as phosphate, phosphonate, carbonate, bicarbonate, nitrate, chlorine, bromine, bisulfite, sulfite, bisulfate, sulfate, borate, formate, acetate, benzoate, citrate, oxalate, tartrate, acrylate, polyacrylate, fumarate, maleate, itaconate, glycolate, gluconate, maleate, mandelate, tiglato, ascorbate, polymethacrylate, a nitriloacetic acid carboxylate, hydroxyethylenediaminetriacetic acid, ethylene diaminotetraacetic acid or diethylenetriaminepentaacetic acid, a diethylenetriaminepentamethylenephosphonate, an alkylsulfonate or an aryl sulfonate, and where the total cation charge h equals the total charge of anions j , and with the condition that the bis (2, 2, 6,6-tetramethylpiperidin-4-yl) cation or the polycondensation product of 1- (2-hydroxyethyl) -2,6,6-tetramethyl-4-idroxypiperidine and succinic acid are exclude. More preferably, the compounds of component (b) are those of formulas A, A *, B, B *, C, C * f D, D *, Q, Q *, R, R *, S, S * , X, X *, Y, Y *, Z and Z *, where E is oxyl or hydroxyl, R is hydrogen, in the formulas A and A * n is 1 or 2, when n is 1, Ri is hydrogen, alkyl from 1 to 6 carbon atoms, alkenyl of 2-6 carbon atoms, propargyl, glycidyl, alkyl of 2 to 20 carbon atoms interrupted by -one to ten oxygen atoms, such alkyl substituted by one to five hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or Ri is alkyl of 1 to 4 carbon atoms substituted by a carboxy group or by -COOZ where Z is hydrogen or alkyl of 1 to 4 carbon atoms, when n is 2, Ri is alkylene of 1 to 8 carbon atoms, alkenylene of 4 to 8 carbon atoms, alkylene of 1 to 20 carbon atoms interrupted by one to ten oxygen atoms , substituted by one to five hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, in formulas B and B * m is 1 or 2 when m is 1, R2 is alkyl of 1 to 4 carbon atoms or R2 is CH2 (OCH2CH2) pOCH3 wherein n is 1 to 12, or R2 is phenyl, or such phenyl substituted by one to three methyl groups, R2 is -NHR3 where R is alkyl of 1 to 4 carbon atoms or phenyl, or such substituted phenyl by one or two methyl groups, when m is 2, R2 is alkylene of 1 to carbon atoms, alkenylene of 4 to 8 carbon atoms, or R2 is -CH2 (OCH2CH2) nOCH2- where n is 1 to 12, or R2 is NHR4NH where R4 is 2 to 6 carbon atoms, aralkylene of 8 to 15 carbon atoms or arylene of 6 to 12 carbon atoms, or R2 is -CO- or -NHCONH, in formulas C and C *, Rio is hydrogen or, alkanoyl of 1 to 3 carbon atoms, x is 1 or 2 when x is 1, Rn is hydrogen, alkyl of 1 to 6 carbon atoms or glycidyl, Rn is alkyl of 1 to 4 carbon atoms substituted by a carboxy group or by COOZ where Z is hydrogen or alkyl of 1 to 4 carbon atoms, when x is 2, Rn is alkylene of 1 to 6 carbon atoms, in formulas D and D * Rio is hydrogen, and is 1 or 2, R12 c As R2 was defined above, in the formulas Y, Y *, Z and Z *, x is 1 or 2, when x is 1, Ri and R2 are independently alkyl of 1 to 4 carbon atoms, or Ri and R2 together are tetramethylene, or pentamethylene, R2 is hydrogen or alkyl of 1 to 4 carbon atoms, such alkyl group substituted by a hydroxyl group, when x is 2, Ri is hydrogen, alkyl of 1 to 4 carbon atoms, such alkyl substituted by a hydroxyl groups, R2 is alkylene of 2 to 6 carbon atoms, R 3 is as defined above. Especially preferred, the compounds of component (b) are those of the formulas A, A *, B, B *, C, C *, D, D *, Q, Q *, R and R *, where E is oxyl or hydroxyl, R is hydrogen, in the formulas A and A *, h is 1, Ri is hydrogen, alkyl of 1 to 4 carbon atoms, glycidyl, alkyl of 2 to 4 carbon atoms interrupted by one or two oxygen atoms, such alkyl substituted by one or two hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or Ri is alkyl of 1 to 4 carbon atoms substituted by -COOZ where Z is hydrogen or alkyl of 1 to 4 carbon atoms, in formulas B and B *, m is 1 or 2, R is alkyl of 1 to 4 carbon atoms or R2 is CH2 (OCH2CH2) nOCH3 where n is 1 to 4, when m is 2, R2 is alkylene of 1 to 8 carbon atoms, in formulas C and C *, Rio is hydrogen or alkanoyl of 1 or 2 carbon atoms, x is 1 or 2, when x is 1, Ru is hydrogen, alkyl of 1 to 4 atoms of ca rbono or glycidyl, Rn is alkyl of 1 to 4 carbon atoms substituted by COOZ where Z is hydrogen or alkyl of 1 to 4 carbon atoms, when x is 2, Rn is alkylene of 1 to 6 carbon atoms, in the formulas D and D *, Rio is hydrogen, and is 1 or 2, R? 2 is as defined above R2. More particularly, the hindered amine compound is (a) bis (l-oxyl-2, 2-6-6-tetramethylpiperidin-4-yl) sebacate; (b) bis (l-hydroxy-2, 2-6-6-tetramethylpiperidin-4-yl) sebacate; (c) l-hydroxy-2-, 2-6-6-tetramethyl-4-acetoxypiperidinium citrate; (d) l-oxyl-2,2,6,6-tetramethyl-4-acetamidopiperidine; (e) l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamido-piperidine; (f) l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamidopiperidinium bisulfate; (g) l-oxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidine; (h) l-hydroxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidine; . (i) l-hydroxy-2,2,6,6-tetramethyl-4-oxo-piperidinium acetate; (j) l-oxyl-2, 2,6,6,6-tetramethyl-4-methoxy-piperidine; (k) l-hydroxy-2, 2,6,6,6-tetramethyl-4-methoxy-piperidine; (1) l-hydroxyl-2, 2,6,6,6-tetramethyl-4-methoxy-1-piperidinium acetate; (m) l-oxyl-2, 2,6,6,6-tetramethyl-4-acetoxypiperidine; (n) l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetoxypiperidine; (o) l-oxyl-2, 2,6,6,6-tetramethyl-4-propoxy-piperidine; (p) l-hydroxy-2, 2,6,6,6-tetramethyl-4-propoxy-piperidinium acetate; (q) l-hydroxy-2, 2, 6, 6-tetralmethyl-4-propoxy-piperidine; (r) l-oxyl-2, 2,6,6,6-tetramethyl-4- (2-hydroxy-4-oxapentoxy) piperidine; (s) l-hydroxy-2, 2, 6,6-tetramethyl-4- (2-hydroxy-4-oxapentoxy) piperidinium aetate; (t) l-oxyl-2, 2,6,6-tetramethyl-4-hydroxypiperidine; (u) l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxy-piperidine; (v) l-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium chloride; . () l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium acetate; (x) l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium bisulfate; (y) l-hydroxy-2, 2, 6, d-tetramethyl-4-hydroxypiperidinium citrate; (z) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium citrate); (aa) citrate of tris (l-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidinium; tetra (1-hydroxy-2, 2, 6,6-tetramethyl-4-hydroxypiperidinium) (bb) ethylenediaminetetraacetate) (ce) ethylenediaminetetraacetate tetra (1-hydroxy-2,2,6,6-tetramethyl-acetamidopiperidinium); (dd) ethylenediaminetetraacetate tetra (1-hydroxy-2,2,6,6-tetramethyl-4-oxopiperidinium) (ee) penta diethylenetriaminepentaacetate (1-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium); (ff) penta diethylenetriaminepentaacetate (1-hydroxy-2,2,6,6-tetramethyl-4-acetamidopiperidinium); (gg) penta diethylenetriaminepentaacetate (1-hydroxy-2, 2,6,6,6-tetramethyl-4-oxopiperidinium); (hh) tri (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium nitrilotriacetate); (ii) tri (1-hydroxy-2, 2, 6, 6-tetramethyl-4-acetamidopiperidinium nitrilotriacetate); (jj) tri (1-hydroxy-2, 2, 6, 6-tetramethyl-4-oxopiperidinium nitrilotriacetate); (kk) penta diethylenetriaminepentamethylenephosphonate (l-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidinium); (11) Penta diethylenetriaminpentamethylenephosphonate (l-hydroxy-2,2,6,6-tetramethyl-4-acetamidopiperidinium); (mm) Penta diethylenetriaminpentamethylenephosphonate (l-hydroxy-2, 2,6,6-tetramethyl-4-oxopiperidinium). More especially, the hindered amine compound is (a) l-oxyl-2,4,6,6-tetramethyl-4-hydroxypiperidine; (b) l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxy-piperidine; (c) l-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium chloride; (d) l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium acetate; (e) l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium bisulfate; (f) l-hydroxy-2, 2, 6,6-tetramethyl-4-hydroxypiperidinium citrate; (g) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium citrate); (h) tris (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium) sitrate; (i) tetra (1-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium) ethylenediamine tetraacetate; (j) tetra (1-hydroxy-2, 2,6,6,6-tetramethyl-4-asetamidopiperidinium) ethylenediaminetetraacetate; (k) tetra (1-hydroxy-2,2,6,6-tetramethyl-4-oxopiperidinium) ethylenediaminetetraacetate; (1) penta diethylenetriaminepentaacetate (1-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium); (m) penta diethylenetriaminepentaacetate (1-hydroxy-2,2,6,6-tetramethyl-4-acetamidopiperidinium); (n) penta diethylenetriaminepentaacetate (1-hydroxy-2, 2,6,6,6-tetramethyl-4-oxopiperidinium). The present compositions may additionally include an effective stabilizing amount or at least one coadjutor selected from the group consisting of UV absorbers, polymeric inhibitors, sulfur-containing inhibitors, phosphorus-containing compounds, nitrones, benzofuran-2 and the hydroxylamines and mixtures thereof. The compositions, which also include a UV absorber are especially preferred. The UV absorbers are selected from the group consisting of benzotriazoles, s-triazines, benzophenones, a-cyanoacrylates, oxanilides, benzoxazinones, benzoates and a-alkyl cinnamates. Preferably, the UV absorber is a benzotriazole, an a-triazine or a benzophenone, more especially a benzotriazole UV absorber or benzophenone UV absorber. The amount of the preferred coadditive is from 0.001 to 5%, more preferably from 0.005 to 2%, especially from 0.01 to 2% by weight based on the pulp or paper. Typical compositions of the invention are those wherein the additional co-additive is a UV absorber, which is preferably selected from the group consisting of benzotriazoles, s-triazines, benzophenones, a-cyanoacrylates, oxanilides, benzoxazinones, benzoates and a-alkyl cinnamates, especially benzotriazoles, s-triazines and benzophenones; • the additional co-additive is a polymeric inhibitor, which is preferably poly (ethylene glycol), poly (propylene glycol), poly (butylene glycol), poly (vinyl pyrrolidone) or poly (ethylene / propylene glycol); • the additional co-additive is a fluorescent whitening agent, preferably selected from the group consisting of 4,4'-bis- (triazinylamino) -stilben-2, 2'-disulfonic acid, 4,4'-bis- ( triazol-2-yl) stilbene-2, 2'-disulfonic, 4,4'-dibenzofuranyl-biphenyls,, - (diphenyl) -stilbenes, 4, 4 f -distiryl-biphenyls, 4-phenyl-4'-benzoxazolyl -stilbenes, stilbennyl-naphthotriazoles, 4-styryl-stilbenes, bis- (benzoxazol-2-yl) derivatives, bis- (benzimidazol-2-yl) derivatives, coumarins, pyrazolines, naphthalimides, triazinyl-pyrenes, 2-styryl -benzoxazole or -naftoxazoles, benzimidazole-benzofurans and oxanilides; • the additional coadit is a metal chelating agent, preferably ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), hydroxyethylenediaminetriacetic acid (HEDTA), nitrilotriacetic acid (NTA) or diethylenetriaminepentamethylene phosphonic acid (DTPMPA); • the additional coaditrant is a mixture of a UV absorber and polymeric inhibitor; • the additional co-additive is a mixture of a UV absorber and a fluorescent whitening agent; • the additional coadit is a mixture of a UV absorber and metal chelating agent; • the additional coaditrant is a mixture of a polymeric inhibitor and a fluorescent whitening agent; • the additional coaditrant is a mixture of a polymeric inhibitor and a metal chelating agent; • the additional coaditrant is a mixture of a metallic bleaching agent and a metal chelating agent; • the additional co-additive is a mixture of a UV absorber, a polymeric inhibitor and a metal chelating agent; • the additional coaditrant is a mixture of a fluorescent chelating agent, a polymeric inhibitor and a metal chelating agent. Typical and useful UV absorbers are, for example, (a) 5-chloro-2- (2-hydroxy-3,5-di-tert-butylphenyl) -2H-benzotriazole; (b) 2- (2-hydroxy-3,5-di-tert-butylphenyl) -2H-benzotriazole; (c) 2- (2-hydroxy-3,5-di-tert-amylphenyl) -2H-benzotriazole; (d) 2- (2-hydroxy-3,5-di-a-cumylphenyl) -2H-benzotriazole; (e) 2- (2-hydroxy-3-cumyl-5-tert-octylphenyl) -2H-benzotriazole; (f) 2- (2-hydroxy-5-tert-octylphenyl) -2H-benzo-triazole; (g) monosodium salt of 3- (2H-benzotriazol-2-yl) -4-hydroxy-5- (1-methylpropyl) -benzenesulfonic acid; (h) 3-tert-butyl-4-hydroxy-5- (2H-benzotriazol-2-yl) -hydrocinnamic acid and sodium salt; (i) 12-hydroxy-3,6,9-trioxadodecyl-3-tert-butyl-4-hydroxy-5- (2H-benzotriazol-2-yl) hydrocinnamate; (j) octyl 3-tert-butyl-4-hydroxy-5- (2H-benzotriazol-2-yl) hydrocinnamate; (k) 4, 6-bis (2,4-dimethylphenyl) -2- (4- (3-dodecyloxy * -2-hydroxypropoxy) -2-hydroxyphenyl) -a-triazine (* is the mixture of oxy isomers of C 2-C 4); (1) 4, 6-bis (2,4-dimethylphenyl) -2- (4-octyloxy-2-hydroxyphenyl) -s-triazine; (m) 2,4-dihydroxybenzophenone; (n) disodium salt of 2,2 '-dihydroxy-,' -dimethoxy-5,5'-disulfobenzophenone; (o) 2-hydroxy-4-octyloxybenzophenone; (p) 2-hydroxy-4-dodecyloxybenzophenone; (q) 2,4-dihydroxybenzophenone; (r) 2, 2 ', 4, 4' -tetrahydroxybenzophenone; (s) 4-aminobenzoic acid; (t) 2,3-dihydroxypropyl-4-aminobenzoic acid; (u) 3- (4-imidazolyl) acrylic acid; (v) 2-phenyl-5-benzimidazole sulfonic acid; . () N, N, trimethyl-α- (2-oxo-3-bornylidene) -p-toluidinium methyl sulfate; (x) sodium salt of 5-benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid; (and) 3- (4-benzoyl-3-hydroxyphenoxy) -2-hydroxy-N, N, N-trimethyl-1-propanaminium chloride (z) 3- [4- (2H-benzotriazole-2-yl chloride ) -3-hydroxyphenoxy] -2-hydroxy-N, N-trimethyl-1-propanaminium; (aa) 2- (2-hydroxy-5-methylphenyl) -2H-benzotriazole; and (bb) 2, 2'-dihydroxy-4,4'-dimethoxybenzophenone (Uvinul® 3049). Preferred UV absorbers are (a) monosodium salt of 3- (2H-benzotriazol-2-yl) -4-hydroxy-5- (1-methylpropyl) -benzenesulfonic acid; (b) acid and sodium salt of 3-tert-butyl-4-hydroxy-5- (2H-benzotriazol-2-yl) -hydrocinnamic acid (c) 2- (2-hydroxy-3,5-di-tert-butylphenyl) ) -2H-benzotriazole; (d) 2- (2-hydroxy-3,5-di-tert-amylphenyl) -2H-benzotriazole; (e) 4,6-bis (2,4-dimethylphenyl) -2- (4- (3-dodecyloxy * -2-hydroxypropoxy) -2-hydroxyphenyl) -s-triazine (* is the mixture of oxy isomers of C ?2_? ); (f) 12-hydroxy-3,6,9-trioxadodecyl 3-tert-butyl-4-hydroxy-5- (2H-benzotriazol-2-yl) hydrocinnamate; (g) 2, -dihydroxybenzophenone; (h) 2,2'-dihydroxy-4,4'-dimethoxy-5'-disulfobenzophenone disodium salt; (i) 2, 2 ', 4, 4' -tetrahydroxybenzophenone; (j) 3- (4-benzoyl-3-hydroxyphenoxy) -2-hydroxy-N, N, -trimethyl-1-propanaminium chloride; (k) 3- [4- (2H-benzotriazol-2-yl) -3-hydroxyphenoxy] -2-hydroxy-N, N, N-trimethyl-1-propanaminium chloride; (1) Sodium salt of 5-benzoyl-4-hydroxy-2-methoxy-benzenesulfonic acid (m) 2- (2-hydroxy-3-a-cumyl-5-tert-octylphenyl) -2H-benzotriazole. Other preferred compositions are those which additionally confine a metal chelating agent, ie those which offer thermodynamic or kinetic control or metal ions. Examples of kinetic control chelating agents are citrates, keto acids, gluconates, heptagluconates, phosphates, and phosphonates. Examples of chelating agents that offer dynamic control are aminocarboxylic acid chelates. Members of these classes are well known and commercially available including ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), hydroxyethylethylene diaminotriacetic acid (HEDTA), nitrilotriacetic acid (NTA) and diethylenetriaminepentamethylenephosphonic acid (DTPMPA), Still other preferred compositions are those , which contain mixtures of thermodynamic and kinetic control chelating agents are also preferred. Still other preferred compositions are those, which contain a polymeric inhibitor; preferably poly (ethylene glycol) (PEO), poly (propylene glycol.) (PPO), poly (butylene glycol) (PTHF), poly (vinyl pyrrolidone) (PVP) or poly (ethylene glycol) covered with thiol, as well as copolymers such as poly (ethylene / propylene glycol). Still other preferred compositions are those, which additionally contain a fluorescent whitening agent selected from a wide range of chemical types such as 4,4'-bis- (triacylamine) acids. -stilben-2, 2'-disulfonic acid, 4, '-bis- (triazol-2-yl) stilbene-2, 2'-disulfonic acid, 4,4'-dibenzofurani-1-biphenyls, 4, 4' - (diphenyl) -stilbenes 4, '-distyryl-biphenyls, 4-phenyl-4'-benzoxazolyl-stilbenes, stilbennyl-naphthotriazoles, 4-stiril-stilbenes, bis- (benzoxazol-2-yl) derivatives, bis- (benzimidazole- 2-yl), coumarins, pyrazolines, naphthalimides, triazinyl-pyranes, 2-styryl-benzoxazole or -naftoxazoles, benzimidazole-benzofurans or oxanilides. additional stabilizers have a mixture such as a mixture of a UV absorber and polymeric inhibitor; or a mixture of a UV absorber and a metal chelating agent; or a mixture of a polymeric inhibitor and a metal chelating agent; or a mixture of a polymeric inhibitor and a fluorescent whitening agent; or a mixture of a fluorescent whitening agent and a metal chelating agent; or a mixture of a UV absorber, metal chelating agent and a polymeric inhibitor; or a mixture of fluorescent whitening agent, metal chelating agent and polymeric inhibitor. Preferably, the compositions are those in which the compound of formula I or II is low in weight or contains hydrophilic portions, especially cationic groups, is both low in molecular weight and contains hydrophilic portions. The present invention also pertains to a process for preventing the loss of brightness and for improving resistance to yellowing of chemimechanical or thermomechanical pulp or paper, which still contains lignin, which comprises treating the pulp or paper with an effective stabilizing amount of a composed of the formula I or II, preferably a compound of the formula A to EE or A * to EE * as described above. Preferably, the process is that wherein in the compound of formula A to EE or A * to EE *, E is oxyl or hydroxyl and more preferably E is hydroxyl. Additional compounds useful within this invention are those of formula III, Illa, Illb or IIIc where n is ORioi or NR? nRu2 Rioi is alkenyl of 2 to 4 carbon atoms, propargyl, glycidyl, alkyl of 2 to 6 carbon atoms interrupted by one or two oxygen atoms, substituted by one to three hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or Rioi is alkyl of 1 to 4 carbon atoms substituted by carboxy or by the alkali metal, ammonium or alkylammonium salts of C? -C4 thereof; or R? 01 is alkyl substituted by -COOEio where En is methyl or ethyl, R102 is alkyl of 3 to 5 carbon atoms interrupted by -COO- or by -CO, or R? 02 is -CH2 (OCH2CH2) cOCH3 where c it's 1 to 4; or R102 is -RH? o3 wherein R? 03 is alkyl of 1 to 4 carbon atoms, a is 2 to 4, when a is 2, Tn is (CH2CHR? oo-0) dCH2CHR? 0o- where d is 0 or 1, and Rioo is hydrogen or methyl, when a is 3, Tu is glyceryl, when a is 4, Ta a neopentatetrail, b is 2 or 3, when b is 2, Gu is (CH2CHR? Oo-0) eCH2CHR? 0o -, where e is 0 to 3, and Rioo is hydrogen or methyl, and when b is 3, Gu is glyceryl; Rin is hydrogen, alkyl of 1 to 4 carbon atoms, or such alkyl substituted by one or two hydroxyl, interrupted by one or two oxygen atoms, or both substituted by a hydroxyl and interrupted by one or two oxygen atoms, R112 is -CO-R113 where Rp3 has the same meaning as Rin, or R113 is -NHRm where Rm is alkyl of 1 to 4 carbon atoms, such alkyl substituted by one or two hydroxyl, substituted by alkoxy of 1 to 2 carbon atoms, or both alkyls substituted by a hydroxyl and by an alkoxy of 1 to 2 carbon atoms, or Rui and R112 together are -CO-CH2CH2-CO-, -CO-CH-CH-CO- or - (CH2) 6-CO-; and with the proviso that, when R113 is alkyl of 1 to 4 carbon atoms, R is not hydrogen. Preferably in the compound of formula III, R101 is allyl, methallyl, glycidyl, 2,3-dihydroxypropyl, 2-hydroxy-4-oxapentyl or -CH2C00H. Preferably in the compound of formula Illa, R? 02 is methoxymethyl, 2-methoxyethoxymethyl, 2- (2-methoxyethoxy) ethoxymethyl, -CH2C0CH3, -CH2CH2COOCH3 or butylamino. Preferably in the compound of formula Illb, a is 2, Tu is (CH2CHR-Q) qCH2CHR? 0o-, where d is 0, and 100 is hydrogen. Preferably in the compound of formula IIIc, b is 2, Gn is (CH2CHR-0) eCH2CHR? Oo- where e is 0 or 1, and R100 is hydrogen.

Preferably in the compound of formula III, Rin is hydrogen or n-butyl. Preferably in the compound of formula III, Rin is -CQ-R113 where Rn3 is hydrogen, methyl, ethyl, n-propyl, isopropyl, methoxymethyl or 2-methoxyethoxymethyl; or R? 02 is N-butylcarbamoyl. Preferred compounds of formula III or formula Illa are: (a) l-oxyl-2, 2,6,6-tetramethyl-4-allyloxypiperidine; (b) l-oxyl-2, 2, 6, ß-tetramethyl-4- (2-methoxyethoxy) -piperidine; (c) l-oxyl-2,2,6,6-tetramethyl-4-glycidyloxy-piperidine; (d) l-oxyl-2, 2, 6,6-tetramethyl-4- (2,3-dihydroxy-propoxy) piperidine; (e) l-oxyl-2,2,6,6-tetramethyl-4- (2-hydroxy-4-oxapentoxy) piperidine; (f) l-oxyl-2, 2, 6,6-tetramethyl-4- (carboethoxy-mephoxy) piperidine; (g) l-oxyl-2, 2,6,6,6-tetramethyl-4- (carboxymethoxy) -piperidine; (h) l-oxyl-2,2,6,6-tetramethylpiperidin-4-yl-2-methoxyethoxyacetate; (i) l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl-2- (2-methoxyethoxy) ethoxyacetate; (j) l-oxyl-2, 2,6,6,6-tetramethyl-piperidin-4-yl methoxyacetate; (k) l-oxyl-2, 2,6,6,6-tetramethyl-piperidin-4-yl methylsuccinate; (1) l-oxyl-2, 2-6,6-tetramethyl-piperidin-4-yl acetoacetate; (m) l-oxyl-2, 2, 6,6-tetramethyl-piperidin-4-yl butylcarbamate; or (n) N- (1-oxy-2-, 2,6,6-tetramethylpiperidin-4-yl) formamide, (o) N- (1-oxy-2-, 2,6,6-tetramethylpiperidin-4-yl) ) methoxyacetamide, (p) N- (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -2-methoxyethoxyacetamide (q) l-butyl-3- (l-oxyl-2, 2, 6 , 6-tetramethylpiperidin-4-yl) urea (r) N-butyl-N- (l-oxyl-2, 2,6,6-tetramethylpiperidin-4-yl) formamide (s) N-butyl-N- (l -oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) acetamide, (t) N- (1-oxyl-2, 2,6,6-tetramethylpiperidin-4-yl) succinimide, (u) N- (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) maleimide, or (v) N- (1-oxy-2-, 2,6,6-tetramethylpiperidin-4-yl) caprolactam. The most preferred among these compounds are (a), (c), (d), (e), (f), (h), (i), (k), (m), (n), (o) , (r) and (s); especially preferred are (a), (d), (e) and (r). Also preferred are the compounds of formulas Illd and Ule: where Bn is 0E9 or NEuE? 2 Eg is alkyl of 2 to 6 carbon atoms interrupted by one or two oxygen atoms, substituted by two to three hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or Eg is alkyl of 1 to 4 carbon atoms substituted by carboxy or by the alkali metal, ammonium or lower alkylammonium salts thereof; or Eg is alkyl substituted by -COOEio where Eio is methyl or ethyl, and Es is alkyl of 3 to 5 carbon atoms interrupted by -COO- or by -CO-, or E8 is -CH2 (OCH2CH2) aOCH3 where a is 1 to 4; or Eg is -NHE7 where E is alkyl of 1 to 4 carbon atoms; In is hydrogen or alkyl of 1 to 4 carbon atoms, and E12 is -CO-E? 3 where E? 3 is alkyl of 1 to 4 carbon atoms, alkyl which is interrupted by one or two oxygen atoms, or E13 is -NHE? 4 where Ei4 is alkyl of 1 to 4 carbon atoms; with the proviso that Eg is not 2, 3-dihydroxypropyl. The preferred compounds are those where Eg is 2-Hydroxy-4-oxapentyl or -CH2C00H. Other preferred compounds are those where En is hydrogen or butyl, E 3 is methoxymethyl or 2-methoxyethoxymethyl; or Ei2 is N-butylcarbamoyl. Preferred compounds are those wherein E8 is methoxymethyl, 2-methoxyethoxymethyl, 2- (2-methoxyethoxy) -ethoxymethyl, -CH2OOCH3, -CH2CH2COOCH3 or butylamino. The specifically preferred compounds are: l-oxyl-2, 2, 6,6-tetramethyl-4- (2-hydroxy-4-oxa-pentoxy) piperidine, l-oxyl-2,2,6, b-tetramethyl-4 - (carboxymethoxy) -piperidine, l-oxyl-2, 2,6,6-tetramethylpiperidin-4-yl-2- (2-methoxyethoxy) ethoxyacetate, l-oxyl-2, 2, 6,6-tetramethyl-methoxyacetate piperidin-4-yl, l-oxyl-2, 2,6,6-tetramethylpiperidin-4-yl methylsuccinate, N- (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -methoxyacetamide, N- (l-oxyl-2, 2, 6, ß-tetramethylpiperidin-4-yl) -2-methoxyethoxysetamide, or l-butyl-3- (l-oxyl-2, 2,6,6-tetramethylpiperidin-4-) il) urea. The compounds of formula III, Illa, Illb, lile, Illd and lile can be prepared by standard organic chemistry methods according to methods known in the art or analogously to those methods. Intermediaries are partially commercially available. The present invention also pertains to new compounds of formula IV, V, VI, VII or VIII where n is 2 to 3, Gi is hydrogen, methyl, ethyl, butyl or benzyl, X is an inorganic or organic anion, as described above for some compounds of component (b) of the present compositions, m is 1 to 4 , x is 1 to 4, when x is 1, Ri and R2 are independently alkyl of 1 to 18 carbon atoms, such alkyl interrupted by one to five oxygen atoms, such alkyl substituted by 1 to 5 hydroxyl groups or such of both alkyls interrupted by such oxygen atoms and substituted by such hydroxyl groups; cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 10 carbon atoms or such an aryl substituted by one to three alkyl of 1 to 8 carbon atoms, or R1 is also hydrogen, or Ri and R2 together are tetramethylene, pentamethylene, hexamethylene or 3-oxapentamethylene, when x is 2, Ri is hydrogen, alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group , or such of both alkyls interrupted by one or two oxygen atoms and substituted by a hydroxyl group, R 2 is alkylene of 2 to 18 carbon atoms, such alkylene interrupted by one to five oxygen atoms, such alkylene substituted by 1 to 5. hydroxyl groups or such alkylene, both interrupted by such oxygen atoms and substituted by such hydroxyl groups; o-, m- or p-phenylene or such phenylene substituted by one or two alkyl of 1 to 4 carbon atoms, or R2 is - (CH2) kO [(CH2) kO) h (CH2) k- where k is 2 a 4 and h is 1 to 40, or Ri and R2 together with the two N atoms to which they are attached are piperazin-1,4-diyl, when x is 3, Ri is hydrogen, R 2 is alkylene of 4 to 8 carbon atoms interrupted by a nitrogen atom, when x is 4, Ri is hydrogen, R 2 is alkylene of 6 to 12 carbon atoms interrupted by two nitrogen atoms, R 3 is hydrogen, 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or both interrupted by one or two oxygen atoms and substituted by a hydroxyl group, p is 2 or 3, and Q is an alkali metal, ammonium or N + (G?) Salt. Preferably, in the compounds of formulas IV to VIII n is 2; Gi is hydrogen or methyl; X is chlorine or bromine; x is 1 or 2, Ri and R2 are independently alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or such of both alkyls interrupted by one or two atoms of oxygen and substituted by a hydroxyl group, or Ri is hydrogen; or Ri and R2 together are 3-oxa-pentamethylene; R3 is hydrogen or alkyl of 1 to 2 carbon atoms, or such alkyl substituted by a hydroxyl group, p is 2, m is 1, and Q is Na +, NH4 + or N (CH3) 4 \ Typically the compounds that fall within of the structures of formulas IV to VIII and which are useful in this invention are: (a) l-oxyl-2, 2, 6,6-tetramethyl-4- (2-hydroxy-4-oxa-6-chloride. trimethylammoniohexyloxy) piperidine; (b) l-oxyl-2, 2,6,6-tetramethyl-4- (2-hydroxy-3-trimethylammoniopropoxy) piperidine chloride; (c) l-oxyl-2, 2, 6,6-tetramethyl-4-chloride. { 2-hydroxy-3- [di (2-hydroxyethyl) amino] propoxy Jpiperidine; (d) l-oxyl-2, 2,6,6,6-tetramethyl-4- (2-hydroxy-3-dimethylammoniopropoxy) piperidine chloride; (e) l-oxyl-2,4,6,6-tetramethyl-4- (2-hydroxy-3-diethylammoniopropoxy) piperidine chloride; (f) N, N'-dimethyl-N, N '-bis- [3- (l-oxyl-2,6,6,6-tetramethyl-piperidin-4-yloxy) -2-hydroxypropyl] hexamethylene diamine; (g) N, N, ', N' -tetramethyl-N, N '-bis- [3- (l-oxyl-2,2,6,6-tetramethylpiperidin-4-yloxy) -2-hydroxy- dibromide. propyl] -hexamethylene diamine; (h) l-oxyl-2, 2,6,6,6-tetramethyl-4- [2-hydroxy-3- [N, -dimethyl-N-propylammonium) propoxy] piperidine chloride; (i) sodium l-oxyl-2, 2, 6,6-tetramethylpiperidin-4-yloxyacetate; or (j) colin ester of l-oxyl-2,4,6,6-tetramethylpiperidin-4-yloxyacetyl acid. The present also belongs to novel hydroxylamine salts of formulas A * D * X * Y * Z *, AA *, BB *, CC * and DD * R is hydrogen, in the formula A * where n is 1, Ri is hydrogen or alkyl of 1 to 4 carbon atoms, preferably hydrogen, in the formula D * and is 1, Rio is hydrogen or methyl, preferably hydrogen, R12 is alkyl of 1 to 4 carbon atoms, preferably methyl, x is phosphate, phosphonate, carbonate, bicarbonate, nitrate, chlorine, bromine, bisulfite, sulfite, bisulfate, sulfate, borate, formate, acetate, benzoate, citrate, oxalate, tartrate, acrylate, polyacrylate, fumarate, maleate, itaconate, glycolate, gluconate, malate, mandelate, tiglato, ascorbate, polymethacrylate, a nitrilotriacetic acid carboxylate, hydroxyethylethylenediaminetriacetic acid, ethylenediaminetetraacetic acid or diethylenetriaminepentaacetic acid, a diethylenetriaminepentamethylenephosphonate , an alkylsulphonate or an arylsulphonate where the total charge of cations h is equal to the total charge of anions j, where in formulas X * to DD * n is 2 to 3, Gi is hydro geno, methyl, ethyl, butyl or benzyl, m is 1 to 4, x is 1 to 4, when x is 1, Ri and R2 are independently alkyl of 1 to 18 carbon atoms, such alkyl interrupted by one to five carbon atoms. oxygen, such alkyl substituted by 1 to 5 hydroxyl groups or such of both alkyls interrupted by such oxygen atoms and substituted by such hydroxyl groups; cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or such aryl substituted by one to three alkyl of 1 to 8 carbon atoms, or Rx is also hydrogen, or Ri and R2 together are tetramethylene, pentamethylene, hexamethylene or 3-oxapentamethylene, when x is 2, Ri is hydrogen, alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a group hydroxyl, or such of both alkyls interrupted by one or two oxygen atoms and substituted by a hydroxyl group, R 2 is alkylene of 2 to 18 carbon atoms, such alkylene interrupted by one to five oxygen atoms, such alkylene substituted by 1 to 5 hydroxyl groups or such alkylene, both interrupted by such oxygen atoms and substituted by such hydroxyl groups; o-, m- or p-phenylene or such phenylene substituted by one or two alkyl of 1 to 4 carbon atoms, or R2 is - (CH2) kO [(CH2) kO] h (CH2) k- where k is 2 a 4 and h is 1 to 40, or Ri and R2 together with the two N atoms to which they are attached are piperazin-1,4-diyl, when x is 3, Ri is hydrogen, R2 is alkylene of 4 to 8 carbon atoms interrupted by a nitrogen atom, when x is 4, Ri is hydrogen, R2 is alkylene of 6 to 12 carbon atoms interrupted by two nitrogen atoms, R3 is hydrogen, alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or both interrupted by one or two oxygen atoms and substituted by a hydroxyl group, p is 2 or 3, and Q is an alkali metal salt , ammonium or N + (G?), in the formulas DD and DD * m is 2 or 3, when m is 2, G is - (CH2CHR-0) rCH2CHR-, where r is from 0 to 3, and R is hydrogen or methyl, and when m is 3, G is glyce rilo, with the proviso that in the formula A * when Ri is hydrogen, X is not chlorine or bisulfate, and when in the formula D * when Rio is hydrogen and R? 2 is methyl, X is not chlorine or bisulfate. The preferred X anions for the novel compounds and hydroxylammonium salts of this invention are as defined above for the compounds of component (b) of the compositions of the invention. For example, X is preferably chlorine, bisulfate, bisulfite, sulfate, nitrate, acetate, citrate or carboxylate of ethylenediaminetetraacetic acid or diethylenetriaminepentaacetic acid.; more preferably, X is bisulfate or citrate. Of particular interest are the hydroxylamine salts: (a) l-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidium citrate; (b) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium citrate); (c) tris (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium citrate); (d) l-hydroxy-2, 2,6,6-tetramethyl-4-hydroxy-piperidinium DTPA; (e) bis (l-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypi-peridinium) DTPA; (f) tris (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxy-piperidinium) DTPA; (g) tetracis (1-hydroxy-2, 2, 6, 6-tetramethyl-4-hydroxy-piperidinium) DTPA; (h) pentacis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxy-piperidinium) DTPA; (i) l-hydroxy-2, 2, 6, β-tetramethyl-4-hydroxy-piperidinium EDTA; (j) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxy-piperidinium) EDTA; (k) tris (1-hydroxy-2, 2, 6, 6-tetramethyl-4-hydroxypiperidinium) EDTA; (1) tetracis (1-hydroxy-2, 2, 6, 6-tetramethyl-4-hydroxypiperidinium) EDTA; (m) l-hydroxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidinium citrate; (n) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidinium citrate); (o) tris (l-hydroxy-2, 2, 6, 6-tetramethyl-4-oxo-piperidinium citrate); (p) 1-hydroxy-2,2,6,6-tetramethyl-4-oxo-piperidinium DTPA; (q) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidinium) DTPA; (r) tris (l-hydroxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidinium) DTPA; (s) tetracis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidinium) DTPA; (t) pentacis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidinium) DTPA; (u) l-hydroxy-2,2,6,6-tetramethyl-4-oxopiperidinium EDTA; . (v) bis (l-hydroxy-2,2,6,6-tetramethyl-4-oxo-piperidinium) EDTA; (w) tris (l-hydroxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidinium) EDTA; (x) tetracis (l-hydroxy-2, 2, 6, 6-tetramethyl-4-oxo-piperidinium) EDTA; (y) l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamidopiperidinium citrate; (z) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamidopiperidinium citrate); (aa) tris (l-hydroxy-2, 2, 6, 6-tetramethyl-4-acetamidopiperidinium citrate); (bb) l-hydroxy-2, 2,6,6-tetramethyl-4-acetamido-piperidinium DTPA; (ce) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamido-piperidinium) DTPA; (dd) tris (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamido-piperidinium) DTPA; (ee) tetracis (1-hydroxy-2, 2,6,6-tetramethyl-acetamidopiperidinium) DTPA; (ff) pentacis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamidopiperidinium) DTPA; (gg) l-hydroxy-2, 2, 6, 6-tetramethyl-4-acetamido-piperidinium EDTA; (hh) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamidopiperidinium) EDTA; (ii) tris (l-hydroxy-2, 2, 6,6-tetramethyl-4-acetamido-piperidinium) EDTA; (j j) tetracis (1-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidinium) EDTA; (kk) l-hydroxy-2, 2, 6, ß-tetramethyl-4-acetoxypiperidinium citrate; (11) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetoxypiperidinium citrate); (mm) tris (l-hydroxy-2, 2, 6, 6-tetramethyl-4-acetoxipiperidinium citrate); (nn) l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetoxipiperidinium DTPA; (oo) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetoxy-piperidinium) DTPA; (pp) tris (l-hydroxy-2, 2, 6, 6-tetramethyl-4-acetoxy-piperidinium) DTPA; (qq) tetracis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetoxipiperidinium) DTPA; (rr) pentacis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetoxypiperidinium) DTPA; (ss) l-hydroxy-2, 2, 6, ß-tetramethyl-4-acetoxy-piperidinium EDTA; (tt) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetoxipiperidinium) EDTA; (uu) tris (1-hydroxy-2, 2,6, ß-tetramethyl-4-acetoxy-piperidinium) EDTA; or (vv) tetracis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetoxypiperidinium) EDTA; Nitroxides, hydroxylamines and alone or in combination with UV absorbers salts are also effective in imparting the resistance to yellowing of mechanical pulps, which are modified by acylation, alkylation, treatment with sodium borohydride or hydrogenated. The intermediates necessary to make the compounds of the present are great products of the trade. The effective stabilizing amounts of the hindered amine are from 0.001 to 5% by weight based on the pulp or paper. Preferably, the effective stabilizing amount is from 0.005 to 2% by weight; preferably 0.01 to 1% by weight.

When a stabilizing co-additive is present, the effective stabilizer amount of the co-additives is also 0.001 to 5% by weight based on the pulp or paper; preferably 0.005% by weight; more preferably 0.01 & '2% by weight. The inhibitor additive system herein can be added to the pulp or paper at a number of places during manufacturing or in process operations. These include a. on a pulp suspension in the dormant background; b. on a pulp suspension in or after the whitening step, in a storage, mixing or transfer bottom; c. on the hard pulp or after whitening, washing and dehydration followed by cylinder drying or instant drying; d. before or after the cleaners; and. before or after the ventilation pump to the main part of the paper machine; F. to the white water of the paper machine; g. to the silo or everything stored; h. in the pressure section using a size press, coater or spray bar; i. in the drying section using a size press, coater or spray bar; j. on the calandria using a box of plates; I; k. on paper in a size coater or press; and / or 1. in the curl control unit. Clearly, the precise location where the stabilizing additives can be added will depend on the specific equipment involved, the exact process conditions to be used and the like. In some cases, the additives can be added in one or more sites for greater effectiveness. At those various sites, the inhibitor additive system herein may also be added with a carrier or additive typically used in papermaking, such as retention aids, size adjuvants and solutions, starches, precipitated calcium carbonate, calcium carbonate. precipitate, or other clays or fillers, and polishing additives. The following examples are for illustration purposes only and were not constructed to limit the present invention in any way.

Treatment of hand towels All additives were applied by injecting with syringe the wt% of the appropriate additive combination in any aqueous solution when the additive is soluble in water, or a 1: 1 solution (ethanol / dioxane) in polished squares of bleached thermomechanical pulp (BTMP) (4 cm x 4 cm). The subject sheets were air dried for one day. The brightness of the hand towels was recorded before and after treatment by exposure to light. The rapid test was carried out by subjecting the treated sheets to light-induced accelerated yellowing in a ventilation-cooled light box containing eight fluorescent lamps with a maximum spectral output of 57.00 Á with a total output approximately 43 times greater than fluorescent lamps. of normal office. The lamps are only about ten inches (25.4 centimeters) from the hand towels so illuminated. The test environment was carried out by placing the treated hand towels on a desk under normal office cold white fluorescent lights at a nominal distance of six feet (1.8 meters). In both cases, the ISO brightness was followed as a function of the photolysis time and converted to the subsequent color number (PC number) in the usual manner. (Giertz, Svensk Papperstidn, (1945) 4_8 (13), 317) The subsequent color number (PC) was defined as follows: PC = [(k / s) after "k / s) before] X 100 where k and s are the absorption of the scattering coefficients, respectively, and Rj.nf is the value of the ISO brightness. The relationship between R¿nf and -the chromophore concentration is not linear, while the PC number is almost linear in relation to the concentration of the chromophore in the sample. Low PC numbers that indicate less yellowing are desirable. When environmental test conditions were used, the untreated BTMP hand towels were compared with the Kraft hand towels, 60 days later the BTMP hand towels had a PC number which is about 10 although the Kraft paper has a PC number which is 0.388742. Kraft hand towels are clearly less yellow than untreated BTMP hand towels after exposure to ambient light. The incident light flux for the acceleration of the yellowing experiments (Examples 1-4) is 43 times greater than that of ordinary office fluorescent lamps, as measured by digital light energy meter. Speery SLM-110. The brightness of the hand towels is followed and compared with those of the untreated sheets exposed in the same way. The treated leaves exhibited significant yellowing resistance as can be seen below.

Materials Used in the Examples. Compound A is l-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidine; Compound B is l-oxyl-2, 2, 6, β-tetramethyl-4-hydroxypiperidine; Compound C is l-oxyl-2, 2, 6,6-tetramethyl-4-acetamidopiperidine; Compound D is l-oxyl-2, 2, 6, 6-tetramethylpiperidine TEMPO; The compound is bis (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) sebacate; Compound F is l-hydroxy-2, 2, 6,6-tetramethyl-4-hydroxypiperidinium chloride; Compound G is l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium bisulfate; Compound H is bis (l-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium sulfate); Compound I is l-hydroxy-2, 2, 6,6-tetramethyl-4-hydroxypiperidinium acetate; Compound J is pentacis diethylenetriaminepentaacetic acid (l-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidinium); Compound K is 3- (4-benzyloxy-2,2,6,6-tetramethyl-piperidin-1-yloxy) -propionic acid methyl ester (PAX-3008); Compound L is 3- (4- {4- [1- (2-methoxycarbonyl-ethoxy) -2,2,6,6-tetramethyl-piperidin-4-yloxymethyl] -benzyloxy} methyl ester. -2, 2, 6, 6-tetramethyl-piperidin-1-yloxy) -propionic acid (PAX-3036); Compound M is 2,2- diethyl malonic acid ester of bis- (1-butylcarbamoyloxy-2, 2,6,6,6-tetramethyl-piperidin-4-yl) (PAX-3123); Compound N is the acetic acid ester of 4-hydroxy-2,2,6,6-tetramethyl-piperidin-1-yl (PAX-3136); Compound 0 is benzoic acid ester of 1-butoxycarbonyloxy-2,2,6,6-tetramethyl-piperidin-4-yl (PAX-3267); Compound P is 2, 2, 6, 6-tetramethyl-1- (1-phenyl-ethoxy) -piperidin-4-ol (PAX-3156) Compound O is 2,4-dihydroxybenzophenone; Compound R is 12-hydroxy-3,6-9-trioxadodecyl-3-tert-butyl-4-hydroxy-5- (2H-benzotriazol-2-yl) -hydrocinnamate (Tinuvin® 1130); Compound S is the monosodium salt of 3- (2H-benzotriazol-2-yl) -4-hydroxy-5- (1-methylpropyl) -benzenesulfonic acid (Cibafast® W); Compound T is l-oxyl-2, 2,6,6,6-tetramethyl-4- (2,3-dihydroxypropoxy) piperidine; Compound U is l-oxyl-2, 2,6,6,6-tetramethyl-4- (carboxymethoxy) piperidine; Compound V is 3-oxyl-l, 2, 2, 4, -pentamethyl-3,4-dihydro-2-methylsulfate. H.-imidazole-1-io; Compound W is 3- (3-benzotriazol-2-yl-5-. Tert.-butyl-4-hydroxy-phenyl) -propionic acid CG20-0568; Compound X is polyethylene glycol of molecular weight 300 (PEO); Compound Y is -4,6-bis (2,4-dimethylphenyl) -2- (4- (3-dodecyloxy * -2-hydroxypropoxy) -2-hydroxyphenyl) -s-triazine (* is the mixture of oxy-isomers) from C12-14) (Tinuvin® 400); Compound Z is 2,2'-dihydroxy-4,4'-dimethoxy-5,5'-disulfobenzophenone disodium salt (Uvinul® 3048); Compound AA is 2,2 '-dihydroxy-, 4'-dimethoxybenzophenone (Uvinul® 3049); Compound BB is diethylenetriaminetetrazidic acid (DTPA); Compound CC is 5,5-dimethyl-l-pyrroline oxide N; The compound DD is N-tert-butyl-a-phenylnitrona; - Compound EE is l-oxyl-2, 2, 6, 6-tetramethyl-4-oxo-piperidine; The compound FF is tris (1-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium citrate); The compound GG is dithiothreitol; The compound HH is 1-thioglycerol; Compound II is 2, 2'-oxidietantiol; The compound JJ is 2, 2, 6, β-tetramethyl-4-acetamidopiperidine; The compound KK is UVINUL® 3000, 2,4-dihydroxybenzophenone; The compound LL is Brightener 28; disodium salt of 4,4'-bis [4-anilino-6- (bis (2-hydroxyethyl) amino-s-triazin-2-yl] amino-2, 2'-stilbendisulfonic acid; the TMHP is 2, 2, 6,6-tetramethyl-4-hydroxypiperidine.

EXAMPLE 1 Accelerated Yellowing with High Intensity Lamps One BTMP sheet was treated with 0.5% -0.1% by weight of Compound A. The sheets treated with Compound A exhibited substantial inhibition to yellowing compared to untreated control sheets as can be observed by the numbers PC Concentration Constant levels as low as 0.1% by weight of Compound A showed effective stabilizing effects.

Example 2 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.50% by weight of various hydroxylamine compounds by the procedure of Example 1. l-hydroxy-2, 2,6,6,6-tetramethyl-l, 2,3,6-tetrahydro-pyridine; l-hydroxy-2, 2,6,6,6-tetramethyl-4-methoxypiperidine; l-hydroxy-2, 2,6,6,6-tetramethyl-4-ethoxypiperidine; l-hydroxy-2, 2,6,6,6-tetramethyl-4-propoxypiperidine; l-hydroxy-2, 2,6,6,6-tetramethyl-4- (2-hydroxy-4-oxapentoxy) piperidine; 4, 4 '- [1,6-hexandiylbis (formylimino)] bis [2, 2, 6, 6-tetramethyl-1-hydroxypiperidine; 2- (8-carboxyoctyl) -4,4-dimethyl-2-octyl-3-hydroxy-oxazolidine; 3, 3-dimethyl-4-hydroxy-l-oxa-4-azaspiro [4.5] decane; 3-aminomethyl-2, 2,5,5-tetramethyl-l-hydroxy-pyrrolidine; 3-carboxy-2, 2, 5, 5-tetramethyl-l-hydroxypyrrolidine; - 4-phenyl-2, 2, 5, 5-tetramethyl-l-hydroxy-3-imidazoline; 4-phenyl-2, 2, 5, 5-tetramethyl-l-hydroxy-3-imidazoline-3-oxide; di-tert-butyl hydroxylamine. Leaves treated with hydroxylamines exhibited substantial inhibition to yellowing compared to untreated control leaves.

EXAMPLE 3 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compounds B, C, D and E. Leaves treated with nitroxides exted substantial intion to yellowing compared to untreated control leaves. Compounds Time in White B D Days PC number 0. 93 2.49 0.88 1.6 2.01 1.2Í 1. 9 5.27 1.89 3.24 4.06 2.49 2. 94 8.46 3.41 5.52 6.73 4.28 3. 93 10.54 4.36 6.89 8.57 5.4 4. 98 12.34 5.36 8.31 10.5 6.53 . 88 13.81 6.11 9.45 11.62 7.74 6. 91 15.55 7.17 11.05 13.17 8.81 7. 98 17.34 8.18 12.5 14.57 10.12 8. 97 19.44 9.33 13.72 16.28 11.32 . 01 20.98 10.1 15.07 17.75 12.21 . 94 22.35 11.01 16.3 19.1 13.16 Example 4 Accelerated Yellowing with High Intensity Lamps. The BTMP sheets were treated with 0.25% by weight of Compound EE. Leaves treated with nitroxides exted substantial intion to yellowing compared to untreated control leaves.

Time in Composite Days EE White PC number 1. 04 1.77 4.53 2. 02 3.77 7.91 3. 06 5.97 11.16 4. 02 7.76 13.72 . 02 9.28 15.47 6. 23 10.49 17.61 6. 98 11.88 18.78 7. 98 13.06 20.09 . 96 16.92 25.25 Example 5 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of each of the following compounds: l-oxyl-2, 2, 6, 6-tetramethyl-l, 2, 3 , 6-tetrahydro-pyridine; l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl-acetate; • l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl-2-ethylhexanoate; l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl stearate; l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl-benzoate; L-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl- (4-tert-butyl) benzoate; bis (1-oxy-1-2-, 2,6,6,6-tetramethylpiperidin-4-yl) -succinate; bis (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -adipate; bis (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -n-butylmalonate; bis (l-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) -phthalate; bis (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -isophthalate; bis (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -terephthalate; bis (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -hexahydroterephthalate; N, N '-bis (1-oxy-2-, 2,6,6-tetramethylpiperidin-4-yl) -adipinamide; N- (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -caprolactam; N- (1-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -dodecyl succinimide; 2,4,6-tris- [N-butyl-N- (l-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) -s-triazine; 4,4'-methylenbis (1-oxy-2-, 2,6,6-tetramethylpiperazin-3-one; tris- (2,2,6,6-tetramethyl-1-oxyl-piperidin-4-yl) phosphite; l-oxyl-2, 2,6,6-tetramethyl-4-methoxypiperidine; l-oxyl-2, 2,6,6-tetramethyl-4-ethoxypiperidine; l-oxyl-2, 2, 6,6-tetramethyl- 4-propoxypiperidine; l-oxyl-2,2,6,6-tetramethyl-4-carboxypiperidine; l-oxyl-2, 2,6,6,6-tetramethyl-4- (2-hydroxy-4-oxa-pentoxy) piperidine; 4, 4 '- [1,6-hexanediylbis (paramilimino)] bis [2, 2, 6, 6-tetramethyl-1-piperdiniloxy; 2- (8-carboxyoctyl) -4,4-dimethyl-2-octyl- 3-oxazolidinyloxy; 3,3-dimethyl-l-oxa-4-azaspiro [4.5) dec-4-yloxy; 3-aminomethyl-2, 2, 5, 5-tetramethyl-l-pyrrolidinyloxy; 3-carboxy-2, 2,5,5-tetramethyl-1-pyrrolidinyloxy; 4-phenyl-2,2,55-tetramethyl-3-imidazolin-1-yloxy; 4-phenyl-2, 2, 5, 5-tetramethyl-3-imidazolin-1-yloxy-3-oxide; di-tert-butyl nitroxide. Leaves treated with nitroxides exted substantial intion to yellowing compared to untreated control leaves.

EXAMPLE 6 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.50% by weight of Compounds A, F, G, H, I and J. The sheets treated with hydroxylamine salts exted substantial intion to yellowing compared to Control sheets not treated.

EXAMPLE 7 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.50% by weight of Compounds K and L. The sheets treated with Compounds K and L of hindered amine hydroxylamine exted substantial intion to yellowing compared to the leaves. control not treated. EXAMPLE 8 Accelerated Yellowing with High Intensity Lamps The BTMP sheets were treated with 0.50% by weight of the M, N and O Compounds. The sheets treated with selected acylated hindered amine hydroxylamine derivatives exted substantial intion to yellowing compared to the leaves. control not treated.

Compounds Time in White M N O Days PC number .82 3.87 2.06 2.02 2.05 2. 72 8.9 5.2Í 4.87 5.13 3. 76 10.88 6.53 6.03 6.42 4. 76 15.59 7.72 7.17 7.62 . 76 14.32 8.92 8.28 8.77 6. 77 16.36 10.42 9.61 10.24 7. 81 18.47 11.97 10.94 11.7 Compounds Time in White M N Days PC number 8. 79 20.15 13.14 12.01 12.86 21.9 14.31 13.08 13.96 . 77 23.5 15.51 14.02 15.16 EXAMPLE 9 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.5% by weight of each of the following: l-acetyl-4-hydroxy-2,2,6,6-tetramethyl-piperidine; l-acetyl-2, 2,6,6,6-tetramethyl-piperidin-4-one; bis (l-acetyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) sebacate. Leaves treated with acylated hindered amine derivatives exhibited substantial inhibition to yellowing compared to untreated control leaves.

EXAMPLE 10 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.50% by weight of Compound P. The sheets treated with Compound P exhibited substantial inhibition to yellowing compared to the untreated control sheets.

Time in White Days Compound P PC Number 0 0 0 .81 3.19 1.66 1.82 5.85 2.68 2.8 8.06 3.76 3.75 10.02 4.64 4.83 12.08 5.50 5.8 13.81 6.28 6.76 15.49 7.21 7.77 16.98 7.90 8.74 18.54 8.9 9.76 20.06 9.63 10.74 21.56 10.47 Example 11 Amarxllamxento Accelerated with High Intensity Lamps BTMP sheets were treated with 0.5% -0.1% by weight of Compound A and 0.5% by weight of Compound Q. The sheets treated with a combination of hydroxylamine and benzophenone UVA exhibited substantial inhibition to yellowing compared to the leaves control not treated.

Concentration of Compound A Time 0.50 0.40 0.30 0.20 0.10 White in Days PC number 1. 05 0.73 0.71 0.93 0.86 5.74 2. 1 2.17 1.63 1.6 2.11 2.02 10.51 .98 ^ 3.05 2.48 2.43 3.12 3.09 13.75 3. 9Í 4.12 3.41 3.39 4.37 4.2 16.67 4. 97 4.95 4.22 4.16 5.39 5.15 18.96 6. 05 5.95 5.18 5.1Í 6.59 6.36 21.42 Example 12 Accelerated Burnishing with High Intensity Lamps The BTMP sheets were treated with 0.25% by weight of Compound A and 0.5% by weight of the UVA R and S compounds. The sheets treated with a combination of hydroxylamine and benzotriazole UVA exhibited substantial inhibition to yellowing compared to untreated control leaves and illustrated the increase in performance when combinations of hydroxylamine and UVA were used.

EXAMPLE 13 Accelerated Ablation with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compounds B, T, U and V and 0.5% by weight of UVA Compound S. The sheets treated with a combination of nitroxide and UVA exhibited substantial inhibition to yellowing compared to untreated control leaves and illustrated the increase in performance when combinations of nitroxide and UVA were used.

EXAMPLE 14 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compounds B, T, U and V and 0.5% by weight of the benzophenone UVA compounds: (2-hydroxy-4-octyloxy) phenyl) -pheni-1-methanone; (2-hydroxy-4-methoxy-phenyl) -phenyl-methanone; (4-dodecyloxy-2-hydroxy-phenyl) -phenyl-1-methanone; (2-hydroxy-4-methoxy-phenyl) - (2-hydroxy-phenyl) -methanone; bis- (2-hydroxy-4-methoxy-phenyl) -methanone; bis- (2,4-dihydroxy-phenyl) -methanone; [3- (3-benzoyl-2-hydroxy-6-methoxy-benzyl) -2-hydroxy-methoxy-4-methoxy-phenyl] -phenyl-1-methanone; 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid; sulfonate 2,2'-dihydroxy-4, '-dimethoxybenzophenone-5, 5'-disodium.

Leaves treated with a combination of nitroxide and UVA exhibited substantial inhibition to yellowing compared to untreated control leaves and illustrated the increase in performance when combinations of nitroxide and UVA were used.

EXAMPLE 15 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compounds B, T, U and V and 0.5% by weight of the benzotriazole UVA compounds: (a) 5-chloro-2- (2-hydroxy-3,5-di-tert-butylphenyl) -2H-benzotriazole; (b) 2- (2-hydroxy-3,5-di-tert-butylphenyl) -2H-benzotriazole; (c) 2- (2-hydroxy-3,5-di-tert-amylphenyl) -2H-benzotriazole; (d) 2- (2-hydroxy-3,5-di-a-cumylphenyl) -2H-benzotriazole; (f) 2- (2-hydroxy-3-a-cumyl-5-tert-octylphenyl) -2H-benzotriazole; (g) monosodium salt of 3- (2H-benzotriazol-2-yl) -4-hydroxy-5- (1-methylpropyl) -benzenesulfonic acid; (h) acid and sodium salt of 3-tert-butyl-4-hydroxy-5- (2H-benzotriazol-2-yl) -hydrocinnamic acid; (i) 3-tert-butyl-4-hydroxy-5- (2H-benzotriazol-2-yl) -hydrocinnamate of 12-hydroxy-3,6,9-trioxadodecyl; (j) octyl 3-tert-butyl-4-hydroxy-5- (2H-benzotriazol-2-yl) -hydrocinnamate; (k) 4, 6-bis (2, -dimethylphenyl) -2- (4- (3-dodecyloxy * -2-hydroxypropoxy) -2-hydroxyphenyl) -s-triazine (* is the mixture of oxy isomers of C? 2_? 4); (1) 4, 6-bis (2,4-dimethylphenyl) -2- (4-octyloxy-2-hydroxyphenyl) -s-triazine; (m) 2,4-dihydroxybenzophenone; (n) 2, 2 ', 4, 4'-tetrahydroxy-5,5'-disulfobenzophenone disodium salt; (o) 2-hydroxy-4-octyl ibenzophenone; (p) 2-hydroxy-4-dodecyloxybenzophenone; (q) .2, 4-dihydroxybenzophenone; (r) 2, 2 ', 4, 4' -tetrahydroxybenzophenone; (s) 4-aminobenzoic acid; (t) 2,3-dihydroxypropyl-4-aminobenzoic acid; (u) 3- (4-imidazolyl) acrylic acid; (v) 2-phenyl-5-benzimidazole sulfonic acid; () N, N, N-trimethyl-α- (2-oxo-3-bonylidene) -p-toluidinyl sulfate methyl; (x) sodium salt of 5-benzoyl-4-hydroxy-2-methoxybenzenesulfonic acid; (y) 3- (4-benzoyl-3-hydroxyphenoxy) -2-hydroxy-N, N, N-trimethyl-1-propanamino chloride; (z) 3- [4- (2H-benzotriazol-2-yl) -3-hydroxyphenoxy) -2-hydroxy-N, N, N-trimethyl-1-propanaminium chloride; (aa) 2- (2-hydroxy-5-methylphenyl) -2H-benzotriazole.

EXAMPLE 16 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compounds B, T, U and V and 0.5% by weight of the UVA triazine compounds: 4, 6-bis (2, 4 -dimethylphenyl) -2- (4- (3-dodecyloxy * -2-hydroxypropoxy) -2-hydroxyphenyl) -s-triazine (* mixture of C12-14 oxy isomers) (Tinuvin 400); 4, 6-bis (2,4-dimethylphenyl) -2- (2-hydroxy-4-octyloxy-phenyl) -s-triazine; 2,4,6-tris (4- (3-dodecyloxy * -2-hydroxypropoxy) -2-hydroxyphenyl) -s-triazine (* mixture of oxy isomers of C? 2_?); 2, 4-bis (4- (3-dodecyloxy) -2-hydroxypropoxy) -6- (2,4-dimethylphenyl) -s-triazine (* mixture of oxy isomers of C? 2? 4): The leaves treated with a combination of nitroxide and UVA exhibited substantial inhibition to yellowing compared to untreated control leaves and illustrated the increase in performance when combinations of nitroxide and UVA were used.

Example 17 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compounds B, T, U and V and 0.5% by weight of the cinnamate compounds UVA: 2-cyano-3 ethyl ester , 3-diphenyl-2-propenoic; 2-cyano-3, 3-diphenyl-2-propenoic acid 2-ethylhexyl ester; 3- (4-methoxyphenyl) -2-propenoic acid 2-ethylhexyl ester. Leaves treated with a combination of nitroxide and UVA exhibited substantial inhibition to yellowing compared to untreated control leaves and illustrated the increase in performance when combinations of nitroxide and UVA were used Example 18 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of the Compounds B, T, U and V and 0.5% by weight of the oxalanilide UVA compounds; N- (2-ethoxyphenyl) -Ni- (4-isododecylphenyl) -ethanediamide; N- (2-ethoxyphenyl) -N '- (2-ethylphenyl) -ethandiamide.

EXAMPLE 19 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compounds B, T, U and V and 0.5% by weight of the UVA compounds of salicylate: 2-hydroxy-benzoic acid phenyl ester; 2- (1, 1-dimethylethyl) phenyl ester of 2-hydroxy-benzoic acid; 2-hydroxy-benzoic acid 2-ethylhexyl ester; 4-isopropylbenzyl ester of 2-hydroxy-benzoic acid; 3, 3, 5-trimethylcyclohexyl ester of 2-hydroxy-benzoic acid. Leaves treated with a combination of nitroxide and UVA exhibited substantial inhibition to yellowing compared to untreated control leaves and illustrated the increase in performance when combinations of nitroxide and UVA were used.

EXAMPLE 20 Accelerated Yellowing with High Intensity Lamps The BTMP sheets were treated with 0.25% by weight of Compounds B, T, U and V and 0.5% by weight of the UVA formamidine UVA compounds: ethyl ester of 4- [[ (methylphenyl-amino) methylene] amino) -benzoic acid; ethyl 4- [[(ethylphenylamino) methylene) amino) -benzoic acid ethyl ester. Leaves treated with a combination of nitroxide and UVA exhibited substantial inhibition to yellowing compared to untreated control leaves and illustrated the increase in performance when combinations of nitroxide and UVA were used.

Example 21 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compounds B, T, U and V and 0.5% by weight of the UVA compounds of 4-hydroxybenzoate: hexadecyl ester of acid 3, 5 bis (1,1-dimethylethyl) -4-hydroxy-benzoic acid; 2, 4-bis (1,1-dimethylethyl) phenyl ester of 3,5-bis (1,1-dimethylethyl) -4-hydroxy-benzoic acid.

EXAMPLE 22 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compounds B, T, U and V and 0.5% by weight of the UVA compounds of 4-aminobenzoate: 4-aminobenzoic acid; 2, 3-dihydroxypropyl-4-aminobenzoate; 2-ethylhexyl 4-dimethylaminobenzoate; 4- [Ethyl bis (2-hydroxypropyl) amino] benzoate. The leaves treated with a combination of nitroxide and UVA exhibited substantial inhibition to yellowing compared to the untreated control sheets and illustrated the effect on performance when combinations of nitroxide and UVA were used.

EXAMPLE 23 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.50% by weight of Compounds A, F, G, H, I and J and 0.5% of Compound R. Sheets treated with hydroxylamine and UVA salts exhibited substantial inhibition to yellowing compared to untreated control leaves.

Time at 0.5% of G 0.5% of H 0.5% of F 0.5% of I 0.5% of J 0.5% of White A Days 0.5% of R 0.5% of R 0.5% of R 0.5% of R 0.5% of R 0.5% of R PC number .76 0.57 -0.14 0.06 0.16 -0.18 -0.55 3.51 1. 85 0.96 0.02 0.32 0.33 -0.49 6.43 2. 81 1.55 0.17 0.63 0.57 0.25 -0.33 8.77 3. 76 1.94 0.38 0.9 0.81 0.48 -0.21 10.89 4. 82 2.52 0.57 1.24 1.01 0.66 -0.06 12. 5.8 2.89 0.68 1.49 1.17 0.87 0.05 14.7 6. 82 3.27 0.81 1.64 1.38 1.06 0.14 16.03 7. 77 3.84 1.05 1.59 1.29 0.3 17.33 8. 76 4.05 1.16 2.17 1.75 1.42 0.43 18.22 9. 81 4.77 1.38 2.46 1.98 1.67 0.57 19.27 . 88 5.11 1.53 2.69 2.27 1.86 0.69 20.18 11. 82 5.51 1.7 2.97 2.45 2.08 0.84 21.03 12. 78 5.77 1.89 3.13 2.7 2.25 0.92 22.03 Example 24 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.50% by weight of Compounds K and L and 0.5% by weight of Compound S. Leaves treated with derivatives of the adduct of Michael of hindered amine hydroxylamine and a UVA exhibited substantial inhibition to yellowing compared to untreated control leaves.

Time in 0.5% of K 0.5% of L 0.5% of S White Days 0.5% of S 0.5% of S PC number 0 0 0 0. 81 0.04 0.29 3.03 1. 82 0.51 0.87 0.89 5.78 , 2.8 1.08 1.1 1.47 8.11 3. 75 1.56 1.65 2.14 10.21 4. 83 2.04 2.25 2.83 12.33 . 8 2.64 2.76 3.56 14.13 6. 76 2.9Í 3.23 4.1Í 15.6 Time in 0.5% of K 0.5% of L 0.5% of S White Days 0.5% of S 0.5% of S PC number 7. 77 3.54 3. 82 4. 93 17.45 8. 74 3.97 4. 45 5. 7 18.98 9. 75 4.6 5.1S 6.5 30.34 . 74 5.07 5.85 7.39 21.91 Example 25 Accelerated Yellowing with High Intensity Lamps The BTMP sheets were treated with 0.50% by weight of the M, N and O Compounds and 0.5% by weight of the UVA Compound. The sheets treated with selected acylated hydroxylamine hindered amine derivatives and the UVA exhibited substantial inhibition to yellowing compared to untreated control leaves.

Time in 0.5% of M 0.5% of N 0.5% of O 0.5% of White Days 0.5% of W 0.5% of W 0.5% of W PC Number Time in 0.5% of M 0.5% of N 0.5% of O 0.5% of W White Days 0.5% of W 0.5% of W 0.5% of W PC number .82 0.59 0.46 0.51 .79 3.87 2. 72 1.84 1.46 1.77 2.25 8.9 3. 76 2.43 1.91 2.46 2.90 10.88 4. 76 3.09 2.34 3.12 3.52 12.59 . 76 3.84 2.9 3.87 4.32 14.32 6. 77 4.75 3.59 4.72 5.12 16.36 7. 81 5.7 4.37 5.68 6.09 18.47 8. 79 6.55 4.98 6.46 6.86 20.15 . 0 7.43 5.45 7.37 7.7 21.9 . 77 8.28 6.19 8.28 8.64 23.5 Example 26 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.50% by weight of Compound P and 0.5% of Compound S. The sheets treated with Compound P in combination with a UVA exhibited substantial inhibition to yellowing compared to the control sheets not treated.

Time in Days 0.5% of P 0.5% of S White 0.5% of S PC number 0. 81 0.06 0.29 3.03 1. 82 0.46 0.89 5.7Í 2. 8 0.95 1.47 .11 3. 75 1.37 2.14 10.21 4. 83 1.74 2.83 12.33 . 8 2.13 3.56 14.13 6. 76 2.5 4. lí 15.6 7. 77 2.95 4.93 17.45 8. 74 3.42 5.7 18.98 Example 27 Accelerated Locking with High Intensity Lamps BTMP sheets were treated with 0.5% Compound S and 0.5% by weight of: l-acetyl-4-Hydroxy-2, 2, 6, 6- tetramethyl piperidine; l-acetyl-2, 2,6,6,6-tetramethyl-piperidin-4-one; bis (l-acetyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) sebacate. The sheets treated with acylated hindered amine derivatives in combination with a UVA exhibited substantial inhibition to yellowing compared to untreated control leaves.

Example 28 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of the Compound A, 0.5% of Compound W and 0.5% of Compound X. The leaves treated with hydroxylamine, UVA and PEO exhibited substantial inhibition to yellowing compared to untreated control leaves.

Time at 0.25% of A 0.25% of A 0.25% of A White Days 0.5% of W 0.5% of W 0.5% of X PC Number Time in 0.25% of A 0.25% of A 0.25% of A White Days 0.5% of W 0.5% of W 0.5% of X PC number 0. 77 0.97 0.06 0.03 3.74 1. 85 '1.86 0.28 0.27 7.25 2. 78 2.85 0.49 0.46 10.43 . 84 6.42 1.54 1.48 19.5 6. 93 7.85 2 1.98 21.69 8 8.82 2.34 2.26 23.25 Example 29 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compound A, 0.5% of Compounds Y, Z and AA and 0.5% of Compound X. The sheets treated with hydroxylamine, UVA and PEO exhibited substantial inhibition to yellowing compared to untreated control leaves.

Time 0.25% of A 0.25% of A 0.25% of A 0.25% of A 0.25% of A 0.25% of A 0.25% of A White in Days 0.5% of Y 0.5% of Y 0.5% of Z 0.5% of Z 0.5% of AA 0.5% of AA 0.5% of X 0.5% of X 0.5% of X PC Number 0. 84 1.22 0.34 0.27 1.11 1.09 0.33 0.22 1.77 1.94 0.64 0.45 1.32 1.54 0.53 0.43 7.73 4. 88 5.48 2.41 1.86 3.87 4.9 2.39 1.67 18.19 . 92 6.9 3.11 2.46 4.82 5.82 3.01 2.09 21.03 6. 99 7.64 3.64 2.81 5.34 6.51 3.48 2.41 22.93 EXAMPLE 30 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.5% by weight of Compound 0, 0.25% by weight of Compound W and 0.25% by weight of Compound BB. The leaves treated with hydroxylamine, UVA and metal chelating agent exhibited substantial inhibition to yellowing compared to untreated control leaves.

EXAMPLE 31 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.25% by weight of Compound B, 0.5% by weight of Compound Q and 1.0% by weight of Compound CC or DD. The results show the effectiveness of nitrones alone, nitrones with a UVA, nitrones with a nitroxide and especially nitrona with a UVA and a nitroxide in the inhibition to yellowing compared to the untreated control leaves.

Example 32 Accelerated Yellowing with High Intensity Lamps BTMP sheets were treated with 0.5% by weight of Compound Q and 0.25% by weight of Compounds D, B, O, E and A. The results show the superiority of hydroxylamines over nitroxides in the maintenance of the great brilliance of the paper after the application and during the exhibition.

Time in 0.5% of Q 0.5% of Q 0.5% of Q 0.5% of Q 0.5% of Q 0.5% of Q White Days 0.25% of D 0.25% of B 0.25% of C 0.25% of E 0.25% of A ISO brightness 0 78.83 76.96 76.75 78.24 79.85 79.75 78.6 0. 75 77.45 77.53 77.15 76.21 78.91 75.36 68.43 1. 74 75.77 77.16 76.66 74.36 72.22 62.89 2. 74 73.61 76.59 75.89 72.1 77.7 68.93 58.54 3. 75 71.95 75.96 75.21 70.14 77.12 66.09 55.41 6. 81 65.96 72.86 72.02 64.11 74.09 58.58 49.29 Example 33 Accelerated Yellowing with High Intensity Lamps Additives were added with a sizing treatment on 100% BTMP paper coated with 2 g / m2 / side using a Pilot Liquid Application System from Bonnier Technology Group Inc. (LAS System) . This consists of a hydrophilic roller, soft dosing roller, soft support roller and sizing tray. A film of sizing solution is drawn through the point of contact between the dosing rollers on the hydrophilic roller. The paper is finished when it runs between the hydrophilic roller and the support roller.

Formulation of coating based on starch: Blank Time Only Apresto Apresto Days sizing 0.36% of G 0.24% of G 0.84% of S 0.55% of S PC number 1. 01 4.69 4.45 0.59 0.95 1. 85 6.78 6.51 0.79 1.53 2. 9 8.95 8.98 1.04 1.91 Blank Time Only Apresto Apresto Days sizing 0.36% of G 0.24% of G 0.84% of S 0.55% of S PC number 4. .1 11.61 10.68 1.41 2.51 4. 8 13.29 12.12 1.66 2.84 . 81 14.75 13.98 1.89 3.23 6. 77 16.15 15.26 2.04 3.66 7. 82 17.16 16.27 2.42 3.85 8. 78 18.17 17.19 2.45 4.22 9. 89 19.28 18.19 2.66 4.42 . 92 21.11 19.45 3.02 4.97 11. 81 20.8 20.31 3.18 5.37 12. 81 21.98 21.18 3.55 5.58 13. 79 22.68 22.16 3.65 5.99 Example 34 Accelerated Yellowing with High Intensity Lamps Additives were added with a sizing treatment on 100% BTMP paper coated with 2 g / m2 / side using a Pilot Liquid Application System from Bonnier Technology Group Inc. (LAS System) . This consists of a hydrophilic roller, soft dosing roller, soft support roller and sizing tray. A film of sizing solution is drawn through the point of contact between the dosing rollers on the hydrophilic roller. The paper is finished when it runs between the hydrophilic roller and the support roller. 100% BTMP 4 g / m2 / side was coated with pigments based on the coating formulation: Time in White Days Only Coating Coating Coating coating 0.13% of G 0.4% of G 0.19% of G 0.4% of S 0.74% of S 0.48% of S PC number 4. 46 3.66 0.65 0.16 0.7 1. 83 7.16 5.15 1.03 0.31 1.15 2. 91 8.54 6.7 1.21 0.43 1.41 4. 11 11.04 8.47 1.53 0.59 1.61 4. 8 13.08 10.55 2.1 0.59 1.96 . 82 14.25 11.19 2.02 0.8 2.16 6. 78 16.01 12.44 2.39 0.92 2.54 7. 83 17.45 13.67 2.61 1.02 2.7 18.09 14. Oí 2.6E 0.98 2.86 9. 9 18.9 14.8í 2.95 1.09 3.02 . 94 20.19 15.67 3.12 1.21 3.2Í 11. 81 21.38 16.68 3.59 1.31 3.57 Time in White Days Only Coating Coating Coating coating 0.13% of G 0.4% of G 0.19% of G 0.4% of S 0.74% of S 0.48% of S PC number 12. 82 22.25 17.57 3.5S 1.46 3.75 13. 8 23.26 18.21 3.83 1.59 4.27 Example 35 Using the accelerated test method, BTMP hand towels containing various combinations of 0.25% by weight of a hindered amine, 0.5% by weight of a UV absorber of s-triazine and / or 0.50% by weight of polymeric additives for their effectiveness in preventing yellowing. The data is presented in the table below.

Table for Example 35 Table Names Days - PC Numbers - 1.14 2.56 1.937 2.557 .1627 .2688 .6753 2.754 1.833 2.15 1.927 5.319 1. 97 4.40 3,214 4,042 .4481 .5323 1,249 4,484 2,987 3,643 3,219 8,064 Table for Example 35 (continued) Table Names Days-PC Numbers- 2.98 6.20 4.546 5.752 .7997 .9261 1.873 6.326 4.360 5.338 4.778 10.99 4. 06 9.04 6,210 7,590 1,287 1,460 2,742 8,403 5,855 6,964 6,352 13.95 . 03 11.50 8.252 9.841 2.087 2.228 3.957 10.64 7.498 9.008 8.229 17.20 . 98 12.74 9.404 11.19 2.466 2.582 4.593 12.16 8.572 10.13 9.295 19.25 6. 96 14.25 10.54 12.58 2.747 2.889 5.203 13.25 9.360 11.04 10.18 21.01 7. 98 16.48 12.23 14.65 3.541 3.792 6.425 15.24 11.07 12.66 11.74 23.52 A contains the UV absorber TINUVIN® 400 / Compound Y. B contains the UV absorber TINUVIN® 400 and the PEO polymer. C contains the TINUVIN® 400 UV absorber and the PTHF polymer. D contains Compound B, hindered amine nitroxide, the TINUVIN® 400 UV absorber and the PEO polymer. E contains Compound B, hindered amine nitroxide, the TINUVIN® 400 UV absorber and the PTHF polymer.

F contains Compound B, hindered amine nitroxide and the UV absorber TINUVIN® 400. G contains Compound JJ hindered amine nitroxide and UV absorber TINUVIN® 400. H contains Compound B, hindered amine nitroxide. I contains the hindered amine TEMPO. J contains the hindered amine K is the control containing non-stabilizing additives. As evidenced by the inspection of the data in the table, in order from the best to the worst D = E > F > H > J > B > I > C > G > A »K. These data show that the combination of a nitroxide, a UV absorber and a polymeric co-additive provides the best protection against yellowing after 8 days of exposure.

Example 36 Using the accelerated test method, BTMP hand towels containing various combinations of 0.25% by weight of a hindered amine, 0.5% by weight of a benzophenone UV absorber and / or 0.5% by weight of polymeric additives were compared. for its effectiveness in the prevention of yellowing. The data is presented in the table below.

Table for Example 36: Table 7A Names Days-PC Numbers 822 1.89 1.545 1.784 .0633, 0881 .0211 1.574 .9791 3.826 1. 87 3.41 2.733 3.241 .3018 .2650 .1786 2.911 2.048 6.978 2. 91 5.00 4.254 4.939.6705.5656.44648 4.489 3.249 10.19 3. 87 6.96 6.038 6.875 1.371 1.183 1.100 6.319 4.770 134. 83 8.59 7.534 8.702 1.808 1.484 1.334 7.759 5.903 16.43 . 81 9.93 8.690 9.944 2.031 1.658 1.483 8.810 6.785 18.26 6. 83 11.80 10.37 11.67 2.704 2.217 2.079 10.34 7.968 21.39 7. 82 13.59 11.99 13.49 3.2? 2,653 2,559 11.53 9,169 23.91 A contains UV absorber UNIVIL ^ 3000. B contains UNIVIL® 3000 UV absorber and PEO polymer. C contains UNIVIL® 3000 UV absorber and PTHF polymer.

D contains Compound B, hindered amine nitroxide, UNIVIL® 3000 UV absorber and PEO polymer. E contains Compound B, hindered amine nitroxide, UNIVIL® 3000 UV absorber and PTHF polymer. F contains Compound B, hindered amine nitroxide and the UV absorber UNIVIL® 3000. G contains the hindered amine compound JJ and the UV absorber UNIVIL® 3000, H contains Compound B, hindered amine nitroxide. I is the control that contains non-stabilizing additives. As attested by the inspection of the data in the table, in order from the best to the worst F > E > D > HG > B > C == A »I. These data show that the combination of a nitroxide and a co-additive of the benzophenone UV absorber provide the best protection against yellowing after 8 days of exposure.

EXAMPLE 37 Using the accelerated test method, BTMP hand towels containing various combinations of 0.25% by weight of a hindered amine, 0.5% by weight of a benzophenone UV absorber and / or 0.5% by weight of polymeric additives were compared. for its effectiveness in the prevention of yellowing. The data is presented in the table below.

Table for Example 37 Table A B D Name (s Days PC Numbers 1. 01 3.60 3.621 1.383 1.764 3.454 1.221 5.048 2. 09 6.42 6,027 2,412 3,200 5,842 2,501 8,506 3. 05 9.03 8,646 3,845 5,012 8,433 4,123 12.04 4. 01 11.60 11.21 4.957 6.360 10.54 5.245 15.26 4. 98 13.19 13.01 4.412 7.396 11.92 6.115 17.50 6. 01 15.49 15.26 6.252 9.151 14.34 7.611 20.59 7. 00 17.75 17.67 7.653 10.83 16.64 8.926 23.32 A contains the UV absorber UVINUL® 3048; Compound Z.

B contains UVINUL® 3048 UV absorber and PEO polymer. C contains hindered amine nitroxide Compound F, UVINUL® 3048 UV absorber and PEO polymer. D contains Compound B, hindered amine nitroxide and the UV absorber UVINUL® 3048. E contains the hindered amine compound JJ and the UV absorber UVINUL® 3048. F contains Compound B, hindered amine nitroxide. G is the control containing non-stabilizing additives. As witness the inspection of the data in the table, in order of the best to the worst OF > D > E > B = A = G. These data show that the combination of a nitroxide, a benzophenone UV absorber and a polymeric co-additive provides the best protection against yellowing after 7 days of exposure. The tables in Examples 38 to 48 all show PC Numbers.

Example 38 Using the accelerated test method, BTMP hand towels containing various combinations of 1% by weight, a hindered amine, 0.5% by weight of a benzotriazole UV absorber and / or 0.5% by weight of polymeric additives were compared by its effectiveness in the prevention of yellowing. The data is presented in the table below.

Table for Example 38 Days A B D H .0 1. 17 1.62 0.91 1.13 1.4 2.26 2.85 3.35 3.42 . 1 2.11 2.24 3.69 4.42 5.07 5.26 2. 98 4.23 2.62 3.15 3.14 5.21 5.9 6.75 7.22 . 67 3.58 4.32 4.44 7.26 7.81 9.09 9.87 . 01 6.73 4.28 5.2 5.13 8.84 9.08 10.48 11.72 . 99 7.73 5.01 5.98 6.08 10.64 10.49 12.11 13.69 6. 94 8.75 5.74 6.79 6.75 11.91 11.42 13.29 14.95 7. 98 9.62 6.46 7.55 7.48 13.25 12.44 14.36 16.41 99 10.27 6.99 8.14 8.2 14.63 13.54 15.66 18.25 9. 98 10.6 7.36 8.56 9.03 16.1 14.56 16.81 19.97 11. 01 11.34 7.96 9.27 9.93 17.85 15.9 18.37 21.84 12. 01 13. 4 í 9. 17 10. 27 10. 57 19. 04 16. 65 19. 19 23. 03 A contains the hindered amine TMHP, the UV absorber TINÜVIN® 1130 and the PEO polymer. B contains the hindered amine TMHP, the UV absorber TINUVIN® 1130 and the polymer PTHF. C contains the hindered amine TMHP and the UV absorber TINUVIN® 1130. D contains the hindered amine compound G and the UV absorber TINUVIN® 1130. E contains the UV absorber TINUVIN® 1130. F contains the hindered amine TMHP. Or it contains the hindered amine compound JJ. H is the control that contains non-stabilizing additives. As witness the inspection of the data in the table, in order of the best to the worst D > B > C > F > A > E > G > H. These data show that the combination of a hindered amine and a benzophenone UV absorber provide the best protection against yellowing after 12 days of exposure.

Example 39 Using the test method at ambient conditions, BTMP hand towels containing 1%, 0.6% or 0.1% by weight of the hindered amine nitroxide Compound F, 2% by weight of the benzotriazole UV absorber TINUVIN® 328 and 1 % by weight of the PEO polymer, were compared for their effectiveness to prevent yellowing. The data is presented in the table below.

Table for example 39 Days p51a p51b p51c p51d p51e 0. 00 0.00 0.00 0.00 0.00 0. 10 -0.08 -0.37 -0.24 -0.21 0 54 -0. 18 -0.84 -0.64 -0.54 1 . 07 -0. 04 -0.67 -0.47 -0.30 1 . 00 -0. 12 -0.83 -0.63 -0.42 1. 37 -0.04 -0.73 -0.50 -0.32 , 11 1.70 -0.10 -0.97 -0.67 -0.44 13 2.05 -0.08 -0.93 -0.61 -0.40 2.33 -0.13 -1.09 -0.73 -0.46 29 4.29 0.02 -1.12 -0.67 -0.20 40 5.86 0.00 -1.16 -0.69 -0.13 Table for example 39 (continued) Days p51a p51b p51c p51d p51e 55 7.52 0.03 -1.12 -0.60 0.18 59 7.88 0.02 -1.16 -0.60 0.22 66 8.83 0.05 -1.12 -0.55 0.39 69 9.05 0.01- 1.21 -0.67 0.35 73 9.56 0.09 -1.10 -0.53 0.49 80 10.48 0.14 -1.01 -0.44 0.64 87 10.91 0.10 -1.12 -0.56 0.55 94 12.11 0.28 -0.91 -0.37 0.83 111 13.38 0.32 -0.86 -0.29 1.01 122 14.71 0.52 -0.67 -0.10 1.32 129 14.60 0.37 -0.79 -0.19 1.38 136 15.92 0.50 -0.60 0.17 1.77 143 16.20 0.58 -0.47 0.28 1.99 150 16.65 0.52 - 0.52 0.26 2.06 157 17.40 0.61 -0.40 0.34 2.16 Table for example 39 (continued) Days p51a p51b p51c p51d p51e 164 18.08 0.67 -0.31 0.40 2.41 171 19.54 0.75 -0.13 0.58 2.82 178 19.98 0.89 -0.09 0.63 3.01 185 20.39 0.90 -0.07 0.69 3.23 . 70 0.83 -0.02 0.70 3.39 191 21.64 0.92 -0.12 0.66 3.41 199 22.11 0.85 -0.10 0.70 3.52 206 22.94 0.97 -0.02 0.75 3.71 213 23.59 0.91 0.03 0.82 3.82 220 24.34 0.95 -0.02 0.81 3.90 A is the control that contains non-stabilizing additives. B is a control, which is a Kraft hand towel. C contains 1% of the nitroxide. D contains 0.6% of the nitroxide. E contains 0.1% of the nitroxide.

As evidenced by the inspection of the data in the table, in order from best to worst C = D = B > E > "TO. These data show that nitroxide provides resistance to yellowing, in particular at le of 0.6 and 1% by weight which make the color after 220 days of exposure equal to that obtained with Kraft paper. Therefore at a leof 0.1%, the nitroxide provides very good resistance to yellowing.

Example 40 Using the accelerated test method; the test method to environmental conditions; and aging in the dark, BTMP hand towels containing 0.25%, 0.2%, 0.15%, 0.1% or 0.05% by weight of hindered amine nitroxide Compound F were compared for their effectiveness in preventing yellowing. The data are presented respecti in the three tables, below.

Accelerated Test Method Time b C d 0.00 0.00 0.00 0.00 0.00 0.00 0.00 24. 33 2.27 2.55 3.16 3.46 3.65 5.15 48. 50 4.17 4.52 5.46 6.05 6.29 8.60 Accelerated Test Method (continued) Time b C 73.25 5.71 6.18 7.46 8.05 8.62 11.65 97. 00 7.42 7.94 9.39 10.34 10.97 14.68 121. 50 9.00 9.57 11.42 12.57 13.17 17.34 144. 50 10.56 11.25 13.32 14.53 15.36 20.05 168. 25 12.04 12.84 15.08 16.52 17.39 22.57 Test Method to Environmental Conditions Time a b C 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3. 02 0.39 0.21 0.39 0.49 0.44 0.80 . 01 1.00 0.63 1.01 1.23 1.27 2.04 17. 00 1.33 0.90 1.44 1.71 1.82 3.01 31. 03 1.97 1.44 2.43 2.88 3.09 5.04 38. 06 2.71 1.95 3.1Í 3.73 4.04 6.34 4. 5.15 -3.24 2.50 3.84 4.48 4.80 7.33 52. 15 3.59 2.7 '4.22 4.94 5.37 8.00 Test Method for Environmental Conditions (continued) Time b 55.02 3.60 2.72 4.22 4.99 5.49 8.21 62. 02 4.31 3.28 5.04 5.91 6.36 9.28 66. 00 4.49 3.35 5.27 6.03 6.63 9.7Í Test Method of Aging in the Dark Time d 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3. 06 0.18 0.12 0.16 0.19 0.17 0.18 . 04 0.23 0.18 0.21 0.23 0.22 21.02 0.16 0.13 0.16 0.19 0.19 0.31 24. 17 0.23 0.18 0.21 0.26 0.25 0.41 38. 16 0.16 0.12 0.15 0.21 0.23 0.48 45. 15 0.21 0.17 0.21 0.27 0.28 0.57 52. 01 0.20 0.15 0.19 0.25 0.26 0.58 62. 96 0.20 0.15 0.21 0.27 0.28 0.67 A contains 0.25% nitroxide. B contains 0.2% nitroxide. C contains 0.15% of the nitroxide. D contains 0.1% of the nitroxide. E contains 0.05% nitroxide. F is a control that does not contain a stabilizing additive. During the accelerated photoaging, the inspection of the data in the table shows in order from the best to the worst A > B > C > D > E > F. These data show that nitroxide provides resistance to yellowing after 168 hours of accelerated photoaging. During photoaging at environmental conditions, the inspection of the data in the table shows in order from the best to the worst B > A > C > D > E > > F. These data show that nitroxide provides resistance to yellowing after 66 days of photoaging at ambient conditions. During aging in the dark, the inspection of the data in the table shows in order from the best to the worst B > C > A > D > E > > F. These data show that nitroxide provides resistance to yellowing after 63 days of aging in the dark.

Example 41 Using the accelerated test method; the test method to environmental conditions; and aging in the dark, BTMP hand towels containing 0.25% by weight hindered amine nitroxide Compound F and 1%, 0.5%, 0.25%, 0.2% or 0.1% by weight of the benzotriazole UV absorber TINUVIN® 1130 They were compared for their effectiveness in preventing yellowing. The data are presented respecti in the three tables, below.

Time B 0. 00 0.00 0.00 0.00 0.00 0.00 0.00 24. 50 0.2Í 0.53 1.14 1.30 5.39 49. 25 0.57 0.93 1.96 2.35 3.35 8.92 72. 55 0.86 1.46 2.84 3.44 4.83 12.23 97. 50 1.20 1.92 3.66 4.57 6.35 15.14 120. 50 1.66 2.54 4.72 5.87 7.97 18.18 144. 25 2.02 3.06 5.56 6.98 9.39 20.82 168. 50 2.57 3.73 6.71 8.34 11.05 23.47 Test Method for Environmental Conditions Time a B 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2. 02 0.09 -0.03 0.03 • 0.02 0.00 0.41 9. 01 0.42 0.26 0.42 0.36 0.49 1.75 16. 00 0.48 0.22 0.45 0.51 0.72 2.75 23. 02 0.58 0.38 0.73 0.79 1.05 3.90 . 05 0.64 0.43 0.95 0.99 1.31 4.79 37. 07 0.94 0.71 1.34 1.41 1.84 6.17 44. 15 1.11 0.96 1.72 1.76 2.27 7.26 51. 15 1.20 1.04 1.87 1.94 2.55 7.98 54. 03 1.31 1.09 1.95 1.96 2.54 .27 61. 02 1.49 1.29 2.35 2.35 3.04 9.29 64. 98 1.44 1.33 2.43 2.38 3.14 9.73 Test Method of Aging in the Darkness Time a B 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Test Method for Aging in the Dark (continued) Time a B d 2. 06 0.05 0.02 -0.01 -0.01 0.00 0.02 9. 04 0.12 0.10 0.05 0.06 0.08 0.15 . 02 0.05 0.01 -0.03 -0.03 0.00 0.13 23. 17 0.15 0.07 0.03 0.06 0.05 0.21 -17 0.06 0.00 -0.04 -0.05 -0.03 0.20 37. 17 0.10 0.00 -0.02 -0.04 0.00 0.26 44. 15 0.13 0.08 0.00 0.03 0.06 0.33 51. 06 0.15 0.03 -0.01 0.00 0.04 0.37 61. 96 0.14 0.01 -0.01 -0.01 0.05 0.43 79. 06 0.30 0.07 0.08 0.01 0.13 0.51 A contains 1% of the UV absorber. B contains 0.5% of the UV absorber. C contains 0.25% of the UV absorber. D contains 0.2% of the UV absorber. E contains 0.1% of the UV absorber.

F is a control that does not contain a stabilizing additive. During accelerated photoaging, the inspection of the data in the table shows in order from best to worst A > B > G > D > E »F. These data show that the more UV absorbing nitroxide provides resistance to yellowing after 168 hours of accelerated photoaging. - During the photoaging to environmental conditions, the inspection of the data in the table shows in order of the - best to worst B > A > OD > E »F. These data show that the most UV-absorbing nitroxide provides resistance to yellowing after 65 days of photoaging at ambient conditions. During aging in the dark, the inspection of the data in the table shows in order from the best to the worst D > B > OE > A > F. These data show that the more UV absorbing nitroxide provides resistance to yellowing after 79 days of aging in the dark, but that in the dark the UV absorber is much less critical for its effectiveness.

Example 42 Using the accelerated test method; the test method to environmental conditions; and aging in the dark, the BTMP hand towels containing 0.25% by weight of Compound B, hindered amine nitroxide and 1%, 0.75%, 0.5%, 0.25% or 0.1% by weight of the PTHF polymer were compared for their efficacy in the prevention of yellow fever. The data are presented respectively in the three tables, below.

Accelerated Test Method Time d 0. 00 0.00 0.00 0.00 0.00 0.00 0.00 . 00 1.42 1.08 1.50 1.55 1.57 4.56 48. 75 2.41 1.95 2.64 2.82 2.86 7.55 73. 25 3.63 3.07 4.04 4.37 4.46 11.08 96. 25 4.88 4.12 5.3Í 5.7Í 5.95 14.07 120. 00 5.90 5.14 6.62 7.20 7.41 16.88 144. 25 7.20 6.22 8.14 8.64 8.84 19.74 Test Method to Environmental Conditions Time b 0. 00 0.00 0.00 0.00 0.00 0.00 0.00 8. 00 0.37 0.24 0.17 0.41 0.45 1.66 Test Method to Environmental Conditions (continued) Time 14.99 0.39 0.32 0.38 0.56 0.73 2.7 ' 22. 01 0.59 0.55 0.66 0.96 1.10 3.90 29. 02 0.7Í 0.74 0.85 1.25 1.42 4.88 36. 07 1.21 1.13 1.24 1.50 2.06 6.21 50. 14 1.59 1.44 1.66 2.33 2.57 7.93 53. 01 1.66 1.51 1.73 2.37 2.65 8.16 60. 01 2.06 1.76 2.13 2.90 3.16 9.22 63. 97 2.03 1.81 2.16 3.05 3.36 9.73 70. 99 2.29 2.07 2.60 3.55 3.89 10.75 77. 97 2.55 2.27 2.81 3.85 4.31 11.64 Test Method of Aging in the Dark Time to 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1. 05 -0.12 -0.13 -0.10 -0.09 -0.08 -0.01 8. 03 -0.12 -0.10 -0.07 -0.09 -0.08 0.05 Test Method for Aging in the Dark (continued) Weather 19. 01 • 0.19 -0.18 -0.15 • 0.18 -0.17 0.02 22. 16 -0.13 -0.12 -0.10 -0.10 -0.10 0.10 29. 16 -0.23 -0.21 -0.22 -0.19 -0.21 0.05 36. 16 -0.21 -0.17 -0.16 -0.17 -0.19 0.17 50. 05 • 0.21 -0.16 -0.15 -0.17 -0.19 0.25 A contains 1% of the PTHF polymer. B contains 0.75% of the PTHF polymer. C contains 0.5% of the PTHF polymer. D contains 0.25% of the PTHF polymer. E contains 0.1% of the polymer PTHF F is a control that does not contain a stabilizing additive. During the accelerated photoaging, the inspection of the data in the table shows in order from the best to the worst B > A > C > D > E »F. These data show that nitroxide plus polymer provide resistance to yellowing after 144 hours of accelerated photoaging.

During photoaging at environmental conditions, the inspection of the data in the table shows in order from the best to the worst B > A > C > D > E »F. These data show that the nitroxide plus polymer provides resistance to yellowing after 78 days of photoaging at ambient conditions. During aging in the dark, the inspection of the data in the table shows in order from the best to the worst A > E > D > B > C »> F. These data show that the nitroxide plus polymer provides resistance to yellowing after 50 days of aging in the dark.

Example 43 Using the accelerated test method; the test method to environmental conditions; and aging in the dark, the BTMP hand towels containing 0.25% by weight of Compound B, hindered amine nitroxide, 1%, 0.5%, 0.25%, 0.2% or 0.1% by weight of the benzotriazole UV absorber TINUVIN ® 1130 and 0.5% by weight of PTHF polymer were compared for their effectiveness in the prevention of yellowing.The data are presented respectively in the three tables, below.

Accelerated Test Method Time B 0.00 0.00 0.00 0.00 0.00 0.00 0.00 23. 42 -0.01 0.4Í 0.60 0.47 1.34 4.52 47. 25 0.34 1.22 1.32 l.lí 2.65 8.11 71. 75 0.71 1.91 2.00 1.80 3.81 11.04 96. 17 1.04 2.62 2.72 2.49 4.90 13.60 119. 75 1.64 3.42 3.51 3.21 6.40 16.52 145. 75 2.30 5.05 5.11 4.65 8.26 20.82 168. 08 2.73 5.60 5.59 5.22 9.24 22.57 Test Method to Environmental Conditions Time to B 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6. 98 -0.14 0.20 -0.01 0.07 0.48 1.79 13. 97 -0.11 0.35 0.04 0.21 0.48 2.63 . 99 -0.04 0.58 0.25 0.44 0.74 3.73 28. 01 0.02 0.71 0.37 0.63 1.01 4.73 Test Method to Environmental Conditions (continued) Time B d 35.04 0.24 1.06 0.64 0.98 1.41 6.01 42. 11 0.47 1.28 0.91 1.26 1.7! 7.02 49. 11 0.55 1.29 0.88 1.36 1.87 7.7Í 51. 99 0.61 1.33 0.95 1.45 1.91 8.07 59. 11 0.79 1.70 1.24 1.72 2.40 9.32 62. 97 0.76 1.71 1.25 1.77 2.52 9.70 69. 97 1.16 2.09 1.59 2.14 3.00 10.88 77. 01 1.25 2.27 1.64 2.30 3.27 11.75 Test Method of Aging in the Darkness Time a B 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6. 97 0.00 0.04 0.03 0.04 0.10 0.17 17. 95 -0.09 -0.03 -0.05 -0.01 0.01 0.16 21. 09 -0.04 -0.03 -0.01 0.02 0.06 0.23 28. 10 -0.12 -0.16 -0.10 -0.07 -0.04 0.19 Test Method of Aging in the Dark (cntinuacion) Time d . 10 -0.07 -0.10 -0.07 -0.02 -0.02 0.28 48. 99 -0.05 -0.08 -0.05 -0.02 0.00 0.36 59. 89 -0.07 -0.11 -0.06 -0.04 -0.01 0.45 A contains 1% of the UV absorber. B contains 0.5% of the UV absorber. C contains 0.25% of the UV absorber. D contains 0.2% of the UV absorber. E contains 0.1% of the UV absorber. F is a control that does not contain a stabilizing additive. During the accelerated photoaging, the inspection of the data in the table shows in order from the best to the worst A > D > B > C > E »F. These data show that the more UV-absorbing nitroxide plus polymer provides resistance to yellowing after 168 hours of accelerated photoaging. During the photoaging to environmental conditions, the inspection of the data in the table shows in order of the best to worst A >; C > D = B > E »F. These data show that the more UV-absorbing nitroxide plus polymer provides resistance to yellowing after 77 days of photoaging at ambient conditions. During aging in the dark, the inspection of the data in the table shows in order from the best to the worst B > A > C > D > E > F. These data show that the more UV absorbing nitroxide plus polymer provides resistance to yellowing after 60 days of aging in the dark.

Example 44 Using the accelerated test method; the test method to environmental conditions; and aging in the dark, the BTMP hand towels containing 0.25%, 0.2%, 0.15%, 0.1% and 0.05% by weight of Compound B, hindered amine nitroxide, 0.5% by weight of the benzotriazole UV absorber TINUVIN® 1130 and 0.5% by weight of PTHF polymer were compared for their effectiveness in the prevention of yellowing. The data are presented respectively in the three tables, below.

Accelerated Test Method Time B 0. 00 0.00 0.00 0.00 0.00 0.00 0.00 Accelerated Test Method (continued) Time B d 26.00 0.49 0.41 1.12 1.93 2.02 6.01 48. 33 1.10 0.91 1.95 3.21 3.33 9.20 73. 50 1.63 1.39 2.73 4.47 4.55 11.87 96. 00 2.23 1.80 3.32 5.44 5.59 14.00 119. 83 2.64 2.31 4.13 6.63 6.65 15.98 144. 83 3.16 2.76 4.81 7.70 7.64 17.94 167. 67 3.76 3.36 -.63 8.85 8.82 19.87 191. 00 4.25 3.73 6.15 9.86 9.64 21.07 216. 42 5.20 4.73 1. bi 11. 69 11. 18 23. 66 Test Method to Environmental Conditions Time a b d 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1. 99 -0.19 -0.10 -0.12 0.10 0.20 0.76 8. 98 -0.17 0.06 0.01 0.37 0.61 1.95 16. 00 -0.08 0.17 0.22 0.70 1.09 3.14 Test Method to Environmental Conditions (continued) Time d 23.03 0.09 0.28 0.31 0.93 1.45 3.98 . 07 0.31 0.58 0.65 1.39 2.03 5.30 37. 13 0.56 0.80 0.99 1.85 2.47 6.30 44. 04 0.61 0.86 1.00 1.96 2.83 7.10 47. 00 0.71 0.94 1.02 2.02 2.94 7.26 54. 00 0.93 l.lí 1.35 2.36 3.47 8.36 57. 96 0.93 1.20 1.46 2.48 3.63 8.86 64. 98 1.14 1.43 1.79 2.76 4.03 9.95 72. 00 1.27 1.75 2.04 3.21 4.61 11.01 Test Method of Aging in the Darkness Time a B 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2. 02 0.03 0.03 0.06 0.04 0.07 0.11 12. 98 -0.06 -0.06 0.00 -0.01 0.02 0.21 16. 15 -0.01 -0.01 0.03 0.03 0.07 0.2Í Test Method for Aging in the Dark (continued) Time B 23.15 • 0.09 -0.12 -0.05 -0.07 0.02 0.25 . 15 -0.10 -0.08 -0.03 -0.07 0.05 0.34 37. 13 -0.06 -0.06 -0.01 -0.01 0.08 0.38 44. 04 -0.09 -0.06 -0.03 -0.02 0.07 0.42 54. 94 -0.11 -0.07 -0.03 -0.05 0.05 0.47 72. 03 0.00 -0.04 0.00 -0.03 0.11 0.56 A contains 0.25% nitroxide. B contains 0.2% nitroxide. c contains 0.15% nitroxide. D contains 0.1% of the nitroxide. E contains 0.05% nitroxide. E is a control that does not contain a stabilizing additive. During the accelerated photoaging, the inspection of the data in the table shows in order from the best to the worst B > A > C > D > E »F. These data show that the most UV-absorbing nitroxide plus polymer provides resistance to yellowing after 216 hours of accelerated photoaging. During the photoaging to environmental conditions, the inspection of the data in the table shows in order from the best to the worst A > B > C > D > E »F. These data show that the more UV absorbing nitroxide plus polymer provides resistance to yellowing after 72 days of photoaging at ambient conditions. During aging in the dark, the inspection of the data in the table shows in order from the best to the worst B > D > C > A > E »F. These data show that the more UV-absorbing nitroxide plus polymer provides resistance to yellowing after 72 days of aging in the dark.

Example 45 Using the accelerated test method; the test method to environmental conditions; and aging in the dark, the BTMP hand towels containing 0.25% by weight of Compound B, hindered amine nitroxide, 0.5% by weight of the benzotriazole UV absorber, TINUVIN® 1130 and 1%, 0.75%, 0.25% or 0.1 % by weight of the PTHF polymer were compared for their effectiveness in preventing yellowing. The data are presented respectively in the three tables, below.

Accelerated Test Method Time A b c d 0.00 0.00 0.00 0.00 0.00 0.00 22. 33 0.49. 0.86 0.31 0.45 4.68 47. 50 1.11 1.76 0.77 1.04 7.82 70. 00 1.61 2.53 1.20 1.49 10.05 93. 00 2.26 3.36 1.73 2.08 12.46 118. 83 2.70 4.10 2.16 2.67 14.44 141. 67 3.41 5.04 2.80 3.39 16.69 165. 00 3.95 5.74 3.20 3.90 18. 16 189. 42 4.97 7.2Í 4.11 5.52 21. 00 214. 00 6.32 9.24 5.37 6.86 24. 13 Test Method to Environmental Conditions Time A d 0.00 0.00 0.00 0.00 0.00 0.00 7. 90 -0.21 0.13 -0.20 -0.07 1.75 Test Method to Environmental Conditions (continued) Time A d 14.92 -0.10 0.32 -0.08 0.12 2.96 21. 92 -0.05 0.43 -0.06 0.21 3.87 28. 98 0.24 0.74 0.19 0.52 5.15 43.04 0.59 1.03 0.29 1.08 6.97 45. 91 0.69 1.08 0.35 0.99 7.13 52. 88 0.90 1.40 0.55 1.26 .23 56. 92 0.90 1.46 0.59 1.34 8.74 63. 90 1.12 1.7Í 0.85 1.71 9.77 Test Method of Aging in the Darkness Time A b 0.00 0.00 0.00 0.00 0.00 0.00 0. 94 0.04 0.03 0.02 0.02 0.04 11. 92 -0.03 -0.04 -0.06 -0.04 0.23 . 06 0.03 0.00 -0.01 0.01 0.33 22. 07 -0.07 -0.07 -0.09 -0.09 0.31 Test Method of Aging in the Darkness (continued) Time A d 29. 07 -0.04 -0.04 -0.08 -0.04 0.42 42. 96 -0.03 -0.04 -0.06 -0.05 0.49 53. 85 -0.01 -0.04 -0.07 -0.05 0.61 70. 96 0.06 0.01 -0.03 -0.04 0.70 A contains 1% of the PTHF polymer. B contains 0.75% of the PTHF polymer. C contains 0.25% of the PTHF polymer. D contains 0.1% of the PTHF polymer. E is a control that does not contain a stabilizing additive. During the accelerated photoaging, the inspection of the data in the table shows in order of the best to the worst C > A > D > B > "AND. These data show that the more UV-absorbing nitroxide plus polymer provides resistance to yellowing after 214 hours of accelerated photoaging.

During the photoaging to environmental conditions, the inspection of the data in the table shows in order of the best to the worst OA > D > B »> E. These data show that the more absorbent nitroxide of ÜV plus polymer provides resistance to yellowing after 64 days of photoaging at ambient conditions. During aging in the dark, the inspection of the data in the table shows in order from the best to the worst D > OB > A »> E. These data show that the more UV-absorbing nitroxide plus polymer provides resistance to .1 yellowing after 71 days of aging in the dark.

Example 46 Using the accelerated test method; the test method to environmental conditions; and aging in the dark, Aspen BCTMP hand towels containing 0.25% by weight of Compound B, hindered amine nitroxide, 1%, 0.5% or 0% by weight of the benzotriazole UV absorber TINUVIN® 1130 and 1%, 0.5% or 0% by weight of the PTHF polymer were compared for their effectiveness in preventing yellowing. The data are presented respectively in the three tables, below.

Accelerated Test Method Time 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1. 00 3.50 2.59 0.77 1.02 5.81 2. 02 5.57 3.81 1.16 1.51 8.77 3. 03 '7.49 5.05 1.71 2.02 11.62 4. 01 9.04 5.82 2.06 2.46 13.93 4. 98 10.54 6.76 2.56 2.95 16.26 6. 14 12.04 7.67 2.82 3.21 18.49 7. 64 13.90 8.61 3.37 3.81 21.64 8. 24 14.60 8.76 3.54 3.95 22.42 Test Method to Environmental Conditions Time 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1. 99 0.76 0.49 0.07 0.26 1.51 3. 06 1.27 0.84 0.28 0.48 2.44 24. 13 1.80 1.22 0.52 0.73 3.25 Test Method for Environmental Conditions (continued) Time a b d 31.13 2.00 1.34 0.61 0.76 3.85 34. 02 1.94 1.33 0.61 0.79 3.93 41. 00 2.16 1.63 0.84 0.95 4.63 45. 00 2.39 1.66 0.84 0.96 4.91 52. 14 2.81 1.66 1.04 1.13 5.57 59. 02 3.15 1.84 1.23 1.22 6.10 Test Method of Aging in the Darkness Time 0.00 0.00 0.00 0.00 0.00 0.00 9. 17 -0.04 • 0.03 0.01 -0.02 0.01 16. 16 0.03 0.01 0.07 0.04 0.03 23. 13 0.09 0.08 0.12 0.08 0.10 . 06 0.07 0.03 0.10 0.03 0.05 40. 94 0.06 0.04 0.11 0.05 0.05 58. 04 0.11 0.28 0.32 0.28 0.29 A does not contain UV absorber or PTHF polymer. B does not contain UV absorber and 1% of the PTHF polymer. C contains 1% of the UV absorber and no PTHF polymer. D contains 0.5% of the UV absorber and 0.5% of the PTHF polymer. E is a control that does not contain a stabilizing additive. During accelerated photoaging the inspection of the data in the table shows in order of the best to the worst C >; D > B > A > > E. These data show that the nitroxide plus UV absorber plus polymer provides resistance to yellowing after 8 days of accelerated photoaging. During the photoaging to environmental conditions, the inspection of the data in the table shows in arden from the best to the worst C > D > B > A »E. These data show that the more UV-absorbing nitroxide plus polymer provides resistance to yellowing after 59 days of photoaging at ambient conditions. During aging in the dark, the inspection of the data in the table shows in order from the best to the worst A > B > D > E > C. These data show that the more UV absorbing nitroxide plus polymer provides resistance to yellowing after 71 days of aging in the dark.

Example 47 Using the accelerated test method; the test method to environmental conditions; and aging in the dark, hand towels made of ground wood (SGW) containing 0.25% by weight of the amine nitroxide hindered Compound B, 1%, 0.5% or 0% by weight of the benzotriazole UV absorber. 1130 and 1%, 0.5% or 0% by weight of the PTHF polymer were compared for their effectiveness in preventing yellowing. The data are presented respectively in the three tables, below.

Accelerated Test Method Time 0.00 0.00 0.00 0.00 0.00 0.00 0. 99 3.94 3.28 0.82 1.51 8.19 1. 97 6.95 5.11 1.69 2.70 12.54 2. 94 9.75 6.84 2.48 3.81 16.70 4. 09 12.15 8.83 3.34 5.09 20.41 Accelerated Test Method (continued) Time b 5.60 15.07 10.72 4.42 6.39 25.36 6. 20 15.74 11.24 4.83 6.90 26.84 Test Method to Environmental Conditions Time 0.00 0.00 0.00 0.00 0.00 0.00 6. 95 0.44 0.15 -0.25 -0.24 1.80 14. 01 1.19 0.63 0.08 0.03 3.22 28. 08 2.27 1.25 0.51 0.36 5.25 . 98 2.26 1.32 0.57 0.38 5.30 37. 96 2.91 1.74 0.82 0.63 6.55 41. 94 3.03 1.86 0.89 0.70 7.13 48. 99 3.64 2.12 1.21 0.83 8.30 55. 98 4.12 2.40 1.44 1.01 9.15 Test Method of Aging in the Dark Weather 0. 00 0.00 0.00 0.00 0.00 0.00 7. 13 -0.08 -0.17 -0.06 -0.13 -0.10 14. 12 -0.01 -0.15 -0.01 -0.14 -0.02 21. 08 0.16 0.02 0.10 0.00 0.18 28. 02 0.13 -0.02 0.09 -0.03 0.13 38. 90 0.18 0.00 -0.03 -0.09 0.13 56. 00 0.88 0.13 0.31 0.05 0.28 A does not contain UV absorber or PTHF polymer. B does not contain UV absorber and 1% of the PTHF polymer. C contains 1% of the ÜV absorber and no PTHF polymer. D contains 0.5% of the UV absorber and 0.5% of the PTHF polymer. E is a control that does not contain a stabilizing additive. During the accelerated photoaging, the inspection of the data in the table shows in order 'from the best to the worst C > D > B > A »E. These data show that the more UV-absorbing nitroxide plus polymer provides resistance to yellowing after 6 days of accelerated photoaging. During the photoaging to environmental conditions, the inspection of the data in the table shows in order of the best to the worst D > C > B > A »E. These data show that the most UV-absorbing nitroxide plus polymer provides resistance to yellowing after 56 days of photoaging at ambient conditions. During aging in the dark, the inspection of the data in the table shows in order from the best to the worst D > B > E > C > A. These data show that the more UV-absorbing nitroxide plus polymer provides resistance to yellowing after 56 days of aging in the dark.

Example 48 Using the accelerated test method; the test method to environmental conditions; and aging in the dark, fillers of BTMP paper with 0.25%, 0.2%, 0.15%, 0.1% and 0.05% by weight of hindered amine nitroxide Compound B and 0.5% by weight of Compound LL were compared for their effectiveness in preventing of yellowing in aging. The sec data present respectively in the three tables, below. Accelerated Test Method Time a d g 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 24. 67 2.94 2.72 3.19 3.46 4.29 4.76 6.70 6.48 48. 25 5.79 5.16 5.68 6.06 7.46 8.16 10.98 10.9Í 71. 75 7.60 7.25 7.93 8.31 10.03 11.02 14.43 14.37 97. 08 9.13 8.83 9.60 10.13 11.85 13.14 16.98 17.00 120. 25 10.76 10.55 11.21 11.72 13.58 15.01 19.31 19.34 168. 25 14.63 14.71 15.17 15.52 18.08 19.76 25.10 25.36 Test Method to Environmental Conditions Time to 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 8. 01 0.39 0.21 0.54 0.50 0.68 1.13 1.91 2.05 . 03 0.62 0.41 0.81 0.80 1.05 1.67 2.80 3.02 22. 05 1.19 0.89 1.30 1.28 1.62 2.44 3.92 4.31 Test Method for Environmental Conditions (cntinuacion) Time a d 29.14 1.74 1.25 1.74 1.71 2.13 3.17 4.88 5.38 36. 14 2.07 1.45 2.00 2.00 2.48 3.56 5.65 6.25 39. 01 2.03 1.47 2.01 2.06 2.50 3.60 5.75 6.46 46. 01 2.46 1.98 2.53 2.53 3.11 4.42 6.82 7.62 50. 01 2.62 2.04 2.67 2.71 3.31 4.74 7.28 8.10 56. 99 3.06 2.40 3.09 3.11 3.71 5.33 8.24 9.17 64. 01 3.36 2.80 3.46 3.42 4.25 5.94 9.19 10.03 Method of Testing of Aging in the Dark Time a d 0.00, 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 .16 0.09 -0.06 0.02 0.08 0.02 0.05 0.13 0.17 . 17 -0.08 -0.21 -0.11 -0.05 -0.07 -0.05 0.10 0.15 22. 18 -0.13 -0.22 -.17 -0.11 -0.09 -0.07 0.13 0.30 29. 14 0.01 -0.16 0.01 0.06 0.01 0.06 0.29 0.40 Test Method of Aging in the Dark (with inuación) Time a b g h 36. 07 0.00 -0.22 -0.05 0.02 -0.02 0.03 0.27 0.40 46. 95 -0.07 -0.21 -0.05 0.01 -0.03 0.04 0.32 0.49 TO . It contains 0.25% nitroxide and 0.5% rinse aid. B contains 0.25% nitroxide and no rinse aid. C contains 0.2% nitroxide and 0.5% rinse aid. D contains 0.15% nitroxide and 0.5% rinse aid. E contains 0.1% nitroxide and 0.5% rinse aid. F contains 0.05% nitroxide and 0.5% rinse aid. G is a control containing nitroxide and 0.5% rinse aid. H is a control that does not contain a stabilizing additive. During the accelerated photoaging, the inspection of the data in the table shows in order from the best to the worst A > B > C > D > E > F »G = H. These data show that the nitroxide plus brightener provides resistance to yellowing after 168 hours of accelerated photoaging. During photoaging at environmental conditions, the inspection of the data in the table shows in order from the best to the worst B > UN = C = D > E > F > G > H. These data show that nitroxide plus brightener provides resistance to yellowing after 64 days of photoaging at ambient conditions. During aging in the dark, the inspection of the data in the table shows in order from the best to the worst B > OA > E > D > F > G > H. These data show that the nitroxide plus brightener provides resistance to yellowing after 47 days of aging in the dark.

Example 49 Using the aging method in the dark, the BTMP hand towels were allowed to stand in the dark for 10 days before the treatment with 0.05 wt.% Nitroxide of Compound B. The leaves were aged in the dark then during a period of 72 days. The ISO brightness data is given in the following table.

Days -10 78.11 78.22 77.94 77.48 77.48 2.02 77.71 77.14 12.98 77.89 76.85 16.15 77.72 76.65 23.15 77.87 76.75 30.15 77.8 76.48 37.13 77.68 76.37 44.04 77.74 76.28 54.94 77.7 76.13 72.03 77.6 75.89 E contains 0.05% nitroxide. F is a control that does not contain a stabilizing additive.

Nitroxide provides good ISO brightness values after a period of 72 days of aging in the dark.

Example 50 Accelerated Yellowing with High Intensity Lamps BTPM sheets were treated with 0.5% by weight of Compound S and 0.5% by weight of Compound A and Compound FF Time S, A S, FF A FF Control in days PC number 0. 78 0.14 -0.23 1.93 0.7 0.67 3.26 1. 75 0.38 -0.32 3.77 1.12 1.09 6.19 2. 75 0.85 -0.19 5. 1.93 1.86 9.16 3. 77 1.25 -0.14 7.62 2.51 2.45 11.6 4. 77 1.54 -0.22 9.48 3.19 3.07 13.8 . 75 1.87 -0.07 10.9 3.74 3.59 15.83 6. 78 2.16 -0.13 11.87 4.22 4.07 16.97 • Inspection of the data reveals that the hydroxylamine citrate salts are more effective in inhibiting yellowing than hydroxylamine and in combination with a UVA, higher results are achieved with the citrate salt.

Example 51 Accelerated Yellowing with High Intensity Lamps The BTPM sheets were treated with 0.25% by weight of Compound A and with 1% by weight of the sulfur-containing inhibitors: 2- (2'-methoxyethoxy) -ethanol; 2, 2'-oxidietantiol; 1-thioglycerol; sodium thioglycolate; thiolactic acid; sodium thiolactate; β-mercaptopropionic acid; sodium β-mercaptopropionate; glycol dimercaptoacetate; glycol dimercaptopropionate; polyethylene glycol dimercaptoacetate; polyethylene glycol dimercaptopropionate; pentaerythritol tetrathioglycolate; trimethylol propan tri- (3-mercaptopropionate); polymethylene sulfide; disodium methylene bis thiopropionate; 3, 3'-thiodipropionic acid; dithiothreitol. Sheets treated with a combination of hydroxylamine and sulfur-containing compounds exhibited substantial inhibition to yellowing compared to untreated control sheets and illustrated the increase in performance when combinations of hydroxylamine and sulfur-containing compounds were used.

Example 52 Accelerated Yellowing with High Intensity Lamps The BTPM sheets were treated with 0.25% by weight of the Compound FF and with 1% by weight of the sulfur-containing inhibitors: 2- (2'-methoxyethoxy) -ethanol; 2, 2'-oxidietantiol; 1-thioglycerol; sodium thioglycolate; thiolactic acid; sodium thiolactate; β-mercaptopropionic acid; sodium β-mercaptopropionate; glycol dimercaptoacetate; glycol dimercaptopropionate; polyethylene glycol dimercaptoacetate; polyethylene glycol dimercaptopropionate; pentaerythritol tetrathioglycolate; trimethylol propan tri- (3-mercaptopropionate); polymethylene sulfide; disodium methylene bis thiopropionate; 3, 3'-thiodipropionic acid; dithiothreitol. Sheets treated with a combination of hydroxylamine salt and sulfur-containing compounds exhibited substantial inhibition to yellowing compared to untreated control sheets and illustrated the increase in performance when combinations of hydroxylamine salt and sulfur-containing compounds were used.

EXAMPLE 53 Accelerated Yellowing with High Intensity Lamps The BTPM sheets were treated with 0.25% by weight of Compound B and with 1% by weight of the sulfur-containing inhibitors Compounds GG, HH and II Time B, GG B, HH B, II GG HH II control in Days PC number 0. 92 1.1 1.25 1.1 2.92 3.65 2.55 3.94 1. 88 2.4 2.32 2.09 5.9 6.45 4.93 6.91 3. 9 5.33 4.36 3.98 11.88 11.48 9.81 12.15 7. 31 5.59 5.13 15.56 14.26 12.86 14.84 . 95 9.37 6.88 6.32 18.55 16.58 15.5 17.13 6. 95 11.32 8.06 7.37 21.3 18.51 17.75 18.93 7. 92 13.34 9.17 8.55 24.39 20.74 20.43 21.43 8. 88 15.1 10.34 9.72 27.33 22.74 22.9 23.55 Sheets treated with a combination of nitroxide and sulfur-containing compounds exhibited substantial inhibition to yellowing compared to untreated control sheets and illustrated the increase in performance when a combination of nitroxides and sulfur-containing compounds was used. Inspection of the data reveals that Compounds HH and II are particularly effective when combined with a nitroxide.

Example 54 Accelerated Yellowing with High Intensity Lamps The BTPM sheets were treated with 0.25% by weight of Compound A, 0.5% of Compound R and with 1% by weight of the inhibitors containing sulfur: 2- (2'-methoxyethoxy) -etantiol; 2,2'-oxidietantiol; 1-thioglycerol; sodium thioglycolate; thiolactic acid; sodium thiolactate; β-mercaptopropionic acid; sodium β-mercaptopropionate; glycol dimercaptoacetate; glycol dimercaptopropionate; polyethylene glycol dimercaptoacetate; polyethylene glycol dimercaptopropionate; pentaerythritol tetrathioglycolate; trimethylol propan tri- (3-mercaptopropionate); polymethylene sulfide; disodium methylene bis thiopropionate; 3, 3'-thiodipropionic acid; dithiothreitol. Sheets treated with a combination of hydroxylamine, UVA and sulfur-containing compounds exhibited substantial inhibition to yellowing compared to untreated control sheets and illustrated the increase in performance when combinations of hydroxylamine, UVA and sulfur-containing compounds were used.

Example 56 Accelerated Yellowing with High Intensity Lamps BTPM sheets were treated with 0.25% by weight of Compound FF, 0.5% of Compound R and with 1% by weight of inhibitors containing sulfur: 2- (2'-methoxyethoxy) -etantiol; 2, 2'-oxidietantiol; 1-thioglycerol; sodium thioglycolate; thiolactic acid; sodium thiolactate; β-mercaptopropionic acid; sodium β-mercaptopropionate; glycol dimercaptoacetate; glycol dimercaptopropionate; polyethylene glycol dimercaptoacetate; polyethylene glycol dimercaptopropionate; pentaerythritol tetrathioglycolate; trimethylol propan tri- (3-mercaptopropionate); polymethylene sulfide; disodium methylene bis thiopropionate; 3, 3'-thiodipropionic acid; dithiothreitol. The . leaves treated with a combination of hydroxylamine salt, UVA and sulfur-containing compounds exhibited substantial inhibition to yellowing compared to untreated control leaves and illustrated the increase in performance when combinations of hydroxylamine salt, UVA and compounds containing sulfur.

Example 57 Accelerated Yellowing with High Intensity Lamps BTPM sheets were treated with 0.25% by weight of Compound B, 0.5% of Compound R and with 1% by weight of the sulfur-containing inhibitors Compounds CG, HH and II RR Time, B, GR, B, R, B, R, GG R, HH R, II control in G HH II Days PC Number 0 0 0 0 0 0 0 0 0 0 0. 92 1.62 1.52 0.97 0.48 0.5 1.58 1.92 1.51 3.94 1. 88 3.05 3 2.08 1.1 1.2 3.23 3.56 3.08 6.91 3. 9 5.8 5.99 4.33 2.14 2.55 6.65 6.75 6.35 12.15 7.47 7.58 5.82 2.99 3.65 9.12 8.93 8.63 14.84 . 98 9.07 9 7.26 3.82 4.7 11.17 10.65 10.59 17.13 6. 95 10.28 10.35 8.43 4.58 5.78 12.99 12.25 12.36 18.93 7. 92 11.58 11.72 10.03 5.38 6.77 14.95 14.05 14.36 21.43 8. 88 12.9 12.88 11.21 6.13 7.89 17.25 15.97 16.12 23.55 Sheets treated with a combination of nitroxide, UVA and sulfur-containing compounds exhibited substantial inhibition to yellowing compared to untreated control sheets and illustrated the increase in performance when combinations of nitroxides, UVA and sulfur-containing compounds were used. Inspection of the data reveals that Compounds HH and II are particularly effective when combined with a nitroxide and UVA.

EXAMPLE 58 Accelerated Yellowing with High Intensity Lamps BTPM sheets were treated with 0.25% by weight of Compound A and with 1% by weight of the following metal salts: MgSO4 MnSO4 ZnSO4 Leaves treated with a combination of hydroxylamine and sodium salt. metal exhibited substantial inhibition to yellowing compared to untreated control sheets and illustrated the increase in performance when combinations of hydroxylamine and metal salt were used.

Example 59 Accelerated Yellowing with High Intensity Lamps BTPM sheets were treated with 0.25% by weight of Compound B and with 1% by weight of the following metal salts: MgSO4 MnSO4 ZnSO4 Leaves treated with a combination of nitroxide and salt metal exhibited substantial inhibition to yellowing compared to untreated control sheets and illustrated the increase in performance when nitroxide and metal salt combinations were used.

EXAMPLE 60 Accelerated Yellowing with High Intensity Lamps The BTPM sheets were treated with 0.25% by weight of Compound A and with 1% by weight of the diene compounds: 1-methoxy-1,3-cyclohexadiene; 1-methoxy-1,4-cyclohexadiene; 2,4-hexadienoic acid; trans, trans-2, 4-hexadien-l-ol. Sheets treated with a combination of hydroxylamine and diene compound exhibited substantial inhibition to yellowing compared to untreated control sheets and illustrated the increase in performance when combinations of hydroxylamine and diene compound were used.

Example 61 Accelerated Yellowing with High Intensity Lamps The BTPM sheets were treated with 0.25% by weight of Compound B and with 1% by weight of the following diene compounds: 1-methoxy-1,3-cyclohexadiene; 1-methoxy-1,4-cyclohexadiene; 2,4-hexadienoic acid; trans, trans-2, 4-hexadien-l-ol. The sheets treated with a combination of nitroxide and diene compound exhibited substantial inhibition to yellowing compared to the untreated control sheets and illustrated the increase in performance when combinations of nitroxide and compounds were used.

EXAMPLE 62 Accelerated Yellowing with High Intensity Lamps BTPM sheets were treated with 0.25% by weight of Compound FF and with 1% by weight of the following diene compounds: 1-methoxy-l, 3-cyclohexadiene; 1-methoxy-1,4-cyclohexadiene; 2,4-hexadienoic acid; trans, trans-2, 4-hexadien-l-ol. The sheets treated with a combination of hydroxylamine salt and diene compound exhibited substantial inhibition to yellowing compared to the untreated control sheets and illustrated the increase in performance when combinations of hydroxylamine salt and compounds were used.

Example 63 l-Oxyl-2, 2,6,6-tetramethyl-4-glycidyloxypiperidine A vigorously stirred two-phase solution of l-oxyl-2, 2, 6,6-tetramethyl-4-hydroxypiperidine, epichlorohydrin, tetrabutylammonium bromide in 50% aqueous sodium hydroxide and toluene were reacted together. The organic phase was dried over anhydrous magnesium sulfate and concentrated to obtain the title compound as a red solid of low melting after column chromatography.

Example 64 L-Oxyl-2, 2,6,6,6-tetramethyl-4- (2-hydroxy-4-oxa-6-trimethylammoniohexyloxy) iperidine Chloride The title compound was prepared by reacting the glycidyloxy compound of Example 63 with Chloride of [chloride (2-hydroxyethyl) trimethylammonium].

Example 65 L-Oxyl-2,2,6,6-tetramethyl-4- (2-hydroxy-3-trimethylammoniopropoxy) iperidine Chloride To 25 mL of 0.4 molar aqueous trimethylammonium hydroxide (0.01 mole) 2.28 g (0.01 mole) were added. mol) of 1-oxyl-2, 2,6,6,6-tetramethyl-4-glycidyloxypiperidine. The mixture was stirred at room temperature for 16 hours. The solution was then neutralized with one valent of hydrochloric acid, washed twice with 50 L of ethyl acetate and concentrated under reduced pressure. The resulting red oil was purified by column chromatography to give 1. 0 g of the title compound as a red oil.

Example 66 l-Oxyl-2, 2, 6, 6-tetramethyl-4-. { 2-hydroxy-3-di (2-hydroxyethyl) amino] propoxy} piperidine A solution of 2.28 g (0.01 mol) of l-oxyl-2, 2,6,6-tetramethyl-4-glycidyloxypiperidine and 1.05 g (0.01 mol) of diethanolamine in 25 mL of water was stirred at room temperature for 16 hours. hours . The solution was then extracted with methylene chloride. The extracted methylene chloride was dried over anhydrous magnesium sulfate, filtered and concentrated. The crude reaction product was purified by column chromatography to give 1. 0 g of the title compound as a red oil.

Example 67 l-Oxyl-2, 2,6,6-tetramethyl-4- (2-hydroxy-3-dimethylaminopropoxy) iperidine A mixture of 10.0 g (0.044 mol) of l-oxyl-2, 2, 6, 6 tetramethyl-4-glycidyloxypiperidine and 10 mL of 40% dimethylamine (ca. 0.091 mo) (weight / weight) was dissolved in 100 L of water and then stirred for 16 hours at room temperature. The water was then removed by vacuum distillation to give 10 g of the title compound as a red oil.

Example 68 l-Oxyl-2, 2,6,6-tetramethyl-4- (2-hydroxy-3-diethylaminopropoxy) iperidine The title compound was prepared according to the procedure of Example 67 when the dimethylamine was replaced with an valent amount of diethylamine. The product was purified by column chromatography and isolated as a red oil.

Example 69 N, N'-Dimethyl-N, N'-bis- [3- (l-oxyl-2,2,6,6-tetramethyl-piperidin-4-yloxy) -2-hydroxypropyl] examethylenediamine The compound was prepared of the title according to the procedure of Example 4 replacing diethanolamine with an valent amount of N, N 'dimethylhexamethylenediamine. The product was purified by column chromatography and isolated as a red oil.

EXAMPLE 70 N, N, N ', N'-Tetramethyl-N, N' -bis- [3- (1-oxyl-2,2,6,6-tetramethylpiperidin-4-yloxy) -hydroxypropyl] -bromide. hexamethylene diamine A solution of 3.0 g (0.01 mol) of the compound of Example 67 and 0.89 g (0.0036 mol) of dibromohexane in 25 mL of absolute ethanol was refluxed for 16 hours. The resulting solution was concentrated under reduced pressure and the residue was washed three times with 20 mL of ethyl acetate and then dried under vacuum. The title compound was obtained in a yield of 3.0 g as a red solid.

EXAMPLE 71 L-Oxyl-2,2,6,6-tetramethyl-4- [2-hydroxy-3- (N, N-dimethyl-N-propylammonium) ropoxy) iperidine Chloride The title compound was prepared according to procedure of Example 70 replacing 1,6-dibromohexane with an equivalent amount of 1-bromopropane. The title compound was isolated as a red oil.

EXAMPLE 72 Ethyl l-Oxyl-2, 2,6,6-tetramethyl-piperidin-4-ylkylacetate To a solution of 3.0 g (17 mmol) of 1-oxyl-2, 2,6,6-tetramethyl-4-hydroxypiperidine in 25 mL of anhydrous tetrahydrofuran was added 0.48 g (20 mmol) of sodium hydride. The reaction mixture was stirred under a stream of nitrogen for one hour. The mixture was then cooled to 0 ° C and 2.9 g (17 mmol) of ethyl bromoacetate were added dropwise. After the addition, the reaction mixture was stirred for an additional 30 minutes during which time a precipitate formed. The mixture was filtered and the solvent was removed under reduced pressure. The title compound was isolated after column chromatography as an orange molten solid at 41-43 ° C.

Example 73 l-Oxyl-2, 2,6,6-tetramethylpiperidin-4-yloxyacetic acid To a solution of 0.2 g of sodium hydroxide in mL of 1: 1 water: methanol was added 1.0 g (39 mmol) of the compound of Example 72. The mixture was stirred for one hour and then carefully acidified with 1% aqueous hydrochloric acid. The resulting mixture was extracted with ethyl acetate. The organic extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure to give the title compound as an orange solid.

EXAMPLE 74 Sodium l-0-lyl-2,2,6,6-tetramethylpiperidin-4-yloxyacetate A solution of 1.0 g (4.3 mmol) of the compound of Example 73 was dissolved in 20 mL of water, 0.17 g (4.3 mmol) was added. ) of sodium hydroxide. The solution was stirred for one hour and the water was then removed by vacuum distillation to give the title compound as an orange solid.

Example 75 Colin ester of l-oxyl-2,2,6,6-tetramethylpiperidin-4-yloxyacetic acid The title compound was prepared by reacting the acid of Example 73 with [(2-hydroxyethyl) trimethylammonium chloride] choline chloride. .

Example 76 L-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidinium chloride 67 mL of isopropanol were cooled to 0 ° C and saturated with gaseous HCl. To this solution was added dropwise in a magnetically stirred solution of 50 g (0.29 mo) of l-oxyl-212,6,6-tetramethyl-4-hydroxypiperidine in 130 mL of isopropanol, maintaining a reaction temperature of approximately 20 °. C by occasional cooling with an ice bath. The HCl salt was filtered under vacuum and washed with isopropanol, giving a pale yellow solid. 5.0 g of this crude product was recrystallized from 100 mL of isopropanol to give 3 g of a white crystalline solid, mp. > 260 ° C. Elemental Analysis: Calculated Found% C 5.1.55 51.30% H 9.61 9.70% N 6.68 6.42% C1 16.91. 16.83 Example 77 l-Hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidinium acetate 5.0 g (0.029 mo) l-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidine and 2.0 g (0.033 mol) ) of acetic acid were recrystallized from 50 mL of isopropanol, giving 4.0 g of the desired hydroxylamine salt as a white crystalline solid, mp 140-143 ° C. Calculated Elemental Analysis Found% C 56.63 56.78% H 9.94 10.13% N 6.00 6.07 Example 78 L-hydroxy-2, 2,6,6-t-ramethyl-4-hydroxypiperidinium bisulfate 5.0 g (0.029 mol) l-hydroxy-2 , 2, 6, 6-tetramethyl-4-hydroxypiperidine and 3.0 g (0.031 mol) sulfuric acid were recrystallized from 50 mL of isopropanol, giving 3.0 g of the desired salt of hydroxylamine as a white crystalline solid, mp 238-241 ° C . Elemental Analysis: Calculated Found% C 39.99 40.06% H 7.46 8.06% N 5.18 5.11% S 11.86 11.87 Example 79 L-hydroxy-2, 2,6,6-tetramethyl-4-acetamidopiperidinium bisulfate 2.6 ml of concentrated sulfuric acid were added dropwise to a solution of 10. Og (46.9 mmol) of 1-oxyl-2, 2 , 6,6-tetramethyl-4-acetamidopiperidine in 50 ml isopropanol. 48 hours later the resulting white solid was collected by filtration, washed with isopropanol and dried under vacuum, mp 198 ° C. Elemental Analysis: Calculated Found% C 42. 28 42. 23% H 7. 76 7. 76% N 8. 97 8. 85 Example 80 Bis- (1-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium oxalate) To a 0.5L glass reaction bottle was added 10.0 g (58 mmol) of C, 5.22 g (58 mmol) of oxalic acid, 200 mg of Pt on C at 5% and 100 mL of water. The catalytic reaction was carried out at 3,515 kgf / cm2 (50 psi) for 30 minutes at room temperature. The catalyst was removed by vacuum filtration over Celite. The water was removed by distillation under reduced pressure, giving a colorless solid. The product was recrystallized from 100 mL isopropanol to give 3.5 g of the product as a white crystalline solid, mp 244 ° C. Elemental Analysis: Calculated Found% C 55.03 54.69% H 9.24 9.49% N 6.42 6.32 Example 81 Tris- (l-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium citrate) To a 0.5L reaction bottle , glass, 20.0 g (116 mmol) of l-oxyl-2, 2, 6, ß-tetramethyl-4-hydroxypiperidine 7.39 g (38.5 mmol) of citric acid, 200 mg of Pt on C at 5% were added and 100 mL of water. Catalytic hydrogenation was carried out at 3515 kgf / cm2 (50 psi) for 30 minutes at room temperature. The catalyst was removed by filtration through a pad of Celite. The aqueous saline solution had a pH of 5.56. Removal of the water gave the product as a hydroscopic glassy solid.

Example 82 Bis- (1-hydroxy-2, 2, 6,6-tetramethyl-4-hydroxypiperidinium citrate) To a 0.5L reaction bottle, glass, 20.0 g (116 mmol) of l-oxyl- were added. 2, 2, 6, 6-tetramethyl-4-hydroxypiperidine 11.12 g (58 mmol) of citric acid, 200 mg of Pt on C at 5% and 100 mL of water. Catalytic hydrogenation was carried out at 3515 kgf / cm2 (50 psi) for 30 minutes at room temperature. The catalyst was removed by filtration through a pad of Celite. The aqueous saline solution had a pH of 4.39. Removal of the water gave the product as a hydroscopic glassy solid.

EXAMPLE 83 L-Hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidinium citrate To a 0.5 L glass reaction bottle was added 20.0 g (116 mmol) of l-oxyl-2, 2, 6,6-tetramethyl-4-hydroxypiperidine, 22.2 g (116 mmol) of citric acid, 200 mg of Pt on C at 5% and 100 mL of water. Catalytic hydrogenation was carried out at 3.15 kgf / cm2 (50 psi) for 30 minutes at room temperature. The catalyst was removed by filtration through a pad of Celite. The aqueous saline solution had a pH of 3.30. Removal of the water gave the product as a hydroscopic glassy solid.

EXAMPLE 84 Bis- (1-hydroxy-2,2,6,6-tetra-ethyl-4-hydroxypiperidinium sulphate) To a 0.5 L reaction bottle, glass, 10.0 g (58 mmol) of l-oxyl- were added. 2,2,6,6-tetramethyl-4-hydroxypiperidine 2-85g (29 mmol) of citric acid, 200 mg of Pt on C at 5% and 100 mL of water. Catalytic hydrogenation was carried out at 3515 kgf / cm2 (50 psi) for 30 minutes at room temperature. The catalyst was removed by filtration through a pad of Celite. Removal of water gave the product as a pale yellow solid.

The following examples are of the compounds of formulas III-IIIe. Example 85 L-Oxyl-2, 2,6,6-tetramethyl-4-allyloxypiperidine A vigorously stirred two-phase solution of 30.0 g (0.17 mol) l-oxyl-2, 2,6,6-tetramethyl-4-hydroxypiperidine , 29.0 g (0.24 mol) of allyl bromide, 2.6 g (8 mmol) of tetrabutylammonium bromide, 100 L of 50% aqueous sodium hydroxide and 30 mL of toluene were heated at 70 ° C for 90 minutes. The mixture was partitioned between 100 mL of toluene, 1 00 mL of heptane and 200 mL of water. The organic phase was dried over anhydrous magnesium sulfate and concentrated to obtain the title compound as a red oil after column chromatography.

Example 86 l-0xyl-2, 2,6,6-tetramethyl-4- (2-methoxyethoxy) iperidine The title compound was synthesized using the same general procedure as described in Example 85 and using 2-bromoethyl methyl ether instead of allyl bromide. The product was isolated as a red oil after column chromatography.

Example 87 L-Oxyl-2, 2,6,6-tetramethyl-4-glycidyloxypiperidine The title compound was synthesized using the same general procedure as described in Example 85 and using epichlorohydrin instead of allyl bromide.

The product was isolated as a red, low melting solid after column chromatography.

Example 88 L-Oxyl-2, 2,6,6-tetramethyl-4- (2,3-dihydroxypropoxy) piperidine 1.0 g of the compound of Example 87 was heated at 110 ° in 50 mL of 50% sodium hydroxide for six hours. The mixture was extracted with ethyl acetate, and the organic extract was dried and concentrated. The title compound was isolated as a red oil after column chromatography.

Example 89.l.l-0xyl-2,2,6,6-tetramethyl-4- (2-hydroxy-4-oxapentoxy) iperidine 1.0 g of the compound of Example 87 was heated to 60 ° C in a solution of 0.25 g sodium methoxide. in 50 mL of methanol for six hours. The reaction mixture was then partitioned between water and ethyl acetate. The title compound was isolated as a red oil after column chromatography.

EXAMPLE 90 l-OXYL-2, 2,6,6-tetramethyl-4- (carboethoxymethoxy) piperidine 0.48 g (20 mmol) of sodium hydride were added to a solution of 3.0 g (17 mmol) of l-oxyl-2 , 2, 6, 6-tetramethyl-4-hydroxypiperidine in 25 mL of anhydrous tetrahydrofuran. The reaction mixture was stirred under a stream of nitrogen for one hour. The mixture was cooled to 0 ° C and 2.9 'g (17 mmol) of ethyl bromoacetate were added dropwise. After the addition was complete, the reaction was stirred for an additional 30 minutes, during which time a white precipitate formed. The mixture was filtered and the solvent was removed under reduced pressure. The title compound was isolated as an orange solid after column chromatography and melted at 41-43 ° C.

EXAMPLE 91 l-Oxyl-2,2,6,6-tetramethyl-4- (carboxymethoxy) piperidine 1.0 g (39 mmol) of the compound of Example 90 were added a solution of 0.2 g sodium hydroxide in 20 mL of water / methanol 1: 1 The mixture was stirred for one hour, carefully acidified with 1% aqueous hydrogen chloride and then extracted with ethyl acetate. The organic extract was dried over anhydrous magnesium sulfate and then concentrated to give the title compound as an orange solid.

Example 92 2-I-l-Oxyl-2,2,6,6-tetramethylpiperidin-4-yl oxyethoxyacetate 34.4 grams of l-oxyl-2, 2,6,6,6-tetramethyl-4-hydroxypiperidine, 29.6 grams of 2- Methyl methoxyethoxyacetate and 300 mL of heptane were transferred to a 500 mL three-necked round bottom flask equipped with a mechanical stirrer, Dean-Stark trap and condenser. Trace amounts of water were removed by azeotropic distillation. 0.25 mL of tetraisopropyl orthotitanate was added to the reaction mixture. The reaction mixture was refluxed for six hours and methanol released in the Dean-Stark trap was recycled. The reaction mixture was subjected to cooling and then partitioned between 300 mL of ethyl acetate and 300 mL of water. The phases were separated and the organic phase was washed with water and dried over anhydrous magnesium sulfate. Evaporation of the solvent gave the title compound as a red oil.

EXAMPLE 93 l-Oxyl-2,2,6,6-tetramethylpiperidin-4-yl 2- (2-methoxyethoxy) ethoxyacetate The title compound was synthesized using the same general procedure as described in Example 92 and using 2- Methyl (2-methoxyethoxy) ethoxyacetate instead of methyl 2-methoxyethoxyacetate. The title compound was isolated as a red oil after column chromatography.

Example 94 l-Oxyl-2,2,6,6-tetramethylpiperidin-4-yl methoxyacetate The title compound was synthesized using the same procedure as that described in Example 92 and using methyl methoxyacetate instead of 2- Methyl methoxyethoxyacetate. The title compound was isolated as an orange solid by crystallization from heptane and melted at 103 ° C.

EXAMPLE 95 L-0xyl-2,216,6-tetramethylpiperidin-4-yl methyl succinate A solution of 6.0 g (35 mmol) of l-oxyl-2, 2,6,6-tetramethi-4-hydroxypiperidine and 11.4 g (78 mmol) of dimethyl succinate in 60 mL of heptane was refluxed. 0.05 mL of tetraisopropyl orthotitanate was added and the reaction mixture was refluxed for 16 hours while the methanol involved was trapped in a Dean-Stark trap. The reaction mixture was then concentrated and the title compound was isolated as a red oil after column chromatography and melted at 76 ° C.

EXAMPLE 96 L-Oxyl-2,2,6,6-tetramethylpiperidin-4-yl Acetoacetate The title compound was synthesized using the same procedure as that described in Example 95 but using methyl acetoacetate in place of succinate dimethyl. The title compound was isolated as a red oil after column chromatography.

Example 97 B-l-Oxyl-2,2,6,6-tetramethyl-piperidin-4-yl ethylcarbamate 0.1 g of di-n-butyltin dilaurate were added to a solution of 1.0 g (5.8 mmol) of l-oxyl -2, 2, 6, 6-tetra-methyl-4-hydroxypiperidine and 0.58 g (5.8 mmol) of butyl isocyanate in 10 mL of carbon tetrachloride. After stirring for one hour at room temperature, the solution was concentrated, and the title compound was isolated as a red oil after column chromatography.

Example 98 N- (l-oxyl-2, 2,6,6-tetramethylpiperidin-4-yl) formamide The title compound was prepared according to the procedure of E. J. Vlietstra et al., Macromolecules, 1990, 23, 946.

Example 99 N- (l-Oxyl-21,6,6-tetramethylpipefldin-4-yl) octanamide To a stirred solution at 0 ° C of 1.0 g of l-oxyl-4-amino-2, 2, 6, 6 Tetramethylpiperidine and 0.65 g of triethylamine in 10 mL of methylene chloride were added dropwise to a solution of 0.95 g of octanoyl chloride in 5 L of methylene chloride. After the addition is complete, the reaction mixture is warmed to room temperature. After an additional two hours, the reaction mixture was washed with 1% aqueous sodium hydroxide and finally water. The organic phase was dried over anhydrous magnesium sulfate, filtered and concentrated. The title compound was isolated as a red oil after column chromatography.

Example 100 N- (l-oxyl-2, 2,6,6-tetramethylpiperidin-4-yl) methoxyacetamide The title compound was synthesized using the same general procedure as described in Example 99 and using methoxyacetyl chloride in place of octanoyl chloride. The title compound was isolated as an orange solid after column chromatography and melted at 124-125 ° C.

Example 101 N- (l-Oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) -2-methoxyethoxyacetamide The title compound was synthesized using the same general procedure as that described in Example 99 and 'using methoxyacetyl chloride instead of octanoyl chloride. The title compound was isolated as a red oil or after column chromatography.

Example 102 l-Butyl-3- (l-oxyl-2, 2,6,6,6-tetramethylpiperidin-4-yl) urea To a stirred solution of 1.0 g of l-oxyl-4-amino-2, 2, 6, 6-tetramethylpiperidine in 75 mL of dry toluene was added by dripping 0.65 mL of butyl isocyanate. The reaction mixture was stirred for 16 hours. The solution was then concentrated to obtain the title compound as a red oil.

Example 103 N-Butyl-N- (l-oxyl-2, 2,6,6-tetramethylpiperidin-4-yl) formamide A pressurized reactor was charged with 10 g of 4-butylamino-2, 2, 6, 6 piperidine and 100 mL of ethyl formate and then purged with nitrogen. The reactor was immersed in an oil bath at 100 ° C for three hours. A maximum pressure of 24 psi was observed. The resulting ethanol and unreacted ethyl formate were distilled under vacuum. The intermediate product of N-formyl amine was then oxidized with the corresponding nitroxide as observed below. To a reflux solution of 20 g of the N-formyl amine intermediate and 0.3 g of molybdenum trioxide in 200 mL of methylene chloride, 60 mL of 70% aqueous tert-butyl hydroperoxide were added in 10 mL portions over a period of six hours. The molybdenum catalyst was then removed by filtration. The filtrate was washed with water, dried over anhydrous magnesium sulfate, filtered and concentrated to give the title compound as an orange solid which melted at 77-79 ° C.

Example 104 N-Butyl-N- (l-oxyl-2, 2,6,6-tetramethylpiperidin-4-yl) acetamide To a stirred solution of 95 g of 4-butylamino-2, 2,6,6-tetramethylpiperidine in 500 mL of diethyl ether was added dropwise 50 L of acetic anhydride. After the addition was complete, the reaction mixture was stirred at 0 ° C for one hour and then at 20 ° C for three hours. The resulting precipitate was collected by filtration and washed with diethyl ether until all the orange color was removed. The free amine intermediate was isolated by distributing the solid between aqueous sodium hydroxide and ether. ,. The intermediate product of N-acetylamine was then oxidized to the corresponding nitroxide as follows: To a 50 ° C solution of 13.3 g of N-butyl-N- (2, 2, 6, 6-tetramethylpiper.idin-4-) il) acetamide, 0.075 g of sodium tungstate-dihydrate, and 0.075 g of ethylenediaminetetraacetic acid in 25 mL of methanol, 35 mL of 30% hydrogen peroxide were added over a period of three hours. After the addition was complete, the reaction mixture was stirred for another two hours. The reaction mixture was then partitioned between diethyl ether and water. The organic phase was washed with water, 1% aqueous hydrogen chloride and water. After drying over anhydrous magnesium sulfate and concentrating, the title compound was obtained as a red solid. After crystallization with hexane, the compound melted at 84-85 ° C.

Example 105 N- (l-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) caprolactam This compound was prepared by the method of Example 14 of US Patent No. 4,472,547.

Claims

1. A composition that reduces brightness and increases resistance to yellowing characterized in that it comprises (a) a pulp or paper, which still contains lignin, and (b) an effective stabilizing amount of a hindered amine compound of formula I or II (i) (ll) where Gi and G2 are independently alkyl of 1 to 4 carbon atoms or together are pentamethylene, Zi and Z2 are each methyl, or Zx and Z2 together form a linking portion which may be further substituted by an ester, ether, hydroxy, oxo, cyanohydrin, amide, amino, carboxy or urethane group, E is oxyl; hydroxyl; hydrogen; I rent; alkyl substituted by hydroxyl, oxo or carboxy or interrupted by oxygen or carboxy; alkenyl; alkynyl; cycloalkyl; cycloalkenyl; bicycloalkyl; alkoxy; alkoxy substituted by hydroxyl, oxo or carboxy or interrupted by oxygen or carboxy; cycloalkoxy; alkenyloxy; cycloalkenyloxy, aralkyl; aralkoxy; acyl; R '(C = 0) 0-; R'0 (C = 0) 0-; RfN (C = 0) 0- or chlorine, where R 'is an aliphatic or aromatic portion, X is an inorganic or organic anion, and where the total charge of cations h equals the total charge of anions j, and with the condition that the compound of formula I is not sebacate of bis (2,2,6,6-tetramethylpiperidin-4-yl) or the product of the polycondensation of 1- (2-hydroxyethyl) -2, 2, 6, 6 tetramethyl-4-hydroxypiperidine and succinic acid.

2. The composition according to claim 1, characterized in that in component (b), E is oxyl, hydroxyl, hydrogen, alkyl of 1 to 18 carbon atoms, alkyl of 2 to 12 carbon atoms substituted by one to three hydroxyl or such alkyl interrupted by one to four oxygen atoms, or both alkyls substituted by such hydroxyl groups and interrupted by such oxygen atoms, alkenyl of 2 to 18 carbon atoms, alkynyl of 2 to 12 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, cycloalkenyl of 5 to 12 carbon atoms, bicycloalkyl of 6 to 10 carbon atoms, alkoxy of 1 to 18 carbon atoms, alkoxy of 2 to 12 carbon atoms carbon substituted by one to three hydroxyl groups or such alkoxy interrupted by one to four oxygen atoms or such alkoxy substituted by -COOZ wherein Z is hydrogen or alkyl of 1 to 4 carbon atoms, cycloalkoxy of 5 to 12 carbon atoms, cycloalkenyloxy from 5 to 12 carbon atoms, alkenyloxy of 2 to 18 carbon atoms, aralkyl of 7 to 15 carbon atoms, aralkoxy of 7 to 15 carbon atoms, alkanoyl of 2 to 12 carbon atoms, alkenoyl of 3 to 12 atoms of carbon, benzoyl, or R '(C = 0) 0-, R'0 (C = 0.}. 0-, R'N (C = 0.}. 0-, where R' is alkyl of 1 to 6 carbon atoms or phenyl,

3. The composition according to claim 1, characterized in that in the compound of component (b), X is phosphate, carbonate, bicarbonate, nitr ato, chloro, bromo, bisulfite, sulphite, bisulfate, sulfate, borate, carboxylate, an alkylsulphonate or an arylsulfonate, or a phosphonate.

4. The composition according to claim 1, characterized in that in the compound of component (b), E is oxyl, hydroxyl, alkenyloxy of 2 to 18 carbon atoms, aralkoxy of 7 to 15 carbon atoms, alkoxy of 1 to 18 carbon atoms or alkoxy of 2 to 12 carbon atoms substituted by oxo or interrupted by carboxy; and X is phosphate; carbonate; baking soda; nitrate; chlorine; bromine; bisulfite; sulphite; bisulfate; sulfate; borate; a carboxylate of a mono, di, tri or tetracarboxylic acid; an alkyl sulphonate of 1 to 18 carbon atoms or an aryl sulfonate of 6 to 12 carbon atoms, or a phosphonate.

5. The composition according to claim 1, characterized in that in the compound of component (b), E is oxyl, hydroxyl; and Zi and Z2 are each methyl or together they are a hydrocarbon linking moiety containing 1-200 carbon atoms and 0-60 heteroatoms selected from oxygen atoms and nitrogen atoms.

6. The composition according to claim 1, characterized in that the hindered amine compound of component (b) is selected from the compounds of formulas A to EE and A * and EE * and III to IIIc where E is oxyl, hydroxyl, hydrogen, alkyl of 1 to 18 carbon atoms, alkyl of 2 to 12 carbon atoms substituted by one to three hydroxyl or such alkyl interrupted by one to four oxygen atoms, or both alkyls substituted by such hydroxyl groups and interrupted by such oxygen atoms, alkenyl of 2 to 18 carbon atoms, alkynyl of 2 to 12 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, cycloalkenyl of 5 to 12 carbon atoms, bicycloalkyl of 6 a 10 carbon atoms, alkoxy of 1 to 18 carbon atoms, alkoxy of 2 to 12 carbon atoms substituted by one to three hydroxyl groups or such alkoxy interrupted by one to four oxygen atoms or such alkoxy substituted by -COOZ where Z is hydrogen or alkyl of 1 to 4 carbon atoms, cycloalkoxy of 5 to 12 carbon atoms, cycloalkenyloxy of 5 to 12 carbon atoms, alkenyloxy of 2 to 18 carbon atoms, aralkyl of 7 to 15 carbon atoms, aralkoxy of 7 at 15 ato carbon, alkanoyl of 2 to 12 carbon atoms, alkenoyl of 3 to 12 carbon atoms, benzoyl, or R '(C = 0) 0-, R'0 (C = 0} 0-, R'N (C = 0) 0-, where R 'is alkyl of 1 to 6 carbon atoms or phenyl, R is hydrogen or methyl, in the formulas A and A *, n is 1 or 2 when n is 1, Ri is hydrogen, alkyl of 1 to 18 carbon atoms, alkenyl of 2-18 carbon atoms, propargyl, glycidyl, alkyl of 2 to 50 carbon atoms interrupted by one to twenty oxygen atoms, such alkyl substituted by one to ten hydroxyl groups or both interrupted by such an oxygen atom and substituted by such hydroxyl groups, or Ri is alkyl of 1 to 4 carbon atoms substituted by a carboxy group or by -COOZ where Z is hydrogen, alkyl of 1 to 4 carbon or phenyl atoms, or where Z is such alkyl substituted by - (COO) "nMn + where n is 1-3 and M is a metal ion of the ler, 2nd or 3rd group of the periodic table or is Zn, Cu, Ni or Co, or M is a group Nn + (R2) 4 where R2 is alkyl of 1 to 8 carbon atoms or benzyl, when n is 2, Ri is alkylene of 1 to 12 carbon atoms, alkenylene of 4 to 12 carbon atoms AC rbonone, xylylene or alkylene of 1 to 50 carbon atoms interrupted by one to twenty oxygen atoms, substituted by one to ten hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, in formula B and B * , m is 1 to 4, when m is 1, R 2 is alkyl of 1 to 18 carbon atoms, alkyl of 3 to 18 carbon atoms interrupted by -COO-, alkyl of 3 to 18 carbon atoms substituted by COOH or COO -, or R2 is -CH2 (OCH2CH2) n0CH3 wherein n is 1 to 12, or R2 is cycloalkyl of 5 to 12 carbon atoms, aryl of 6 to 12 carbon atoms, or such aryl substituted by no to four alkyl groups from 1 to 4 carbon atoms, or R2 is -NHR3 where R3 is alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aryl of 6 to 12 carbon atoms, or such aryl substituted by one to four alkyls of 1 to 4 carbon atoms, or R2 is -N (R3) 2 where R3 is as defined above, when m is 2, R2 is alkylene from 1 to 12 carbon atoms, alkenylene of 4 to 12 carbon atoms, xylylene, alkylene of 2 to 12 carbon atoms interrupted by -COO-, alkylene of 3 to 18 carbon atoms substituted by COOH or COO-, or R2 is -CH2 (OCH2CH2) nOCH2- where n is 1 to 12, or R2 is cycloalkylene of 5 to 12 carbon atoms, aralkylene of 7 to 15 carbon atoms or arylene of 6 to 12 carbon atoms, or R2 is -NHR4NH - where R4 is alkylene of 2 to 18 carbon atoms, cycloalkylene of 5 to 12 carbon atoms, aralkylene of 8 to 15 carbon atoms or arylene of 6 to 12 carbon atoms, or R2 is -N (R3) R4N ( R3) - where R3 and R4 are as defined above, or R2 is -CO- or -NH-CO-NH-, when m is 3, R2 is C3 to C8 or beneentriyl, or when m is 4, R2 is alkentetrail of 5 to 8 carbon atoms or bencentetrail, in formulas C and C *, Rio is hydrogen, alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, alkanoyl of 2 to 18 carbon atoms, alkenoyl of 3 to 5 carbon atoms or benzoyl, x is 1 or 2, when x is 1, Rn is hydrogen, alkyl of 1 to 18 carbon atoms, alkenyl of 2 to 18 carbon atoms, propargyl, glycidyl, alkyl of 2 to 50 carbon atoms interrupted by one to twenty carbon atoms. oxygen, such alkyl substituted by one to ten hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or Rn is alkyl of 1 to 4 carbon atoms substituted by a carboxy group or by -COOZ where Z is hydrogen , alkyl of 1 to 4 carbon atoms or phenyl, or where Z is such alkyl substituted by - (COO ~) nMn + where n is 1-3 and M is a metal ion of the ler, 2nd or 3rd group of the periodic table or is Zn, Cu, Ni or Co, or M is a group Nn + (R2) 4 where R2 is hydrogen, alkyl of 1 to 8 carbon atoms or benzyl, or when x is 2, Rn is alkylene of 1 to 12 carbon atoms, alkenylene of 4 to 12 carbon atoms, xylylene or alkylene of 1 to 50 carbon atoms interrupted by one to twenty oxygen atoms, substituted by one to ten hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, in formulas D and D *, Rio is as defined above, and is 1 to 4, and R12 is as defined as R2 above, in the formulas E and E *, k is 1 or 2, when k is 1 R20 and R21 are independently alkyl of 1 to 12 carbon atoms, alkenyl of 2 to 12 carbon atoms or aralkyl of 7 to 15 carbon atoms, or R20 is also hydrogen, or R20 and R21 together are alkylene of 2 to 8 carbon atoms or such alkylene substituted by hydroxyl, or are acyloxy-alkylene of 4 to 22 carbon atoms, or when k is 2 R20 and R21 together are (-CH2) 2C (CH2-) 2, in formulas F and F *, R30 is hydrogen, alkyl of 1 to 18 a atoms of carbon, benzyl, glycidyl, or alkoxyalkyl of 2 to 6 carbon atoms, g is 1 or 2, when g is 1, R31 is as defined as Rx above when n is 1 when g is 2, R31 is as defined as Ri above when n is 2, in the formulas G and G *, Ex is alkylene of 1 to 3 carbon atoms, or E% is -CH2-CH (R42) -0- where R2 is hydrogen, methyl or phenyl , or Ei is - (CH2) 3-NH- or Ei is a direct bond, R4o is hydrogen or alkyl of 1 to 18 carbon atoms, R41 is hydrogen, alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms, or R4 ?, is -CH2-CH (R42) -OH where R42 is as defined above in formulas H and H * p is 1 or 2, T4 is as defined for Rp when x is 1 or 2, M and Y are independently methylene or carbonyl, preferably M is methylene and Y is carbonyl, in formulas I and 1 *, this formula denotes a united Recurrent structural d of a polymer where Tx is ethylene or 1,2-propylene or is the repeating structural unit derived from an alpha-olefin copolymer with alkyl acrylate derived from methacrylate, and where q is 2 to 100, Qi is -N (R4?) - or -0- where R4i is as defined above in the formulas J and J * r is 1 or 2, T7 is as defined for Ri when n is 1 or 2 in the formula A, in the formulas L and L *, u is 1 or 2, T13 is as defined for Ri when n is 1 or 2 in formula A, with the proviso that T? 3 is not hydrogen when u is 1, in formulas M and * , Ei and E2, are different, each is -CO- or -N (E5) -where E5 is hydrogen, alkyl of 1 to 12 carbon atoms or alkoxycarbonylalkyl of 4 to 22 carbon atoms, E3 is hydrogen, 1 to 30 carbon atoms, phenyl, naphthyl, such phenyl or such naphthyl substituted by chloro or by alkyl of 1 to 4 carbon atoms, or phenylalkyl of 7 to 12 carbon atoms, or such substituted phenylalkyl by alkyl of 1 to 4 carbon atoms, E4 is hydrogen, alkyl of 1 to 30 carbon atoms, phenyl, naphthyl or phenylalkyl of 7 to 12 carbon atoms, or E3 and E4 together are polymethylene of 4 to 17 carbon atoms, or such polymethylene substituted by one to four alkyl of 1 to 4 carbon atoms, preferably methyl , in the formulas N and N *, Ri is as defined for Ri in the formula A when n is 1, G3 is a direct bond, alkylene of 1 to 12 carbon atoms, phenylene or -NH-Gi-NH- where Gi is alkylene of 1 to 12 carbon atoms, in formulas 0 and 0 * Rio is as defined for Ri0 in formula C, in formulas P and P *, E6 is a radical. tetravalent aliphatic or aromatic, preferably neopentantenyl or benzetranyl, in the formulas T and T *, Rsi is hydrogen, alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, or aryl of 6 a 10 carbon atoms carbon, R5 is hydrogen or alkyl of 1 to 18 carbon atoms, or R51 and R52 together of alkylene of 4 to 8 carbon atoms, f is 1 or 2, when f is 1, R5o is as defined for Rn in the formula C when x is 1, or R0 is - (CH2) 2COOR54 where z is 1 to 4 and R54 is hydrogen or alkyl of 1 to 18 carbon atoms, or 54 is a metal ion of the first, second or third group of the periodic table or a group -N (R5s) 4 where R55 is hydrogen, alkyl of 1 to 12 carbon atoms or benzyl, when f is 2, R50 is as defined for Rp in the formula C when x is 2, in the formulas U and U *, R53, R5, R55 and R56 are independently alkyl of 1 to 4 carbon atoms or together are pentamethylene. In the formulas V and V *, R57, s8, R59 and Rdo are independently alkyl of 1 to 4 carbon atoms or together are pentamethylene in the formulas W and W *, Rsi / ß2r d4 and Rd5 are independently alkyl of 1 to 4 carbon atoms or together are pentamethylene, R65 is alkyl of 1 to 5 carbon atoms, M is hydrogen or oxygen, where in formulas X to CC and X * to CC * n is 2 to 3, Gi is hydrogen, methyl, ethyl, butyl or benzyl, m is 1 to 4, x is 1 to 4, when x is 1, Ri and R2 are independently alkyl of 1 to 18 carbon atoms, such alkyl interrupted by one to five oxygen atoms, such alkyl substituted by 1 to 5 hydroxyl groups or such of both alkyls interrupted by such oxygen atoms and substituted by such hydroxyl groups; cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or such an aryl substituted by one to three alkyl of 1 to 8 carbon atoms, or Rj, is also hydrogen, or Rx and R2 together are tetramethylene, pentamethylene, hexamethylene or 3-oxapentamethylene, when x is 2, Ri is hydrogen, alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or such of both alkyls interrupted by one or two oxygen atoms and substituted by a hydroxyl group, R 2 is alkylene of 2 to 18 carbon atoms, such alkylene interrupted by one to five oxygen atoms, such alkylene substituted by 1 to 5 hydroxyl groups or such alkylene both interrupted by such oxygen atoms and substituted by such hydroxyl groups; o-, m- or p-phenylene or such phenylene substituted by one or two alkyl of 1 to 4 carbon atoms, or R2 is - (CH2) icO [(CH2) kO] h (CH2) k- where k is 2 a 4 and h is 1 to 40, or Ri and 2 together with the two N atoms to which they are attached are piperazin-1, -diyl, when x is 3, Ri is hydrogen, R2 is alkylene of 4 to 8 atoms of carbon interrupted by a nitrogen atom, when x is 4, Ri is hydrogen, R 2 is alkylene of 6 to 12 carbon atoms interrupted by two nitrogen atoms, R 3 is hydrogen, alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or both interrupted by one or two oxygen atoms and substituted by a hydroxyl group, p is 2 or 3, and Q is an alkali metal, ammonium salt or N + (G?) 4, in the formulas DD and DD * m is 2 or 3, when m is 2, G is (CH2CHR-0) rCH2CHR-, where r is 0 to 3, and R is hydrogen or methyl, and when m is 3, G is glyceryl, and n the formulas EE and EE * G2 is -CN, -CONH2 or -COOG3 where G3 is hydrogen, alkyl of 1 to 18 carbon atoms or phenyl, X is an an inorganic or organic anion, where the total charge of cations h is equal to the total charge of anions j, and with the proviso that the sebacate of bis (2, 2, 6, 6-tetramethylpiperidin-4-yl) or the product of the polycondensation of 1- (2-hydroxyethyl) -2, 2, 6, 6-tetramethyl-4-hydroxypiperidine and succinic acid are excluded; and where in formulas III to Ule A11 is OR101 or NRU? RU2 R101, it is alkenyl of 2 to 4 carbon atoms, propargyl, glycidyl, alkyl of 2 to 6 carbon atoms interrupted by one or two oxygen atoms, substituted by one to three hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or R101 is alkyl of 1 to 4 carbon atoms substituted by carboxy or by the alkali metal, ammonium or alkylammonium salts of C? -C4 of the same; or R101 is alkyl substituted by -COOE10 where En is methyl or ethyl, R? o2 is alkyl of 3 to 5 carbon atoms interrupted by -COO- or by -CO, or R102 is -CH2 (OCH2CH2) cOCH3 where c is 1 to 4; or R102 is -NHR103 where R? o3 is alkyl of 1 to 4 carbon atoms, a is 2 to 4, when a is 2, u is (CH2CHR? 0o-0) dCH2CHR? oo- where d is 0 or 1, and Rioo is hydrogen or methyl, when a is 3, Tu is glyceryl, when a is 4, Tu is a neopentantenyl, b is 2 or 3, when b is 2, Gn is (CH2CHR? oo-0) eCH2CHR? oa-, where e is 0 to 3, and Rioo is hydrogen or methyl, and when b is 3, Gn is glyceryl; Rui is hydrogen, alkyl of 1 to 4 carbon atoms, or such alkyl substituted by one or two hydroxyl, interrupted, by one or two oxygen atoms, or both substituted by a hydroxyl and interrupted by one or two oxygen atoms, R112 is -CO-Rn3 where Rn3 has the same meaning as Rui, or Ru3 is -NHRn4 where Ru4 is alkyl of 1 to 4 carbon atoms, such alkyl substituted by one or two hydroxyl, substituted by alkoxy of 1 to 2 carbon atoms , or both alkyls substituted by a hydroxyl and by an alkoxy of 1 to 2 carbon atoms, or Rm and Rli2 together are -CO-CH2CH2-CO-, -CO-CH-CH-CO- or - (CH2) 6-C0-; and with the proviso that, when Ru3 is alkyl of 1 to 4 carbon atoms, Rm are not hydrogen. The composition according to claim 6, characterized in that the compound of component (b) is selected from the compounds of formulas A, A *, B, B *, C, C *, D, D *, Q, Q *, R, R *, S, S *, X, X *, Y, Y *, Z and z *, where E is oxyl or hydroxyl, and R is hydrogen, in the formulas A and A * n is 1 or 2 , when n is 1, Ri is hydrogen, alkyl of 1 to 6 carbon atoms, alkenyl of 2-6 carbon atoms, propargyl, glycidyl, alkyl of 2 to 20 carbon atoms interrupted by one to ten oxygen atoms, such alkyl substituted by one to five hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or Ri is alkyl of 1 to 4 carbon atoms substituted by a carboxy group or by -COOZ wherein Z is hydrogen or alkyl of 1 to 4 carbon atoms, when n is 2, Ri is alkylene of 1 to 8 carbon atoms, alkenylene from 4 to 8 carbon atoms, alkylene of 1 to 20 carbon atoms interrupted by one to ten oxygen atoms, substituted by one to five hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, in the formulas B and B * m is 1 or 2 when m is 1, R 2 is alkyl of 1 to 4 carbon atoms or R 2 is CH 2 (OCH 2 CH 2) nOCH 3 wherein n is 1 to 12, or R 2 is phenyl, or such phenyl substituted by one to three methyl groups, R2 is -NHR3 where R3 is alkyl of 1 to 4 carbon atoms or phenyl, or such phenyl substituted by one or two methyl groups, when m is 2, R2 is alkylene of 1 to £ carbon atoms, alkenylene of 4 to 8 carbon atoms, or R2 is -CH2 (0CH2CH2) p0.CH2- where n is 1 to 12, or R2 is NHR4NH where R4 is 2 to 6 carbon atoms, aralkylene of 8 to 15 carbon atoms or arylene of 6 to 12 carbon atoms, or R2 is -CO- or -NHCONH, in formulas C and C *, Rio is hydrogen or, alkanoyl of 1 to 3 carbon atoms, x is 1 or 2 when x is 1, Rii is hydrogen, alkyl of 1 to 6 carbon atoms or glycidyl, Rii is alkyl of 1 to 4 carbon atoms substituted by a carboxy group or by COOZ where Z is hydrogen or alkyl of 1 to 4 carbon atoms, when x is 2, Rii is alkylene of 1 to 6 carbon atoms, in formulas D and D * Rio is hydrogen, and is 1 or 2, R12 as defined R2 above, in the formulas Y, Y *, Z and Z *, x is 1 or 2, when x is 1, Ri and R2 are independently alkyl of 1 to 4 carbon atoms, or Ri and R2 together are tetramethylene, or pentamethylene , R 2 is hydrogen or alkyl of 1 to 4 carbon atoms, such alkyl group substituted by a hydroxyl group, when x is 2, Ri is hydrogen, alkyl of 1 to 4 carbon atoms, such alkyl or substituted by a hydroxyl groups, R 2 is alkylene of 2 to 6 carbon atoms, R 3 is as defined above. The composition according to claim 7, characterized in that the compound of component (b) is selected from the compounds of formulas A, A *, B, B *, C, C *, D, D *, Q, Q *, R and R *, where E is oxy or hydroxyl, R is hydrogen, in the formulas A and A *, h is 1, Ri is hydrogen, alkyl of 1 to 4 carbon atoms, glycidyl, alkyl of 2 to 4 carbon atoms interrupted by one or two oxygen atoms, such alkyl substituted by one or two hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or Ri is alkyl of 1 to 4 carbon atoms substituted by - COOZ wherein Z is hydrogen or alkyl of 1 to 4 carbon atoms, in formulas B and B *, m is 1 or 2, R2 is alkyl of 1 to 4 carbon atoms or R2 is CH2 (OCHCH2) nOCH3 where n is 1 to 4, when m is 2, R 2 is alkylene of 1 to 8 carbon atoms, in formulas C and C *, Rio is hydrogen or alkanoyl of 1 or 2 carbon atoms, x is 1 or 2, when x is 1, Ru is hydrogen, alkyl of 1 to 4 carbon atoms or glycidyl, Rii is alkyl of 1 to 4 carbon atoms substituted by COOZ where Z is hydrogen or alkyl of 1 to 4 carbon atoms, when x is 2, Rii is alkylene of 1 to 6 carbon atoms, in formulas D and D *, Rio is hydrogen, and is 1 or 2, R? 2 is as defined above R2. 9. The composition according to claim 6, characterized in that the compound of component (b) is (a) bis (l-oxyl-2, 2-6-6-tetramethylpiperidin-4-yl) sebacate.; (b) bis (l-hydroxy-2, 2-6-6-tetramethylpiperidin-4-yl) sebacate; (c) l-hydroxy-2-, 2-6-6-tetramethyl-4-acetoxypiperidinium citrate; (d) l-oxyl-2,2,6,6-tetramethyl-4-acetamidopiperidine; (e) l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamido-piperidine; (f) l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetamidopiperidinium bisulfate; (g) l-oxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidine; (h) l-hydroxy-2, 2,6,6,6-tetramethyl-4-oxo-piperidine; (i) l-hydroxy-2, 2, 6,6-tetramethyl-4-oxo-piperidinium acetate; (j) l-oxyl-2, 2,6,6,6-tetramethyl-4-methoxy-piperidine; (k) l-hydroxy-2, 2,6,6,6-tetramethyl-4-methoxy-piperidine; (1) l-hydroxyl-2, 2,6,6,6-tetramethyl-4-methoxy-1-pyridinium acetate; (m) l-oxyl-2, 2, 6, d-tetramethyl-4-acetoxypiperidine; (n) l-hydroxy-2, 2,6,6,6-tetramethyl-4-acetoxypiperidine; (o) l-oxyl-2, 2,6,6,6-tetramethyl-4-propoxy-piperidine; (p) l-hydroxy-2, 2,6,6,6-tetramethyl-4-propoxy-piperidinium acetate; (q) l-hydroxy-2, 2, 6, 6-tetralmethyl-4-propoxy-piperidine; (r) l-oxyl-2,2,6,6-tetramethyl-4- (2-hydroxy-4-oxapentoxy) piperidine; (s) l-hydroxy-2, 2, 6,6-tetramethyl-4- (2-hydroxy-4-oxapentoxy) piperidinium actate; (t) l-oxyl-2, 2,6,6,6-tetramethyl-4-hydroxypiperidine; (u) l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxy-piperidine; (v) l-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium chloride; (w) l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium acetate; (x) l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium bisulfate; (y) l-hydroxy-2, 2, 6, 6-tetramethyl-4-hydroxypiperidinium citrate; (z) bis (l-hydroxy-2, 2,6,6,6-tetramethyl-4-hydroxypiperidinium citrate); (aa) citrate of tris (l-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidinium; tetra (1-hydroxy-2,2,6,6-tetramethyl-4-hydroxypiperidinium) (bb) ethylenediaminetetraacetate) (ce) ethylenediaminetetraacetate tetra (1-hydroxy-2,2,6,6-tetramethyl-4-acetamidopiperidinium); (dd) ethylenediaminetetraacetate tetra (1-hydroxy-2,2,6,6-tetramethyl-4-) oxopiperidinium); (ee) penta diethylenetriaminepentaacetate (1-hydroxy-2, 2, 6, 6-tetramethyl-4-hydroxypiperidinium); (ff) pentadiethylenetriaminepentaacetate (1-hydroxy-2, 2, 6, 6-tetramethyl- 4-acetarnidopiperidinium); (gg) penta diethylenetriaminepentaacetate (1-hydroxy-2, 2,6,6-tetramethyl-4-oxopiperidinium); (hh) nitrilotriacetate of tri (1-hydroxy-2, 2, 6, 6 tetramethyl-4-hydroxypiperidinium); (ii) tri (1-hydroxy-2,2,6,6-tetramethyl-4-acetamidopiperidinium nitrilotriacetate); (jj) tri (1-hydroxy-2, 2, 6, 6-tetramethyl-4-oxopiperidinium nitrilotriacetate); (kk) penta diethylenetriaminepentamethylenephosphonate (1-hydroxy-2, 2,6,6-tetramethyl-4-hydroxypiperidinium); (11) penta diethylenetriaminpentamethylenephosphonate (l-hydroxy-2,2,6,6-tetramethyl-4-acetamidopiperidinium); (mm) penta diethylenetriaminpentamethylenephosphonate (l-hydroxy-2, 2,6,6-tetramethyl-4-oxopiperidinium). The composition according to claim 1, characterized in that the effective amount of the hindered amine compound of component (b) is 0.001 to 5% by weight based on the pulp or paper. 11. The composition according to claim 1, characterized in that it also includes an effective stabilizing amount of at least one coadjutor selected from the group consisting of ÜV absorbers, polymeric inhibitors, fluorescent whitening agents and metal chelating agents and mixtures of the same . 12. A compound of formula 11 Id, Ule, IV, V, VI, VII or VIII characterized in that in formulas Illd and lile Bu is OE9 or NE? EX2 Eg is alkyl of 2 to 6 carbon atoms interrupted by one or two oxygen atoms, substituted by two to three hydroxyl groups or both interrupted by such oxygen atoms and substituted by such hydroxyl groups, or Eg is alkyl of 1 to 4 carbon atoms substituted by carboxy or by the alkali metal, ammonium or lower alkylammonium salts thereof; or E9 is alkyl substituted by -COOEio where Ei0 is methyl or ethyl, and E8 is alkyl of 3 to 5 carbon atoms interrupted by -COO- or by -CO-, or E8 is -CH2 (OCH2CH2) aOCH3 where a is 1 to 4; or E8 is -NHE7 where E7 is alkyl of 1 to 4 carbon atoms; In is hydrogen or alkyl of 1 to 4 carbon atoms, and E? 2 is -CO-E? 3 where E? 3 is alkyl of 1 to 4 carbon atoms alkyl which is interrupted by one or two oxygen atoms, or Ei3 is -NHEi4 where E? 4 is alkyl of 1 to 4 carbon atoms; with the proviso that Eg is not 2, 3-dihydroxypropyl, and where in formulas IV, V, VI, VII and VIII n is 2 to 3, Gi is hydrogen, methyl, ethyl, butyl or benzyl, X is an inorganic anion or organic, m is 1 to 4, x is 1 to 4, when x is 1, Ri and R2 are independently alkyl of 1 to 18 carbon atoms, such alkyl interrupted by one to five oxygen atoms, such alkyl substituted by 1 to 5 hydroxyl groups or such of both alkyls interrupted by such oxygen atoms and substituted by such hydroxyl groups; cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or such an aryl substituted by one to three alkyl of 1 to 8 carbon atoms, or Rx is also hydrogen, or Ri and R2 together are tetramethylene, pentamethylene, hexamethylene or 3-oxapentamethylene, when x is 2, Ri is hydrogen, alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a group hydroxyl, or such of both alkyls interrupted by one or two oxygen atoms and substituted by a hydroxyl group, R 2 is alkylene of 2 to 18 carbon atoms, such alkylene interrupted by one to five oxygen atoms, such alkylene substituted by 1 to 5 hydroxyl groups or such alkylene, both interrupted by such oxygen atoms and substituted by such hydroxyl groups; o-, m- or p-phenylene or such phenylene substituted by one or two alkyl of 1 to 4 carbon atoms, or R2 is - (CH2) k0 [(CH2) O) h (CH2) k- where k is 2 a 4 and h is 1 to 40, or Ri and 2 together with the two N atoms to which they are attached are piperazin-1,4-diyl, when x is 3, Ri is hydrogen, R2 is alkylene of 4 to 8 carbon atoms interrupted by a nitrogen atom, when x is 4, Ri is hydrogen, R 2 is alkylene of 6 to 12 carbon atoms interrupted by two nitrogen atoms, R 3 is hydrogen, alkyl of 1 to 8 carbon atoms, alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or both interrupted by one or two oxygen atoms and substituted by a hydroxyl group, p is 2 or 3, and Q is an alkali metal salt, ammonium or N + (G?) 4. The compound according to claim 12, characterized in that in the compounds of formulas IV and VIII n is 2; Gi is hydrogen or methyl; X is chlorine or bromine; x is 1 or 2, Ri and R2 are independently alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or such of both alkyls interrupted by one or two atoms of oxygen and substituted by a hydroxyl group, or Ri is hydrogen; or Ri and R2 together are 3-oxa-pentamethylene; R3 is hydrogen or alkyl of 1 to 2 carbon atoms, or such alkyl substituted by a hydroxyl group, p is 2, is 1, and Q is Na +, NH4 + or N (CH3) 4+. 14. A hydroxylamine salt of formulas A * D * X * Y * z *, AA *, BB *, CC * or DD * R is hydrogen, in the formula A * characterized in that n is 1, Ri is hydrogen or alkyl of 1 to 4 carbon atoms, preferably hydrogen, in the formula D * and is 1, Rio is hydrogen or methyl, so preferably hydrogen, R12 is alkyl of 1 to 4 carbon atoms, preferably methyl, x is phosphate, phosphonate, carbonate, bicarbonate, nitrate, chlorine, bromine, bisulfite, sulfite, bisulfate, sulfate, borate, formate, acetate, benzoate , citrate, oxalate, tartrate, acrylate, polyacrylate, fumarate, maleate, itaconate, glycolate, gluconate, malate, mandelate, tiglato, ascorbate, polymethacrylate, a nitrilotriacetic acid carboxylate, hydroxyethylethylenediaminetriacetic acid, ethylenediaminetetraacetic acid or diethylenetriaminepentaacetic acid, a diethylenetriaminepentamethylenephosphonate, an alkylsulphonate or an arylsulphonate where the total charge of cations h is equal to the total charge of anions j, where in formulas X * to DD * n is 2 to 3, Gi is hydrogen, methyl, ethyl, butyl or benzyl, m is 1 to 4, x is 1 to 4, when x is 1, Ri and R2 are independently alkyl of 1 to 18 carbon atoms, such alkyl interrupted by one to five oxygen atoms, such alkyl substituted by 1 to 5 hydroxyl groups or such of both alkyls interrupted by such oxygen atoms and substituted by such hydroxyl groups; cycloalkyl of 5 to 12 carbon atoms, aralkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or such an aryl substituted by one to three alkyl of 1 to 8 carbon atoms, or Ri is also hydrogen, or Ri and R2 together are tetramethylene, pentamethylene, hexamethylene or 3-oxapentamethylene, when x is 2, Ri is hydrogen, alkyl of 1 to 8 carbon atoms, such alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a group hydroxyl, or such of both alkyls interrupted by one or two oxygen atoms and substituted by a hydroxyl group, R 2 is alkylene of 2 to 18 carbon atoms, such alkylene interrupted by one to five oxygen atoms, such alkylene substituted by 1 to 5 hydroxyl groups or such alkylene both interrupted by such oxygen atoms and substituted by such hydroxyl groups; o-, m- or p-phenylene or such phenylene substituted by one or two alkyl of 1 to 4 carbon atoms, or R2 is - (CH2) kO [(CH2) kO] h (CH2) k- where k is 2 a 4 and h is 1 to 40, or Ri and 2 together with the two N atoms to which they are attached are piperazin-1,4-diyl, when x is 3, Ri is hydrogen, R2 is alkylene of 4 to 8 carbon atoms interrupted by a nitrogen atom, when x is 4, Ri is hydrogen, R 2 is alkylene of 6 to 12 carbon atoms interrupted by two nitrogen atoms, R 3 is hydrogen, alkyl of 1 to 8 carbon atoms, alkyl interrupted by one or two oxygen atoms, such alkyl substituted by a hydroxyl group, or both interrupted by one or two oxygen atoms and substituted by a hydroxyl group, p is 2 or 3, and Q is an alkali metal salt, ammonium or N + (G?) 4, in the formulas DD and DD * m is 2 or 3, when m is 2, G is - (CH2CHR-0) rCH2CHR-, where r is from 0 to 3, and R is hydrogen or methyl, and when m is 3, G is glyceri it, with the proviso that in the formula A * when Ri is hydrogen, X is not chlorine or bisulfate, and when in the formulas D * when Rio is hydrogen and R? 2 is methyl, X is not chlorine or bisulfate. 15. A process to prevent the loss of brilliance and to improve resistance to yellowing of pulp or chemomechanical or thermomechanical paper, which additionally contains lignin, characterized in that it comprises treating such pulp or paper with an effective stabilizing amount of a compound of formula I or II according to claim 1. 16. The process according to claim 15, characterized in that in the compound of formula I, E is oxyl or hydroxyl. 1

7. The process according to claim 15, characterized in that the compound of formula I or II is one of formula A to EE or A * to EE * or III to lile in accordance with claim 6. 1

8. The use of a compound of formula I or II according to claim 1, for treating a chemimechanical or thermomechanical pulp or paper, which additionally contains lignin, against the loss of brightness and for improving resistance to yellowing.