GB2377935A - Sterically hindered amine compounds - Google Patents

Abstract

A product of the formula (XIII) <EMI ID=1.1 HE=61 WI=155 LX=278 LY=596 TI=CF> <PC>in which<BR> R<SB>36</SB>, R<SB>37</SB>, R<SB>38</SB>, R<SB>39</SB> and R<SB>40</SB> independently of one another are a direct bond or C<SB>1</SB>-C<SB>10</SB>alkylene, the radicals R<SB>41</SB> independently of one another are hydrogen, C<SB>1</SB>-C<SB>8</SB>alkyl or C<SB>1</SB>-C<SB>20</SB>acyl with 5 to 85 % of the radicals R<SB>41</SB> independently of one another being hydrogen or C<SB>1</SB>-C<SB>8</SB>alkyl and the remaining radicals R<SB>41</SB> being C<SB>1</SB>-C<SB>20</SB>acyl, and<BR> n<SB>7</SB> is a number from 1 to 50. The product finds use as a stabilizer of organic materials, in particular synthetic polymers, against the effects of light, heat and oxidation.

Description

A-21885/AJCHM 108

- 1 Sterically hindered amine compounds The present invention relates to products containing 1-(C'-C Oacyl)-2,2,6,6-tetramethyl-4-

piperidyl groups as well as 2,2,6,6-tetramethyl-4-piperidyl groups the latter of which may optionally be substituted on the piperidyl nitrogen by C,-C8alkyl, to the use of these products as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials, particularly synthetic polymers, and to the organic materials thus stabilized.

2,2,6,6-tetramethylpiperidine derivatives are, for example, disclosed in EP-A-209,126, EP-A-849,327, DE-A-2,718,458 (= US-A-4,293,468 and US-A-4, 369,275), DE-A-2,755,340 (= US-A-4,238,613), EP-A-52,579 (_ US-A-4,419, 472), EP-A-107,805, DE-A-3,403,116

(= US-A-4,532,279), US-A-4,670,488 and US-A-4,948,889.

In detail, the present invention relates to a product containing 5to85%, forexample15to85%,15to80%,15to75%or5to75%, 15to70%or 20to70%,15to60%, 20to60%,30to60%,25to50%,40to60%or50%ofagroup (A-1-a) and/or (A-1-b) H CH3 <7<N-H (A-1-a) H3C CH3

H3C CH3

N-C,-C8a kyl (A-1-b) H3C CH3

andl5to95%,forexample15to85%,20to85%,25to85%or25to95 /e,,30to85% or30to80%,40to85%,40to80%,40to70%or50to75%,40to60%or50%ofa group (A-2), H3C CH3

IN-C4-czoacyl (.-2) my< H3C CH3

the total sum of the groups (A-1 -a), (A-1 -b) and (A-2) being 100 %.

- 2 A product which corresponds to the formula (1) as defined under a), the formula (11) as defined under b), the formula (V) as defined under c), the formula (Vl) as defined under d), the formula (Vu) as defined under e), a reaction product as defined under f), or which corresponds to the formula (IX) as defined under g), the formula (X) as defined under h), the formula (Xl) as defined under i), the formula (Xll) as defined under j), the formula (X111) as defined under k), the formula (XIV) as defined under 1), the formula (XVI) as defined under m), the formula (XVII) as defined under n), the formula (XV111) as defined under o) or the formula (XIX) as defined under p) is preferred.

a) a product mixture of the formula R. it) O --C- R2 (1) H3C CH3 n 1 in which the radicals R. independently of one another are hydrogen, C,caalkyl or C,-C20acyl with 5 to 85 % of the total sum of the radicals R. independently of one another being hydrogen or C,-C alkyl and the remaining radicals R. being C,-C20acyl; n, is20r4, if n, is 2, R2 is C,-C, 4alkylene or bis{(C,-C20alkyi)oxycarbonyl}C4-C,Oalkanetetrayl, and if n, is 4, R2 is C4-C,Oalkanetetrayl, b) a product mixture of the formula IN R4 N Rs N R6 Nit X8 N I N R3 Ned\ N N R7 N N X,J X4 X/: X6

(11) in which

- 3 R3 and R7 independently of one another are hydrogen or C,-C,zalkyl, RJ., Rs and R6 independently of one another are C2-C,Oalkylene, and X,, X2, X3, X4, X5, X6, X7 and Xa independently of one another are a group of the formula (111), H4<CH3

-Nl Rg (111) H3C CH3

in which R8 is hydrogen, C,-C,2alkyl, Cs-C 2cycloalkyl, C,-C4alkylsubstituted Cs-C,2cycloalkyl, phenyl, -OH- and/or C,-C,0alikylsubstituted phenyl, C7-Cgphenylalkyl, C7-Cgphenylalkyl which is substituted on.the phenyl radical by -OH and/or C,-C,Oalkyl; or a group of the formula (IV), H3C CH3

N-Rho (IV) H3C CH3

and the radicals Rg and R,o independently of one another are hydrogen, C,C8alkyl or C,-C20acyl with 5 to 85 % of the total sum of the radicals Rg and Rio independently of one another being hydrogen or C,-C3alkyl and the remaining radicals Rg and Rio being C,-C20acyl; c) a product mixture of the formula Xg\:N Xi, (V) NON x1o in which Xg, X,0 and X,, independently Of one another are a group of the formula (111) with 5 to 85 % of the total sum of the radicals Rg and Rue independently of one another being hydrogen or C,-C8alkyl and the remaining radicals Rg and Rio being C,C:Oacyl;

d) --I R,2 - I / (Vl) R11 R13 NOUN

N R15 R14 in which R.,, R,3, R,4 and R,s independently of one another are hydrogen, C -C,2alkyl, Cs-C,2cycloalkyl, C -C4alkyl-substituted Cs-C 2cycloalkyl, phenyl, -OH- and/or C,-C Oalkyl substituted phenyl, C7Cgphenylalkyl, C7-C phenylaikyl which is substituted on the phenyl radical by -OH and/or C'-C,Oalkyl; or a group of the formula (IV), R,2 is C2-C, alkylene, Cs-C7cycloalkylene or C'-C4alkylenedi(Cs-C7cycloalkylene), or the radicals Rig, R,2 and R,3, together with the nitrogen atoms to which they are attached, form a 5- to 1 0-membered heterocyclic ring, or Rat and R,s, together with the nitrogen atom to which they are attached, form a 5to 10 membered heterocyclic ring, n2 is a number from 2 to 50, and at least one of the radicals R.,, R,3, Ret and R,s is a group of the formula (IV) with 5 to 85 % of the radicals Rio independently of one another being hydrogen or C -C8alkyi and the remaining radicals Rio being C -C20acyl;

- 5 e) I i O (Vu) H3C/ N CH3

_ n3 in which R,6 is C -C,Oalkyl, Cs-C'2cycloalkyl, C,-C4alkylsubstituted Cs-C,2cycloalkyl, phenyl or C,-C10alkyl-substituted phenyl, R, 7 is C3-C,Oalkylene, the radicals Rj8 independently of one another are hydrogen, C,-C8alkyi or C'-C20acyl with 5 to 85 % of the radicals Rye independently of one another being hydrogen or C -C8alkyl and the remaining radicals R,8 being C,-C20acyl, and n3 is a number from 2 to 50; f) a product obtainable by reacting a compound, obtained by reaction between a polyamine of the formula (Villa) and cyanuric chloride, with a compound of the formula (Vlilb) or a mixture of the compounds (Vlilb) and (Vlilb*) to give an intermediate H2N (CH2) -NH (CH2),, NH (CH2)-NH2 (Vii la) H N R19 (Vlilb), H-N Rig (Vlllb*) H3C CH3 H3C CH3

H3C IN CH3 H3C IN CH3

H R20

in which

- 6 n'4, n"4 and n"'4 independently of one another are an integer from 2 to 12, Rig is hydrogen, C,-C 2alkyl, Cs-C,2cycloalkyl, phenyl or C7Cgphenylalkyl, and R20 is C'-C8alkyl, with the proviso that in the mixture of the compounds (Vlllb) and (Vlilb*) at least 15 % of the compound (Vlilb) is present; and subsequent acylation of the groups of the formula (A-1-a) being present in the intermediate H3C CH3

IN-H (A-1-a) H3C CH3

in a proportion to give a product which contains 15 to 95 % of the groups of the formula (A-2) H3C CH3

IN - c,-c20acY (A-2) H3C CH3

and 5 to 85 % of the groups of the formula (A-1-a) and/or (A-1-b), V {INC -C a ky (A-1-b) H3C CH3

relative to the total sum of the groups (A-1-a), (A-1-b) and (A-2);

g) - CH2-C I _ (IX) O I o R23 0 1 0 R27 121 126

H3C <CH3 R2s H3C I CH3

RZ in which R2, and R26 independently of one another are a direct bond or a group -N(Yi)-CO-Y2-CO-N(Y3)-t Y. and Y3 independently of one another are hydrogen, C'-C8alkyl, C5-C,2cycloalkyl, phenyl, C7-Cgphenylalkyl or a group of the formula (IV), Y2 is a direct bond or C1-C4alkylene, the radicals R22 independently of one another are hydrogen, C -C8alkyl or C,C20acyl, R23, R24, R27 and R23 independently of one another are hydrogen, C -C30alkyi, C5-C 2cycloalkyl or phenyl, R2s is hydrogen, C,-C30alkyl, CsC 2cycloalkyl, phenyl, C7-Cgphenylalkyl or a group of the formula (IV) with 5 to 85 % of the total sum of the radicals R o and R22 independently of one another being hydrogen or C,-C8alkyl and the remaining radicals R, o and R22 being C,-C20acyl, and nS is a number from 2 to 50; h) a product mixture of the formula

- 8 o H CH3 C OLIN-R30

CH _ C H3C CH3 (X)

R29 \ He CH3 C-O N-R30

l 1 \7( H3C CH3

in which R29 is hydrogen, C,-C,2alkyl or C,-C,2alkoxy, and the radicals R30 independently of one another are hydrogen, C,-C3alkyl or C'-C20acyl with 5 to 85 % of the total sum of the radicals R30 independently of one another being hydrogen or C -C8alkyl and the remaining radicals R30 being C,-C20acyl; _ _ f H CH2-O-

i) \ C H ( X I) H3C ACHE

_R31 _ n in which the radicals R3, independently of one another are hydrogen, C,-C3alkyl or C,-C20acyl with 5 to 85 % of the radicals R3, independently of one another being hydrogen or C,-C8alkyl and the remaining radicals R3, being C -C20acyl, and n6 is a nunnber from 2 to 50,

- 9 - j) a product mixture of the formula H3C 3 1 33 1 3s 0 R33 H <CH3 R. -N IN C C No N-R3z (Xll) >I 1 /\

H3C CH3 R34 H3C CH3

in which the radicals R32 independently of one another are hydrogen, C C8alkyl or C -CzOacyl with 5 to 85 % of the total sum of the radicals R32 independently of one another being hydrogen or C'-C alkyl and the remaining radicals R32 being C,-C20acyi, the radicals R33 independently of one another are hydrogen, C,-C 2alkyl or C,-C,zacyl, and R34 and R3s independently of one another are C -C,2alkyl; k) --C-Rae fH R37 fH Rue C 0 R3 X R40 0-_ 3 - J'<CHa,, <CH, R41 n 7 (X111)

in which R36, R37, R33, R39 and R40 independently of one another are a direct bond or C,-C,Oalkylene, the radicals R4, independently of one another are hydrogen, C,-COalkyl or C,-CzOacyl with 5 to 85 % of the radicals R4, independently of one another being hydrogen or C,-C'3alkyl and the remaining radicals R4, being C,-C20acyl, and n, is a number from 1 to 50; 1) a product mixture of the formula

- 10 o \ N N / (X I V)

0 \ N / \O

X13 in which X 2, X'3 and X'4 independently of one another are a group of the formula (XV), CH2-I H CH2 A (XV)

OH in which A is a group of the formula (111) with 5 to 85 % of the total sum of the radicals Rg and Rio independently of one another being hydrogen or C -Caalkyl and the remaining radicals Rg and Rio being C - C20acyl; m) a product mixture of the formula H3C CH3 1 43 R43' H CH3

R42 - N>,, N-R43-N 7 R42 (XVI)

H3C CH3 H3C CH3

in which the radicals R42 independently of one another are hydrogen, C,C8alkyl or C,-C20acyl with 5 to 85 % of the total sum of the radicals R42 independently of one another being hydrogen or C -C8alkyl and the remaining radicals R42 being C,-C20acyl, the radicals R43 independently of one another are C,-C20acyl, (C,-C8alkoxy)carbonyl, (Cs-C,2cycloalkoxy) carbonyl, (C, -C8alkyl)am inocarbonyl, (Cs-C 2cycloalkyl)aminocarbonyl, (C7-Cgphenylalkyl)aminocarbonyl, C'-C3alkyl, Cs-C,2cycloalkyl which is unsubstituted or substituted by 1, 2 or 3 C,-C4alkyl; C3-C6alkenyl, C7C9phenylalkyl which is unsubstituted or substituted on the phenyl by 1, 2 or 3 C,-C4alkyl; or -CH2CN, and R43 is C2-C22alkylene, Cs-C7cycloalkylene, C,-C4alkylenedi(Cs-C7cycloalkylene), phenylene or phenylenedi(C,C4alkylene); n) a product mixture of the formula

H3C: 43 Ol H CH3 R44 Nit N-R46 C I & (XVII) H3C CH3 4s H3C CH3 in which the radicals R44 independently of one another are hydrogen, C,-C8alkyl or C,-C20acyl with 5 to 85 % of the total sum of the radicals R44 independently of one another being hydrogen or C -CRalkyl and the remaining radicals R44 being C,-C20acyl, the radicals R4s independently of one another are hydrogen, C,-C,2alkyl or C,-C,2acyl,and R46 is C,-C, Oalkylene; a) a product mixture of the formula HI CH3

H3C CH3 N N N N-R47

>em H3C CH3 (XVl11) R47 N: N:,N

H3C CH3

in which the radicals R47 independently of one another are hydrogen, C,C8alkyl or C,-C20acyl with 5 to 85 % of the total sum of the radicals R47 independently of one another being hydrogen or C -C8alkyl and the remaining radicals R47 being C,-C20acyl; or

- 12 R49 R49 -

P) --R48 C Rs, C (XIX) f f Rso Rs2 n in which R48 and R5, independently of one another are C -C,Oalkylene, the radicals R49 independently of one another are hydrogen or C,-C,Oalkyl, R50 is C -C Oalkyl, R52 is C,-C, Oalkyl or a group of the formula (IV), and n8 is a number from 3 to 50, with the proviso that at least 50 % of the radicals Rs2 are a group of the formula (IV) with 5 to 85 % of the radicals Rio independently of one another being hydrogen or C -C8alkyl and the remaining radicals R'o being C'-C20acyl.

Examples of alkyl having up to 30 carbon atoms are methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, 2-ethylbutyl, npentyl, isopentyl, 1-methylpentyl, 1,3-dimethyl-

butyl, n-hexyl, 1-methylhexyi, n-heptyl, isoheptyl, 1,1,3,3tetramethylbutyl, 1-methylheptyl, 3-

methylheptyl, n-octyl, 2-ethylhexyi, 1,1,3-trimethylhexyl, 1,1,3,3tetramethylpentyl, nonyl, decyl, undecyl, 1-methylundecyl, dodecyl, 1,1,3, 3,5,5-hexamethylhexyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, eicosyl, docosyl and triacontyl. One of the preferred meanings of R23 and R27 is C'-C25alkyl, especially C s-c2salkyl, for example hexadecyl and C 8-C22alkyl. One of the preferred meanings of R2s is C,-C2salkyl, especially octadecyl. One of the preferred meanings of R8 and R,g is C -C4alkyl, especially n-butyl. Examples of C'-C4alkoxy are methoxy, ethoxy, propoxy and butoxy.

Examples of C3-C6alkenyl are allyl, 2-methallyl, butenyl, pentenyl and hexenyl. Allyl is

- 13 preferred. The carbon atom in position 1 is preferably saturated.

Examples of Cs-C 2cycloalkyl are cyclopentyl, cyclohexyl, cycioheptyl, cyclooctyi and cyclododecyl. Cs-C8cycloalkyl, especially cyclohexyl, is preferred.

C'-C4alkyl-substituted Cs-C,2cycloalkyl is for example methylcyclohexyl or dimethylcyclohexyl. -OH- and/or C'-C,Oalkyl-substituted phenyl is for example methylphenyl, dimethylphenyl, trimethylphenyl, tert-butyiphenyl or 3,5-di-tert-butyl-4-hydroxyphenyl.

Examples of C7-C9phenylalkyl are benzyl and phenylethyl.

C7-Cgphenylalkyl which is substituted on the phenyl radical by -OH and/or by alkyl having up to 10 carbon atoms is, for example, methylbenzyl, dimethylbenzyl, trimethylbenzyl, tert-

butylbenzyl or 3,5-di-tert-butyl-4-hydroxybenzyl.

C'-C20acyl (e.g. C2-C20acyl) is preferably C,-C20alkanoyl or C2C20alkanoyl, C3-C20alkenoyl or benzoyl. Examples are formyl, acetyl, propionyl, butyryl, pentanoyl, hexanoyl, octanoyl, benzoyl, acryloyl and crotonoyl. C'-C,Oacyl (e.g. C2-C,0acyl), in particular C -C8acyl or C2C8acyl such as C,-C8alkanoyl or C2-C alkanoyl, C3-Caalkenoyl or benzoyl, especially acetyl, is preferred.

Examples of (C,-C8alkoxy)carbonyl are methoxycarbonyl, ethoxycarbonyl, propoxycarbonyl, butoxycarbonyl, pentoxycarbonyl, hexoxycarbonyl, heptoxycarbonyl and octoxycarbonyl. One of the preferred meanings of A is (C -Czalkoxy)carbonyl.

A particularly preferred example of (Cs-C,2cycloalkoxy)carbonyl is cyclohexoxycarbonyl.

Examples of (C,-C8alkyl)aminocarbonyl are methylaminocarbonyl, ethylaminocarbonyl, propylaminocarbonyl, butylaminocarbonyl, pentylaminocarbonyl, hexylaminocarbonyl, heptylaminocarbonyl and octylaminocarbonyl. (C'-C4alkyi)aminocarbonyl is preferred.

- 14 A particularly preferred example of (Cs-C,2cycloalkyi)aminocarbonyl is cyclohexylaminocarbonyl. A particularly preferred example of (C7Cgphenylalkyl)aminocarbonyl is benzyiaminocarbonyl.

Examples of alkylene having up to 22 carbon atoms are methyiene, ethylene, propylene, trimethylene, tetramethylene, pentamethylene, 2,2-di m ethyltrim ethyl ene, hexam ethyl en e, trimethylhexamethylene, octamethylene and decamethylene. R,2 is preferably hexamethylene, R36 and R38 are preferably methylene, R3s is preferably 2,2-dimethylethylene and R40 1,1-dimethylethyiene.

An example of C4-C,Oalkanetetrayl is 1,2,3,4-butanetetrayl.

An example of bis{(C,-C20alkyl)oxycarbonyl}C4-C,Oalkanetetrayl is bis tridecyloxycarbonyl}butanetetrayl.

An example of Cs-C7cycloalkylene is cyclohexyiene.

An example of C,-C4alkylenedi(Cs-C7-cycloalkylene) is methylenedicyclohexylene.

An example of phenylenedi(C,-C4alkylene) is phenylenedimethylene.

Where the radicals R.,, R,2 and R,3, together with the nitrogen atoms to which they are attached, form a 5- to 1 O-membered heterocyclic ring, the resulting ring is for example ICH3,/\,

/ \ MACH / \

N N, N N or Ned N-.

A 6-membered heterocyclic ring is preferred.

Where the radicals R,4 and Rig, together with the nitrogen atom to which they are attached, form a 5- to 10-membered heterocyclic ring, the resulting ring is for example 1-pyrrolidyl, piperidino, morpholino; 1piperazinyl, 4-methyl-1-piperazinyl, 1-hexahydroazepinyl, 5,5,7-

trimethyl-1 -homopiperazinyl or 4,5,5,7-tetramethyl- 1 -homopiperazinyl. Morpholino is

- 15 particularly preferred.

One of the preferred meanings of R23 and R27 is phenyl.

Y2 and Ray are preferably a direct bond.

One of the preferred meanings of Y. and Y3 is hydrogen.

H:7CH3 V

A preferred meaning of the group IN-c'-cealky! is {7:N-C,-C4alkyl in H3C CH3 H3C CH3

particular IN-CH3 H3C CH3

n2 is preferably 2-25.

n3 is preferably 2-25, especially 2-20 or 2-10.

no,', n4" and n4"' are preferably 2-4.

no is preferably 2-25, especially 2-20 or 2-10.

n6 is preferably 2-25, especially 2-20 or 2-10.

n7 is preferably 1-25, especially 1-20 or 1-10.

n6 is preferably 3 25, especially 3-20.

A product which is of interest is one wherein n'is2Or4, if n, is 2, R2 is C2-C'0alkylene or bis{C'-C,salkyl}oxycarbonyi, and if no is 4, R2 is 1,2, 3,4-butanetetrayl; R3 and R7 independently of one another are hydrogen, C -C4alkyl or C,-C2Gacyi, R4, R5 and R6 independently of one another are C2C6alkylene, and

- 16 R8 is hydrogen, C1-C6alkyl, Cs-C8cycloalkyl, methyl-substituted Csc8cycloalkyl' phenyl, C7-Cgphenylalkyl or a group of the formula (IV); R., , R,3, R,4 and R,5 independently of one another are hydrogen, C,-C8alkyl, C5-Cacycloalkyl, methyl-substituted C5-C8cycloalkyl, phenyl, Crc9phenylalkyl or a group of the formula (IV), or the radicals R,4 and Rest together with the nitrogen atom to which they are attached, form a 6membered heterocyclic ring, R,2 is C2-C,Oalkylene, and n2 is a number from 2 to 25; R,6 is C,-C4alkyl, C5-C8cycloalkyl or phenyl, R,7 is C3C6alkylene, and n3 is a number from 2 to 25; n'4, n"4 and n"'4 independently of one another are an integer from 2 to 4, and R. g is C, C4alkyl; R2, and R26 independently of one another are a direct bond or a group -N(Y,)-CO-Y2-CO-N(Y3)-,

Y. and Y3 independently of one another are hydrogen or C'-C4alkyl, Y2 is a direct bond, R23 and R27 are C,-C2salkyl or phenyl, R24 and R2a are hydrogen or C,-C4alkyl, R2s is C1-C2salkyl or a group of the formula (IV), and nS is a number from 2 to 25; R29 is hydrogen, C -C4alkyl or C'C4alkoxy; n6 is a number from 2 to 25; the radicals R33 independently of one another are hydrogen or C1-C4alkyl, and the radicals R34 and R35 independently of one another are C,-C4alkyl;

- 17 R3c, Rae, R39 and R40 independently of one another are C'-C4alkylene, R37is a direct bond, and n7 is a number from 1 to 25; R43is C2C6alkylene, cyclohexylene or phenylene; the radicals R4s independently of one another are hydrogen or C'-C4alkyl, and R46 is C2-C6alkylene; and R4 3 and Rs independently of one another are C,-C5alkylene, the radicals R49 independently of one another are hydrogen or C'-C4alkyl, Rsois C,-C4alkyl, Rs2 is C,-C4alkyl or a group of the formula tlV), and n8 is a number from 3 to 25.

A product which relates to a preferred embodiment is one corresponding a) to a product mixture of the formula H3C O-C (CH2)e C O CH3 (1-a) H3C CH3 H3C CH3

wherein 5 to 85 % of the total sum of the radicals R. are hydrogen or methyl and the remaining radicals R. are CF-C'Oacyl; to a product mixture of the formula f fH CH fH2 (I-b) IC=0 i=0 Cl=0:=0 o 0 1 O H3C CH3 H3C CH3 H3C CH3 H3C CH3

H3C I CH3 H3C I CH3 H3C I CH3 H3C I CH3

R R. R. R.

wherein 5 to 85 % of the total sum of the radicals R' are hydrogen or methyl and

- 18 the remaining radicals R, are C,-C10acyl; or to a product mixture of the formula H2 Ic fH fH fH2 (1-c) I =0 1C=0 IC=0 1C=0

I f f R. Rat R. R* wherein two of the radicals R* are -COO-C'3H27, and V two of the radicals Ret are a group IN-R. with 5 to 85 % of the total H3C CH3

sum of the radicals Rat being hydrogen or methyl and the remaining radicals R. being C,-C Oacyl; b) to a product mixture of the formula (Ila) H C N ' IN-(CHz) N CH2CH2 (il-a) H3C CH3 C H New H NON N-C Hg IN C4H9 H3C IN CH3 H3C> <CH3 H3C <CH3

Rg H3C IN CH3 H3C IN CH3 R' Rg 2 wherein 5 to 85 % of the total sum of the radicals Rg are hydrogen or methyl and the remaining radicals Rg are C,-C,Oacyl; c) to a product mixture of the formula (V-a)

- 19 H C CH

R N // NI -Rg (V-a) H3C CH3 C4Hg N N C4H9 H C CH3 N C4Hg H. C' Rg wherein 5 to 85 % of the total sum of the radicals Rg are hydrogen or methyl and the remaining radicals R9 are C'-C,Oacyl; d) to the formula (Vl-a), (Vl-b) , (Vl-c), (Vl-d) or (Vl-e) _ N (CH2)6 N N -_ (Vl-a) H3C CH3 H3C 3 H

H3C ' <CH3 H3C CH3 N C4 g R,o H3C CH3 H3C IN CH3

_ R o n 2 _ N (CH2)6 N \ l _ (Vl-b) H3C <CH3 H3C>[ CH3 CH3 CH3

H. C Nl CH3 H3C IN CH3 N I-CH-C-CH L R o Rlo H CH3 CH3 n 2

- 20 _ N (CH2)6 N N (Vl-C) H3C <CH3 H3C CH3 \

H3C IN CH3 H3C IN CH3 N:

_ R10 R1o O _ n 2 _ N (CH2)6 N (Vl-d) H3C> <CH3 H3C <CH3 \:

H3C IN CH3 H3C IN CH3 N-H

Rlo R10 [ n_ I;! _ N (CH2)6 N N (Vl-e) H3C <CH3 H3C <CH3 \j H3C IN CH3 H3C Nl CH3 N-H R10 10 H3C-1C-CH3 r wherein 5 to 85 % of the radicals R,o independently of one another are hydrogen or methyl and the remaining radicals Rlo are C,-C,Oacyl; e) to the formula (Vll-a)

- 21 - Si-0 (Vll-a) ( I H2)3

H3C CH3

H3C IN CH3

R.8 wherein 5 to 85 % of the radicals Rye independently of one another are hydrogen or methyl and the remaining radicals Rue are C -C,Oacyl; f) to a product obtainable by reacting a compound, obtained by reaction between a polyamide of the formula (Vlila-1) and cyanuric chloride, with a compound of the formula (Vlilb-1) or a mixture of the compounds (Vlilb- 1) and (Vlilb*-1) to give an intermediate.

H2N (CH2)3 NH (CHz)2 NH (CH2)3 NH2 (Vlila-1) H-N C4Hg (villb-1)' H-N C4Hg (Vlilb*-1) H3C CH3 H3C CH3

H3C IN CH3 H3C Nl CH3 H CH3 with the proviso that in the mixture of the compounds (Vlilb-1) and (Vlilb*-1) at least 15 % of the compound (Vlilb-1) is present; and subsequent acylation of the groups of the formula (A-1-a) being present in the intermediate H3C CH3

AN-H (A-1-a) H3C CH3

- 22 in a proportion to give a product which contains 15 to 95 % of the groups of the formula (A-2-1) H CH3 7<N-Cl-C Oacyl (A-2-1) H3C CH3

and 5 to 85 % of the groups of the formula (A-1-a) and / or (A-1-b-1), <CH3 N-CH3 (A-1-b-1) H3C CH3

relative to the total sum of the groups (A-1-a), (A-1-b-1) and (A-2-1); 9) to the formula (IX-a), (IX-b) or (IX-c) _ IH IH -

0 N o CH2 1 _ (IX-a) I H2)17 2l I H ' " f ''< CH3 CH3 H3C IN CH3 H3C I CH3

_ R22 R10 _ n: ICH3 ICH3

u: CHz- (IX-b) R22 _ n

- 23 i: CHz Cat CH2 Cat; (IX-c) C O C=0

C <CH3 H3C>)<CH3

R22 R,O n5 wherein 5 to 85 % of the radicals R,o and R22 independently of one another are hydrogen or methyl and the remaining radicals R,o and R22 are C,-C,Oacyl; h) to a product mixture of the formula (X-a) H3C CH3

1 1, C O N-R30

H CO / / CH =C H3C CHIN (X-a) C-OWN-R30

H3C CH3

wherein 5 to 85 % of the total sum of the radicals R30 are hydrogen or methyl and the remaining radicals R30 are C,-C,Oacyl; i) to the formula (Xi) wherein 5 to 85 % of the radicals R3, independently of one another are hydrogen or methyl and the remaining radicals Rat are C'-C Oacyl; I) to a product mixture of the formula (Xll-a)

- 24 H3C CH3 H CH3 O H H CH3

R - N; N C C N N-R32 (Xll-a) H3C CH3 CH3 H3C CH3

wherein S to 85 % of the total sum of the radicals R32 are hydrogen or methyl and the remaining radicals R32 are C -C Oacyl; k) to the formula (Xlil-a) 1 1 1 1 I H3 0 0 fH3 _ C CHz fH fH-CH2 C-O-CH2-IC ( X C-CH2-O-_ H3C CH3 H3c>( CH3 H3C I CH3 H3C CH3

R4. 4, - _ n 7 (X111-a) wherein 5 to 85 % of the radicals R4 independently of one another are hydrogen or methyl and the remaining radicals R4 are C,-C,Oacyl; 1) to a product mixture of the formula (XlV-a) > \ O Rg _>NH-CH2-CH- \, C / 2 (XlV-a) OH H3C CH3_ C N'

fH2 wherein 5 to 85 % of the total sum of the radicals Rg are hydrogen or methyl and the remaining radicals Rg are C,-C,Oacyl;

- 25 m) to a product mixture of the formula (XVI-a) H3C CH3 IR43* R43* H CH3

R - NO N (CH2)6 N DON-R42 (XVI-a) >W A H3C CH3 H3C CH3

wherein 5 to 85 % of the total sum of the radicals R42 are hydrogen or methyl and the remaining radicals R42 are C,-C'Oacyi; and the radicals R43* are C,-C10acyl; n) to a product mixture of the formula (XVII-a) H3C CH3 1 I H::CH3

R44 Nit N-CH2CH2-C-N R44 (XVII-a) H3C CH3 H3C CH3

wherein 5 to 85 % of the total sum of the radicals R44 are hydrogen or methyl and the remaining radicals R44 are C,-C,Oacyl; a) to a product mixture of the formula (XV111) wherein 5 to 85 % of the total sum of the radicals R47 are hydrogen or methyl and the remaining radicals R47 are C,C,Oacyl; or p) to the formula (XlX-a) l (XlX-a) __CH2 f CH2 fH :_o l=0 L f f CH3 Rs2 n wherein the radicals Rs2 independently of one another are ethyl or a group of the formula (IV),

- 26 with the provisos that (1) at least 50 % of the radicals R5z are a group of the formula (IV) with Rio being hydrogen, methyl or C,-C Oacyl, and the remaining radicals Rs2 are ethyl and (2) 5 to 85 % of the radicals R,o independently of one another are hydrogen or methyl and the remaining radicals Rio are C -C,Oacyl.

A product which relates to a further preferred embodiment is one corresponding a) to a product mixture of the formula (I-a) wherein 20 to 70 % of the total sum of the radicals R' are hydrogen or methyl and the remaining radicals Rat are C'-C,Oacyl; to a product mixture of the formula (I-b) wherein 20 to 70 % of the total sum of the radicals Rat are hydrogen or methyl and the remaining radicals Rat are C -C'Oacyl; or to a product mixture of the formula (I-c) wherein 20 to 70 % of the total sum of the radicals Rat are hydrogen or methyl and the remaining radicals Rat are C -C,Oacyl; b) to a product mixture of the formula (Il-a) wherein 20 to 70 % of the total sum of the radicals Rg are hydrogen or methyl and the remaining radicals Rg are C'-C,Oacyl; c) to a product mixture of the formula (V-a) wherein 20 to 70 % of the total sum of the radicals Rg are hydrogen or methyl and the remaining radicals Rig are C,-C'Oacyi; d) to the formula (Vl-a), (Vl-b), (Vl-c), (Vl-d) or (Vl-e) wherein 20 to 70 % of the radicals Rio independently of one another are hydrogen or methyl and the remaining radicals Rio are C,-C Oacyl; e) to the formula (Vll-a) wherein 20 to 70 % of the radicals R'8 independently of one another are hydrogen or methyl and the remaining radicals Rota are C -C Oacyl; f) to a product obtainable by reacting a compound, obtained by reaction between a

- 27 polyamine of the formula (Vlila-1) and cyanuric chloride, with a compound of the formula (Vlilb-1) or a mixture of the compounds (Vlilb-1) and (Vlilb -1) to give an intermediate with the proviso that in the mixture of the compounds (Vlilb-1) and (Vlilb*-1) at least 30 % of the compound (Vlilb-1) is present; and subsequent acylation of the groups of the formula (A-1-a) being present in the intermediate in a proportion to give a product which contains 30 to 80 % of the groups of the formula (A2-1) and 20 to 70 % of the groups of the formula (A-1-a) and / or (A-1-b1), relative to the total sum of the groups (A-1-a), (A-1-b-1) and (A-2-1) ; g) to the formula (IX-a), (IX-b) or (IX-c) wherein 20 to 70 % of the radicals Rio and R22 independently of one another are hydrogen or methyl and the remaining radicals R,o and R22 are C,-C,Oacyl; h) to a product mixture of the formula (X-a) wherein 20 to 70 % of the total sum of the radicals R30 are hydrogen or methyl and the remaining radicals R30 are C,C,Oacyl; i) to the formula (Xl) wherein 20 to 70 % of the radicals R3' independently of one another are hydrogen or methyl and the remaining radicals R34 are C'-C'Oacyl; j) to a product mixture of the formula (Xlla) wherein 20 to 70 % of the total sum of the radicals R32 are hydrogen or methyl and the remaining radicals R32 are C,-C,Oacyl; k) to the formula (Xl11-a) wherein 20 to 70 % of the radicals R4, independently of one another are hydrogen or methyl and the remaining radicals R4' are C,C,Oacyl; I) to a product mixture of the formula (XlV-a) wherein 20 to 70 % of the total sum of the radicals Rg are hydrogen or methyl and the remaining radicals Rg are C,-C,Oacyi;

- 28 m) to a product mixture of the formula (XVI-a) wherein 20 to 70 % ofthe total sum of the radicals R4a are hydrogen or methyl and the remaining radicals R42 are C,-C,Oacyl; n) to a product mixture of the formula (XVII-a) wherein 20 to 70 % of the total sum of the radicals R44 are hydrogen or methyl and the remaining radicals R44 are C,-C Oacyl; o) to a product mixture of the formula (XV111) wherein 20 to 70 % of the total sum of the radicals R47 are hydrogen or methyl and the remaining radicals Rat are C'-C,Oacyl; or p) to the formula (XlX-a) wherein 20 to 70 % of the radicals Rio independently of one another are hydrogen or methyl and the remaining radicals Rio are C,-C,Oacyl.

A product which relates to a particular preferred embodiment is one corresponding a) to a product mixture of the formula (I-a) wherein 15 to 30 % of the total sum of the radicals R. are hydrogen or methyl and the remaining radicals R. are C,-C,Oacyl; b) to a product mixture of the formula (Il-a) wherein 30 to 50 % of the total sum of the radicals Rg are hydrogen or methyl and the remaining radicals Rg are C,-C,Oacyl; d) to the formula (Vl-a) wherein 15 to 85 % of the radicals R'o independently of one another are hydrogen or methyl and the remaining radicals Rio are C -C Oacyl; or to the formula (Vl-b) or (Vl-c) wherein 15 to 60 % of the radicals Rio independently of one another are hydrogen or methyl and the remaining radicals Rio are C -C,Oacyt; e) to the formula (Vll-a) wherein 15 to 35 % of the radicals Rue independently of one another are hydrogen or methyl

- 29 and the remaining radicals Rue are C,-C,Oacyl; f) to a product obtainable by reacting a compound, obtained by reaction between a polyamine of the formula (Vlila-1) and cyanuric chloride, with a compound of the formula (Vlilb-1) or a mixture of the compounds (Vlilb-1) and (Vlilb*-1) to give an intermediate with the proviso that in the mixture of the compounds (Vlilb-1) and (Vlilb*-1) at least 50 % of the compound (Vlilb-1) is present; and subsequent acylation of the groups of the formula (A-1-a) being present in the intermediate in a proportion to give a product which contains 50 to 70 % of the groups of the formula (A-2-1) and 30 to 50 % of the groups of the formula (A-1-a) and I or (A-1-b-1), relative to the total sum of the groups (A-1-a), (A-1-b-1) and (A-2-1); k) to the formula (Xl11-a) wherein 15 to 30 % of the radicals R4, independently of one another are hydrogen or methyl and the remaining radicals R4, are C,-C,Oacyl; or m) to a product mixture of the formula (XVI-a) wherein 30 to 50 % of the total sum of the radicals R42 are hydrogen or methyl and the remaining radicals R42 are C,-C'Oacyl.

A product wherein the meaning C,-C,Oacyl is acetyi is especially preferred.

A product which corresponds to the formula (Vl-a) wherein 40 to 60 %, e.g. 25 to 50 %, of the radicals Rio independently of one another are hydrogen or methyl is also preferred.

A product which corresponds to the formula (Vl-a) wherein 40 to 60 %, e.g. 25 to 50 %, of the radicals R,o are hydrogen and the remaining radicals R,o are acetyl is particularly preferred.

- 30 The products described under a) to p) above can be prepared, for example, by the method indicated below under "Example of a preparation process", using the corresponding 2,2,6,6-

tetramethylpiperidine derivatives (unsubstituted nitrogen in the 2,2,6,6tetramethyl-4-piperidyl groups) as starting compounds. The 2,2,6,6tetramethylpiperidine derivatives are essentially known (some are commercially available) and can be prepared by known methods, for example as described in US-A-3,640,928, US-A-4,108,829, US-A-3,925,376, US-A-

4,086,204, EP-A-732,994, EP-A-850,938, US-A-4,331,586, US-A-5,051,458,

US-A-4,477,615 and Chemical Abstracts - CAS No. 136504-g6-6, US-A-4,857, 595, DD-A-262,439 (Derwent 89-122983/17, Chemical Abstracts 111:58964u), WO-A-94/12,544 (Derwent 94-177274/22), GB-A-2,269,819, US-A-4,340,534, EPA-172,413, US-A-4,529,760, US-A-5,182,390 (Chemical Abstracts - CAS No. 144923-25-1), US-A-4,976,889, SU-A-768,175 (Derwent 88-138,751/20), US-A4,769,457 and DE-A-2,748,362 (Derwent 3551 7B/1 9).

The 2,2,6,6-tetramethylpiperidine derivative intermediate belonging to item f) above can be prepared in analogy to known methods, for example by reacting a polyamide of the formula (Vlila) with cyanuric chloride in a molar ratio of from 1:2 to 1:4 in the presence of anhydrous lithium carbonate, sodium carbonate or potassium carbonate in an organic solvent such as 1,2-dichloroethane, toiuene, xylene, benzene, dioxane or tertamyl alcohol at a temperature of from -20 C to +10 C, preferably from -1 0 C to +10 C, in particular from 0 C to +10 C, for from 2 to 8 hours and then reacting the resulting product with a 2,2,6,6-tetramethyl-4-

piperidylamine of the formula (Villb). The molar ratio of 2,2,6,6tetramethyl-4-piperidylamine to the polyamide of the formula (Villa) which is employed is, for example, from 4:1 to 8:1.

The quantity of 2,2,6,6-tetramethyl-4-piperidylamine can be added in one go or in two or more portions at an interval of a few hours.

The ratio of polyamine of the formula (Vlila) to cyanuric chloride to 2,2, 6,6-tetramethyl-4-

piperidyiamine of the formula (Vlilb) is preferably from 1:3:5 to 1:3:6.

The following example indicates a possible method of preparing the preferred 2,2,6,6-

tetramethylpiperidine derivative intermediate which belongs to item f) above.

Example 23.6 g (0.128 mol) of cyanuric chloride, 7.43 9 (0.0426 mol) of N, N'-bis[3-

aminopropyl]ethylenediamine and 18 g (0.13 mol) of anhydrous potassium carbonate are

-31 reacted in 250 ml of 1,2-dichloroethane at 5 C for 3 hours with stirring. The mixture is heated at room temperature for a further 4 hours. 27.2 g (0.128 mod) of N-(2 2 6 6-tetramethyl-4 piperidyl)butylamine are added and the mixture obtained is heated at 60 C for 2 hours. A further 18 g (0.13 mol) of anKydrous potassium carbonate are added and the mixture is heated at 60 C for a further 6 hours. The solvent is distilled off under a slight vacuum (200 mbar) and replaced by xylene. 18.2 g (0. 085 mol) of N-(2,2,6,6-tetramethyl-4-

piperidyl)butylamine and 5.2 g (0.13 mol) of ground sodium hydroxide are added and the reaction mixture is heated at reflux for 2 hours, and for a further 12 hours, the water produced in the reaction is removed by azeotropic distillation. The mixture is filtered. The solution is washed with water and dried over Na2SO4. The solvent is evaporated off and the residue is dried in vacuo (0.1 mbar) at 120-130 C. The desired product is obtained as a colourless resin.:: In general, a 2,2,6,6tetramethylpiperidine derivative intermediate belonging to item f) above can be represented, for example, by a compound of the formula (Vlil-1), (V111-2) or (V111-3). It can also be present as a mixture of these three compounds.

HN (CH2)2-42 l (CH2)2 42 2 2- 2 -

N N N N NlN tg R19 /<N \ / '9 -N N H3C am< CH3 H3C am< CH3 H3C ó < CH3 H3C am< CH3 H3C > CH3 H3C IN CH3 H3C IN CH3 H3C IN CH3 H3C IN CH3 H3C IN CH3

_ H H H H _ n4 (V111-1)

- 32 HN (CH2) N

N 1 N 2-121

N -N-R19 ( I 2)2-12

H3C, CCHH3 N l H H N N (CH2) 2-12 N N

R'g_N/<N'-N R,g 'N N' N R19 H3C >[ CH3 H3C CH3 H3C > CH3 H3C CH3

H3C Nt CH3 H3C IN CH3 H3C IN CH3 H3C IN CH3 H H H H

n4 (V1 1 1-2)

_ N (CH2) 2-12 1 _

N (CH2)2 12 (CH2)2 12

N -N-R,g NH NH 3 C Rl9 NlN R. R. NlN H3C h<CH3 H3C, 1< CH3 H3C >[ < CH3 H3C > < CH3 H3C tN CH3 H3C IN CH3 H3C iN CH3 H3C IN CH3 H H H H n4 (V1113)

A preferred meaning of the formula (V111-1) is HN (CH2) N (CH2) N (CH2)NH - _

1 3 1 2 1 3

N N N N NiN / '< 11 n-HgC4\ N'\ n-HgC4\ N)\ iC4Hg-n N O4H9-n N N C4Hg-n N N H3C> <CH3 H3C > <CH3 H3C> <CH3 H3C> <CH3 H3C;h<CH3 H3C Nl CH3 H3C IN CH3 H3C IN CH3 H3C Nl CH3 H3C IN CH3 H H H H H

n4 A preferred meaning of the formula (V111-2) is

- 33 HN (C H2) N _

N 1 N 3 l g-N N C4Hs n (CH2)2 N C H N 1 N (CH2) N 1 N C H -n H,, 4 9

n HsC4 N N - C4Hg-n N N N H3C CH3 H3C CH3 H3C CH3 H3C CH3

H3C Nl CH3 H3C Nl CH3 H3C Nl CH3 H3C IN CH3 _ H H H n4 A preferred meaning of the formula (V111-3) is N (CH2) N _

N (CHz)3 (CIHz)3 / 't N N - C4H9 n NH NH H3C CH3 N l N n-H,C N l N H3C I CH3 9 4N - C4Hg-n \ N N / C4H9-n H3C CH3 H3C CH3 H3C CH3 H3C CH3

H3C;IN CH3 H3C Nl CH3 H3C I CH3 H3C I CH3 H -H H H n4 In the above formulae (V111-1) to (V111-3), n4 is preferably 1 to 20, e.g. 2 to 20.

Preferred commercially available starting materials for the preparation of the compounds shown above under items a) to b), d) to g), i) to k) and m) to p) are TINUVIN 770, MARKLA 57, MARK LA 67, CHIMASSORB 905, CHIMASSORB 2020,

CHIMASSORB944, CYASORB UV3346, DASTIB 1082, UVASIL299, UVASORBHA

88, UVINUL 5050 H. LICHTSCHUTZSTOFF UV 31, LUCHEM HA-B 18, HOSTAVIN N

30, SUMISORBTM 61, MARKLA 68, UVINUL4050 H. DIACETAM 5, UVINUL 4049

and FERRO AM 806.

Particularly preferred starting materials are the products disclosed in EP-A-850,938, especially the products disclosed therein in EXAMPLES 1 to 7, in particular EXAMPLE 1.

EP-A-850,938 which is equivalent to US Patent Application No. 08/994,977 filed on

- 34 December 19, 1997 is incorporated herein by reference.

Further particularly preferred starting materials are the products disclosed in EP-A-782,994, especially the products disclosed therein in EXAMPLES 1 to 12, in particular EXAMPLE 10.

EP-A-782,994 which is equivalent to US Patent Application No. 081756,225 filed on November 25, 1996 is also incorporated herein by reference.

In more detail, those products essentially known from EP-A-850,938, which correspond to the following formula (Vl*) may be displayed as starting materials.

A-N-Rt2-N N R12 N -A (Vl) H3C CHs ' H3C CHa H3C N CH3 N-R's H3C I CH3 H _ R,4 H n2 in which n2 is a number from 2 to 14, in particular a number from 2 to 6, the radicals Rig, R,2, R,4 and R,5 independently of one another are as defined above, and the radicals A independently of one another are C'-C20acyl, (C,-C8alkoxy)carbonyl, (C5-C 2cycloalkoxy) carbonyl, (C -C alkyl)aminocarbonyl, (Cs-C,2cycloalkyl)aminocarbonyl, (C Cgphenylalkyl)aminocarbonyl, C,-C8alkyl, C5-C 2cycloalkyl which is unsubstituted or substituted by 1, 2 or 3 C,-C4alkyl; C3-C6alkenyl, C7Cgphenylalkyl which is unsubstituted or substituted on the phenyl by 1, 2 or 3 C -C4alkyl; or -CH2CN; in particular C,-C20acyl, especially C'Caacyl.

Various examples of the above chemical meanings are listed further above.

Particularly preferred are those products of the formula (Vl*) which have a narrow, well defined molecular weight distribution.

The polydispersity indicates the molecular-weight distribution of a polymeric compound. In the present application, the polydispersity is the ratio of weight-average (Mw) and number-

average (Mn) molecular weights. A value of Mw/Mn equal to 1 means that the compound is monodispers and has only one molecular weight and no molecular weight distribution. A narrow molecular weight distribution is characterized by a polydispersity close to 1.

- 35 Further, those products essentially known from EP-A-782,994, which correspond to the following formula (Vl**) may be displayed as starting materials.

it's'-Nit IN R,2-N pun NR.-N N:N-R. ' I, N.;, N l l N. N | /: N;, N I R14 R., H3 1 R., H3C J, CH3 1 À4

-R,s' H3C >: N CH3 N-R,s H3C N CH, N-R,s' l l - R,4 H n R14 R14. H 6

(Vl**) wherein n6 is a number from 2 to 14, in particular a number from 2 to 6, Rid, R,2, R,4 and R,s are as defined above, the radicals R,4' independently of one another have one of the meanings given for R,4, the radicals R,5' independently of one another have one of the meanings given for it's, and the groups -N(R,4')(R,s') are identical or different.

According to a preferred embodiment, all groups -N(R,4')(R,5') are -N(C,C,2alkyi)2, in particular -N(C4Hg)2 and all Soups -N(R,4)(R,s) are H3C:CH3

N \N-H

1 '7< H3C C 3

The starting materials of the formula (Vl*) or (Vl**) have preferably a polydispersity of 1 to 1.7, 1 to 1.65, 1 to 1.6, 1 to 1.55,1 to 1.5,1 to 1.45,1.1 to 1.7, 1.1 to 1.65, 1.1 to 1.6, 1.1 to 1.55, 1.1 to 1.5, 1.1 to 1.45, 1.2 to 1.7, 1.2 to 1.65, 1.2 to 1.6, 1.2 to 1.55, 1.2 to 1.5, or 1. 2 to 1.45. A polydispersity of 1.1 to 1.5 is particularly preferred.

GPC (Gel Permeation Chromatography) is used as an analytical procedure for separating molecules by their difference in size and to obtain molecular weight averages(Mw, Mn) or information on the molecular weight distribution of polymers.

- 36 The technique is well known and described, for instance, in "Modern Size -

Exclusion Liquid Chromatography" by W.W.Yan et al., edited by J.Wiley & Sons, N.Y., USA, 1979, pages 4-8, 249-283 and 315-340.

The GPC analyses of this application are carried out with a GPC chromatograph Perkin-Elmer LC 250 equipped with Perkin-Elmer Rl detector LC 30 and with Perkin-Elmer oven LC 101.

All the analyses are carried out at 45 C by using three columns PLGEL 3 Am Mixed E 300 mm length x 7.5 mm i.d. (from Polymers Laboratories Ltd. Shropshire, U.K). Tetrahydrofurane is used as eluant (flow 0.40 ml/min) and the samples are dissolved in tetrahydrofurane (2%) (% w/v).

EXAMPLE OF A PREPARATION PROCESS

The products described under a) to q) above can be prepared in analogy to known methods; for example by treating the abovementioned 2,2,6,6tetramethylpiperidine derivative starting materials with an acylating agent such as an acyl chloride, an organic anhydride, a carboxylic acid or a carboxylic ester. A preferred acylating agent is an organic anhydride, in particular acetic anhydride. The molar ratio between the 2, 2,6,6-tetramethyl-4-piperidyl groups in the starting material and the acylating agent depends on the desired degree of acylation in the final product. In order to acylate 50 % of the original 2,2,6,6-tetramethyl-4-

piperidyl groups in a compound, preferably 0.6 equivalents of acylating agent are used for one equivalent of 2,2,6,6-tetramethyl-4-piperidyl group to be acylated. The reaction is conveniently carried out in an inert organic solvent, for example toluene, xylene, benzene, n-

hexane, an ether, tetrahydrofuran, chloroform or dichloromethane. Preferred solvents are xylene and toluene. The temperature is preferably 0 to 1 40 C, depending on the selected acylating agent. When the acylating agent is an organic anhydride, a temperature of 80 to 1350C is preferred.

According to a particularly preferred embodiment of the invention, the acylation of the appropriate starting material is carried out using carboxylic acid anhydride, in particular acetic anhydride. Pursuant to this method, as a maximum, only 50 % of the 2,2,6,6

- 37 tetramethyl-4-piperidyl NH-groups can be acylated since the other 50 % of these >NH-

groups form a salt with the carboxylic acid liberated. After neutralizing with an appropriate base, e.g. NaOH, the corresponding free 2,2,6,6tetramethyl-4-piperidyl groups are obtained from the salt. After isolation, the resultant product can be reacted in a second step with further carboxylic acid anhydride to give a product with a higher acylation degree, which in turn can again be reacted with carboxylic acid anhyciride to give a product with an even higher acylation degree and so on. This procedure is illustrated in more detail e.g. in present EXAMPLES 1 B and 2.

Therefore, a preferred embodiment of this invention also relates to a product containing 5 to 85 % of a group (A-1-a) and/or (A-1-b) H3C CH3

IN-H (A-1-a) H3C CH3

\/ S\:N-C,-C3alky! (A-1-b) H3C CH3

and 15 to 95 % of a group (A-2-a), V IN-C,-Czoacyl (A-2-a) H3C CH3

the total sum of the groups (A-1 -a), (A-1 -b) and (A-2-a) being 100 %; obtainable (1) by reacting an appropriate starting material containing two or more groups of the formula (A-1 -a) H3C CH3

*IN-H (A-1-a) H3C CH3

- 38 with C2-C40carboxylic acid anhydride in a molar ratio of up to 0.6 equivalent C2-C40carboxylic acid anKydride per 1 equivalent groups of the formula (A-1-a) to obtain an intermediate product which contains groups of the formula (A-2-a) \/ {;N-Ci-C20acyi (A-2-a) H3C CH3

and groups of the formula (A-2-b) \/ SON-H C1-C20acyl-O (A-2-b) H3C CH3

in a molar ratio of about 1: 1, reacting this intermediate with a base, e. g. an aqueous NaOH solution, to convert the groups of the formula (A-2-b) to groups of the formula (A-1-a), and isolating the resultant product; and (2) optionally repeating step (1) until the desired acylation degree is obtained.

in the above explanations, a preferred meaning of C,-C20acyl is C2C20acyl or C2-C,Oacyl or C2-CBacyl and a preferred meaning of C2C40carboxylic acid anhydride is C4-C40carboxylic acid anhydride or C4C20carboxylic acid anhydride or C4-C,6 carboxylic acid anhydride.

In general, the definition of the terminal groups which saturate the free valences in the products of the formulae (Vl), (Vll), (V111-1), (V111-2), (V111-3), (IX), (Xl), (X111) and (XIX) depend on the processes used for their preparation. The terminal groups can also be modified after the preparation of the products.

In the products of the formula (Vl), the end group attached to the diamino radical may be for example hydrogen, C -C20acyl, (C,-C8alkoxy) carbonyl, (Cs-C,2cycloalkoxy)carbonyl, (C1-C8alkyl)aminocarbonyl, (Cs-C, 2cycloalkyl)aminocarbonyl,

- 39 (C7-Cgphenylalkyl)aminocarbonyl, C,-C8alkyl, Cs-c12cycloalkyl which is unsubstituted or substituted by 1, 2 or 3 C1-C4alkyl; C3-C6alkenyi, C7csphenylalkyl which is unsubstituted or substituted on the phenyl by 1, 2 or 3 C1-C4alkyl; -CH2CN or a group of the formula N I// NI R1s NO N, R14 N R1st Q ' 1 ll4 wherein the radicals R14' independently of one another have one of the meanings given for R,4, and the radicals R15' independently of one another have one of the meanings given for R'5 The end group attached to the triazinic ring may be for example halogen, e.g. Cl, or a group N Rt2 N-A' 1 1 Ott Rt3 with A' being hydrogen, Ct-C20acyl, (C1-C8alkoxy)carbonyl, (Cs-cl2cycloalkoxy)carbonyl, (C1-C8alkyl) aminocarbonyl, (C5-C,2cycloalkyl)aminocarbonyl, (C7-Cgphenylalkyl) aminocarbonyl, C1-C8alkyl, C5-C,2cycloalkyl which is unsubstituted or substituted by 1, 2 or 3 C,-C4alkyl; C3-C6alkenyl, C7-Cgphenylalkyl which is unsubstituted or substituted on the phenyl by 1, or 3 C1-C4alkyl; CH2CN or a group of the formula I/ NI Rts R14' N-Pus' n14 wherein the radicals R,4' independently of one another have one of the meanings given for R14, and the radicals R15' independently of one another have one of the meanings given for R1s When the end group attached to the triazinic ring is halogen, it is advantageous to replace it, for example, by -OH or an amino group when the reaction is complete. Examples of amino groups which may be mentioned are pyrrolidin-1-yl, morpholino, -NH2, -N(C1C8alkyi)2 and

- 40 -NR(C,-Caalkyl), in which R is hydrogen or a group of the formula (IV).

In the products of the formula (Vll), the terminal group bonded to the silicon atom can, for example, be (R,6)3Si-O- and the end group bonded to the oxygen atom can, for example, be -Si(R16)3 The products of the formula (Vu) can also exist as cyclic products if n3 is a number from 3 to 10; in other words, the free valences depicted in the structural formula in that case form a direct bond.

In the intermediates of the formula (V111-1), (V111-2) and (V111-3), the terminal group bonded to the triazine radical is, for example, Cl or a group H CH3 -IN 7<N-H

ig H3C CH3 and the terminal group bonded to the amino radical is, for example, hydrogen or a group N l N 9 4 \ / N 3\,, C4Hg-n H3C it< CH3 H3C it< CH3 H3C I CH3 H3C IN CH3

H H In the products of the formula (IX), the terminal group bonded to the 2,5-dioxopyrrolidine ring is, for example, hydrogen and the terminal group bonded to the radical -C(R27)(R2.3)- is, for example,

Ko or I O IR26 IR21

Rzs H3C ACHE

H3C I CH3

Rep

- 41 In the products of the formula (Xl), the terminal group bonded to the dimethylene radical can, for example, be -OH and the terminal group bonded to the oxygen can, for example, be hydrogen. The terminal groups can also be polyether radicals.

in the products of the formula (Xl11), the terminal group bonded to the carbonyl radical is, for example,

Hó<CH3

-0 R4

H3C CH3

and the terminal group bonded to the oxygen radical is, for example, O o H3C\/CH3 11 11 / \

C R CH R37 CH-R33 C 0 R4,.

O-C C-O

1 1 H3C CH3

H3C <CH3 H3C CH3

H3C I CH3 H3C N CH3

R41 R41

In the products of the formula (XIX), the terminal groups are for example hydrogen.

The products according to this invention are very effective in improving the light, heat and oxidation resistance of organic materials, especially synthetic polymers and copolymers.

Examples of organic materials which can be stabilized are: 1. Polymers of monoolefins and diolefins, for example polypropylene, polyisobutylene, po-

lybut-1-ene, poly-4-methylpent-1-ene, polyisoprene or polybutadiene, as well as polymers of cycloolefins, for instance of cyclopentene or norbornene, polyethylene (which optionally can be crosslinked), for example high density polyethylene (HDPE), high density and high mole-

cular weight polyethylene (HDPE-HMW), high density and ultrahigh molecular weight poly

- 42 ethylene (HDPE-UHMW), medium density polyethylene (MOPE), low density polyethylene (LOPE), linear low density polyethylene (LLDPE), (VLDPE) and (ULDPE).

Polyolefins, i.e. the polymers of monoolefins exemplified in the preceding paragraph, prefe-

rably polyethylene and polypropylene, can be prepared by different, and especially by the following, methods: a) radical polymerization (normally under high pressure and at elevated temperature).

b) catalytic polymerization using a catalyst that normally contains one or more than one metal of groups iVb, Vb, Vlb or Vlil of the Periodic Table. These metals usually have one or more than one ligand, typically oxides, halides, alcoholates, esters, ethers, amines, alkyls, alkenyis and/or aryls that may be either a- or cr-coordinated.

These metal complexes may be in the free form or fixed on substrates, typically on activated magnesium chloride, titanium(l11) chloride, alumina or silicon oxide. These catalysts may be soluble or insoluble in the polymerization medium. The catalysts can be used by themselves in the polymerization or further activators may be used typically metal alkyls, metal hydrides, metal alkyl halides, metal alkyl oxides or metal alkyloxanes, said metals being elements of groups la, Ha and/or Illa of the Periodic Table. The activators may be modified conveniently with further ester, ether, amine or silyl ether groups. These catalyst systems are usually termed Phillips, Standard Oil Indiana, Ziegler (-Natta), TNZ (DuPont), metallocene or single site catalysts (SSC).

2. Mixtures of the polymers mentioned under 1), for example mixtures of polypropylene with polyisobutylene, polypropylene with polyethylene (for example PP/HDPE, PP/LDPE) and mixtures of different types of polyethylene (for example LDPE/HDPE).

3. Copolymers of monoolefins and diolefins with each other or with other vinyl monomers, for example ethylene/propylene copolymers, linear low density polyethylene (LLDPE) and mixtures thereof with low density polyethylene (LDPE), propylene/but-1-ene copolymers, propylene/isobutylene copolymers, ethylene/but-1-ene copolymers, ethylene/hexene copo-

1ymers, ethyiene/methylpentene copolymers, ethylene/heptene copolymers, ethylene/octane copolymers, propyiene/butadiene copolymers, isobutylene/isoprene copolymers, ethy

- 43 lene/alkyl acrylate copolymers, ethylene/alkyd methacrylate copolymers, ethylene/vinyl ace-

tate copolymers and their copolymers with carbon monoxide or ethylene/acrylic acid copo-

lyrners and their salts (ionomers) as well as terpolymers of ethylene with propylene and a diene such as hexadiene, dicyclopentadiene or ethylidene-norbornene; and mixtures of such copolymers with one another and with polymers mentioned in 1) above, for example polypropylene/ethylene-propylene copolymers, LDPE/ethylene-vinyl acetate copolymers (EVA), LDPE/ethylene-acrylic acid copolymers (EAA), LLDPE/EVA, LLDPE/EM and alter-

nating or random polyalkylene/carbon monoxide copolymers and mixtures thereof with other polymers, for example polyamides.

4. Hydrocarbon resins (for example Cs-Cg) including hydrogenated modifications thereof (e.g. tackifiers) and mixtures of polyalkylenes and starch.

5. Polystyrene, poly(p-methylstyrene), poly(a-methylstyrene).

6. Copolymers of styrene or cc-methylstyrene with dienes or acrylic derivatives, for example styrene/butadiene, styrene/acrylonitrile, styrene/alkyl methacrylate, styrene/butadiene/alkyl acrylate, styrene/butadiene/alkyl methacrylate, styrene/maleic anhydride, styrene/acryloni-

trile/methyl acrylate; mixtures of high impact strength of styrene copolymers and another polymer, for example a polyacrylate, a diene polymer or an ethylene/propylene/diene terpo-

lymer; and block copolymers of styrene such as styrene/butadiene/styrene, styrene/iso-

prene/styrene, styrenelethylenelbutylenelstyrene or styrene/ethylene/propylene/ styrene.

7. Graft copolymers of styrene or a-methylstyrene, for example styrene on polybutadiene, styrene on polybutadiene-styrene or polybutadieneacrylonitrile copolymers; styrene and acrylonitrile (or methacrylonitrile) on polybutadiene; styrene, acrylonitrile and methyl meth-

acrylate on polybutadiene; styrene and maleic anhydride on polybutadiene; styrene, acrylo-

nitrile and maleic an hyd ride or maleim ide on polybutadiene; styrene and maleimide on poly-

butadiene; styrene and alkyl acrylates or methacrylates on polybutadiene; styrene and acry-

lonitrile on ethylene/propylene/diene terpolymers; styrene and acrylonitrile on polyalkyl acry-

lates or polyalkyl methacrylates, styrene and acrylonitrile on acrylate/butadiene copolymers, as well as mixtures thereof with the copolymers listed under 6), for example the copolymer mixtures known as ABS, MBS, ASA or AES polymers.

- 44 8. Halogen-containing polymers such as polychloroprene, chlorinated rubbers, chlorinated and brominated copolymer of isobutylene-isoprene (halobutyl rubber), chlorinated or sulfo-

chlorinated polyethylene, copolymers of ethylene and chlorinated ethylene, epichlorohydrin homo- and copolymers, especially polymers of halogencontaining vinyl compounds, for example polyvinyl chloride, polyvinylidene chloride, polyvinyl fluoride, polyvinylidene fluoride, as well as copolymers thereof such as vinyl chloride/vinylidene chloride, vinyl chloride/vinyl acetate or vinylidene chloride/vinyl acetate copolymers.

9. Polymers derived from a,0-unsaturated acids and derivatives thereof such as polyacry-

lates and polymethacrylates; polymethyl methacrylates, polyacrylamides and polyacryloni-

triles, impact-modified with butyl acrylate.

10. Copolymers of the monomers mentioned under 9) with each other or with other unsatu-

rated monomers, for example acrylonitrile/ butadiene copolymers, acrylonitrile/alkyl acrylate copolymers, acrylonitrile/alkoxyalkyl acrylate or acrylonitrile/vinyl halide copolymers or acry-

lonitrile/ alkyl methacrylate/butadiene terpolymers.

11. Polymers derived from unsaturated alcohols and amines or the acyl derivatives or ace-

tals thereof, for example polyvinyl alcohol, polyvinyl acetate, polyvinyl stearate, polyvinyl benzoate, polyvinyl maleate, polyvinyl butyral, polyallyl phthalate or polyallyl melamine; as well as their copolymers with olefins mentioned in 1) above.

12. Homopolymers and copolymers of cyclic ethers such as polyalkylene glycols, polyethy-

lene oxide, polypropylene oxide or copolymers thereof with bisqlycidyl ethers.

13. Polyacetals such as polyoxymethylene and those polyoxymethylenes which contain ethylene oxide as a comonomer; polyacetals modified with thermoplastic polyurethanes, acrylates or M8S. 14. Polyphenylene oxides and sulfides, and mixtures of polyphenylene

oxides with styrene polymers or polyamides.

- 45 15. Polyurethanes derived from hydroxyl-terminated polyethers, polyesters or polybutadi-

enes on the one hand and aliphatic or aromatic polyisocyanates on the other, as well as precursors thereof.

16. Polyamides and copolyamides derived from diamines and dicarboxylic acids and/or from aminocarboxyiic acids or the corresponding lactams, for example polyamide 4, polyamide 6, polyamide 6/6, 6/10, 6/9, 6/12, 4/6, 12/12, polyamide 11, polyamide 12, aromatic polyamides starting from mxylene diamine and adipic acid; polyamides prepared from hexamethylenediamine and isophthalic or/and terephthalic acid and with or without an ela-

stomer as modifier, for example poly-2,4,4,-trimethylhexamethylene terephthalamide or poly-

m-phenylene isophthalamide; and also block copolymers of the aforementioned polyamides with polyolefins, olefin copolymers, ionomers or chemically bonded or grafted elastomers; or with polyethers, e.g. with polyethylene glycol, polypropylene glycol or polytetramethylene glycol; as well as polyamides or copolyamides modified with EPDM or ABS; and polyamides condensed during processing (RIM polyamide systems).

17. Polyureas, polyimides, polyamide-imides, polyetherimids, polyesterimids, polyhydantoins and polybenzimidazoles.

18. Polyesters derived from dicarboxylic acids and diols and/or from hydroxycarboxylic acids or the corresponding lactones, for example polyethylene terephthalate, polybutylene terephthalate, poly-1,4dimethylolcyclohexane terephthalate and polyhydroxybenzoates, as well as block copolyether esters derived from hydroxyl-terminated polyethers; and also poly-

esters modified with polycarbonates or MBS.

19. Polycarbonates and polyester carbonates.

20. Polysulfones, polyether sulfones and polyether ketones.

21. Crosslinked polymers derived from aldehydes on the one hand and phenols, ureas and melamines on the other hand, such as phenol/formaldehyde resins, urea/formaldehyde re-

sins and melamine/formaldehyde resins.

22. Drying and non-drying alkyd resins.

- 46 23. Unsaturated polyester resins derived from copolyesters of saturated and unsaturated dicarboxylic acids with polyhydric alcohols and vinyl compounds as crosslinking agents, and also halogen-containing modifications thereof of low flammability.

24. Crosslinkable acrylic resins derived from substituted acrylates, for example epoxy acry-

lates, urethane acrylates or polyester acrylates.

25. Alkyd resins, polyester resins and acrylate resins crosslinked with melamine resins, urea resins, isocyanates, isocyanurates, polyisocyanates or epoxy resins.

26. Crosslinked epoxy resins derived from aliphatic, cycloaliphatic, heterocyclic or aromatic glycidyl compounds, e.g. products of diglycidyl ethers of bisphenol A and bisphenol F. which are crosslinked with customary hardeners such as anhydrides or amines, with or without accelerators. 27. Natural polymers such as cellulose, rubber, gelatin and chemically modified homologous derivatives thereof, for example cellulose acetates, cellulose propionates and cellulose butyrates, or the cellulose ethers such as methyl cellulose; as well as rosins and their derivatives. 28. Blends of the aforementioned polymers (polyblends), for example PP/EPDM, Poly-

amide/EPDM or ABS, PVC/EVA, PVC/ABS, PVC/MBS, PC/ABS, PBTP/ABS, PC/ASA7 PC/PBT, PVC/CPE, PVC/acrylates, POM/thermoplastic PUR, PC/thermoplastic PUR, POM/acrylate, POM/MBS, PPO/HIPS, PPO/PA 6.6 and copolymers, PA/HDPE, PA/PP, PA/PPO, PBT/PC/ABS or PBT/PET/PC.

29. Naturally occurring and synthetic organic materials which are pure monomeric com-

pounds or mixtures of such compounds, for example mineral oils, animal and vegetable fats, oil and waxes, or oils, fats and waxes based on synthetic esters (e.g. phthalates, adipates, phosphates or trimellitates) and also mixtures of synthetic esters with mineral oils in any weight ratios, typically those used as spinning compositions, as well as aqueous emulsions of such materials.

- 47 30. Aqueous emulsions of natural or synthetic rubber, e.g. natural latex or latices of carbo-

xylated styrene/butadiene copolymers.

The invention thus also relates to a composition comprising an organic material susceptible to degradation induced by light, heat or oxidation and at least one product according to this invention. The organic material is preferably a synthetic polymer, more particularly one selected from the aforementioned groups. Polyolefins, in particular polyethylene and polypropylene, are preferred. Polycarbonate such as listed in item 19 above, and blends of polycarbonate, such as listed in item 28 above are also preferred.

An organic material of interest is further a thermoplastic polyolefin, PP/EPDM, black pigmented PC-PBT blend, PVDC, PBT, PET, PVC or ASA/PVC.

Blends of polycarbonate with various styrenic polymers represent a growing family of materials for automotive usage. In particular blends of polycarbonate / acrylonitrile-

butadiene-styrene and polycarbonate / acrylonitrile-styrene-acrylate are experiencing significant growth for automotive interior and exterior construction respectively. These materials offer an attractive combination of properties conferred by both components -

improved notch sensitivity and high impact strength, lower melt viscosity and processing temperatures compared to pure polycarbonate. The light stabilization of pigmented polycarbonate / styrenic blends is a complex issue due to several factors, including the composition of the polymer blend components, and the selection and concentration of light and heat stable pigments. For instance, acrylonitrile-butadiene-styrene can be prepared by mass, emulsion, or hybrid technologies each of which carries over varying levels of emulsifiers, coagulants and stabilizers into the final polymer blend. The acrylonitrile-styrene-

acrylate and acrylonitrile-butadiene-styrene terpolymers are multiphase materials of various compositions. The type of rubber and rubber content of such styrenic polymers can influence the gloss, color, impact and heat aging properties as the polymer (blend) undergoes weathering. An impediment to even further growth of the pigmented or molded-in-color grades, is the difficulty in providing adequate light stabilization for a broad color palette. Copious

- 48 information exists on the photodegradation and stabilization of the individual polycarbonate and styrenic polymers, yet limited information exists on the photodegradation of their blends.

The light stabilization of polycarbonate blends is more complex than simply using the standard stabilizer systems for each polymer component in the blend.

Acceptable stabilizers for use in blends of polycarbonate should exhibit minimal detrimental interaction with the polymers during high temperature extrusion or molding. Melt rheology is a rapid method to assess the stability of a polymer in the melt state and thus to relate the interaction of any additives to changes in apparent melt viscosity and ultimately the molecular weight of the polymer. When melt rheology is conducted at a single, constant shear rate, a decrease in apparent melt viscosity over time can indicate that polymer degradation and molecular weight reduction is occurring.

The products according to this invention exhibit a significantly lower effect on polymer melt viscosity ratio than other sterically hindered amines. Further, they show only minimal interaction with the polymer blend in the molten state. The products according to this invention also improve color protection and retention of high impact strength, in particular in various pigmented polycarbonate / acrylonitrile-butadienestyrene blends.

A further embodiment of this invention is a method for stabilizing an organic material against degradation induced by light, heat or oxidation, which comprises incorporating into said organic material at least one product according to this invention.

The products according to this invention can be used in various proportions depending on the nature of the material to be stabilized, on the end use and on the presence of other additives. In general, it is appropriate to use, for example, 0.01 to 5 % by weight of the products of this invention, relative to the weight of the material to be stabilized, preferably 0.05 to 2 %, in particular 0.05 to 1 %.

The products of this invention can be added, for example, to the polymeric materials before, during or after the polymerization or crosslinking of the said materials. Furthermore, they can

- 49 be incorporated in the polymeric materials in the pure form or encapsulated in waxes, oils or polymers. In general, the products of this invention can be incorporated in the polymeric materials by various processes, such as dry mixing in the form of powder, or wet mixing in the form of solutions or suspensions or also in the form of a masterbatch which contains the products of this invention in a concentration of 2.5 to 25 % by weight, in such operations, the polymer can be used in the form of powder, granules, solutions, suspensions or in the form of!atices.

The materials stabilized with the products of this invention can be used for the production of mouldings, films, tapes, monofilaments, fibres, surface coatings and the like.

If desired, other conventional additives for synthetic polymers, such as antioxidants, UV absorbers, nickel stabilizers, pigments, fillers, plasticizers, corrosion inhibitors and metal deactivators, can be added to the organic materials containing the products of this invention.

Particular examples of said conventional additives are: 1. Antioxidants 1. 1. Alkylated monophenols, for example 2,6-di-tert-butyl-4-methylphenol, 2- tert-butyi-4,6-di-

methylphenol, 2,6-di-tert-butyl-4-ethylphenol, 2,6-di-tert-butyl-4-nbutylphenol, 2,6-di-tert-bu-

tyl-4-isobutylphenol, 2,6-dicyclopentyl-4-methylphenol, 2-(amethylcyclohexyl)-4,6-dimethyl-

phenol, 2,6-dioctadecyl-4-methylphenol, 2,4,6-tricyclohexylphenol, 2,6-ditert-butyl-4-

methoxymethylphenol, nonylphenols which are linear or branched in the side chains, for example, 2,6-di-nonyl-4-methylphenol, 2,4-dimethyl-6-(1'methylundec-1'-yl)phenol, 2,4-di-

methyl-6-(1'-methylheptadec-1'-yl)phenol, 2,4-dimethyl-6-(1'-methyltridec1'-yl)phenol and mixtures thereof.

1.2. Alkylthiomethvlphenols, for example 2,4-dioctylthiomethyl-6-tertbutylphenol, 2,4-dioc-

tylthiomethyl-6-methylphenol, 2,4-dioctylthiomethyl-6-ethylphenol, 2,6-didodecylthiomethyl-

4-nonylphenol.

- 50 1.3. Hydroquinones and alkvlated hydroquinones, for example 2,6-ditert-butyl-4-methoxy-

phenol, 2,5-di-tert-butylhydroquinone, 2,5-di-tert-annylhydroquinone, 2,6diphenyl-4-octade-

cyloxyphenol, 2,6-di-tert-butylhydroquinone, 2,5-di-tert-butyl-4hydroxyanisole, 3,5-di-tert-

butyl-4-hydroxyanisole, 3,5-di-tert-butyl-4-hydroxyphenyl stearate, bis(3,5-di-tert-butyl-4-

hydroxyphenyl) adipate.

1.4. Tocopherols, for example c -tocopherol, p-tocopherol, y-tocopherol, &-tocopherol and mixtures thereof (Vitamin E).

1.5. Hvdroxylated thiodi,ohenyl ethers, for example 2,2'-thiobis(6-tertbutyl-4-methylphenol), 2,2'-thiobis(4-octylphenol), 4,4'-thiobis(6-tertbutyl-3-methylphenol), 4,4'-thiobis(6-tert-butyl-

2-methylphenol), 4 43-thiabis-(3 6-di-sec-amylphenol), 4,4'-bis(2,6dimethyl-4-hydroxyphe-

nyl)disulfide. 1.6. Alkviidenebisphenols, for example 2,2'-methylenebis(6tert-butyl-4-methylphenol), 2,2'-

m ethylenebis(6-tert-butyl-4-ethylphenol), 2,2'-methylenebis[4-methyl-6-( -m ethylcyclohexyl)-

phenol], 2,2'-methylenebis(4-methyl-6-cyclohexylphenol), 2,2'methylenebis(6-nonyi-4-me-

thylphenol), 2,2'-methylenebis(4,6-di-tert-butylphenOI), 2,2'ethylidenebis(4,6-di-tert-butyl-

phenol), 2,2'-ethylidenebis(6-tert-butyl-4-isobutylphenol), 2,2'methylenebis[6-( x-methylben-

zyl)-4-nonylphenol], 2,2'-methylenebis[6-(cc,a-dimethylbenzyl)-4nonylphenol], 4,4'-methy-

lenebis(2,6-di-tert-butylphenol), 4,4'-methylenebis(6-tert-butyl-2methylphenol), 1,1-bis(5-

tert-butyl-4-hydroxy-2-methylphenyl)butane, 2,6-bis(3-tert-butyl-5-methyl2-hydroxybenzyl)-4-

methylphenol, 1,1,3-tris(5-tert-butyl-4-hydroxy-2-methylp he nyl)butane, 1,1 -bis(5-tert-butyl-4-

hydroxy-2-methyl-phenyl)-3-n-dodecylmercaptobutane, ethylene glycol bis[3, 3-bis(3'-tert-

butyl-4'-hydroxyphenyl)butyrate], bis(3-tert-butyl-4-hydroxy-5-methylphenyl)dicyclopentadi-

ene, bis[2-(3'-tert-butyl-2'-hydroxy-5'-methylbenzyl)-6-te rt-butyl-4methylphenyl]terephthalate, 1,1-bis-(3,5-dimethyl-2-hydroxyphenyl)butane, 2,2-bis-(3,5-di-tert-butyl-4-hydroxyphe-

nyl)propane, 2,2-bis-(5-tert-butyl-4-hydroxy2-methylphenyl)-4-ndodecylmercaptobutane, 1,1,5,5-tetra-(5-tert-butyl-4-hydroxy-2-m ethylphenyl)pentane.

1.7. O-, N- and S-benzyl compounds, for example 3,5,3',5'-tetra-tertbutyl-4,4'-dihydroxydi-

benzyl ether, octadecyl-4-hydroxy-3,5-dimethylbenzylmercaptoacetate, tridecyl-4-hydroxy-

3,5-di-tert-butylbenzylme rcaptoacetate, tris(3,5-di-te rt-butyl-4hydroxybenzyl)am ine, bis(4

- 5 1 tert-butyl-3-hydroxy-2 6-dimethylbenzyl)dithioterephthalate' bis(3, 5-di-tert-butyl-4-hydroxy-

benzyl)sulfide, isooctyl-3 5-di-tert-butyl-4-hydroxybenzylmercaptoacetate.

1.8. HvdroxvUenzvlated malonates, for example dioctadecyl-2,2-bis-(3,5-ditert-butyl-2-hy-

droxybenzyl)-malonate, di-octadecyl-2-(3-tert-butyl-4-hydroxy-5methylbenzyl)-malonate, di-

dodecylmercaptoethyl-2,2-bis-(3,5-di-tert-butyl-4-hydroxybenzyl) malonate, bis[4-(1,1,3,3-te-

tramethylbutyl)phenyl]-2,2-bis(3,5-di-tert-butyl-4-hydroxybenzyl) malonate.

1.9. Aromatic hvdroxvbenzyl compounds, for example 1,3,5-tris-(3,5-ditert-butyl-4-hydroxy-

benzyl)-2,4,6-trimethylbenzene, 1,4-bis(3,5-di-tert-butyl-4-hydroxybenzyl) -2,3,5,6-tetrame-

thylbenzene, 2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)phenol.

1.10. Triazine Compounds, for example 2,4-bis(octylmercapto)-6-(3,5-ditert-butyl-4-hy-

droxyanilino)-1,3,5-triazine, 2-octylmercapto-4,6-bis(3,5-di-tert-butyl-4hydroxyanilino)-1,3,5-

triazine, 2-octylmercapto-4,6-bis(3,5-di-tert-butyl-4-hydroxyphenoxy)-1,3, 5-triazine, 2,4,6-

tris(3,5-di-tert-butyl-4-hydroxyphenoxy)-1,2,3-triazine, 1,3,5-tris-(3,5di-tert-butyl-4-hydroxy-

benzyl) isocyanurate, 1,3,5-tris(4-tert-butyl-3-hydroxy-2, 6-dim ethylbenzyl)isocyanurate, 2,4,6-

tris(3,5-di-tert-butyl-4-hydroxyphenylethyl)-1,3,5-triazin e, 1,3,5tris(3,5-di-tert-butyl-4-

hyd roxyphenylpropionyl)-hexahydro-1,3,5-triazine, 1,3,5-tris(3, 5dicyclohexyl-4-hydroxyben-

zyl)isocyanurate. 1.11. Benzylphosphonates, for example dimethyl-2,5-ditert-butyl-4-hydroxybenzylphospho-

nate, diethyl-3,5-d i-tert-butyl-4-hydroxybenzylphosphonate, dioctadecyl3, 5-di-te rt-butyl-4-hy-

droxybenzylphosphonate, dioctadecyl-5-tert-butyl-4-hydroxy-3methylbenzylphosphonate, the calcium salt of the monoethyl ester of 3,5di-tert-butyl-4-hydroxybenzylphosphonic acid.

1.12. Acylaminophenols, for example 4-hydroxylauranilide, 4hydroxystearanilide, octyl N-

(3,5-di-tert-butyl-4-hydroxyphenyl)carbamate. 1.13 Esters of c-(3,5-ditert-butYI-4-hYdroxvPhenyl)nropionic acid with mono- or polyLydric alcohols, e.g. with methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanediol, 1,9-

nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethy-

lene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl) isocyanurate, N,N'-bis(hy

- 52 droxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylol-

propane, 4-hydroxymethyl- 1 -phospha-2,6, 7-trioxabicyclo[2.2.2 joctane.

1.14. Esters of f3-(5-tert-butvl-4-hvdroxv-3-methYlphenyl)nropionic acid with mono- or poly-

hydric alcohols, e.g. with methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexane-

diol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl) isocyanurate, N,N'-

bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3 thiapentadecanol, trimethylhexanedjol, trimethylolpropane, 4-hydroxymethyl-1 -phospha-2, 6, 7-trioxabicyclo[2.2.2]octane.

1.15. Esters of 0-(3,5-dicyclohexyl-4-hydroxYphenyl)propionic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'bis(hydroxyethyl)ox-

amide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hy-

droxymethyl-1 -phospha-2,6,7-trioxabicyclo[2.2.2]octane.

1.16. Esters of 3,5-di-tert-butyl-4-hydroxyPhenvl acetic acid with monoor polyhydric alco-

hols, e.g. with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'-bis(hydroxyethyl)ox-

amide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hy-

droxym ethyl- 1 -phospha-2, 6,7-trioxabicyclo[2.2.2]octane.

1.17. Amides of,6-(3,5-di-tert-butvl-4-hYdroxYphenvl)propionic acid e.g. N,N'-bis(3,5-di-tert-

butyl-4-hydroxyphenylprop jonyl) hexamethylenediamide, N. N'-bis (3,5-ditert-butyl-4-hydroxy-

phenylpropionyl)trimethylenediamide, N,N'-bis(3,5-di-tert-butyl-4hydroxyphenylpropionyl)-

hydrazide, N,N'-bis[2-(3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyloxy) ethyl]oxamide (Naugard@XL-1 supplied by Uniroyal).

1.18. Ascorbic acid (vitamin C) 1.19. Aminic antioxidants for example N, N'-di-isopropyl-p-phenylenediamine, N,N'-di-sec-

butyl-p-phenylenediamine, N,N'-bis(1,4-dimethylpentyl)-p-phenylenediamine, N,N'-bis(1

- 53 ethyl-3-methylpentyl)-p-phenylenediamine, N,N'-bis(l-methylheptyl)-pphenylenediamine, N,N'-dicyclohexyl-p-phenylenediamine, N,N'-diphenyl-pphenylenediamine, N,N'-bis(2-naph-

thyl)-p-phenylenediamine, N-isopropyl-N'-phenyl-p-phenyienediamine, N-(1, 3-dimethylbutyl)-

N'-phenyl-p-phenylenediamine, N-(1-methylheptyl)-N'-phenyl-pphenylenediamine, N-cyclo-

hexyl-N'-phenyl-p-phenlenediamine, 4-(p-toluenesulfamoyl)diphenylamine, N, N'-dimethyl-

N,N'-di-sec-butyl-p-phenylenediamine, diphenylamine, N-allyldiphenylamine, 4-isopropoxy-

diphenylamine, N-phenyl-1-naphthylamine, N-(4-tert-octylphenyl)-1naphthylamine, N-phe-

nyl-2-naphthylamine, octylated diphenylamine, for example p,p'-di-tertoctyldiphenylamine, 4-

n-butylaminophenol, 4-butyrylaminophenol, 4-nonanoylaminophenol, 4dodecanoylamino-

phenol, 4-octadecanoylaminophenol, bis(4-methoxyphenyl)amine, 2,6-di-tertbutyl-4-dime-

thylaminomethylphenol, 2,4'-diaminodiphenylmethane, 4,4'diaminodiphenylmethane, N. N. N', N'-tetramethyl-4,4'-diaminodiphenylm ethane, 1,2-bis[(2-methylphenyl)amino]ethane, 1,2-bis(phenylamino)propane, (o-tolyl)biguanide, bis[4-(1',3'-dimethylbutyl)phenyl]amine, tert-

octylated N-phenyl-1-naphthylamine, a mixture of mono- and dialkylated tert-butyl/tert-

octyldiphenylamines, a mixture of mono- and dialkylated nonyidiphenylamines, a mixture of mono- and dialkylated dodecyldiphenylamines, a mixture of mono- and dialkylated isopro-

pyl/isohexyidiphenylamines, a mixture of mono- und dialkylated tertbutyldiphenylamines, 2,3-dihydro-3,3-dimethyl-4H-1,4-benzothiazine, phenothiazine, a mixture of mono- und dial-

kylated tert-butyl/tert-octylphenothiazines, a mixture of mono- und dialkylated tert-octyl-phe-

nothiazines, N-allylphenothiazin, N,N,N',N'-tetraphenyl-1,4-diaminobut-2ene, N,N-bis-

(2,2, 6, 6-tetram ethyl-piperid-4-yl-hexam ethylenediamine, bis(2,2,6,6tetramethylpiperid-4-yl)-

sebacate, 2,2,6,6-tetramethylpiperidin-4-one, 2,2,6,6tetramethylpiperidin-4-ol.

2. UV absorbers and liqht stabilisers 2.1. 2-(2'-Hvdroxyphenvl) benzotriazoles' for example 2-(2'-hydroxy-5'-methylphenyl)-benzo-

triazole, 2-(3',5'-di-tert-butyl-2'-hydroxyphenyl)benzotriazole, 2-(5'tert-butyl-2'-hydroxyphe-

nyl)benzotriazole, 2-(25-hydroxy-5'-(1,1,3,3-tetramethylbutyl)phenyl) benzotriazole, 2-(3',5'-di-

tert-butyl-2'-hydroxyphenyl)-5-chloro-benzotriazole, 2-(3'-tert-butyl- 2'hydroxy-5'-methylphe-

nyl)-5-chloro-benzotriazole, 2-(3'-sec-butyl-5'-tert-butyl-2'hydroxyphenyl)benzotriazole, 2-(2'-

hyd roxy-4'-octyloxyphenyl) benzotriazole, 2-(3',5'-di-te rt-amyl-2'hydroxyphenyl)benzotriazole, 2-(3',5'-bis-( x, x-dimethylbenzyl)-2'hydroxyphenyl)benzotriazole, 2-(3'-tert-butyl-2'-hydroxy-

5'-(2-octyloxycarbonyiethyl)phenyl)-5-chloro-benzotriazole, 2-(3'-tertbutyl-5'-[2-(2-

ethylhexyloxy)-carbonylethyl]-2 -hydroxyphenyl)-5-chloro-benzotriazole, 2(3'-tert-butyl-2'-hy

- 54 d roxy-5'-(2-m ethoxycarbonylethyl) phenyl)-5-chloro-benzotriazole, 2-(3'-tert-butyl-2'-hydroxy-

5'-(2-methoxycarbonylethyl)phenyl)benzotriazole, 2-(3'-tert-butyl-2'hydroxy-5'-(2-octyloxy-

carbonylethyl)phenyl)benzotriazole, 2-(3'-tert-butyl-5'-[2-(2ethythexyloxy)carbonylethyl]-2'-

hydroxyphenyl)benzotriazole, 2-(3'-dodecyl-2'-hydroxy-5'-methylphenyl) benzotriazole, 2-(3'-

tert-butyl-2'-hydroxy-5'-(2-isooctyloxycarbonylethyl)phenyibenzotriazole, 2,2'-methylene-bis-

[4-(1,1,3,3-tetramethylbutyl)-6-benzotriazole-2-ylphenol]; the transesterification product of 2-

[3'-tert-butyl-5'-(2-methoxycarbonylethyl)-2'-hydroxyphenyl]-2HbenzOtriazole with polyethy lene glycol 300; R-CH2CH2 COO-CH2CH2: where R - 3'-tert-butyl-4'-hydroxy-5'-2H benzotriazol-2-ylphenyl, 2-[2'-hydroxy3'-(ala-dimethylbenzyl)-5'-(1,1,3,3-tetramethylbutyl)-

phenyl]benzotriazole; 2-[2'-hydroxy-3'-( 1,1,3,3-tetramethylbutyl)-5'-(a, cc-dimethylbenzyl)-

phenyl]benzotriazole. 2.2. 2-Hvdroxybenzophenones, for example the 4hydroxy, 4-methoxy, 4-octyloxy, 4-decyl-

oxy, 4-dodecyloxy, 4-benzyloxy, 4,2',4'-trihydroxy and 2'-hydroxy-4,4'dimethoxy derivatives.

2.3. Esters of substituted and unsubstituted benzoic acids, as for example 4-tertbutyl-phenyl salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoyl resorcinol, bis(4-tert-butylben-

zoyl) resorcinol, benzoyl resorcinol, 2,4-di-tert-butylphenyl 3,5-di-tertbutyl-4-hydroxybenzo-

ate, hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, octadecyl 3,5-di-tertbutyl-4-hydroxy-

benzoate, 2-methyl-4,6-di-tert-butylphenyl 3,5-di-tert-butyl-4hydroxybenzoate.

2.4. Acrylates, for example ethyl cc-cyano-0, -diphenylacrylate, isooctyl cc-cyano-p, -diphe-

nylacrylate, methyl cc-carbomethoxycinnamate, methyl cc-cyano-,6-methyl-pmethoxy-cinna-

mate, b utyl cc-cyano- 3-methyl-p-methoxy-cin namate, methyl acarbomethoxy-p-methoxycin-

namate and N-( -carbomethoxy- -cyanovinyl)-2-methylindoline.

2.5. Nickel compounds, for example nickel complexes of 2,2'-thio-bis-[4(1,1,3,3-tetrame-

thylbutyl)phenol], such as the 1:1 or 1:2 complex, with or without additional ligands such as n-butylamine, triethanolamine or Ncyclohexyldiethanolamine, nickel dibutyidithiocarbamate, nickel salts of the monoalkyl esters, e.g. the methyl or ethyl ester, of 4-hydroxy-3,5-ditert-

butylbenzylphosphonic acid, nickel complexes of ketoximes, e.g. of 2hydroxy-4-methylphe-

nyl undecylketoxime, nickel complexes of 1-phenyl-4-lauroyl-5hydroxypyrazole, with or without additional ligands.

- 55 2.6. Sterically hindered amines, for example bis(2 2 6 6-tetramethyl4-piperidyl)sebacate' bis(2,2,6,6-tetramethyl-4-piperidyl)succinate, bis(1,2,2,6, 6-pentamethyl-4-piperidyl)sebacate, his ( 1 -octyloxy-2,2,6, 6-tetram ethyl-4-piperidyl)sebacate, bis( 1,2,2, 6, 6-pentamethyl-4-pi-

peridyl) n-butyl-3 5-di-tert-butyl-4-hydroxybenzylmalonate, the condensate of 1-(2-hydroxy-

ethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, linear or cyclic condensates of N. N'-bis(2,2,6, 6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-tert-octylamino-2,6-

dichloro- 1,3,5-triazine, tris(2,2,6,6-tetramethyl-4-piperidyl) nitrilotriacetate, tetrakis(2,2,6, 6-

tetramethyl-4-piperidyl)-1,2,3,4-butane-tetracarboxylate, 1,1'-(1,2ethanediyl)-bis(3,3,5,5-

tetramethylpiperazinone), 4-benzoyl-2,2,6,6-tetramethylpiperidine, 4stearyloxy-2,2,6,6-

tetramethylpiperidine, bis( 1,2,2,6, 6-pentamethylpiperidyl)-2-n-butyi-2(2-hydroxy-3,5-di-tert-

butylbenzyl)malonate, 3-n-octyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5] decan-2,4-dione, bis( 1 -octyloxy-2,2, 6, 6-tetramethylpiperidyl)sebacate, bis( 1 -octyloxy-2,2,6, 6-tetram e-

thylpiperidyl)succinate, linear or cyclic condensates of N,N'-bis-(2,2,6, 6-tetramethyl-4-piperi-

dyl)hexamethylenediamine and 4-morpholino-2,6-dichloro-1,3,5-triazine, the condensate of 2-chloro-4,6-bis(4-n-butylamino-2,2,6,6tetramethylpiperidyl)-1,3,5-triazine and 1,2-bis(3-

aminopropylamino)ethane, the condensate of 2-chloro-4,6-di-(4-nbutylamino-1,2,2,6,6-pen-

* tamethylpiperidyl)-1,3,5-triazine and 1,2-bis-(3-aminopropylamino)ethane, 8-acetyl-3-dode-

cyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decane-2,4-dione, 3-dodecyl1-(2,2,6,6-tetrame-

thyl-4-piperidyl)pyrrolidin-2,5-dione, 3-dodecyl- 1-(1,2,2,6, 6pentamethyl-4-piperidyl)pyrroli-

dine-2,5-dione, a mixture of 4-hexadecyloxy- and 4-stearyloxy-2,2,6,6tetramethylpiperidine, a condensation product of N,N'-bis(2,2,6,6tetramethyl-4-piperidyl)hexamethylenediamine and 4-cyclohexylamino-2,6dichloro-1,3,5-triazine, a condensation product of 1,2-bis(3-ami-

nopropylamino)ethane and 2,4,6-trichloro-1,3,5-triazine as well as 4butylamino-2,2,6,6-te-

tramethylpiperidine (CAS Reg. No. [136504-96-6]); N-(2,2,6,6-tetramethyl4-piperidyl)-n-do-

decylsuccinimid, N-(1,2,2,6,6-pentamethyl-4-piperidyl)-ndodecylsuccinimid, 2-undecyl-

7,7,9,9-tetramethyl-1-oxa-3,8-diaza-4-oxo-spiro[4,5]decane, a reaction product of 7,7,9,9-

tetramethyl-2-cycloundecyl-1-oxa-3,8-diaza-4-oxospiro [4,5]decane und epichlorobydrin, 1,1-

bis( 1,2,2,6, 6-pentamethyl-4-piperidyloxycarbonyl)-2-(4-methoxyphenyi) ethene, N, N'-bis-

formyl-N, N'-bis(2,2, 6,6-tetram ethyl-4-piperidyl)hexamethyle nediamine, diester of 4-methoxy-

methylene-malonic acid with 1,2,2,6,6-pentamethyl-4-hyd roxypipe ridine, poly[methylpropyl-3-

oxy-4-(2,2,6,6-tetramethyl-4-piperidyl)]siloxane, reaction product of maleic acid anhydride- -

olefin-copolymer with 2,2,6,6-tetramethyl-4-aminopiperidine or 1,2,2,6,6pentamethyl-4-

aminopiperidine.

- 56 2.7 Oxamides, for example 4,4'-dioctyloxyoxanilide, 2,2'diethoxyoxanilide, 2,2'-dioctyloxy-

5,5'-di-tert-butoxanilide, 2,2'-didodecyloxy-5,5'-di-tert-butoxanilide, 2ethoxy-2'-ethyloxanilide, N,N'-bis(3-dimethylaminopropyi)oxamide, 2ethoxy-5-tert-butyl-2'-ethoxanilide and its mixture with 2-ethoxy-2'ethyl-5,4'-di-tert-butoxanilide, mixtures of o- and p-methoxydisubstituted oxanilides and mixtures of o- and p-ethoxy-disubstituted oxanilides.

2.8. 2-(2-Hvdroxyphenyl)-1,3,5-triazines, for example 2,4,6-tris(2hydroxy-4-octyloxyphenyl)-

1,3,5-triazine, 2-(2-hydroxy-4-octyloxyphenyl)-4,6-bis(2,4-dimethylphenyl) -1 3 5-triazine, 2-

(2,4-dihydroxyphenyl)-4,6 bis(2,4-dimethylphenyl)-1,3,5-triazine, 2,4bis(2-hydroxy-4-pro-

pyloxyphenyl)-6-(2, 4-dimethylp henyl)-1,3,5-triazine, 2-(2-hydroxy-4octyloxyphenyl)-4, 6-bis-

(4-methylphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-dodecyloxyphenyl)-4,6bis(2,4-dimethylphe-

nyl)-1,3,5-triazine, 2-(2-hyd roxy-4-tridecyloxyphenyl)-4, 6-b is(2,4dimethylphenyl)-1,3,5-tri-

azine, 2-[2-hydroxy-4-(2-hyd roxy-3-butyloxy-propoxy)phenyl]-4,6-bis(2,4dimethyl)-1,3,5-tri-

azine, 2-[2-hyd roxy-4-(2-hydroxy-3-octyloxy-propyloxy)ph enyl]-4, 6bis(2,4-dimethyl)-1, 3,5-

triazine, 2-[4-(dodecyloxy/tridecylOxy-2-hydroxypropoxy)-2-hydroxy-phenyl]-4,6-bis(2,4-di-

methy!phenyl)-1,3,5-triazine, 2-[2-hydroxy-4-(2-hyd roxy-3-dodecyloxypropoxy)phenyl]-4,6-

bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-hexyloxy)phenyl-4, 6-diphenyl-1,3,5-

triazine, 2-(2-hydroxy-4-methoxyphenyl)-4,6-diphenyl-1,3,5-triazine, 2,4, 6-tris[2-hydroxy-4-(3-

butoxy-2-hydroxy-propaxy)phenyl]-1,3,5-triazine, 2-(2-hydroxyphenyl)-4-(4methoxyphenyl)-

6-phenyl-1,3,5-triazine, 2-{2-hydroxy-4-[3-(2-ethylhexyl-1-oxy)-2hydroxypropyloxy]phenyl}-

4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine. 3. Metal deactivators, for example N,N'-diphenyloxamide, N-salicylal-N'-salicyloyl hydrazine, N. N'bis(salicyloyl) hydrazine, N. N'-bis(3,5-di-tert-butyl-4-hyd roxyphenylpropionyl) hyd razine, 3-salicyloylamino-1,2,4-triazole, bis(benzylidene)oxalyl dihydrazide, oxanilide, isophthaioyl dihydrazide, sebacoyl bisphenylLydrazide, N,N'-diacetyladipoyl dIhydrazide, N,N'bis(salicyl-

oyl)oxalyl dihydrazide, N,N'-bis(salicyloyl)thiopropionyl dihydrazide.

4. Phosphites and phosphonites, for example triphenyl phosphite, diphenyl alkyl phosphites, phenyl dialkyl phosphites, tris(nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phos-

phite, distearyl pentaerythritol diphosphite, tris(2,4-di-tertbutylphenyl) phosphite, diisodecyl pentae ryth ritol d i p h osp h ite, b is (2, 4-di-te rt-butylphe nyl) pen tae ryth ritol diphosphite, bis (2, 6d i-

tert-butyl-4-methylphenyl)-pentaerythritol diphosphite, diisodecyloxypentaerythritol di

- 57 phosphite, bis(2, 4-di-tert-butyl-6-methylphenyl)pentaeryth ritol diphosphite, bis(2,4,6-tris(tert-

butylphenyl)pentaerythritol diphosphite, tristearyl sorbitol triphosphite, tetrakis(2,4-di-tert-bu-

tylphenyl) 4,4'-biphenylene diphosphonite, 6-isooctyloxy-2141811o-tetratert-butyl-12H-d benz[d,g]- 1,3,2-dioxaphosphocin, 6-f luoro-2,4,8, 1 0tetra-tert-butyl-1 2-methyl-dibenz[d,g]-

1,3,2-dioxaphosphocin, bis(2,4-di-tert-butyl-6-methylphenyl) methyl phosphite, bis(2,4-di-tert-

butyl-6-methylphenyl) ethyl phosphite, 2,2',2"-nitrilo[triethyltris(3,3', 5,5'-tetra-tert-butyl-1,1'-

biphenyl-2,2'-diyl)phosphite], 2-ethylhexyl(3,3',5,5'-tetra-tert-butyl-1, 1'-biphenyl-2,2'-di-

yl)phosphite. 5. Hydroxyiamines1 for example, N,N-dibenzylKydroxylamine, N,N-diethylhydroxylamine, N. N-dioctylhydroxylamine, N. Ndilaurylhydroxylamine, N. N-ditetradecylhydroxylamine, N. N-

dihexadecylhyd roxylamin e, N. N-dioctadecylhydroxylamine, N-hexadecyl-Noctadecylhy-

droxylamine, N-heptadecyl-N-octadecylLydroxylamine, N,Ndialkylhydroxylamine derived from hydrogenated tallow amine.

6. Nitrones, for example, N-benzyl-alpha-phenyl-nitrone, N-ethyl-alphamethyl-nitrone, N-oc-

tyl-alpha-h eptyl-n itrone, N-lauryl-alpha-undecyl-nitrone, N-tetradecylalpha-tridcyl-nitrone, N-

hexadecyl-alpha-pentadecyl-nitrone, N-octadecyl-alpha-heptadecyl-nitrone, N-hexadecyl-

alpha-heptadecyl-nitrone, N-ocatadecyl-alpha-pentadecyl-nitrone, Nheptadecyl-alpha-hep-

tadecyl-nitrone, N-octadecyl-alpha-hexadecyl-nitrone, nitrone derived from N,N-dialkylhy-

droxylamine derived from hydrogenated tallow amine.

7. Thiosvnercists, for example, dilauryl thiodipropionate or distearyl thiodipropionate.

8. Peroxide scavenaers, for example esters of p-thiodipropionic acid, for example the lauryl, stearyl, myristyl or tridecyl esters, mercaptobenzimidazole or the zinc salt of 2-mercapto-

benzimidazole, zinc dibutyldithiocarbamate, dioctadecyl disulfide, pentaerythritol tetrakis( -

dodecylmercapto)propionate. 9. Polvamide stabilisers, for example, copper salts in combination with iodides and/or phos-

phorus compounds and salts of divalent manganese.

lO. Basic co-stabilisers, for example, melamine, polyvinylpyrrolidone, dicyandiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali

- 58 metal salts and alkaline earth metal salts of higher fatty acids for example calcium stearate, zinc stearate, magnesium behenate, magnesium stearate, sodium ricinoleate and potassium palmitate, antimony pyrocatecholate or zink pyrocatecholate.

11. Nucleating agents, for example, inorganic substances such as talcum, metal oxides such as titanium dioxide or magnesium oxide, phosphates, carbonates or sulfates of, preferably, alkaline earth metals; organic compounds such as mono- or polycarboxylic acids and the salts thereof, e. g. 4-tert-butylbenzoic acid, adipic acid, diphenylacetic acid, sodium succinate or sodium benzoate; polymeric compounds such as ionic copolymers (ionomers).

12. Fillers and reinforcing agents, for example, calcium carbonate, silicates, glass fibres, glass bulbs, asbestos, talc, kaolin, mica, barium sulfate, metal oxides and hydroxides, car-

bon black, graphite, wood flour and flours or fibers of other natural products, synthetic fibers.

13. Other additives, for example, plasticizers, lubricants, emulsifiers, pigments, rheology additives, catalysts, flow-control agents, optical brighteners, flameproofing agents, antistatic agents and blowing agents.

14. Benzofuranones and indolinones, for example those disclosed in U.S. 4, 325,863; U.S. 4,338,244; U.S. 5,175,312; U.S. 5,216,052; U.S. 5,252,643; DE-A-4316611;

DE-A-4316622; DE-A-4316876; EP-A-0589839 or EP-A-0591102 or 3-[4-(2acetoxyethoxy)-

ph enyl]-5,7-di-tert-butyl-benzofuran-2-one, 5,7-di-tert-butyl-3-[4-(2stearoyloxyethoxy)phe-

nyl]benzofuran-2-one, 3,3'-bis[5,7-di-tert-butyl-3-(4-[2-hydroxyethoxy] phenyl)benzOfuran-2-

one], 5,7-di-te rt-butyl-3-(4-ethoxyphenyl)benzof uran-2-one, 3-(4acetoxy-3,5-dim ethylphe-

nyl)-5,7-di-tert-butyl-benzofuran-2-one, 3-(3,5-dimethyl-4pivaloyloxyphenyl)-5,7-di-tert-butyl-

benzofuran-2-one, 3-(3,4-dim ethylphenyl)-5,7-di-tert-butyl-benzof uran-2one, 3-(2,3-di-

methylphenyl)-5,7-di-tert-butyl-benzofuran-2-one. The weight ratio of the compounds of this invention to the conventional additives may be 1:0.5 to 1:5.

The products according to this invention are preferably used in combination with a pigment and/or an UV absorber.

- 59 The products of the invention can also be used as stabilizers, especially as light stabilizers, for almost all materials known in the art of photographic reproduction and other reproduction techniques as e.g. described in Research Disclosure 1990, 31429 (pages 474 to 480).

The invention is illustrated in more detail by the following Examples. All percentages are by weight, unless otherwise indicated.

In the structural formulae of the following examples, n2', n3' and n7' indicate that there are repetitive units in the molecules and the products obtained are not uniform. In the following examples, the acylation degree is determined as described below.

DETERMINATION OF THE ACYLATION DEGREE

The analytical determinations are carried out by titration, in a non aqueous environment, using perchloric acid in isopropanol as reagent and a mixture (1:1) of chloroform and acetonitrile as solvent.

Two different measurements are needed to get the result: in the first one, the starting material (oligomer carrying only free NH groups in the piperidyl moieties) is titrated, obtaining a number (A) index of the amount of free NH groups in the compound; the second titration is performed on the final acylated product and gives the number (B) index of the residual free NH groups after the acylation reaction.

The "% acylation degree" is calculated as (100 - Bx100/A).

EXAMPLE 1:

A) Preparation of the intermediate of the formula

- 60 H3C-C-N (CH2)6 N N _ N (CH2)6 N -3 CH

H 3C TIC H3 H3C TIC H3 H9C4-N H3C C H 3 H3C C H3

H H H3C CH3 H

H3C N CH3

H n2, A solution of 37.1 g (0.175 moles) of N-(2,2,6,6-tetramethyl-4piperidinyl)-n-butylamine in 30 ml of water is slowly added at 0 C to a solution of 32.2 g (0.175 moles) of cyanuric chloride in 250 ml of xylene, keeping the temperature during the addition and for further 1 hour. After 2 hours at room temperature, the mixture is cooled to 0 C and an aqueous solution of 7.3 g (0.18 moles) of sodium hydroxide in 25 ml of water is added.

After l/2 hour at 0 C and further 2 hours at room temperature, the aqueous solution is separated off and 34.6 g (0.087 moles) of N,N'-bis[2, 2,6,6-tetramethyl-4-piperidinyl]-1,6-

hexanediamine are added.

The mixture is heated to 50 C for 1 hour and 24.2 g (0.175 moles) of ground potassium carbonate are added and heated to 60 C for 4 hours.

After washing with water, the organic phase is concentrated under vacuum at 60 -70 C/10 mbar, being 125 ml of xylene recovered.

69 9 (0.175 moles) of N,N'-bis[2,2,6,6-tetramethyl-4-piperidinyl]-1,6hexanediamine are added and the mixture is heated to 150 C for 2 hours, cooled again and 79 (0.175 moles) of ground sodium hydroxide are added.

The mixture is heated to 140 C for further 4 hours, being the residual water of reaction eliminated off azeotropically, and for further 4 hours at 160 C.

After cooling to 60 C, the mixture is diluted with 130 ml of xylene, filtered and washed three times with 50 ml of ethylene glycol.

- 61 After concentrating under vacuum at 60QC/10 mbar, 7.5 9 (0.073 moles) of acetic anLydride are added. After 1/2 hour at room temperature, the mixture is heated to 130 C for5 hours.

After cooling to room temperature, 20.2 g (0.146 moles) of ground potassium carbonate are added and the mixture is heated to 1 30 C for 2 hours.

Then, the mixture is cooled to 50 C, filtered and concentrated under vacuum at 140 C/1 mbar.

A solid with a melting range of 128 -1 34 C is obtained after drying.

On (by GPC) = 2712 g/mole Mw/Mn = 1.41 B) Preparation of the product of the formula O O

H3C-C- I (CH2)6 1 N N N (CH2)6 1 -C-CH;

H3C it, CH3 H3C it< CH3 H9C -N H3C CH3 H3C < CH3 H3C N CH3 H3C I CH3 1 H3C N CH3 H. C N CH3

R,o R,o H3C CH3 Rio R1o H3C I CH3

_ R10 _ n2' wherein 45 to 55 % of the radicals Rio are acetyl and the remaining radicals R'o are hydrogen. 150 g (1.47 mol) of acetic anhydride are added to a solution of 290 g of the intermediate described under A), dissolved in 400 ml of toluene. The solution is heated to reflux for eight hours. Then, the solution is cooled to 60 C and 13.1 g of NaOH in 500 ml of water are slowly added. The mixture is left under stirring for additional 5 hours. After cooling to room temperature, the organic layer is separated, washed three times with 100 ml of water, dried over sodium sulfate and concentrated under vacuum. The desired product is obtained as a white powder with a melting range of 127 - 137 C.

- 62 Mn (by GPC) = 2500 gJmoie Mw/Mn = 1.33 EXAMPLE 2: Preparation of the product of the formula H3C-C-N (C H2)6 N N N (CH2)6-N -C-CH3

H3C C H3 H3C C Ha H9C, H3C CH3 HaC C H3 Rlo Rio H3C CH3 to to H3C I CH3

Rlo n2, wherein 70 to 80 % of the radicals Rio are acetyl and the remaining radicals Rio are hydrogen. 40 g of acetic anhydride are added to a solution of 145 9 of the intermediate of EXAMPLE 1 B) in 200 ml of toluene. The solution is heated to reflux for 6 hours. Then, the solution is cooled to room temperature and a solution of 48 g of NaOH in 200 ml of water is added. The mixture is heated to 70 C and allowed to react for additional 6 hours. The organic phase is separated off, washed three times with 100 ml of water, dried over sodium sulfate and evaporated under vacuum. The desired product is obtained as a white powder with a melting range of 132 -138 C.

Mn (by GPC) = 2650 g/moie Mw/Mn = 1.29 EXAMPLE 3: Preparation of the compound of the formula

- 63 o H3C-C-N (CH2)6 N,N N (CH2)6 N--C-CH3

H3C:J J < CH3 H3C CH3HyC4-N H3C CH3 H3C CH3 H3C N CH3 H3C N CH3l H3C IN CH3 H3C N CH3 Rio R,oH3C; CH3 Rio Rio H3C N C H3

Rlo n2' wherein 55-65 % of the radicals Rio are acetyl and the remaining radicals Rio are methyl.

70 g of the compound of EXAMPLE 1 B are dissolved in an aqueous solution of 15.5 g (0.34 mol) of formic acid in 100 ml of water. Then, 15 g (0.5 mol) of paraformaldehyde are added and the aqueous solution is heated under reflux for 16 hours. After cooling to room temperature, 100 ml of xylene are added. After stirring for 2 hours, 15.5 g (0.39 mol) of NaOH in 100 ml of water are added. Subsequently, the organic phase is separated off, washed twice with water and dried over sodium sulfate. After filtration, the organic phase is evaporated under vacuum. The desired product is obtained as a white powder with a melting range of 134 -1 39 C.

EXAMPLE 4: Preparation of the compound of the formula a H3C-C-N (CH2)6 N, N N (CH2)6 N -C-CH3

H3C CH3 H3C >(11, CH I H9C4-N H3C CH3 H3C CH3

H3C N CH3 H3C N CH3 l H3C IN CH3 H3C N CH3 R 1 o R. 1 o 3 N C H 3 'a R o Rlo n29 wherein 15-25 % of the radicals Rio are acetyl and the remaining radicals Rio are hydrogen.

Following the procedure reported in EXAMPLE 1 B and using the appropriate amount of reagents (6.5 g of acetic anhydride for 51.5 g of the compound of EXAMPLE 1A) the desired compound is obtained as a white powder with a melting range of 125 -l 33 C.

- 64 EXAMPLE 5: Preparation of the compound of the formula C Hg H9C, I N N (CH2)6 N N ' N (CH2)6 N 1 N N

| N N CH3 H3C CH, H3C CH3 H3C CH3 H9C

9 I H,C N CH3 H3C N CH, | H,C N CH3 H,C N CH3

N C4H9 R1c H9C, N R,o R c HgC. N C Hg 1 1 H3C; CH3 C4Hg H3C N CH,

R,o wherein 55-65 % of the radicals R o are acetyl and the remaining radicals R o are hydrogen.

Following the procedure reported in EXAMPLE 1 B. using the commercial product CHIMASSORB 2020 as starting material and the right amount of reagents (155 g of acetic anhydride for 300 g of CHIMASSORB 2020) the desired compound is obtained as a white powder with a melting range of 126 -135 C.

EXAMPLE 6: Preparation of the compound of the formula C,H9 H9C,

I N N (CH2 6 N N N (CH2)S-N 1 N N

| N, N 'L: J: LN N J: J: gn2 N, N | C H. H3C CH3 H3C CH3 H3C 1 CH3 H3C CH3 H9C,

g H3C N CH3 H3C N CH3 | H3C N CH3 H3C N CH3 I-C4Hg HgC' N R c R1c HgC,-

11 1

C4Hg | H3C; CH3 C Hg H3C N CH3

R,o wherein 75-85 % of the radicals R'o are acetyl and the remaining radicals R o are hydrogen Following the procedure reported in EXAMPLE 1 B. using the product of EXAMPLE 5 as starting material and the right amount of reagents (77.8 9 of acetic anhydride for 150 9 of the product of EXAMPLE 5) the desired compound is obtained as a white powder with a melting range of 131 -1 38 C.

- 65 EXAMPLE 7:

A) Preparation of the intermediate of the formula: 0 0

H3C-C-N (CH7)6-N,N N (CH2)6 N -C-CH3

H3C. CH3 H3C < CH3 H3C CH3 H3C CH3

H3C N CH3 H3C N CH3 H-N H3C Nl CH3 H3C N CH3 H H H3C-f-CH3 H H Cl H2 H3Cf-C H3 CH3 _ n2t Following the procedure reported in EXAMPLE 1A, using the commercial product CHIMASSORB 944 as starting material and the right amount of reagents (50 9 of acetic anLydride for 400 g of CHIMASSORB 944) the desired intermediate is obtained with a melting range of 120 -125 C.

B) Preparation of the compound of the formula: H3C-C-N (CH2)6 N r, N. N(CH2)6 N I C-CH3 H3C < CH3 H3C CH3 H3C CH3 H3C CH3

H3C N CH3 H3C N CH3H-N H3C N CH3 H3C N CH3

R,o R1oH3C-Cl-CH3 Rio R1o H3C-C-CH3

CH3 n2t wherein 45-55 % of the radicals R o are acetyl and the remaining radicals R o are hydrogen.

Following the procedure reported in EXAMPLE 1 B. using the intermediate of EXAMPLE 7A as starting material and the right amount of reagents (175 g of acetic anhydride for 340 g of

- 66 the compound of EXAMPLE 7A) the desired compound is obtained as a white powder with a melting range of 121 -127 C.

EXAMPLE 8: Preparation of the compound of the formula: 0 0 H3C-C-N (CH2)6N N N-(CH2)6 N -C-CH3

H3C in. CH3 H3C CH3 N H3C CH3 H3C CH3 H3C N CH3 H3C I CH3 H3C N CH3 H3C N CH3

Rio 810Rto Rlo _ no' wherein 50-60 % of the radicals R,o are acetyl and the remaining radicals R,o are hydrogen.

Following the procedure reported in EXAMPLE 1 B. using the commercial product CYASORB UV 3346 as starting material and the right amount of reagents (99.4 9 of acetic anhydride for 160 9 of CYASORB UV 3346) the desired compound is obtained as a white powder with a melting range of 122 -1 34 C.

EXAMPLE 9: Preparation of the compound of the formula c, c, H3C-C-N (CH2) 6-N N (CH2)6 N -C-CH3

H3C i< CH3 H3C >[ CH3 N. H3C CH3 H3C CH3 H3C N CH3 H3C Nl CH3 H3C N CH3 H3C N CH3 R,o no R,o R,o _ nz, wherein 70-80 % of the radicals Rio are acetyl and the remaining radicals Rio are hydrogen.

Following the procedure reported in EXAMPLE 1 B. using the compound of EXAMPLE 8 as starting material and the right amount of reagents (41.5 9 of acetic anhydride for 80 9 of the compound of EXAMPLE 8) the desired compound is obtained as a yellow powder with a melting range of 135 143 C.

- 67 EXAMPLE 10: Preparation of the compound of the formula _ li o-

(: HZ)3

H Cat N C H R13 _ _ n3, wherein 70-80 % of the radicals R,8 are acetyl and the remaining radicals R'a are hydrogen.

Following the procedure reported in EXAMPLE 1 B. using the commercial product UVASIL 299 as starting material and the right amount of reagents (21.6 g of acetic anhydride for 38 g of UVASIL 299) the desired compound is obtained as an orange oil.

EXAMPLE 11:

Following the procedure reported in EXAMPLE 1 B. using the commercial product UVASORB HA 88 which contains groups of the formula (A-1-a) \/ INH (A- 1 -a) H3C CH3

as starting material and the right amount of reagents (80 g of acetic anhydride for 62 g of UVASORB HA 88) the desired compound wherein 55-65 % of the groups (A-1-a) are acetylated is obtained as a yellow powder with a melting range of 126 -131 C.

EXAMPLE 12: Preparation of the compound of the formula

- 68 - O CH3 o o CH3 _-C-CH2 CH CH-CH2 C-O-CH2 1 C-CH2-O-_

O=C I =0 CH3 0 0 CH3

O O H3C CH3 H3C CH3

H3C N CH3 H3C N CH3

_ R4, R41 _ n7) wherein 75^85 % of the radicals R4, are acetyl and the remaining radicals R4, are hydrogen.

Following the procedure reported in EXAMPLE 1B and using the commercial product MARK LA 68 as starting material and the right amount of reagents (30 g of acetic anhydride for 40 g of MARK LA 68) the desired compound is obtained as a pale brown powder with a melting range of 92 -97 C.

EXAMPLE_13. Preparation of the product mixture of the formula Rg N IN -' N (CH2)3-N -CH2CH2-

H3C CH3 C H N H N N

H3C C H HgC4 N N N C4Hg H3C I C n3 H3C CH3 H. C CH3 wherein 55-65 % of the radicals Rg are acetyl and the remaining radicals Rg are hydrogen.

Fo".;,, the procedure reported in EXAb D'.; , us ng the commercial product CHIMASSOhu 9u as starting material and the right amount of reagents (207 g of acetic anhydride for 350 g of CHIMASSORB 905) the desired product is obtained as a yellow powder with a melting range of 122 -126 C.

- 69 EXAMPLE 14: Preparation of the product mixture of the formula Rg I ' IN (CH2)3 N--_ CH2CH2 H3C CH3 C H Not H NON H C CH HgC4-N N N C4Hg H3C I CH3 H3C cH3 H3C CH3 Rg Rg wherein 55-65 % of the radicals Rg are acetyl and the remaining radicals Rg are methyl.

Following the procedure described in EXAMPLE 3 and using the compound of EXAMPLE 13 as starting material the desired product is obtained as a yellow powder with a melting range of 132 -136 C.

EXAMPLE 15: Preparation of the product mixture of the formula H3COC-N (CH2) 3 N-COCH3

H3C> CH3 H3C CH3

H3C Nl CH3 H3C N CH3 R42 R42

wherein 55-65 % of the radicals R42 are acetyl and the remaining radicals R42 are hydrogen.

Following the procedure reported in EXAMPLE 1 B and using N,N'-bis{2,2,6, 6-

tetramethypiperidin^4-yl}hexane-1,6-diamjne as starting material and the right amount of reagents (112 9 of acetic anhydride for 42 9 of N,N'bis{2,2,6,6-tetramethylpiperidin-4-

yl}hexane-1,6-diamine) the desired product is obtained as a white powder with a melting range of 134 -1 38 C.

- 70 EXAMPLE 16. Preparation of the product mixture of the formula H3C:,3 <CH3

R. to I I (CH2)e 11 O:7<N Rat wherein 75-85 % of the radicals Rig are acetyl and the remaining radicals Ret are hydrogen.

Following the procedure reported in EXAMPLE 1 B and using TINUVIN 770 as starting material and the right amount of reagents (63 g of acetic anKydride for 100 9 of TINUVIN 770) the desired product is obtained as a pale yellow oil.

1H NMR (300 MHz. CDCl) puma 5.1 (m, 2H); 2.2 (m, 4H); 2.1 (s,5H); 1.9 (m, 4H); 1.6 (m, 4H); 1.4 ( s, 12H); 1.3 (s, 12H); 1.2 (m, 8H); 1.0 (t, 4H).

EXAMPLE 1-1: Stabilization of a gray pigmented polycarbonate/acrylon itrile-butadiene-styrene ( PC/ABS) blend.

A commercial PC/ABS blend (@Cycoloy MC 8002) pigmented with 1 % by weight of As ray 9779 from Uniform Color Company is stabilized by addition of 1 % by weight of 2-(2'-hydroxy-3',5'-bis(1",1"-dimethylbenzyi)phenyl) benzOtriazole and 0.5% by weight of the compound indicated in Table 1-1. A sample containing only the 1 % by weight of the benzotriazole stabilizer and an unstabilized sample - both containing 1 % by weight of gray pigment - serve as comparison.

Izod bars (2.5"L x 0.5"W x 0.125"W) are prepared by injection molding on a OBOE 30 machine, barrel temperature 246 - 268 C, die temperature 268 C. Accelerated weathering is performed using an Atlas Ci65,6 Weather-O- meter (XAW), operating in "Dry XAW" mode (ASTM G26-90, method C). After regular intervals, the color change AE according to DIN 6174 is determined. The results are listed in Table 1-1.

Table 1-1:

I Irradiation time: 249.8 hours 750 hours

Stabilizer AE AE None 2.4 7.8 Benzotrlazole stabilizer*) 1.3 5.5 Compound of EXAMPLE 1 B 0.4 2.4 Compound of EXAMPLE 2 0.5 3.1 *) 2-(2'-hydroxy-3, s'-bis( ",1,,-dimethylbenzyl) phenyl)benzotriazole The PC/ABS samples stabilized according to this invention show an excellent color stability.

EXAMPLE 1-2: Stabilization of a blue pigmented polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blend.

Samples are prepared from a commercial PC/ABS blend (@Cycoloy MC 8002) as described in EXAMPLE l-1 except that 1% by weight of BIue 1 20A from Uniform Color Company is used as pigment and is stabilized by addition of 0.75% by weight of 2-(2'-hydroxy-3',5'-

bis(1",1"-dirnethylbenzyl)phenyl)benzotriazole and 0.5% by weight of the compound indicated in Table 1-2. A sample containing only the 0.7S% by weight of the benzotriazole stabilizer and an unstabilized sample - both containing 1 % by weight of blue pigment - serve as comparison. Weathering and assessment is carried out as described in EXAMPLE 1-1.

The results are shown in Table 1-2.

Table 1-2:

Irradiation time: 249.6 hours 749.3 hours 999.8 hours Stabilizer AE AE AE None 3.6 9.7 12.4 Benzotriazole stabilizer*) 2.6 9.7 12.9 Compound of EXAMPLE 1 B 0.5 3.8 6.1 *) 2-(2 -hydroxy-3 lsI-bis(1 1 -dimethylbenzyl) phenyl)benzOtriazole The PC/ABS samples stabilized according to this invention show an excellent color stability, particularly at prolonged exposure intervals.

- 72 EXAMPLE 1-3: Stabilization of a white pigmented polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) blend.

A commercially available white pigmented (TiO2) PC/ABS blend (@Cycoloy MC 8002-822; Polymerland Inc.) is stabilized by addition of 1 % by weight of tris{2,4-di-tert-

butylphenyl}phosphite, 0.75 % by weight of 2-(2'-hydroxy-3',5'-bis(1",1"-

dimethylbenzyl)phenyl)benzotriazole and 0.5 % by weight of the compound indicated in Table 1-3.

The extrusion is carried out on a Leistritz 18 mm corotating, intermeshing twin screw extruder (general temperature profile (throat to die in C): 220, 240, 245, 245, 245, 245, 245; extrudate temperature: 256- 258 C). The polymer is predried in vacuo to < 50 ppm moisture.

Izod bars (2.5"L x 0.5"W x 0.125"W) are prepared by injection molding on a OBOE 50 machine (set temperatures = 268 C, 2680C, 271 C; nozzle = 271 279 C; injection pressure = 49.2 at; holding pressure = 49.2 at; back pressure = 8.44 at).

Accelerated weathering is performed using an Atlas Ci-65 Weather-O-meter (Xenon-Arc Weather-O-meter) operated per ASTM G26-90 method C (black panel temperature: 63 C; irradiance: 0.35 W/m2; inner and outer filters: borosilicate).

The results are listed in Table 1-3.

Table l-3:

Irradiation time: 249.8 hours 750 hours Stabilizer AE AE None 3.8 12.6 _ Compound of EXAMPLE 1B 1.1 6.6 Compound of EXAMPLE 3 1.0 6.1 _ Compound of EXAMPLE 4 1.1 6.5 _ Compound of EXAMPLE 5 1.1 6.8 __ Compound of EXAMPLE 8 1.3 6.9 Compound of EXAMPLE 10 1.1 6.6

- 73 Compound of EXAMPLE11 1.1 6.4 Compound of EXAMPLE13 1.0 6.6 Compound of EXAMPLE14 1.0 6.4 Compound of EXAMPLE16 1.0 5.7 The PC/ABS samples stabilized according to this invention show an excellent color stability.

EXAMPLE11-1: Stabilization of polyethylene films, treated or untreated with pesticides.

The stabilizers indicated in Table 11-1 are mixed with low density polyethylene (LOPE) pellets (@Riblene FF 29 supplied by@ENICHEM, Milano, Italy; melt flow index at 190 C and 2.16 kg: 0.62 g/10 min) in a turbo mixer.

The mixture is extruded at a maximum temperature of 200 C in a Berstorff single-screw extruder and the granules so obtained are compression molded in a Pasadena press for 3 min at 1 70 C. Films of about 150 1lm thickness containing 0.3 % of the stabilizer are obtained. Pressmolded films for pesticide treatment are kept inside a dryer for 24 hours at 30 C, in presence of the vapors emitted by 2 liter of an aqueous solution containing 50 % of 00VAPAM (@Baslini S.p.A., Treviglio, Bergamo, Italy), which, in turn, is an aqueous solution of 382 9 per liter of metam-sodium having the formula CH3-NH-CS-SNa.

Non-treated films are mounted in metal frames while treated films are put into quartz tubes.

Frames and tubes are exposed in an Atlas Ci 65 Xenon Arc Weather-O-meter at 63 C black panel temperature, continues dry cycle, according to ASTM G 26-96. During the exposure, the performance is periodically evaluated measuring the carbonyl increment by means of a Fourier Transform Infrared (FT-IR) Spectrophotometer. The results are summarized in Table 11-1.

Table 11-1:

Pesticide treated; time Non treated; time Stabilizer (hours) to carbonyl (hours) to carbonyi increment = 0.2 increment = 0.1

- 74 Without < 250 < 500 0.3 % of the compound of EXAMPLE 1 B 270 3190 0. 3 % of the compound of EXAMPLE 2 295 4250 (High values indicate a good stabilization.) EXAMPLE 11-2: Stabilization of polypropylene fibres.

0.25 % of the stabilizer listed in Table 11-2 is mixed with polypropylene powder (peopled FL F20 supplied by Montell, Ferrara, Italy; melt flow index at 230 C and 2.16 Kg: 12.2 g/min) in a turbo mixer together with 0. 1 % of tris(2,4-di-t-butylphenyl) phosphite, 0.1 % of calcium monoethyl 3, 5-di-t-butyl-4-hydroxybenzyl-phosphonate, 0.1 % of calcium stearate and 0. 25 % of titanium dioxide ("%" means "% by weight relative to the weight of the polypropylene").

The mixture is extruded at a maximum temperature of 230 C in a Berstorff single-screw extruder and the granules so obtained are converted into multifilaments at a maximum temperature of 260 C by fiber spinning in a Leonard apparatus (120/12 deniers).

Multifilaments for teetering are exposed in a forced circulating air oven for 20 min at 120aC.

Non treated and tentered multifilaments are exposed in an Atias Ci 65 Xenon Arc Weather-

O-meter at 63 C black panel temperature, continues dry cycle, according to ASTM G 26-96.

During the exposure, the performance is periodically evaluated measuring the retained tensile strength by an Instron dynamometer. The results are indicated in Table 11-2.

Table 11-2:

. Stabilizer % retained tensile strength tel quel tentered Without 50 after 200 hours 50 after 150 hours Compound of EXAMPLE 1 B 72 after 1450 hours 72 after 1450 hours . (High values indicate a good stabilization.) EXAMPLE 11-3: Stabilization of polypropylene multifilaments and polypropylene plaques.

Polypropylene multifilaments are prepared as described in EXAMPLE il-2. - 75 Injection molded plaques of 1 mm thickness are prepared, starting by

adding to polypropylene powder (:Moplen S SF supplied by Montell, Ferrara, Italy; melt flow index at 230 C and 2.16 Kg: 2.0 g/min), 0.1 % of the stabilizer listed in Table 11-3, 0.1 % of tris(2,4-di-

tert-butylphenyl) phosphite, 0.5 % of octadecyl-3-(3,5-di-tert-butyl-4-

hydroxyphenyl)propionate and 0.1 % of calcium stearate, and mixing the components in a turbo mixer ("%" means "% by weight relative to the weight of the polypropylene"). The mixture is extruded at a maximum temperature of 230 C in a Berstorff single-screw extruder and the granules so obtained are converted into plaques 1 mm thick by injection molding in a Negri-Bossi press at a maximum temperature of 220 C.

The multifilaments and the plaques so obtained are exposed in a forced circulating air oven at 1 20 C and 1 35 C, respectively.

Evaluations are periodically made until breakage occurs. For multifilaments this event corresponds to falling down of a weight that had been hung to each fiber formulation; for plaques the evaluation is made by bending it with a specific device.

The results are summarized in Table 11-3.

Table 11-3:

Hours to breakage Hours to breakage Stabilizer of multifilaments at of plaques at i 20 C 1 35 C without 120 790 Compound of EXAMPLE 1 B- 1 150 1320 (High values indicate a good stabilization.)

Claims (13)

PP/1-21 885/A/CHM 1 08/DIV 6 - 76 Claims:

1. A product of the formula (X111) 11 11 0 0

_-C-RICH R37 I H-R33 C 0 3 (o XO _ f f H3C CH3 H3C> CH3

H3C I CH3 H3C I CH3

R4, R4' _ n 7 (X111)

in which R36, R37, R38, R39 and R40 independently of one another are a direct bond or C,-C.Oalkylene, the radicals R4., independently of one another are hydrogen, C,-C8alkyl or C.,-C20acyl with 5 to 85 % of the radicals R4, independently of one another being hydrogen or C,-Caalkyl and the remaining radicals R4, being C,-C20acyl, and n7 is a number from 1 to 50.

2. A product according to claim 1 wherein R3, R3.3, R39 and 'R40 independently of one another are C.,-C4alkylene, R37 is a direct bond, and n7 is a number from 1 to 25.

3. A product according to claim 1 corresponding to the formula (X111-a)

- 77 11 - -O-CH-C CH

_ ARC-CH2 I H CH-CH2 C 2 X 1 2

1 1 1 1 H3C 1,CH3 H3C>[ J<CH3

H3C I CH3 H3C N CH3

R4, _ n 7 (Xill-a) wherein 5 to 85 % of the radicals R4, independently of one another are hydrogen or methyl and the remaining radicals R4, are C,C,Oacyl.

4. A product according to claim 3 wherein 20 to 70 % of the radicals R4, independently of one another are hydrogen or methyl and the remaining radicals R4' are C,-C,Oacyl.

5. A product according to claim 3 wherein 15 to 30 % of the radicals R4, independently of one another are hydrogen or methyl and the remaining radicals R., are C,-C,Oacyl

6. A product according to claim 3 wherein the meaning C'-C,Oacyl is acetyl.

7. A composition containing an organic material susceptible to degradation induced by light, heat or oxidation and a product according to claim 1.

8. A composition according to claim 7 wherein the organic material is a synthetic polymer

9. A composition according to claim 7 wherein the organic material is a polyolefin

10. A composition according to claim 7 wherein the organic material is a polycarbonate or a polycarbonate/graft copolymer blend.

- 78

11. A composition according to claim 10, which additionally contains a pigment

12. A composition according to claim 1O7 which additionally contains an UV absorber

13. A method for stabilizing an organic material against degradation induced by light, heat or oxidation, which comprises incorporating into said organic material a product according to claim 1.