Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
  • C08K5/3472—Five-membered rings
  • C08K5/3475—Five-membered rings condensed with carbocyclic rings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/34—Heterocyclic compounds having nitrogen in the ring
  • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
  • C08K5/3477—Six-membered rings
  • C08K5/3492—Triazines
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
  • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31786—Of polyester [e.g., alkyd, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31855—Of addition polymer from unsaturated monomers

Definitions

• the present invention relates to the protection of foodstuffs, beverages, pharmaceuticals, cosmetics, personal care products, shampoos and the like from the deleterious effects of ultraviolet radiation. It has been found that certain highly durable benzotriazoles and tris-aryl-s-triazines are especially effective towards this end when incorporated in the containers or films in which such materials are stored.
• UV ultraviolet
• UV absorber efficiency is a function of how strongly the molecule absorbs light across the entire UV region as well as its thermal and photostability, i.e. durability.
• Tinuvin ® 326 is a benzotriazole UV absorber, 5-chloro-2-(2-hydroxy-3-tert-butyl-5-methyl- phenyl)-2H-benzotriazole, available from Ciba Specialty Chemicals Corp. Milk is packaged in translucent or white pigmented HDPE bottles to reduce the amount of light transmission through the plastic. Fanelli, et al., J. Food Protection, 48(2), 112-117 (1985) disclose that Tinuvin ® 326 in HDPE packaging is effective at reducing the loss rate of Vitamin A in milk exposed to cool white fluorescent light. Protection of vitamins is also of importance in fruit juices. In “Tropicana Twists Again," Packaging World, Jan. 1999, p.2, it is disclosed that PET bottles containing a "UV inhibitor" are used to protect the shelf life of Vitamin C in fruit drinks.
• Tinuvin ® 234 with either Tinuvin ® 327 or Tinuvin ® 326 are known.
• beer is normally bottled in amber or green-tinted glass to protect it from light.
• a highly efficient UV absorber would allow beer to be packaged in, for example, clear PET bottles.
• U.S. Patent Nos. 4,882,412, 4,892,923 and 4,950,732 disclose the use of 7-oxy-2H- 1-benzopypran-2-one, 7-oxy-2H-1-benzopyran-2-imine, 3H-naphtho[2,1-b]pyran-3-one, 3H- naphtho[2,1-b]pyran-3-imine and bis-methine moieties as UV absorbing groups to protect the contents of polyester and polycarbonate containers.
• U.S. Patent No. 5,948,458 teaches the protection of foods containing unsaturated lipids and fats from spoilage due to exposure to UV radiation by incorporation of calcium phosphate compounds either directly into the food product itself or in the food coatings and package wrap.
• UV absorbers of the class of durable benzotriazoles and tris-aryl-s-triazines are especially effective towards protecting the contents of clear, lightly colored and thin-walled containers and films.
• the description, preparation and uses of the 2H-benzotriazole UV absorbers are described in United States Patent Nos. 3,004,896; 3,055,896; 3,072,585; 3,074,910; 3,189,615; 3,230,194; 4,127,586; 4,226,763; 4,278,589; 4,315,848; 4,383,863; 4,675,352; 4,681 ,905 and 4,853,471.
• United States Patent Nos. 5,319,091 and 5,410,071 described the preparation of benzotriazoles substituted at the 5-position of the benzo ring with alkyl- or aryl-sulfonyl moieties. It is taught in United States Patent No. 5,280,124 that by introducing a higher alkyl or aryl sulfoxide or sulfone at the 5-position of the benzo ring of the benzotriazole, the resulting benzotriazole exhibits enhanced absorption in the near visible range (over 350 nm). Such sulfone substituted products were shown to be useful in automotive coatings applications.
• United States Patent No. 3,218,332 discloses benzotriazoles substituted at the 5- position of the benzo ring by a lower alkyl sulfonyl moiety.
• United States Patent Nos. 5,268,450 and 5,319,091 disclose polymer compositions and a process for the production of substituted aryl thio and aryl sulfonyl benzotriazoles which are covIERly bound to polymers, such as poly(phenylene sulfide), RYTON ® , Phillips Petroleum.
• 5,280,124 discloses benzotriazoles with only higher alkyl or aryl sulfinyl or sulfonyl moieties at the 5-position of the benzo ring which are useful for protecting thermoset automotive coatings.
• U.S. Patent No. 5,977,219 and the copending patent application mentioned above teach the use of certain electron withdrawing groups including some sulfonyl groups at the 5- position of the benzo ring for the stabilization of automotive coatings.
• Japanese Patent No. 92-352228 discloses the use of 5-ethylsulfonyl benzotriazoles with the 3-position of the phenyl ring being unsubstituted or substituted by methyl for the UV protection of dust proof poly(vinyl chloride) resin films.
• the description, preparation and uses of the s-triazine UV absorbers are described for automotive coatings, photographic application, polymeric film coatings and ink jet printing. Automotive coatings are described in British 2,317,174A and 2,317,893A and in United States Patent Nos. 5,354,794; 5,556,973; 5,681 ,955; 5,726,309 and 5,106,891. Photographic applications are disclosed in United States Patent No. 3,843,371.
• the s-triazine UV absorbers can be prepared by the general synthetic procedures outlined in United States Patent Nos. 5,726,309; 5,681 ,955 and 5,556,973; British 2.317.714A, WO 96/28431 and EP 941989A2.
• the instant invention also pertains to a method of protecting contents from the deleterious effects of ultraviolet radiation which comprises storage in the clear or lightly colored containers or films of the instant invention.
• the plastic of component (a) is lightly colored it is colored with pigments and/or dyes.
• Plastic containers and films made therefrom transmit significant portions of radiation of the ultraviolet region, i.e. about 280 to about 400 nm.
• Ultraviolet absorbers (UVA's) that are red-shifted absorb radiation towards the 400 nm region of the spectrum more efficiently than UVA's that are not red-shifted.
• UVA's Ultraviolet absorbers
• the clear or lightly colored plastic of component (a) contains an upper limit of about 5 % pigments and/or dyes by weight, in total, based on the weight of the plastic.
• the plastic of component (a) contains an upper limit of about 2 % by weight pigments and/or dyes based on the weight of the plastic.
• the upper limit of pigments and/or dyes in the plastic is about 1 % by weight.
• the UV absorbers of component (b) exhibit excellent compatibility with the plastic containers or films of this invention. Further, they add little or no color to finished plastic containers or films.
• compositions and methods of the instant invention include foodstuffs such as fruit juices, soft drinks, beer, wines, food products and dairy products, and personal care products, cosmetics, shampoos, vitamins, pharmaceuticals, inks, dyes and pigments.
• the plastic containers and films are rigid or flexible mono- and/or multi-layered packaging materials.
• the containers and films may be formed from polyesters, polyolefins, polyolefin copolymers such as ethylene-vinyl acetate, polystyrene, poly(vinyl chloride), poly(vinylidene chloride), polyamides, cellulosics, polycarbonates, ethylene-vinyl alcohol, poly(vinyl alcohol), styrene-acrylonitrile and ionomers and mixtures or multi-layers of these polymers.
• Typical multi-layer constructions have two or more layer laminates, manufactured either by thermoforming, or extrusion of multi-layer flexible films, or extrusion of bottle "preforms” or "parissons” followed by subsequent blow molding of the preforms into bottles.
• the exterior layer, and innermost layer contacting the contents are composed of polyesters such as PET or PEN [poly(ethylene naphthalate)], polypropylene, or polyethylene such as HDPE.
• the middle layers are composed of one or more combinations of either PET, PEN, carboxylated polyethylene ionomer such as Surlyn ® , vinyl alcohol homopolymers or copolymers such as poly(vinyl alcohol), partially hydrolyzed poly(vinyl acetate), poly(ethylene-co-vinyl alcohol) such as EVOH or EVAL, nylons or polyamides such as Selar ® (DuPont) or polyamides based on metaxylenediamine (sometimes called nylon MXD-6), or polyvinylidene chloride (PVDC), or polyurethanes.
• PET PET
• PEN carboxylated polyethylene ionomer
• vinyl alcohol homopolymers or copolymers such as poly(vinyl alcohol), partially hydrolyzed poly(vinyl acetate), poly(ethylene-co-vinyl alcohol) such as EVOH or EVAL
• nylons or polyamides such as Selar ® (DuPont) or polyamides based on metax
• the stabilizers of component (b) and optional further additives can be incorporated into coatings which are applied to the outer surface of e.g.' rigid containers.
• coatings include PVDC, or epoxies (such as Bairocace ® technology and polyolefins used as "shrink wrap.”
• the containers and films are primarily polyesters such as poly(ethylene terephthalate) (PET) and polyolefins such as polyethylene or polypropylene. Preferably they comprise PET or HDPE. Where the packaging material is a multi-layer system, layers of any suitable plastic may be employed.
• the polyesters which may be used in the compositions of this invention include linear, thermoplastic, crystalline or amorphous polyesters produced by conventional polymerization techniques from one or more diols and one or more dicarboxyiic acids.
• the polyesters normally are molding grade and have an inherent viscosity (IN.) of about 0.4 to about 1.2.
• the preferred polyesters comprise at least about 50 mole percent terephthalic acid residues and at least about 50 mole percent ethylene glycol and/or 1 ,4- cyclohexanedimethanol residues.
• Particularly preferred polyesters are those containing from about 75 to 100 mole percent terephthalic acid residues and from about 75 to 100 mole percent ethylene glycol residues.
• the diol components of the described polyesters may be selected from ethylene glycol, 1 ,4-cyclohexanedimethanol, 1 ,2-propanediol, 1 ,3-propanediol, 1 ,4-butanediol, 2,2- dimethyl-1 ,3-propanediol, 1,6-hexanediol, 1 ,2-cyclohexane ' diol, 1 ,4-cyclohexanediol, 1 ,2- cyclohexanedimethanol, 1 ,3-cyclohexanedimethanol, X,8-bis(hydroxymethyl)-tricyclo- [5.2.1.0]-decane wherein X represents 3, 4, or 5; and diols containing one or more oxygen atoms in the chain e.g., diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol and the like. In general, these diol
• the acid components (aliphatic, alicyclic, or aromatic dicarboxyiic acids) of the linear polyester are selected, for example, from terephthalic acid, isophthalic acid, 1 ,4- cyclohexanedicarboxylic acid, 1 ,3-cyclohexanedicarboxylic acid, succinic acid, glutaric acid, adipic acid, sebacic acid, 1 ,12-dodecanedioic acid, 2,6-naphthalene-dicarboxylic acid and the like.
• a functional acid derivative thereof such as the dimethyl, diethyl, or dipropyl ester of the dicarboxyiic acid.
• the anhydrides or acid halides of these acids also may be employed where practical.
• the linear polyesters may be prepared according to procedures well known in the art. For example, a mixture of one or more dicarboxyiic acids, preferably aromatic dicarboxyiic acids, or ester forming derivatives thereof, and one or more diols may be heated in the presence of esterification and/or poly-esterification catalysts at temperatures in the range of 150° to 300°C and pressures of atmospheric to 0.2 mm Hg. Normally, the dicarboxyiic acid or derivative thereof is esterified or transesterified with the diol(s) at atmospheric pressure and at a temperature at the lower end of the specified range. Polycondensation then is effected by increasing the temperature and lowering the pressure while excess diol is removed from the mixture. Solid state polymerization may be employed to achieve final polymer I.V. in a useful range for films and molded containers.
• novel polyester compositions provided by this invention are useful in the manufacture of containers or packages for comestibles such as beverages and food.
• certain of the polyesters are, in terms of color, I.V. and heat distortion, stable at temperatures up to about 100°C. Such stability characteristics are referred to herein as "hot-fill" stability.
• Hot-fill stability characteristics.
• Articles molded from these polyesters exhibit good thin-wall rigidity, excellent clarity and good barrier properties with respect to moisture and atmospheric gases, particularly carbon dioxide and oxygen.
• Rigid containers may be manufactured by known mechanical processes:
• the pre-forms may be mono-layer or multi-layer in construction.
• the bottles may optionally be post-treated to alter the inner wall properties. Bottles may optionally be surface treated on the exterior such as by application of surface coatings. UV absorbers and other known stabilizers may be present in such added surface coatings.
• the linear polyesters most preferred for use in articles having "hot-fill” stability comprise poly(ethylene terephthalate), poly(ethylene terephthalate) wherein up to 5 mole percent of the ethylene glycol residues have been replaced with residues derived from 1 ,4- cyclohexanedimethanol and poly(ethylene 2,6-naphthalenedicarboxylate), wherein the polyesters have been sufficiently heat set and oriented by methods well known in the art to give a desired degree of crystallinity.
• a polymer is "hot-fill” stable at a prescribed temperature when less than 2% change in volume of a container manufactured therefrom occurs upon filling the same with a liquid at the temperature.
• the most preferred polyesters have an I.V. of 0.65 to 0.85, and a Tg of >70°C, and film sections cut from the bottle have a Water Vapor Transmission Rate of 1.5 to 2.5 g mils/100 in. 2 -24 hours, a Carbon Dioxide Permeability of 20 to 30 cc. mils/100 in. 2 -24 hours -atm., and an Oxygen Permeability of 4 to 8 cc. mils/100 in. 2 -24 hours -atm.
• the Tg is determined by Differential Scanning Calorimetry at a scan rate of 20 Centigrade Degrees/min., the Oxygen Permeability by the standard operating procedure of a MOCON OXTRAN 100 instrument of Modern Controls, Inc., of Elk Riber, Minnesota, and the Carbon Dioxide Permeability by the standard operating procedure of a MOCON PERMATRAN C II, also of Modern Controls.
• polystyrene resins examples are:
• Polymers of monoolefins and diolefins for example polypropylene, polyisobutylene, polybut-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 molecular weight polyethylene (HDPE-HMW), high density and ultrahigh molecular weight polyethylene (HDPE-UHMW), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), (VLDPE) and (ULDPE).
• HDPE high density polyethylene
• HDPE-HMW high density and high molecular weight polyethylene
• HDPE-UHMW high density and ultrahigh molecular weight polyethylene
• MDPE medium density polyethylene
• LDPE low density polyethylene
• LLDPE linear low density poly
• Polyolefins i.e. the polymers of monoolefins exemplified in the preceding paragraph, preferably polyethylene and polypropylene, can be prepared by different, and especially by the following, methods:
• a catalyst that normally contains one or more than one metal of groups IVb, Vb, Vlb or VIII of the Periodic Table.
• These metals usually have one or more than one ligand, typically oxides, halides, alcoholates, esters, ethers, amines, alkyls, alkenyls and/or aryls that may be either p- or s-coordinated.
• These metal complexes may be in the free form or fixed on substrates, typically on activated magnesium chloride, titanium(lll) 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 Ilia 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).
• 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 copolymers, ethylene/methylpentene copolymers, ethylene/heptene copolymers, ethylene/octene copolymers, propylene/butadiene copolymers, isobutylene/isoprene copolymers, ethylene/alkyl acrylate copolymers, ethylene/alkyl methacrylate copolymers, ethylene/vinyl acetate copolymers and their copolymers with carbon monoxide or ethylene/acrylic acid copolymers and their salts (iono
• Preferred polyolefins are polyethylene or polypropylene and their copolymers with mono- and diolefins.
• benzotriazoles of the methods of the instant invention are of formula (I), (II) or (III)
• G-, and d' are independently hydrogen or halogen
• G 2 and G 2 ' are independently halogen, nitro, cyano, perfluoroalkyl of 1 to 12 carbon atoms, -COOG3, -P(O)(C 6 H 5 ) 2 , -CO-G 3 , -CO-NH-G 3 , -CO-N(G 3 ) 2 , -N(G 3 )-CO-G 3 , E 3 SO- or E 3 SO 2 -; or G 2 ' is also hydrogen,
• G 3 is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms,
• E- is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms; or E-i is alkyl of 1 to 24 carbon atoms substituted by one or two hydroxy groups, when Ei is phenylalkyl of 7 to 15 carbon atoms or phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms, G 2 may also be hydrogen,
• E 2 and E 2 ' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by one to three alkyl of 1 to 4 carbon atoms; or E 2 and E 2 ' are independently said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOEn, -OE 4 , -NCO, -NH 2 , -NHCOEn, -NHE 4 or - N(E 4 ) 2 , or mixtures thereof, where E 4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted
• n 1 or 2
• E 5 is OE 6 or NE 7 E 8 , or
• E 5 is -PO(OE 12 ) 2 , -OSi(En) 3 or -OCO-En, or straight or branched chain C C 24 alkyl which is interrupted by -O-, -S- or -NE ⁇ and which can be unsubstituted or substituted by -OH or -OCO-En, C 5 -C 12 cycloalkyl which is unsubstituted or substituted by -OH, straight chain or branched C 2 -C 18 alkenyl which is unsubstituted or substituted by -OH, C 7 -C 15 aralkyl, -CH 2 -CHOH-E 13 or glycidyl,
• E 6 is hydrogen, straight or branched chain C C 24 alkyl which is unsubstituted or substituted by one or more OH, OE 4 or NH 2 groups, or -OE 6 is -(OCH 2 CH 2 ) w OH or - (OCH 2 CH 2 ) w OE ⁇ where w is 1 to 12 and E 2 ⁇ is alkyl of 1 to 12 carbon atoms,
• E 7 and E 8 are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C 3 -C 18 alkyl which is interrupted by -O-, -S- or -NEn-, C 5 -C 12 cycloalkyl, C 6 - C 14 aryl or C C 3 hydroxylalkyl, or E 7 and E 8 together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring,
• E s is -X-(Z) p -Y-E 15 wherein
• X is -O- or -N(E 16 )-
• Y is -O- or -N(E 17 )-
• Z is C 2 -C 12 -alkylene, C 4 -C ⁇ 2 -alkylene interrupted by one to three nitrogen atoms, oxygen atoms or a mixture thereof, or is C 3 -C 12 -alkylene, butenylene, butynylene, cyclohexylene or phenylene, each substituted by a hydroxyl group, m is zero, 1 or 2, p is 1 , or p is also zero when X and Y are -N(E 16 )- and -N(E 17 )-, respectively,
• E ⁇ G 2 , X, Z, m and p have the meanings defined above, and E 16 and E 17 independently of one another are hydrogen, CrC ⁇ 2 -alkyl, C 3 -C ⁇ 2 -alkyl interrupted by 1 to 3 oxygen atoms, or is cyclohexyl or C 7 -C 15 aralkyl, and E 16 together with E 17 in the case where Z is ethylene, also forms ethylene,
• G 2 when n is 2, one of G 2 is also hydrogen, E 5 is one of divalent radicals -O-E 9 -O- or - N(E 11 )-E 10 -N(E 11 )- ,
• E 9 is C 2 -C 8 alkylene, C 4 -C 8 alkenylene, C 4 alkynylene, cyclohexylene, straight or branched chain C 4 -C ⁇ 0 alkylene which is interrupted by -O- or by -CH 2 -CHOH-CH 2 -O-E 14 -O- CH 2 -CHOH-CH 2 -,
• E 10 being straight or branched chain C 2 -C 12 alkylene which may be interrupted by -O-, cyclohexylene, or or
• E 14 is straight or branched chain C 2 -C 8 alkylene, straight or branched chain C 4 - C ⁇ 0 alkylene which is interrupted by -O-, cycloalkylene, arylene or
• E 7 and E 8 are independently hydrogen, alkyl of 1 to 18 carbon atoms or E 7 and E 8 together are alkylene of 4 to 6 carbon atoms, 3-oxapentamethylene, 3-iminopentamethylene or 3-methyliminopentamethylene,
• En is hydrogen, straight or branched chain d-C ⁇ 8 alkyl, C 5 -C 12 cycloafkyl, straight or branched chain C 2 -C 18 alkenyl, C 6 -C- ⁇ 4 aryl or C 7 -C 5 aralkyl,
• E 12 is straight or branched chain C- ⁇ -C ⁇ 8 alkyl, straight or branched chain C 3 - C 18 alkenyl, C 5 -C 10 cycloalkyl, C 6 -C 16 aryl or C 7 -C 15 aralkyl,
• E 13 is H, straight chain or branched C C 18 alkyl which is substituted by -PO(OE 12 ) 2 , phenyl which is unsubstituted or substituted by OH, C 7 -C 15 aralkyl or -CH 2 OE 12
• E 3 is alkyl of 1 to 20 carbon atoms, hydroxyalkyl of 2 to 20 carbon atoms, alkyl substituted by alkoxycarbonyl of 2 to 9 carbon atoms, alkenyl of 3 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or said aryl substituted by one or two alkyl of 1 to 4 carbon atoms or 1 ,1,2,2- tetrahydroperfluoroalkyl where the perfluoroalkyl moiety is of 6 to 16 carbon atoms, and
• L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, a,a,a',a'-tetramethyl-m-xylylene or cycloalkylidene;
• formula (I) does not represent 5-chloro-2-(2-hydroxy-3,5-di-tert- butylphenyl)-2H-benzotriazole, 5-chloro-2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H- benzotriazole or 2-(2-hydroxy-3,5-di- ⁇ -cumyl)-2H-benzotriazole.
• alkyl radicals in the various substituents may be linear or branched.
• alkyl containing 1 to 24 carbon atoms are methyl, ethyl, propyl, isopropyl, butyl, 2-butyl, isobutyl, t- butyl, pentyl, 2-pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, t-octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, hexadecyl and octadecyl.
• alkenyl radicals in the various substituents may be linear or branched.
• Examples of C 2 - C 18 alkenyl are vinyl, allyl, 2-methylallyl, butenyl, hexenyl, undecenyl and octadecenyl.
• C 7 -Cgphenylalkyl is for example benzyl, phenylpropyl, ⁇ , ⁇ -dimethylbenzyl or ⁇ -methylbenzyl.
• Cg-Cnphenylalkyl is for example ⁇ , ⁇ -dimethylbenzyl, ⁇ , ⁇ -metylethylbenzyl or ⁇ , ⁇ - diethylbenzyl.
• C 5 -C ⁇ 2 cycloalkyl is typically cyclopentyl, methylcyclopentyl, dimethylcyclopentyl, cyclohexyl, methylcyclohexyl.
• Alkyl substituted by-OH is typically 2-hydroxyethyl, 2-hydroxypropyl or 2-hydroxybutyl.
• C C 24 alkyl substituted by C C 8 alkoxy, preferably by C C alkoxy, in particular by methoxy or ethoxy, is typically 2-methoxyethyl, 2-ethoxyethyl, 3-methoxy propyl, 3-ethoxypropyl, 3- butoxypropyl, 3-octoxypropyl and 4-methoxybutyl.
• CrC ⁇ Alkoxy and, preferably C C 4 alkoxy are typically methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, pentoxy, isopentoxy, hexoxy, heptoxy or octoxy.
• C 2 -C 18 alkylene bridges interrupted by at least one N or O atom are, for example, -CH 2 -O-CH 2 -CH 2 , -CH 2 -O-CH 2 -CH 2 -CH 2 , -CH 2 -O-CH 2 -CH 2 -CH 2 -CH2-, -CH 2 -O-CH 2 -CH 2 -O-CH2-, -CH 2 -NH-CH 2 -CH 2 , -CH 2 -NH-CH 2 -CH 2 -CH 2 -CH 2 -, -CH 2 -NH-CH 2 -CH 2 -CH 2 -CH 2 -, -CH 2 -NH-CH 2 -CH 2 -NH-CH2- or -CH 2 -NH-CH 2 -CH 2 -O-CH2-.
• C 6 -C 14 aryl is preferably phenyl or naphthyl.
• C 7 -C 15 aralkyl is preferably C 7 -C 15 phenylalkyl.
• G 2 is hydrogen, cyano, chloro, fluoro, CF 3 -, -CO-G 3 , E 3 SO- or E 3 SO 2 -,
• G 3 is straight or branched chain alkyl of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms,
• Ei is phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms,
• E 2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E 2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOEn, -OE 4 , -NCO, -NH 2 , - NHCOE- ⁇ , -NHE or -N(E 4 ) 2 , or mixtures thereof, where E 4 is straight or branched chain alkyl of 1 to 24 carbon atoms; or said alkyl or said alkenyl interrupted by one or more -O-, -
• E 3 is alkyl of 1 to 20 carbon atoms, hydroxyalkyl of 2 to 20 carbon atoms, alkenyl of 3 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or said aryl substituted by one or two alkyl of 1 to 4 carbon atoms or 1 ,1,2,2-tetrahydroperfluoroalkyl where the perfluoroalkyl moiety is of 6 to 16 carbon atoms;
• G-i is hydrogen
• G 2 is chloro, fluoro, CF 3 -, E 3 SO- or E 3 SO 2 -,
• Ei is hydrogen or straight or branched alkyl of 1 to 24 carbon atoms
• E 3 is straight or branched chain alkyl of 1 to 7 carbon atoms.
• formula (I) does not represent 5-chloro-2-(2-hydroxy-3,5-di-tert- butylphenyl)-2H-benzotriazole, 5-chloro-2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H- benzotriazole or 2-(2-hydroxy-3,5-di- ⁇ -cumyl)-2H-benzotriazole.
• benzotriazole is of formula (HA) wherein
• G 2 is CF 3 - or fluoro
• E-i is hydrogen, straight or branched alkyl of 1 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms,
• G 2 may also be hydrogen
• E 5 is -OE 6 or -NE 7 E 8 , or
• X is -O- or -N(E 16 )-
• Y is -O- or -N(E 17 )-
• Still another preferred embodiment is a benzotriazole of formula (I MA.)
• G 2 is CF 3 ,
• G 2 - is hydrogen or CF 3 ,
• E 2 and E 2 ' are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and
• L is alkylene of 1 to 12 carbon atoms, alkylidene of 2 to 12 carbon atoms, benzylidene, p-xylylene, a,a,a',a'-tetramethyl-m-xylylene or cycloalkylidene.
• the benzotriazole is of formula (I) wherein
• G 2 is CF 3 -
• Ei is phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 4 alkyl of 1 to 4 carbon atoms,
• E 2 is straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; or E 2 is said alkyl of 1 to 24 carbon atoms or said alkenyl of 2 to 18 carbon atoms substituted by one or more -OH, -OCOEn, -NH 2 or -NHCOEn, or mixtures thereof, or said alkyl or said alkenyl interrupted by one or more -O- and which can be unsubstituted or substituted by one or more -OH,
• G 2 is CF 3" i
• E T is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms, and
• E 2 is as defined above.
• the benzotriazole is of formula (MA)
• G-i is hydrogen
• G 2 is CFr
• Ei is hydrogen, straight or branched alkyl of 4 to 24 carbon atoms or phenylalkyl of 7 to 15 carbon atoms,
• E 5 is -OE 6 or -NE 7 E 8 where
• E 6 is hydrogen, straight or branched chain C C 24 alkyl which is unsubstituted or substituted by one or more OH groups, or -OE 6 is -(OCH 2 CH 2 ) w OH or - (OCH 2 CH 2 ) w OE 2 ⁇ where w is 1 to 12 and E 21 is alkyl of 1 to 12 carbon atoms, and
• E 7 and E 8 are independently hydrogen, alkyl of 1 to 18 carbon atoms, straight or branched chain C 3 -C 18 alkyl which is interrupted by -O-, -S- or -NEn-, C 5 -C 12 cycloalkyl, C 6 - C 14 aryl or C C 3 hydroxylalkyi, or E 7 and E 8 together with the N atom are a pyrrolidine, piperidine, piperazine or morpholine ring.
• the benzotriazole is of formula (IMA) wherein
• G 2 is CF 3 ,
• G 2 ' is hydrogen or CF 3 ,
• E 2 and E 2 are independently straight or branched alkyl chain of 1 to 24 carbon atoms, straight or branched chain alkenyl of 2 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, phenyl, or said phenyl or said phenylalkyl substituted on the phenyl ring by 1 to 3 alkyl of 1 to 4 carbon atoms; and
• L is methylene
• the benzotriazole is a compound which is
• the durable tris-aryl-s-triazines of the instant invention are typical commercial s- triazine UV absorbers based on 4,6-bis-(2,4-dimethylphenyl)-2-(2,4-dihydroxyphenyl)-s- triazine such as Tinuvin ® 400, Ciba Specialty Chemicals Corp., and Cyasorb ® 1 164, Cytec Corporation, or they are red-shifted s-triazines as disclosed for example in U.S. Patent Nos. 5,556,973 and 5,354,794, or they are high molar extinction s-triazines as disclosed in copending Application Serial No. 09/383,163.
• the s-triazine UV absorbers of component (b) are of formula (IV), (V), (VI), (VII), (VIII) or (IX)
• X and Y are independently phenyl, naphthyl, or said phenyl or said naphthyl substituted by one to three alkyl of 1 to 6 carbon atoms, by halogen, by hydroxy or by alkoxy of 1 to 6 carbon atoms or by mixtures thereof; or X and Y are independently Z ⁇ or Z 2 ;
• R t is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, halogen, -SR 3 , -SOR 3 or -SO 2 R 3 ; or said alkyl, said cycloalkyl or said phenylalkyl substituted by one to three halogen, -R 4 , - OR 5 ,
• R 3 is alkyl of 1 to 20 carbon atoms, alkenyl of 3 to 18 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, aryl of 6 to 10 carbon atoms or said aryl substituted by one or two alkyl of 1 to 4 carbon atoms;
• R 4 is aryl of 6 to 10 carbon atoms or said aryl substituted by one to three halogen, alkyl of 1 to 8 carbon atoms, alkoxy of 1 to 8 carbon atoms or combinations thereof; cycloalkyl of 5 to 12 carbon atoms; phenylalkyl of 7 to 15 carbon atoms or said phenylalkyl substituted on the phenyl ring by one to three halogen, alkyl of 1 to 8 carbon atoms, alkoxy of 1 to 8 carbon atoms or combinations thereof; or straight or branched chain alkenyl of 2 to 18 carbon atoms;
• R 5 is defined as is R 4 ; or R 5 is also hydrogen or straight or branched chain alkyl of 1 to 24 carbon atoms, alkenyl of 2 to 24 carbon atoms; or R 5 is a group for formula
• T is hydrogen, oxyl, hydroxyl, -OT t , alkyl of 1 to 24 carbon atoms, said alkyl substituted by one to three hydroxy; benzyl or alkanoyl of 2 to 18 carbon atoms;
• Ti is alkyl of 1 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, alkenyl of 2 to 24 carbon atoms, cycloalkenyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, a radical of a saturated or unsaturated bicyclic or tricyclic hydrocarbon of 7 to 12 carbon atoms or aryl of 6 o 10 carbon atoms or said aryl substituted by one to three alkyl of 1 to 4 carbon atoms;
• R 6 is straight or branched chain alkyl of 1 to 18 carbon atoms, straight or branched chain alkenyl of 2 to 12 carbon atoms, phenoxy, alkylamino of 1 to 12 carbon atoms, arylamino of 6 to 12 carbon atoms, -R 7 COOH or -NH-R 8 -NCO;
• R is alkylene of 2 to 14 carbon atoms or phenylene
• R 8 is alkylene of 2 to 24 carbon atoms, phenylene, tolylene, diphenylmethane or a group
• R and RV are the same or different and are as defined for R ⁇ ;
• R 2 ' and R 2 " are the same or different and are as defined for R 2 ;
• X, X', Y and Y' are the same or different and are as defined for X and Y;
• t 0 to 9;
• L is straight or branched alkylene of 1 to 12 carbon atoms, cycloalkylene of 5 to 12 carbon atoms or alkylene substituted or interrupted by cyclohexylene or phenylene; or L is benzylidene; or L is -S-, -S-S-, -S-E-S-, -SO-, -SO 2 -, -SO-E-SO-, -SO 2 -E-SO 2 -, -CH 2 -NH-E- NH-CH 2 - or
• E is alkylene of 2 to 12 carbon atoms, cycloalkylene of 5 to 12 carbon atoms or alkylene interrupted or terminated by cycloalkylene of 5 to 12 carbon atoms;
• n 2, 3 or 4;
• Q is straight or branched alkylene of 2 to 16 carbon atoms; or said alkylene substituted by one to three hydroxy groups; or said alkylene interrupted by one to three
• -CH CH- or -O-; or said alkylene both substituted and interrupted by combinations of the groups mentioned above; or Q is xylylene or a group -CONH-R 8 -NHCO-, -CH 2 CH(OH)CH 2 O- R 9 -OCH 2 CH(OH)CH 2 -, -CO-R 10 -CO-, or -(CHjdm-COO-Rn-OOCKCHa)*-, where m is 1 to 3; or Q is
• R 9 is alkylene of 2 to 50 carbon atoms; or said alkylene interrupted by one to ten -O-, phenylene or a group -phenylene-G-phenylene in which G is -O-, -S-, -SO 2 -, -CH 2 - or -C(CH 3 ) 2 -;
• Rio ' is alkylene of 2 to 10 carbon atoms, or said alkylene interrupted by one to four -O-
• R 10 is arylene of 6 to 12 carbon atoms; - R- ⁇ is alkylene of 2 to 20 carbon atoms or said alkylene interrupted by one to eight -
• Q is a group -[(CH 2 ) m COO] 3 -R ⁇ 2 where m is 1 to 3, and R 12 is an alkanetriyl of 3 to 12 carbon atoms;
• Q is a group -[(CH 2 ) m COO] 4 -R 13 where m is 1 to 3, and R 14 is an alkanetetrayl of 4 to 12 carbon atoms;
• . 1 is a group of formula
• Z 2 is a group of formula
• r ⁇ and r 2 are independently of each other 0 or 1 ;
• Ri4, Ri5, Ri6, Ri 7 , Ri8, ig, R 2 o, R 2 ⁇ , R22 and R 23 are independently of one another hydrogen, hydroxy, cyano, alkyl of 1 to 20 carbon atoms, alkoxy of 1 to 20 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, cycloalkoxy of 5 to 12 carbon atoms, halogen, haloalkyl of 1 to 5 carbon atoms, sulfo, carboxy, acylamino of 2 to 12 carbon atoms, acyloxy of 2 to 12 carbon atoms, alkoxycarbonyl of 2 to 12 carbon atoms or aminocarbonyl; or R 17 and R 18 or R 22 and R 23 together with the phenyl radical to which they are attached are a cyclic radical interrupted by one to three -O- or -NR 5 -;
• the invention pertains to compounds of formula (IV) where X and Y are the same or different and are phenyl or said phenyl substituted by one to three alkyl of 1 to 6 carbon atoms, halogen, hydroxy or alkoxy of 1 to 12 carbon atoms; or X and Y are Z 1 or Z 2 ;
• R T is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, phenylalkyl of 7 to 15 carbon atoms or halogen;
• R 2 is hydrogen, straight or branched chain alkyl of 1 to 24 carbon atoms or cycloalkyl of 5 to 12 carbon atoms; or said alkyl or said cycloalkyl substituted by one to three -R , -OR 5 , -COOR 5 , -OCOR 5 or combinations thereof; or said alkyl or cycloalkyl interrupted by one to three epoxy, -O-, -COO-, -OCO- or -CO-;
• R 4 is aryl of 6 to 10 carbon atoms or said aryl substituted by one to three halogen, alkyl of 1 to 8 carbon atoms, alkoxy of 1 to 8 carbon atoms or combinations thereof; cycloalkyl of 5 to 12 carbon atoms; phenylalkyl of 7 to 15 carbon atoms or said phenylalkyl substituted on the phenyl ring by one to three halogen, alkyl of 1 to 8 carbon atoms, alkoxy of 1 to 8 carbon atoms or combinations thereof;
• R 5 is defined as is R 4 ; or R 5 is also hydrogen or straight or branched chain alkyl of 1 to 24 carbon atoms;
• Z 1 is a group of formula
• Z 2 is a group of formula
• R 4 , R 15 , R 16 , R 7 , R 18 , R-ig, R 2 o, R 21 , R 22 and R 23 are independently of one another hydrogen, hydroxy, cyano, alkyl of 1 to 20 carbon atoms, alkoxy of 1 to 20 carbon atoms, phenylalkyl of 7 to 15 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, cycloalkoxy of 5 to 12 carbon atoms, halogen, haloalkyl of 1 to 5 carbon atoms, sulfo, carboxy, acylamino of 2 to 12 carbon atoms, acyloxy of 2 to 12 carbon atoms, or alkoxycarbonyl of 2 to 12 carbon atoms or aminocarbonyl;
• the s-triazine UV absorber is also of formula (V) where
• X is phenyl, naphthyl or said phenyl or said naphthyl substituted by one to three alkyl of 1 to 6 carbon atoms, by halogen, by hydroxy or by alkoxy of 1 to 6 carbon atoms or by mixtures thereof; or X is Z .
• the s-triazine UV absorber is also of formula (VI).
• the s-triazine UV absorber is also of formula (IX) where
• X and Y are independently phenyl or said phenyl substituted by one to three alkyl of 1 to 6 carbon atoms, by halogen, by hydroxy or by alkoxy of 1 to 6 carbon atoms or by mixtures thereof; or X and Y are independently Z-i or Z 2 ; and
• L is straight or branched alkylene of 1 to 12 carbon atoms, cycloalkylene of 5 to 12 carbon atoms or alkylene substituted or interrupted by cyclohexylene or phenylene.
• the instant s-triazine UV absorber is of formula (IV) where X and Y are the same or different and are phenyl or said phenyl substituted by one to three alkyl of 1 to 6 carbon atoms; Z-i or Z 2 ;
• R- is hydrogen or phenylalkyl of 7 to 15 carbon atoms
• R 2 is hydrogen, straight or branched chain alkyl of 1 to 18 carbon atoms; or said alkyl substituted by one to three -R 4 , -OR 5 or mixtures thereof; or said alkyl interrupted by one to eight -O- or -COO-;
• R 4 is aryl of 6 to 10 carbon atoms
• R 5 is hydrogen
• Z 2 is a group of formula where n and r 2 are each 1 ;
• Ri4, Ris, Ri6, i7, Ris, Ri9, R 2 o, R 2 1, 22 and R 23 are each hydrogen; with the proviso that the compound of formula (IV) is not 4,6-diphenyl-2-(4-hexyloxy- 2-hydroxyphenyl)-s-triazine.
• the s-triazine UV absorber of this invention is a compound which is
• the s-triazine UV absorber of component (b) is
• the effective stabilizing amount of the compound or compounds of component (b) is preferably from 0.1 to 20% by weight based on the weight of the plastic container or film composition.
• a preferred embodiment of the present invention are where mixtures of stabilizers of component (b) are employed, for example a mixture of at least one benzotriazole and at least one s-triazine or a mixture of two or more benzotriazoles or two or more s-triazines.
• the UV absorbers of component (b) are all highly durable, but have different UV light absorbing characteristics depending on their substitution pattern. By selection of particular combinations of UV absorbers, one may optimize the UV absorbing characteristics and the color of the compositions of this invention.
• Another preferred embodiment of the present invention is where a benzotriazole UV absorber not of the class described herein is employed in addition to the compound or compounds of component (b).
• a plastic container or film which additionally comprises at least one UV absorber selected from the group consisting of 2-(2-hydroxy-3,5-di- ⁇ -cumyl)- 2H-benzotriazole, 5-chloro-2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H-benzotriazole, 5- chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole and 4,6-diphenyl-2-(4- hexyloxy-2-hydroxyphenyl)-s-triazine.
• UV absorber selected from the group consisting of 2-(2-hydroxy-3,5-di- ⁇ -cumyl)- 2H-benzotriazole, 5-chloro-2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H-benzotriazole, 5- chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole
• Preferred is a plastic container or film in which said contents are selected from the group consisting of fruit juices, soft drinks, beer, wines, meats, vegetables, food products, dairy products, personal care products, cosmetics, shampoos, vitamins, pharmaceuticals, inks, dyes and pigments.
• polyesters polyolefins, polyolefin copolymers, ethylene-vinyl acetate, polystyrene, poly(vinyl chloride
• the instant plastic container or film stabilized by a compound or compounds of component (b) may also optionally contain from about 0.01 to about 10% by weight; preferably from about 0.025 to about 5% by weight, and most preferably from about 0.1 to about 3% by weight of additional coadditives such as antioxidants, other UV absorbers, hindered amines, phosphites or phosphonites, hydroxylamines, nitrones, benzofuran-2-ones, thiosynergists, polyamide stabilizers, metal stearates, nucleating agents, fillers, reinforcing agents, lubricants, emulsifiers, dyes, pigments, optical brighteners, flame retardants, antistatic agents, blowing agents and the like.
• additional coadditives such as antioxidants, other UV absorbers, hindered amines, phosphites or phosphonites, hydroxylamines, nitrones, benzofuran-2-ones, thiosynergists,
• a plastic container or film 1 which additionally comprises at least one coadditive selected from the group consisting of antioxidants, other UV absorbers, hindered amines, phosphites or phosphonites, hydroxylamines, nitrones, benzofuran-2-ones, thiosynergists, polyamide stabilizers, metal stearates, nucleating agents, fillers, reinforcing agents, lubricants, emulsifiers, dyes, pigments, optical brighteners, flame retardants, antistatic agents and blowing agents.
• coadditive selected from the group consisting of antioxidants, other UV absorbers, hindered amines, phosphites or phosphonites, hydroxylamines, nitrones, benzofuran-2-ones, thiosynergists, polyamide stabilizers, metal stearates, nucleating agents, fillers, reinforcing agents, lubricants, emulsifiers, dyes, pigments,
• the stabilizers of the instant invention may readily be incorporated into the present container or film compositions by conventional techniques, at any convenient stage prior to the manufacture of articles therefrom.
• the stabilizer may be mixed with the polymer in dry powder form, or a suspension or emulsion of the stabilizer may be mixed with a solution, suspension, or emulsion of the polymer.
• the resulting stabilized compositions of the invention may optionally also contain from about 0.01 to about 10%, preferably from about 0.025 to about 5%, and especially from about 0.1 to about 3% by weight of various conventional stabilizer coadditives, such as the materials listed below, or mixtures thereof.
• Alkylated monophenols for example.
• esters of b-(3,5-di-tert-butyl-4-hvdroxyphenvD-propionic acid with monohydric or polyhydric alcohols for example,
• esters of b-(5-tert-butyl-4-hvdroxy-3-methylphenyl)-propionic acid with monohydric or polyhydric alcohols for example,
• Esters of optionally substituted benzoic acids for example, phenyl salicylate, 4-tert- butylphenyl salicylate, octylphenyl salicylate, dibenzoylresorcinol, bis-(4-tert-butylbenzoyl)- resorcinol, benzoylresorcinol, 3,5-di-tert-butyl-4-hydroxybenzoic acid 2,4-di-tert-butylphenyl ester and 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyi ester.
• benzoylresorcinol 3,5-di-tert-butyl-4-hydroxybenzoic acid 2,4-di-tert-butylphenyl ester and 3,5-di-tert-butyl-4-hydroxybenzoic acid hexadecyi ester.
• Sterically hindered amines for example bis-(2,2,6,6-tetramethylpiperidyl) sebacate, bis- (1 ,2,2,6,6-pentamethylpiperidyl) sebacate, n-butyl-3,5-di-tert.butyl-4-hydroxybenzyl malonic acid bis-(1 ,2,2,6,6-pentanemethylpiperidyl)ester, condensation product of 1-hydroxyethyl- 2,2,6, 6-tetramethyl-4-hydroxypiperidine and succinic acid, condensation product of N,N'- (2,2,6,6-tetramethylpiperidyl)-hexamethylenediamine and 4-tert-octylamino-2,6-dichloro-s- triazine, tris-(2,2,6,6-tetramethylpiperidyl)-nitrilotriacetate, tetrakis-(2,2,6,6-tetramethyl-4- piperidyl) 1 ,2,2,6,
• Sterically hindered amines substituted on the N-atom by a hvdroxy-substituted alkoxy group for example compounds disclosed in copending application Serial No. 09/257,711 , and whose relevant parts are also incorporated herein by reference, such as 1-(2-hydroxy-2- methylpropoxy)-4-octadecanoyloxy-2,2,6,6-tetramethylpiperidine, 1 -(2-hydroxy-2- methylpropoxy)-4-hydroxy-2,2,6,6-tetramethylpiperidine, 1-(2-hydroxy-2-methylpropoxy)-4- oxo-2,2, 6, 6-tetramethylpiperidine, bis(1-(2-hydroxy-2-methylpropoxy)-2,2,6,6-tetramethyl- piperidin-4-yl) sebacate, bis(1-(2-hydroxy-2-methylpropoxy)-2,2,6,6-tetramethylpiperidin-4-yl) adipate, bis(1-(2-hydroxy-2-methylpropoxy)-2,2,
• Oxalic acid diamides for example, 4,4'-di-octyloxy-oxanilide, 2,2'-di-octyloxy-5,5'-di-tert- butyl-oxanilide, 2,2'-di-dodecyloxy-5,5'-di-tert-butyl-oxanilide, 2-ethoxy-2'-ethyl-oxanilide, N,N'-bis (3-dimethylaminopropyl)-oxalamide, 2-ethoxy-5-tert-butyl-2'-ethyloxanilide and its mixture with 2-ethoxy-2'-ethyl-5,4'-di-tert-butyloxanilide and mixtures of ortho- and para- ethoxy- as well as of o- and p-ethoxy-disubstituted oxanilides.
• Hvdroxyphenyl-s-triazines for example 2,6-bis-(2,4-dimethylphenyl)-4-(2-hydroxy-4- octyloxyphenyl)-s-triazine; 2,6-bis-(2,4-dimethylphenyl)-4-(2,4-dihydroxyphenyl)-s-triazine; 2,4-bis(2,4-dihydroxyphenyl)-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy- ethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy-4-(2-hydroxy- ethoxy)phenyl]-6-(2,4-dimethylphenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxyethoxy) ⁇ phenyl]-6-(4-bromoph
• Phosphites and phosphonites for example, triphenyl phosphite, diphenylalkyl phosphites, phenyldialkyl phosphites, tri-(nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phosphite, di-stearyl-pentaerythritol diphosphite, tris-(2,4-di-tert-butylphenyl) phosphite, di- isodecylpentaerythritol diphosphite, di-(2,4,6-tri-tert-butylphenyl)-pentaerythritol diphosphite, di-(2,4-di-tert-butyl-6-methylphenyl)-pentaerythritol diphosphite, di-(2,4-di-tert-butyl-6-
• esters of b-thiodipropionic acid for example the lauryl, stearyl, myristyl or tridecyl esters, mercapto-benzimidazole or the zinc salt of 2-mercaptobenzimidazole, zinc dibutyl-dithiocarbamate, dioctadecyl disulfide, pentaerythritol tetrakis-(b-dodecylmercapto)-propionate.
• esters of b-thiodipropionic acid for example the lauryl, stearyl, myristyl or tridecyl esters
• mercapto-benzimidazole or the zinc salt of 2-mercaptobenzimidazole zinc dibutyl-dithiocarbamate
• dioctadecyl disulfide pentaerythritol tetrakis-(b-dodecylmercapto)-propionat
• Hydroxylamines for example, N,N-dibenzylhydroxylamine, N,N-diethylhydroxylamine, N,N-dioctylhydroxylamine, N,N-dilaurylhydroxylamine, N,N-ditetradecylhydroxylamine, N,N- dihexadecylhydroxylamine, N,N-dioctadecylhydroxylamine, N-hexadecyl-N-octadecyl- hydroxylamine, N-heptadecyl-N-octadecylhydroxylamine, N,N-dialkylhydroxylamine derived from hydrogenated tallow amine. 6.
• Nitrones for example, N-benzyl-alpha-phenyl nitrone, N-ethyl-alpha-methyl nitrone, N- octyl-alpha-heptyl nitrone, N-lauryl-alpha-undecyl nitrone, N-tetradecyl-alpha-tridecyl nitrone, N-hexadecyl-alpha-pentadecyl nitrone, N-octadecyl-alpha-heptadecylnitrone, N-hexadecyl- alpha-heptadecyl nitrone, N-octadecyl-alpha-pentadecyl nitrone, N-heptadecyl-alpha- heptadecyl nitrone, N-octadecyl-alpha-hexadecyl nitrone, N
• Amine oxides for example amine oxide derivatives as disclosed in U.S. Patent Nos. 5,844,029 and 5,880,191 , didecyl methyl amine oxide, tridecyl amine oxide, tridodecyl amine oxide and trihexadecyl amine oxide.
• Polyamide stabilizers for example copper salts in combination with iodides and/or phosphorus compounds and salts of divalent manganese.
• Basic co-stabilizers for example, melamine, polyvinylpyrrolidone, dicyandiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids for example Ca stearate, Zn stearate, Mg stearate, Na ricinoleate and K palmitate, antimony pyrocatecholate or zinc pyrocatecholate.
• Basic co-stabilizers for example, melamine, polyvinylpyrrolidone, dicyandiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids for example Ca stearate, Zn stearate, Mg stearate, Na ricinoleate and K
• Nucleating agents for example, 4-tert-butyl-benzoic acid, adipic acid, diphenylacetic acid.
• Fillers and reinforcing agents for example, calcium carbonate, silicates, glass fibers, asbestos, talc, kaolin, mica, barium sulfate, metal oxides and hydroxides, carbon black, graphite.
• additives for example, plasticizers, lubricants, emulsifiers, pigments, optical brighteners, flameproofing agents, anti-static agents, blowing agents and thiosynergists such as dilauryl thiodipropionate or distearyl thiodipropionate.
• Benzofuranones and indolinones for example those disclosed in US4325863, US4338244 or US5175312, or 3-[4-(2-acetoxyethoxy)phenyl]-5,7-di-tert-butyl-benzofuran-2- one, 5,7-di-tert-butyl-3-[4-(2-stearoyloxyethoxy)phenyl]benzofuran-2-one, 3,3'-bis[5,7-di-tert- butyl-3-(4-[2-hydroxyethoxy]phenyl)benzofuran-2-one], 5,7-di-tert-butyl-3-(4-ethoxyphenyl)- benzofuran-2-one, 3-(4-acetoxy-3,5-dimethylphenyl)-5,7-di-tert-butyl-benzofuran-2-one, 3- (3,5-dimethyl-4-pivaloyloxyphenyl)-5,7,
• the co-stabilizers with the exception of the benzofuranones listed under 13., are added for example in concentrations of about 0.01 to about 10%, relative to the total weight of the material to be stabilized.
• compositions comprise, in addition to components (a) and (b) further additives, in particular phenolic antioxidants, light stabilizers or processing stabilizers.
• Particularly preferred additives are phenolic antioxidants, sterically hindered amines, phosphites and phosphonites, UV absorbers and peroxide-destroying compounds.
• stabilizers which are also particularly preferred are benzofuran- 2-ones, such as described, for example, in US4,325,863, US4,338,244 or US5, 175,312.
• the phenolic antioxidant of particular interest is selected from the group consisting of n-octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, neopentanetetrayl tetrakis(3,5-di-tert- butyl-4-hydroxyhydrocinammate), di-n-octadecyl 3,5-di-tert-butyl-4- hydroxybenzylphosphonate, 1 ,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, thiodiethylene bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), 1 ,3,5-trimethyl-2,4,6-tris(3,5- di-tert-butyl-4-hydroxybenzyl)benzene, 3,6-dioxaoctamethylene bis(3-methyl-5-tert-butyl-4- hydroxyhydr
• a most preferred phenolic antioxidant is neopentanetetrayl tetrakis(3,5-di-tert-butyl-4- hydroxyhydrocinnamate), n-octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, 1 ,3,5-tri- methyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 1 ,3,5-tris(3,5-di-tert-butyl-4- hydroxybenzyl)isocyanurate, 2,6-di-tert-butyl-p-cresol, 2,2'-ethylidene-bis(4,6-di-tert- butylphenol), 2,4-bis(octylthiomethyl)-6-methylphenol or 2,4-bis(octylthiomethyl)-6-tert-butyl- phenol.
• the hindered amine compound of particular interest is selected from the group consisting of bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate, bis(1 ,2,2,6,6-pentamethylpiperidin-4-yl) sebacate, di(1 ,2,2,6,6-pentamethylpiperidin-4-yl) (3,5-di-tert-butyl-4-hydroxybenzyl)butylmalonate, 4-benzoyl-2,2,6,6-tetramethylpiperidine, 4-stearyloxy-2,2,6,6-tetramethylpiperidine, 3-n-octyl- 7,7,9, 9-tetramethyl-1 ,3,8-triaza-spiro[4.5]decane-2,4-dione, tris(2,2,6,6-tetramethylpiperidin-4-yl) nitrilotriacetate,
• a most preferred hindered amine compound is bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate, bis(1 ,2,2,6,6-pentamethylpiperidin-4-yl) sebacate, di(1 ,2,2,6,6- pentamethylpiperidin-4-yl) (3,5-di-tert-butyl-4-hydroxybenzyl)butylmalonate, the polycondensation product of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, the polycondensation product of 2,4-dichloro-6-tert-octylamino-s-triazine and 4,4'-hexamethylenebis(amino-2,2,6,6-tetramethylpiperidine), N,N',N",N'"-tetrakis[(4,6- bis(butyl-(1,2,2,6,6-pentamethylpiperidin-4-yl
• the instant composition can additionally contain another UV absorber selected from the group consisting of benzotriazoles, s-triazines, oxanilides, hydroxybenzophenones, benzoates, a-cyanoacrylates, malonates, salicylates, and benzoxazinones 2,2'-p-phenylene- bis(3,1-benzoxazin-4-one), Cyasorb ® 3638 (CAS# 18600-59-4), Cytec Corp.
• another UV absorber selected from the group consisting of benzotriazoles, s-triazines, oxanilides, hydroxybenzophenones, benzoates, a-cyanoacrylates, malonates, salicylates, and benzoxazinones 2,2'-p-phenylene- bis(3,1-benzoxazin-4-one), Cyasorb ® 3638 (CAS# 18600-59-4), Cytec Corp.
• Tinuvin ® 327 5-chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole,
• Tinuvin ® 928 3- ⁇ -cumyl-2-hydroxy-5-t-octylphenyl-2H-benzotriazole and
• Tinuvin ® 327, Chimassorb ® 81 and Tinuvin ® 928 are available from Ciba Specialty Chemicals.
• Example 1
• PET concentrates (10% by weight) of the UV-absorbers of Table 1 are prepared using Eastapak 9921 W PET, on a 27 mm twin screw extruder at an operating temperature at die of 275°C. The concentrates are letdown with base resin to the final additive loading indicated in Table 1. PET is dried in vacuo for at least 4 hours at 240°F prior to preform molding. Preforms are molded on a unit cavity Arburg press using the minimum injection temperature and back pressure necessary to obtain parts free of haze an crystallinity. Bottle blow molding is conducted using a Sidel SBO 2/3 blow molding machine, using preforms described above. Bottle wall thickness of 0.015-0.016 inches is achieved.
• the molded bottles represent 16-20 oz. water or soda type PET bottles and 200 mL cough syrup type PET bottles.
• Percent Transmission Percent transmission data is obtained for 200 mL cough syrup bottles prepared according to Example 1. Percent transmission is measured for bottles prepared from formulations 1 and 5 and reported in the following table. Wavelength (nm Formulation 1 Formulation 5
• UV absorber (a) of the. present invention Essentially all the damaging UV light is screened with the bottles which have incorporated therein a small amount of UV absorber (a) of the. present invention.
• Samples are exposed under a bank of six (6) cool white fluorescent lamps (40 watts) or under a bank of six (6) UV lamps having a wavelength of 368 nm with the test samples being twelve (12) inches (30.48 cm) below the lamps.
• Dye color fade (or color change) is measured by a Macbeth ColorEye Spectrophotometer with a 6 inch integrating sphere. The conditions are : 10 degree observer; D65 illuminant and 8 degree viewing angle.
• the commercial mouthwash is Listerine ® Tartar Control antiseptic mouthwash, U.S. Pat. No. 5,891 ,422, which contains F & DC Blue #1 (Warner-Lambert Consumer Healthcare).
• the color change of the mouthwash contained in 16 oz. PET bottles prepared according to Example 1 is measured after exposure to fluorescent light. The bottles are filled to % full (500 g of mouthwash) and the lids are securely fastened. The bottles are exposed as above. Delta E is measured for bottles prepared from formulations 1 , 2 and 4.
• the commercial mouthwash is Listerine ® Tartar Control antiseptic mouthwash, U.S. Pat. No. 5,891 ,422, which contains F & DC Blue #1 (Warner-Lambert Consumer Healthcare).
• the color change of the mouthwash contained in 16 oz. PET bottles prepared according to Example 1 is measured after exposure to ultraviolet (UV) light.
• the bottles are filled to % full (500 g of mouthwash) and the lids are securely fastened.
• the bottles are exposed as above. Delta E is measured for bottles prepared from formulations 1 , 2 and 4.
• the commercial dye is Fast Green FCF (C.I. 42053; Food Green 3), purchased from Sigma-Aldrich.
• the color change of the solutions in 16 oz. PET bottles prepared according to Example 1 is measured after exposure to fluorescent light.
• the bottles are filled to 3 ⁇ full with 500 g of a 2 ppm aqueous dye solution and the lids are securely. fastened.
• The. bottles are exposed as above. Delta E is measured for bottles prepared from formulations 1 , 2 and 4.
• the commercial dye is Fast Green FCF (C.I. 42053; Food Green 3), purchased from Sigma-Aldrich.
• the color change of the solutions in 16 oz. PET bottles prepared according to Example 1 is measured after exposure to ultraviolet (UV) light.
• the bottles are filled to % full with 500 g of a 2 ppm aqueous dye solution and the lids are securely fastened.
• the bottles are exposed as above.
• Delta E is measured for bottles prepared from formulations 1 , 2 and 4. Formulation ⁇ E after 4 days
• the commercial shampoo is Suave ® Strawberry Shampoo which contains D&C Orange #4 (C.I. 15510) and D&C Red #33 (C.I. 17200).
• the color change of the shampoo in 16 oz. PET bottles prepared according to Example 1 is measured after exposure to fluorescent light: The bottles are filled to 3 ⁇ full with 500 g of the shampoo and the lids are securely fastened. The bottles are exposed as above. Delta E is measured for bottles prepared from formulations 1 , 2 and 4.
• the commercial shampoo is Suave ® Strawberry Shampoo which contains D&C Orange #4 (Cl. 155 0) and D&C Red #33 (C I. 17200).
• the color change of the shampoo in 16 oz. PET bottles prepared according to Example 1 is measured after exposure to ultraviolet (UV) light.
• the bottles are filled to % full with 500 g of the shampoo and the lids are securely fastened.
• the bottles are exposed as above.
• Delta E is measured for bottles prepared from formulations 1 , 2 and 4.
• the commercial mouthwash is Listerine ® Tartar Control antiseptic mouthwash, U.S. Pat. No. 5,891 ,422, which contains F & DC Blue #1 (Warner-Lambert Consumer Healthcare).
• the color change of the mouthwash contained in 200 mL bottles prepared according to Example 1 is measured after exposure to fluorescent light.
• the bottles are filled to % full (140 g of mouthwash) and the lids are securely fastened.
• the bottles are exposed as above.
• Delta E is measured for bottles prepared from formulations 1 , 2, 3 and 5. Formulation ⁇ E after 3 days
• the commercial mouthwash is Listerine ® Tartar Control antiseptic mouthwash, U.S. Pat. No. 5,891,422, which contains F & DC Blue #1 (Warner-Lambert Consumer Healthcare).
• the color change of the mouthwash contained in 200 mL bottles prepared according to Example 1 is measured after exposure to ultraviolet (UV) light.
• the bottles are filled to % full (140 g of mouthwash) and the lids are securely fastened.
• the bottles are exposed as above.
• Delta E is measured for bottles prepared from formulations 1 , 2, 3 and 5.
• the commercial dye is Erioglaucine (blue dye), purchased from Sigma-Aldrich.
• the color change of the aqueous solution contained in 200 mL bottles prepared according to Example 1 is measured after exposure to ultraviolet (UV) light.
• the bottles are filled to 3 A full with a 2 ppm aqueous dye solution (140 g of solution) and the lids are securely fastened.
• the bottles are exposed as above.
• Delta E is measured for bottles prepared from formulations 1 , 2, 3 and 5.
• the commercial shampoo is Suave ® Strawberry Shampoo which contains D&C Orange #4 (Cl. 15510) and D&C Red #33 (C.I. 17200).
• the color change of the shampoo contained in 200 mL bottles prepared according to Example 1 is measured after exposure to fluorescent light.
• the bottles are filled to 3 ⁇ full with the shampoo (140 g) and the lids are securely fastened.
• the bottles are exposed as above.
• Delta E is measured for bottles prepared from formulations 1 , 2, 3 and 5. Formulation ⁇ E after 4 days
• the commercial shampoo is Suave ® Strawberry Shampoo which contains D&C Orange #4 (Cl. 15510) and D&C Red #33 (Cl. 17200).
• the color change of the shampoo contained in 200 mL bottles prepared according to Example 1 is measured after exposure to ultraviolet (UV) light.
• the bottles are filled to 3 A full with the shampoo (140 g) and the lids are securely fastened.
• the bottles are exposed as above.
• Delta E is measured for bottles prepared from formulations 1 , 2, 3 and 5.
• the commercial dye is Tartrazine (Cl. 19140, Acid Yellow 23), purchased from Sigma-Aldrich.
• the color change of the aqueous solution contained in 200 mL bottles prepared according to Example 1 is measured after exposure to fluorescent light.
• the bottles are filled to 3 ⁇ full with a 3 ppm aqueous dye solution (140 g of solution) and the lids are securely fastened.
• the bottles are exposed as above.
• Delta E is measured for bottles prepared from formulations 1 , 2, 3 and 5.
• the commercial dye is Tartrazine (Cl. 19140, Acid Yellow 23), purchased from Sigma-Aldrich.
• the color change of the aqueous solution contained in 200 mL bottles prepared according to Example 1 is measured after exposure to ultraviolet (UV) light.
• the bottles are filled to 3 ⁇ full with a 3 ppm aqueous dye solution (140 g of solution) and the lids are securely fastened.
• the bottles are exposed as above. Delta E is measured for bottles prepared from formulations 1 , 2, 3 and 5.
• Example 16 To separate poly(ethylene terephthalate), PET, resin formulations are added 0.5 % by weight of each of the following benzotriazole stabilizers:
• Each of the stabilized resin compositions are then blow or injection molded into a PET bottle having incorporated therein each of the UV absorbers.
• the PET bottles are especially effective at protecting the contents therein from UV radiation, allowing a longer shelf life of the product.
• Example 17 To separate poly(ethylene terephthalate), PET, resin formulations are added 0.5 % by weight of each of the following s-triazine stabilizers: (1) 2,4-bis(4-biphenylyl)-6-(2-hydroxy-4-octyloxycarbonylethylideneoxyphenyl)-s- triazine;
• Each of the stabilized resin compositions are then blow or injection molded into a PET bottle having incorporated therein each of the UV absorbers.
• the PET bottles are especially effective at protecting the contents therein from UV radiation, allowing a longer shelf life of the product.
• Example 18 A multi-layer bottle is prepared wherein the exterior layer and the innermost layer contacting the contents are composed of PET and which also comprises a barrier layer.
• the benzotriazole or s-triazines listed in Examples 1 and 2 are incorporated into any of the three layers at 0.5 % by weight based on the weight of the resin, the contents of the bottle are effectively protected from UV radiation.
• Example 19 A multi-layer bottle is prepared wherein the exterior layer and the innermost layer contacting the contents are composed of HDPE and which also comprises a barrier layer.
• the benzotriazole or s-triazines listed in Examples 1 and 2 are incorporated into any of the three layers at 0.5 % by weight based on the weight of the resin, the contents of the bottle are effectively protected from UV radiation.
• Example 20 To separate polypropylene resin formulations are added 0.5 % by weight of each of the benzotriazole and s-triazine stabilizers of Examples 1 and 2. Each of the stabilized resin compositions are then blow or injection molded into a polypropylene bottle having incorporated therein each of the UV absorbers.
• the polypropylene bottles are especially effective at protecting the contents therein from UV radiation, allowing a longer shelf life of the product.

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