Abstract: The present invention relates to the unexpected discovery of novel multi-aromatic, multi-substituted compounds. In certain embodiments, the compounds of the invention are generated by condensing at least two phenolic- and/or aniline-containing monomers and an aromatic, aliphatic or heteroaromatic aldehyde- and/or ketone-containing monomer. In other embodiments, at least one monomer is isolated from a bio-based resource. In yet other embodiments, the compounds of the invention are bis- or poly-phenolic compounds.

Abstract: The present invention relates to a polymer composition containing polycarbonate with a weight-average molecular weight Mw of from 24,000 to 33,000 and 5.0 wt. % to 20.0 wt. % (based on the total amount of the composition) of glass hollow spheres with an alkalinity of less than 1.0 meq/g. The present invention furthermore provides coextruded sheets in which the coextruded layer contains this polymer composition, and shaped articles produced therefrom, in particular containers and pieces of luggage, very particularly suitcases. Sheets which are obtainable with the polymer composition according to the invention have a high mechanical stability, a high scratch resistance, pleasant haptic properties and an excellent homogeneous external visual impression. The present invention furthermore relates to a process for the preparation of these polymer compositions and a process for production of the sheets according to the invention.

Abstract: A compound represented by the following General Formula (1) is presented. Wherein, in the above General Formula (1), A is a single bond or —C?C— group.

Abstract: The ultraviolet shielding compound is highly transparent in the visible light spectrum and shields approximately 100% of ultraviolet A (UVA), ultraviolet B (UVB) and ultraviolet C (UVC) radiation. The ultraviolet shielding compound is formed from polyvinyl alcohol (PYA) doped with phosphotungstic acid (H3PW12O40). Preferably, the ratio of phosphotungstic acid to polyvinyl alcohol is 1. The ultraviolet shielding compound may be formed by first making a polymeric solution of polyvinyl alcohol dissolved in deionized water. Next, phosphotungstic acid is dissolved in deionized water to form an acidic solution. The acidic solution is added to the polymeric solution to form a mixture. The mixture is then thickened and cast. The cast mixture may then be dried to produce the ultraviolet shielding compound in the form of a flexible film.

Abstract: Oxidation resistant crosslinked ultrahigh molecular weight polyethylene (UHMWPE) is described, wherein at least two different additives in the manufacture synergistically increase the oxidation resistance of crosslinked UHMWPE. This allows the manufacture of oxidation resistant crosslinked UHMWPE using lower levels of additives and/or lower levels of crosslinking irradiation or chemicals. The lower levels of additives and/or crosslinking produce crosslinked UHMWPE having desired physical properties not possible without the synergistic interaction of the additives. This crosslinked UHMWPE may be used in medical prostheses such as in bearing components having desired physical properties such as wear resistance and oxidation resistance not possible without the synergistic interaction of the additives.

Abstract: Golf balls consisting of a core and a cover are disclosed. The core is a solid, single-layer core formed from a rubber composition comprising a base rubber and a quinhydrone. The core has a positive hardness gradient such that the difference between the core's surface hardness and the core's center hardness is 25 Shore C units or greater and/or the core has a diameter of from 1.51 inches to 1.59 inches.

Abstract: Golf balls comprising a core and a cover are disclosed. The core is a dual- or multi-layer core, wherein at least one layer is formed from a rubber composition comprising a base rubber and a quinhydrone. The core layer formed from such rubber composition has a positive hardness gradient such that the difference between the layer's outer surface hardness and inner surface hardness is 5 Shore C units or greater.

Abstract: The present invention provides a resin composition that is added when a multi-layer structure containing hydrolyzed ethylene-vinyl acetate copolymer is reground into a multi-layer structure and a process for preparing a multi-layer structure using the resin composition. Specifically, the present invention relates to a resin composition comprising (A) polyolefin, (B) metal salt of higher fatty acid having 12 to 30 carbon atoms and (C) zeolite. Also, the multi-layer structure is prepared by the process of regrinding by adding the resin composition to a multi-layer structure containing hydrolyzed ethylene-vinyl acetate copolymer.

Abstract: A plastic lens which absorbs ultraviolet light having wavelength of about 400 nm and suppresses coloring and a process for producing the lens. A plastic lens may be made from a composition which comprises (A) a lens material monomer comprising diethylene glycol bisallylcarbonate, (B) an organic peroxide-based polymerization initiator, (C) a cobalt compound represented by at least one of CoO.Al2O3 and Co.Al2O4, and (D) at least one ultraviolet light absorbent selected from 2-hydroxy-4-octyloxy-benzophenone, 2,2?,4,4?-tetrahydroxy-4-octyloxybenzophenone and 2,2?,4?-trihydroxy-4-octyloxybenzophenone. A process for producing a plastic lens comprises mixing component (A), component (B), a cobalt fluid comprising component (C) in a dispersant and component (D) and a step of casting the mixed fluid into a mold and polymerizing the fluid to obtain a plastic lens.

Abstract: Compositions comprising one or more olefin polymers functionalized by at least one functionalization agent chosen from carboxylic acids, their esters, their anhydrides and their metal salts and one or more stabilizing agents comprising one or more sterically hindered phenol groups and at most one ester functional group. Process for their preparation and use of these compositions for compatibilizing olefin polymers with polymers, fillers and metal substrates which are incompatible with olefin polymers.

Abstract: A thermoplastic resin composition can be obtained by adding about 0.1 to 20 parts by weight of a diene-series block copolymer (2) to 100 parts by weight of a resin composition containing a polycarbonate-series resin (1) as a basic component of which the proportion of terminal hydroxy groups relative to the whole of the terminals is 1 mole % or above (about 5 to 40 mole %). The polycarbonate-series resin base may further comprise a thermoplastic resin composition (3) such as a rubber-modified styrenic resin. The block copolymer component (2) includes an epoxy-modified block copolymer, etc. When added an organophosphorus compound as a flame retardant (4), or a fluorine-containing resin as a flame-retartant auxiliary (5), a halogen-free flame-retardant thermoplastic resin composition can be obtained. A thermoplastic resin with an improved flowability and impact strength can be obtained by modifying a polymer blend of the polycarbonate-series resin and the styrenic-series resin in quality.

Abstract: Novel dibenzoylresorcinol-based compounds are disclosed wherein the dibenzoylresorcinol is bonded to the residue of either an alcohol or a carboxylic acid group, via a methylene carboxylate linking group; and wherein the dibenzoylresorcinol is bonded directly to a substituted or unsubstituted aryl group which does not include a pendent hydroxyl group. The groups attached to the dibenzoylresorcinol may contain a wide variety of functional sites which permit further reaction, e.g., copolymerization. The described compounds are very useful as UV light absorbers and may be used to form improved coating compositions which usually include a transparent, polymeric matrix material. The coating compositions may be applied to various substrates, e.g., thermoplastics, to afford a selection of enhanced properties, such as UV light resistance and abrasion resistance.

Abstract: A polyacetal resin composition comprises a polyacetal resin, (A) a light stabilizer selected from the group consisting of a benzotriazole compound, a benzophenone compound, an aromatic benzoate compound, a cyanoacrylate compound, and an anilide oxalate compound and (B) an aliphatic acid ester. It is improved in stability to weathing.

Abstract: A polyvinyl alcohol film containing at least one of complexes of hydroxybenzophenone compounds having specific structure, and at least one basic compound selected from the group consisting of (i) a hydroxide, carbonate or bicarbonate of an alkali metal, (ii) carbonate or bicarbonate of ammonium, and (iii) an amine compound. The above film is excellent in the effect of blocking ultraviolet radiation in the wavelength range from 360 to 400 nm, and therefore can be used in the optical fields of polarizing sunglasses, the display fields of a liquid crystal display and fields of wrapping materials for clothes or foods as it is or as a laminate of it with other transparent film.

Abstract: A fluorine-containing benzophenone derivative of the formula (1), (2) or (3):.PHI..sup.1 (--X.sup.1 --Q.sup.1 --R.sub.f.sup.1).sub.n (1).PHI..sup.2 --X.sup.2 --Q.sup.2 --R.sub.f.sup.2 --Q.sup.3 --X.sup.3 --.PHI..sup.3 (2).PHI..sup.4 --X.sup.4 --Q.sub.f --X.sup.5 --.PHI..sup.5 (3)wherein .PHI..sup.1 is a 2-hydroxybenzophenone structure of the formula ka-1: ##STR1## (wherein Y is a hydrogen atom or a hydroxyl group, each of k and m indicates the number of bond sites, k is an integer of from 0 to 3, and m is an integer of from 0 to 3, provided that 1.ltoreq.(k+m).ltoreq.4), n corresponds to (k+m) and is an integer of from 1 to 4, each of .PHI..sup.2, .PHI..sup.3, .PHI..sup.4 and .PHI..sup.5 is a 2-hydroxybenzophenone structure of the formula ka-1 wherein (k+m) is 1, each of X.sup.1, X.sup.2, X.sup.3, X.sup.4 and X.sup.5 is a single bond or an oxygen atom, Q.sup.1 is a single bond or a bivalent linking group having a carbon atom directly bonded to X.sup.1, each of Q.sup.2 and Q.sup.

Abstract: A thermoplastic polycarbonate molding composition free from organo phosphorus compounds and having an improved resistance to discoloration caused by exposure to High Intensity Discharge (HID) light and heat is disclosed. Accordingly, the molding composition contains (co)polycarbonate resin, a dimeric benzotriazole and an ester of a 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid. In a preferred embodiment, a sheet made of (co)polycarbonate resin is rendered improved resistance to discoloration by having applied to at least one of its surfaces an adherent protective film prepared from the polycarbonate composition of the invention.

Abstract: This invention relates to a sprayable adhesive that, when applied to a substrate, exhibits a color that confirms where it has been applied and then fades upon drying.

Abstract: Polyvinyl chloride compositions as well as flexible sheets and swimming pool liners of such compositions which contain significant quantities of an ultra high molecular weight polyvinyl chloride resin together with a heat stabilizer, plasticizer and optional additives are disclosed. In preferred compositions: the PVC resin is a mixture of high molecular weight and ultra high molecular weight PVC: the heat stabilizer is a mixed zinc-barium-alkyl phosphite stabilizer; and the composition contains 2-hydroxy-4-(2-hydroxyethoxy) benzophenone as an ultraviolet light absorber.

Abstract: Ultra-violet screening compounds have been combined with hydrophobic fluid and solid-repellent compounds to provide a spray, and ultimately a thin solid adherent layering, deposit or coating for fabrics and the like that simultaneously imparts both fade or photodegradiation-resisting properties, and fluid and soil repellent properties.

Abstract: A copolymer compositions comprising a major amount of an alternating copolymer of carbon monoxide with one or more olefinically unsaturated compounds and a minor of at least one stabilizing additive which is a zeolite-type trivalent-metal silicate containing a cation of an element of Group 2 of the Periodic Table is disclosed. This copolymer composition has and exhibits improved stability and contains a substantially reduced amount of residual solvent. Also disclosed is a process for producing this copolymer composition, and articles of manufacture made from this composition.

Abstract: Weather-resistant polyacetal resin compositions and molded articles formed of the same include a polyacetal base resin, and a weather-resistant effective amount of a weather stabilizing package comprised of (i) a weather stabilizer that is at least one selected from the group consisting of benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxalanilides and hindered amines (ii) a homopolymer or copolymer of acrylic or methacrylic acid, or ester derivatives thereof, and (iii) a fluororesin.

Abstract: A cycloaliphatic epoxy compound in combination with a 2-hydroxy-substituted benzophenone compound and a polyalkyl-substituted dipiperidine compound provides a UV stabilizer that exhibits synergistic behavior. The compounds can be formulated into a composition that is coated on, or impregnated into, the surface of a plastic article or, alternatively, they can be incorporated into a thermoplastic composition which can be thereafter molded into a shaped article. The stabilizer combination succeeds in upgrading the resistance of polyphenylene ether resins and blends against the photo-deteriorative effects of sunlight and bright indoor light, for example, fluorescent lighting.

Abstract: A primer composition dilluted with a suitable organic solvent comprising (A) an organic copolymer comprising an alkoxysilylated monomer, vinyl acetate and other monomers copolymerizable therewith, (B) a polyalkyl (meth)acrylate, (C) a crosslinking agent for said copolymer (A), and (D) an ultraviolet absorber. This primer composition is a very effective primer in forming an organopolysiloxane coating layer excellent in adhesion, endurance, weathering resistance of the surface of a molded article of a thermoplastic resin.

Abstract: Polyolefins are stabilized against the harmful effects of U.V.-light by incorporating therein certain organosulfides. The organosulfides may be used alone or in synergistic combination with two classes of known light stabilizers, namely the benzophenones and the esters of aromatic acids.

Abstract: Polyvinyl chloride resin stabilizer compositions are provided, comprising a 2,2,6,6-tetramethyl piperidinyl compound and an ammonium or metal perchlorate; and also stabilized polyvinyl chloride resin compositions containing such stabilizers, and optionally including a plasticizer, and particularly as molded articles with polyurethane foam backing.

Abstract: A process for improving the flame retardancy, hygroscopic, soil release and other properties of a polymer substrate is provided in which the substrate is contacted with a suitable aqueous mixture containing a water-soluble monomer and an organic halogen-containing hydrophobic carrier compound at a temperature of between about 40.degree. C. to 100.degree. C. Polymerization of the monomer is thereafter initiated by a chemical or physical initiator to form a polymer evenly disposed on the substrate. The flame retardancy, hygroscopic, soil release and other surface properties of the substrate are thereby improved. The mixture may be in the form of an emulsion wherein the hydrophobic carrier compound is emulsified by an appropriate agent. The invention also pertains to the improved substrates prepared in accordance with the present process.

Abstract: Stabilized, stereoregular polymers of branched, higher alpha-olefins can be modified with unsaturated silanes, carboxylic acids, and/or carboxylic acid anhydrides in the presence of a free radical generator in the polymer melt. These polymers can also contain additional additives, such as glass fibers.

Abstract: Polyphenylene sulfide resin compositions are provided having improved light stability and comprising an alkylidene bis(benzotriazolyl phenol) having the formula: ##STR1## wherein: R.sub.1 is selected from the group consisting of hydrogen and alkyl having from one to about eleven carbon atoms;R.sub.2 is selected from the group consisting of alkyl having from one to about twelve carbon atoms; and arylalkyl having from seven to about eighteen carbon atoms; andX is selected from the group consisting of hydrogen; halogen; alkyl having from one to about twelve carbon atoms; aryl alkyl having from seven to about eighteen carbon atoms; alkoxy having from one to about twelve carbon atoms; phenoxy; arylalkoxy having from seven to about eighteen carbon atoms; and phenyl.

Abstract: A cycloaliphatic epoxy compound in combination with a 2-hydroxy-substituted benzophenone compound and a polyalkyl-substituted dipiperidine compound provides a UV stabilizer that exhibits synergistic behavior. The compounds can be formulated into a composition that is coated on, or impregnated into, the surface of a plastic article or, alternatively, they can be incorporated into a thermoplastic composition which can be thereafter molded into a shaped article. The stabilizer combination succeeds in upgrading the resistance of polyphenylene ether resins and blends against the photo-deteriorative effects of sunlight and bright indoor light, for example, fluorescent lighting.

Abstract: Polycarbonate resin compositions are provided having improved light stability and comprising an alkylidene bis(benzotriazolyl phenol)having the formula: ##STR1## wherein: R.sub.1 is selected from the group consisting of hydrogen and alkyl having from one to about eleven carbon atoms;R.sub.2 is selected from the group consisting of alkyl having from one to about twelve carbon atoms; and arylalkyl having from seven to about eighteen carbon atoms; andX is selected from the group consisting of hydrogen; halogen; alkyl having from one to about twelve carbon atoms; aryl alkyl having from seven to about eighteen carbon atoms; alkoxy having from one to about twelve carbon atoms; phenoxy; arylalkoxy having from seven to about eighteen carbon atoms; and phenyl.

Abstract: Thermoplastically processable polyamide moulding compositions which are equipped with inorganic reinforcing materials and contain 3 to 40% by weight, relative to the amount of polyamide, of bisphenols of the formula (I) ##STR1## where R stands for CH.sub.3, CH.sub.3 O, C.sub.2 H.sub.5 group,m and n independently of each other denote whole numbers from 0 to 4 andX denotes a chemical bond, a C.sub.1 -C.sub.7 -alkylene or C.sub.5 -C.sub.6 -cycloalkylene radical, O, S, SO, SO.sub.2, CO or O--(CH.sub.2).sub.p --O-- with p=2 to 10and with the proviso that the sum of the aliphatic C atoms of all the radicals bonded to the phenol rings is <6.

Abstract: A polyacetal resin composition comprises a polyacetal resin as the matrix, (A) 0.01 to 2.0 percent by weight of a stabilizer selected from a benzotriazole compound, a benzophenone compound and an aromatic benzoate compound and (B) 0.01 to 2.0 percent by weight of a hindered amine compound and is improved in whetherability.

Abstract: Compositions suitable for molding are produced by examining a (1) polyethylene terephthalate polyester, (2) a low molecular weight polyethylene mold release agent (3) talc as nucleating agent, (4) carbon black, (5) a hindered phenolic antioxidant and (6) other optional ingredients such as reinforcing glass fibers.

Abstract: A light stabilizer for recording media subjected to exposure with radiant energy which comprises between about 10 and about 40 parts by weight of a vinyl ether/maleic acid ester copolymer and one part by weight of a hydroxylated benzophenone dissolved in an inert solvent to provide a clear solution and the process of coating said exposed recording media with said composition to a thickness of from about 5 to about 30 micrometers.

Abstract: Alkylidene bisphenol phosphites and phosphates having 2,2,6,6-tetramethyl piperidinyl groups are provided having the formula: ##STR1## wherein: R.sub.1 is alkyl having from one to about twelve carbon atoms;R.sub.2, R.sub.3 and R.sub.4 are each selected from the group consisting of hydrogen and alkyl having from one to about twelve carbon atoms;m is 0 or 1;n is 0 or 1;X is selected from the group consisting of ##STR2## wherein: R.sub.5 is selected from the group consisting of hydrogen, oxyl O.sup.2, alkyl having from one to about twelve carbon atoms; arylalkyl having from seven to about eighteen carbon atoms; 2,3-epoxypropyl, acyl having from one to about eight carbon atoms and ##STR3## in which R.sub.6 is selected from the group consisting of hydrogen, alkyl having from one to about twelve carbon atoms and phenyl, and Y.sub.1 is selected from the group consisting of hydrogen; acyl having from one to about twelve carbon atoms; and ##STR4## Z.sub.1 is selected from the group consisting of ##STR5## wherein R.

Abstract: A composition comprising (A) a polyphenol such as bisphenol A, (B) a polymer resulting from polymerizing (1) an alkenyl phenol such as p-isopropenylphenol and (2) a polymerizable ethylenically unsaturated monomer such as 2-ethylhexyl acrylate can be converted to a copolymer modified polycyanate by reaction with a cyanogen halide such as cyanogen chloride in the presence of a base such as triethylamine. These polycyanates can be cured by trimerization in the presence of a suitable catalyst or by copolymerization with an epoxy resin. Epoxy resins can also be prepared from the composition comprising components (A) and (B) by reaction with an epihalohydrin such as epichlorohydrin and subsequent dehydrohalogenation with a basic acting compound such as sodium hydroxide.

Abstract: A composition comprising (A) a polyphenol such as bisphenol A, (B) a polymer resulting from polymerizing (1) an alkenyl phenol such as p-isopropenylphenol and (2) a polymerizable ethylenically unsaturated monomer such as 2-ethylhexyl acrylate can be converted to a copolymer modified polycyanate by reaction with a cyanogen halide such as cyanogen chloride in the presence of a base such as triethylamine. These polycyanates can be cured by trimerization in the presence of a suitable catalyst or by copolymerization with an epoxy resin. Epoxy resins can also be prepared from the composition comprising components (A) and (B) by reaction with an epihalohydrin such as epichlorohydrin and subsequent dehydrohalogenation with a basic acting compound such as a sodium hydroxide.

Abstract: A composition comprising (A) a polyphenol such as bisphenol A, (B) a polymer resulting from polymerizing (1) an alkenyl phenol such as p-isopropenylphenol and (2) a polymerizable ethylenically unsaturated monomer such as 2-ethylhexyl acrylate can be converted to a copolymer modified polycyanate by reaction with a cyanogen halide such as cyanogen chloride in the presence of a base such as triethylamine. These polycyanates can be cured by trimerization in the presence of a suitable catalyst or by copolymerization with an epoxy resin. Epoxy resins can also be prepared from the composition comprising components (A) and (B) by reaction with an epihalohydrin such as epichlorohydrin and subsequent dehydrohalogenation with a basic acting compound such as sodium hydroxide.

Abstract: A composition comprising (A) a polyphenol such as bisphenol A, (B) a polymer resulting from polymerizing (1) an alkenyl phenol such as p-isopropenylphenol and (2) a polymerizable ethylenically unsaturated monomer such as 2-ethylhexyl acrylate can be converted to a copolymer modified polycyanate by reaction with a cyanogen halide such as cyanogen chloride in the presence of a base such as triethylamine. These polycyanates can be cured by trimerization in the presence of a suitable catalyst or by copolymerization with an epoxy resin. Epoxy resins can also be prepared from the composition comprising components (A) and (B) by reaction with an epihalohydrin such as epichlorohydrin and subsequent dehydrohalogenation with a basic acting compound such as sodium hydroxide.

Abstract: Disclosed are stabilized polyester compositions having significantly improved weatherability, said polyesters consisting of homopolyesters derived from a dicarboxylic acid component wherein at least a major portion of which is 1,4-cyclohexanedicarboxylic acid (or ester) having a trans isomer content of at least 65% and a glycol component wherein at least a major portion of which is 2,2,4,4-tetramethyl-1,3-cyclobutanediol and copolyesters thereof with modifying aliphatic glycols and/or aliphatic dicarboxylic acids, said polyesters being stabilized with the combination of at least one ultraviolet light stabilizing compound compatible with said polyester and at least one hindered amine light stabilizer having the formulae ##STR1## the groups shown as R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently selected from various substituents.

Abstract: Disclosed are stabilized polyester compositions having significantly improved weatherability. These polyesters consist of copolyesterethers derived from a dicarboxylic acid component comprising about 80-100 mole % 1,4-cyclohexanedicarboxylic acid having a trans isomer content of at least 70% and about 0-20 mole % of a second dicarboxylic acid and a glycol component comprising about 70-95 mole % 1,4-cyclohexanedimethanol and about 5-30 mole % of a polyalkylene ether glycol having a molecular weight of about 600 to about 3000. The copolyesterether compositions further comprise a stabilizing effective amount of the combination of (1) at least one hindered phenolic antioxidant, (2) at least one ultraviolet light stabilizing compound compatible with said copolyesterether and (3) at least one hindered amine light stabilizing compound having the formulae ##STR1## the groups shown as R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently selected from various substituents.

Abstract: Conductive paint comprises an organic solvent having dissolved and dispersed therein a binder containing a thermosetting resin and a hydroquinone derivative which is a product resulting from reaction between a hydroquinone (polyhydric phenol) and a fatty acid having 10 to 20 carbon atoms, added to the thermosetting resin, metal powder as a conductive material, and preferably a fatty acid derived from natural oils and fats and having 10 to 20 carbon atoms. This conductive paint exhibits characteristics not inferior to those of the conventional Ag conductive paint, such as low specific resistance, high moisture resistance and high heat resistance, and is much less expensive than the conventional Ag conductive paint.

Abstract: A polyphenylene ether resin composition comprising(A) a polyphenylene ether resin,(B) at least one compound selected from the group consisting of 2-(o-hydroxyphenyl)benzotriazoles represented by the following formula (I) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different and each represents a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, an alkoxy group, an alkoxycarbonylalkyl group, an aryl group or an aralkyl group, and X represents a halogen atom,and 2-hydroxybenzophenones represented by the following formula (II) ##STR2## wherein R.sup.5 represents a hydrogen atom, a hydroxyl group or an alkoxy group, R.sup.6 represents a hydrogen atom or a hydroxyl group, R.sup.7 represents a hydrogen atom or a sulfonic acid group, and R.sup.8 represents a hydrogen atom, an alkyl group or an aromatic acyl group,(C) an organic phosphite, and(D) a sterically hindered phenol.

Abstract: A polymeric composition comprised of a mixture of an acetylene-terminated polymer and an hydroxy-substituted, polynuclear, aromatic derivative as a cure retarding additive.

Abstract: A thermoplastic polycarbonate molding composition free from organo phosphorus compounds and having an improved resistance to discoloration caused by exposure to High Intensity Discharge (HID) light and heat is disclosed. Accordingly, the molding composition contains (co)polycarbonate resin, a dimeric benzotriazole and an ester of a 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid. In a preferred embodiment, a sheet made of (co)polycarbonate resin is rendered improved resistance to discoloration by having applied to at least one of its surfaces an adherent protective film prepared from the polycarbonate composition of the invention.