Abstract: A shaped article is disclosed which is formed from a polymer mixture of polyamide polymer, pigment dispersed in a polymeric carrier and about one-half to nine percent free polyester based on the weight of the polymer mixture. A process for making the shaped article is also disclosed, wherein the polymer mixture is melted, mixed and formed into the shaped article. The invention is especially suited for use in forming multifilament yarn, where the use of the invention facilitates the spinning of yarns containing difficult-to-spin pigments. The invention may be advantageously employed using conventional polyamide melt-spinning techniques.

Abstract: A resin composition for powder coating, comprising(A) a carboxyl group-containing resin having a number average molecular weight of 1000 to 20000, an acid value of 5 to 200 and a glass transition temperature of 30 to 120.degree. C.,(B) bis(.beta.-methylglycidyl)terephthalate of the formula (1): ##STR1## as a curing agent, and (D) at least one compound selected from the group consisting of amines having the linkage of the formula (2): ##STR2## in the molecule, a triarylphosphines and onium salts as a ring-opening polymerization inhibitor, the equivalent ratio of (.beta.-methylglycidyl group of the component (B))/(carboxyl group of the component (A)) being 0.5 to 3.0. The composition can give a product of curing excellent in impact resistance, weathering resistance and so on.

Abstract: The invention relates to an imaging element comprising a substrate having at least two polymer layers on the side bearing an imaging layer wherein at least one of said layers has incorporated therein a stabilizing amount of hindered amine.

Abstract: Disclosed is a process for stabilizing polyamides against the damage effected by light, heat and/or oxidation while improving the differential dyeability, and processing stability therefore, comprising incorporating therein by melt-processing a synergistic additive system resulting in a uniform and intimate mixture with said polyamide, said additive system is selected from the group consisting of (I), (II) and (III)(I) is from 0.01% to 1% by weight of a sterically hindered phenylphosphonite (Ia) with from 0.05% to 5% by weight of oxanilide (Ib) or said (Ia) together with from 0.05% to 5% by weight of an aromatic di- or tri-carbonyl compound containing at least one, and preferably two hindered amine moieties (Ic);(II) is from 0.05% to 5% by weight of oxanilide (IIa) together with from 0.05% to 5% by weight of a aromatic di- or tri-carbonyl compound (IIb) containing at least one hindered amine moieties;(III) is from 0.01% to 1% by weight of a sterically hindered phenyl phosphonite (Ia), from 0.

Abstract: A capillary electrophoresis system and method of electrokinetically loading a capillary electrophoresis sample into a separation medium in a capillary tube in which an entangled polymer matrix is formed having the sample embedded therein. The matrix has a mesh size effective to retard movement of macromolecules such as DNA sequencing templates through the matrix when an electric field is applied across the matrix. The entangled polymer matrix is formed by a linear polymer having a molecular weight of at least 20K Daltons. Furthermore, the invention includes stable denaturants useful for the electrophoresis of nucleic acids.

Abstract: A light stabilizer package is disclosed. The light stabilizer package comprises a monomeric HALS having a pKa of no greater than 7, an ultraviolet light absorber and, optionally, a polymeric HALS having a pKa of less than 7. The light stabilizer package may be blended with a thermoplastic olefin to form a moldable light stable composition. An article comprising the moldable light stable composition may have an exterior surface that is at least partially coated.

Abstract: Compositions of precipitated anionic polymers containing mixtures of certain salts as well as processes for making and using the same are disclosed.

Abstract: The compression set of elastomeric silicone compositions, addition cured injection moldable compositions, is reduced by the incorporation of nitrogen compounds wherein the nitrogen possesses at least one organic substituent and the nitrogen is tetravalent wherein the nitrogen is cationic. The adhesion of such compositions to thermoset or thermoplastic polymer substrates is improved by the addition of bis(trimethoxysilylpropyl)fumarate and a disilanol that may or may not contain alkenyl groups. The lubricity of such compositions is improved by the addition of compounds selected from the group consisting of diorganosiloxanes such as polydimethylsiloxanes, phenyl containing siloxanes such as copolymers of diphenylsiloxane with diorganosiloxanes and copolymers of methylphenylsiloxane with diorganosiloxanes, fluorosilicones such as silicones containing trifluoropropyl substituted siloxanes, polydimethylsiloxanes, aliphatic and aromatic hydrocarbons that are liquid between 0.degree. C. and 100.degree. C.

Abstract: The invention relates to a process for increasing the molecular weight of polycondensates and at the same time stabilizing them, essentially without crosslinking, which comprises heating a polyamide, a polyester, a polycarbonate or a copolymer or blend of these polymers with addition of at least one diepoxide comprising terminal epoxide groups and as a further structural element a tetramethylpiperidine radical located centrally between the epoxide groups to a temperature which is above the melting point of the polymer in the case of crystalline polycondensates or above the glass point in the case of amorphous polycondensates. The invention additionally relates to mixtures comprising the corresponding diepoxides, to their use, and to polycondensates prepared from them.

Abstract: By heating at above the melting point or glass transition point of the polyamide and adding a secondary aromatic amine and a difunctional epoxide it is possible to bring about an increase in the molecular weight and/or viscosity of virgin polyamide and recycled polyamide.

Abstract: A synergistic stabilizer mixture comprising a component a) and, for example, a component b), where component a) is at least one compound of the formula I ##STR1## in which R.sub.1 is C.sub.1 -C.sub.10 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.1 -C.sub.4 alkyl-substituted C.sub.5 -C.sub.12 cycloalkyl, phenyl or C.sub.1 -C.sub.10 alkyl-substituted phenyl,R.sub.2 is C.sub.3 -C.sub.10 alkylene,R.sub.3 is hydrogen, C.sub.1 -C.sub.8 alkyl, O.sup..cndot., --CH.sub.2 CN, C.sub.3 -C.sub.6 alkenyl, C.sub.7 -C.sub.9 phenylalkyl, C.sub.7 -C.sub.9 phenylalkyl which is substituted on the phenyl radical by C.sub.1 -C.sub.4 alkyl; or C.sub.1 -C.sub.8 acyl, andn.sub.1 is a number from 1 to 50,and component b) is, for example, a compound of the formula ##STR2## in which n.sub.2 is a number from 2 to 20.

Abstract: A stabilizer combination, principally for PVC, is described which essentially comprisesA) at least one zinc compound of the formula IZn(R.sup.1 R.sup.2) (I)andB) at least one metal compound of the formula IIMe.sup.n+ (R.sup.3.sub.a R.sup.4.sub.b R.sup.5.sub.c) (II)in which Me is Al, Mg, Na or K,a, b and c are 0, 1, 2 or 3,n=a+b+c and can be from 1 to 3, and at least one radical R.sup.1 to R.sup.5 independently of one another are C.sub.1 -C.sub.22 carboxylates, C.sub.2 -C.sub.21 alkenyl-CO.sub.2 --, phenyl-CO.sub.2 --, naphthyl-CO.sub.2 --, C.sub.5 -C.sub.12 cycloalkyl-CO.sub.2 --, C.sub.7 -C.sub.18 alkylphenyl-CO.sub.2 --, C.sub.7 -C.sub.18 alkylphenyl-O--, C.sub.7 -C.sub.9 phenylalkyl-CO.sub.2 --, C.sub.1 -C.sub.21 -alkyl-O--, R.sup.8 --O--CO--[CH.sub.2 ].sub.p --S-- or a radical of the formula R.sup.6 --CO--CH.dbd.CR.sup.7 --O.sup..crclbar.

Abstract: This invention relates to an improved free radical polymerization process for directly producing stable vinylpyridine polymer particles in an aqueous suspension and in a high state of polymer purity by effecting the polymerization in the presence of a water soluble suspension agent selected from the group of polyvinyl lactam, a hydroxy-containing polymer, a polyvinyl alcohol and a mixture thereof.

Abstract: A description is given of compounds of formula 1 ##STR1## and of compounds of formula 2 ##STR2## wherein X, Y and Z and the radicals R.sup.1 and also m and n have the meanings claimed in claim 1.The cited compounds are advantageously used e.g. for stabilizing organic material against the damaging effect of light, oxygen and/or heat.

Abstract: A description is given of compounds of the formula I ##STR1## where R.sup.1 is H, C.sub.1 -C.sub.12 alkyl, C.sub.2 -C.sub.12 alkenyl, C.sub.2 -C.sub.12 alkynyl, O--C.sub.1 -C.sub.12 alkyl, CO--C.sub.1 -C.sub.12 alkyl, in which radicals alkyl chains may also be interrupted by O, S, S.dbd.O, SO.sub.2 or N--C.sub.1 -C.sub.12 alkyl, or is C.sub.5 -C.sub.12 cycloalkyl which is unsubstituted or substituted by1 to 4 C.sub.1 -C.sub.4 alkyl and/or C.sub.1 -C.sub.4 alkoxy radicals, O--C.sub.5 -C.sub.12 cycloalkyl, which is unsubstituted or substituted by 1 to 4 C.sub.1 -C.sub.4 alkyl and/or C.sub.1 -C.sub.4 alkoxy radicals, CO--C.sub.6 -C.sub.14 aryl, which is unsubstituted or substituted by 1 to 9 C.sub.1 -C.sub.4 alkyl and/orC.sub.1 -C.sub.4 alkoxy radicals, O-benzyl, which on the aromatic ring is unsubstituted or substituted by 1 to 4 C.sub.1 -C.sub.4 alkyl and/or C.sub.1 -C.sub.4 alkoxy radicals, CO-benzyl, which on the aromatic ring is unsubstituted or substituted by 1 to 4 C.sub.1 -C.sub.4 alkyl and/or C.sub.

Abstract: The compression set of elastomeric silicone compositions, addition cured injection moldable compositions or millable compositions, is reduced by the incorporation of nitrogen compounds wherein the nitrogen possesses at least one organic substituent and the nitrogen is tetravalent wherein the nitrogen is cationic.

Abstract: The invention relates to an imaging element comprising a paper substrate and a layer adjacent said paper comprising polyolefin polymer and a hindered amine stabilizer wherein said hindered amine stabilizer has a number average molecular weight of less than 2300.

Abstract: The compression set of elastomeric silicone compositions, addition cured injection moldable compositions or millable compositions, is reduced by the incorporation of nitrogen compounds wherein the nitrogen possesses at least one organic substituent and the nitrogen is tetravalent wherein the nitrogen is cationic. The adhesion of such compositions to thermoset or thermoplastic polymer substrates is improved by the addition of bis(trimethoxysilylpropyl)fumarate and a disilanol that may or may not contain alkenyl groups.

Abstract: A ductile, gamma radiation resistant olefin polymer composition, including (a) an olefin in polymer, (b) an amount of N,N-dialkylhydroxylamine which is effective to increase the ductility of the composition, and (c) a polysiloxane which contains sterically hindered piperidino groups and which is present in an amount effective to increase the gamma radiation resistance of the composition. The composition may be used to manufacture sterilizable articles including food packaging and medical articles.

Abstract: Copolymers are disclosed of lower alpha-olefins and HALS-containing monomers, typically 1-(10-undecenyl)-2,2,6,6-tetramethylpiperidine. They may be used for light or heat stabilizing, by themselves or in blends with other polymers.

Abstract: A light-curing composite material is described which is characterized by a content of anaerobic stabilizer and/or stable organic radicals and which has a reduced light sensitivity and an improved vacuum stability and is therefore suitable in particular as a dental filling material.

Abstract: Stabilizer mixture comprising, for example, a compound of the formula ##STR1## and, for example, a compound of the formula ##STR2##

Abstract: Incorporation into polyacetal compositions of at least one hindered amine light stabilizer which contains a hindered nitrogen that is acetylated results in a composition having good light stability, thermal stability, and physical property retention after exposure to heat and air.

Abstract: Polyolefin or polyolefin copolymer films for agricultural applications stabilized with a sterically hindered amine and a metal oxide or hydroxide selected from oxides of zinc, aluminum, calcium and magnesium, and hydroxides of zinc, aluminum and calcium, show improved light stability and pesticide resistance.

Abstract: A process to reduce the compression set of elastomeric silicone compositions, addition cured injection moldable compositions or millable compositions, comprises the incorporation of nitrogen compounds wherein the nitrogen possesses at least one organic substituent and the nitrogen is tetravalent wherein the nitrogen is cationic.

Abstract: A composition, suitable for stabilizing a polymeric composition against the effects of light, comprisinga) an N-acylated 2,2,6,6-tetraalkylpiperidinyl group (hereinafter N-acylated HALS) containing compound; andb) an N-oxy-subst. 2,2,6,6-tetraalkylpiperidinyl group (hereinafter N-oxy-substituted HALS) containing compound.A further aspect of the invention relates to a composition, suitable for stabilizing a polymeric composition against the effects of light, comprisinga) an N-acylated 2,2,6,6-tetraalkylpiperidinyl-group-containing compound in which a spiro group is attached in the 4-position (hereinafter defined as component i); andb) an N-acylated 2,2,6,6-tetraalkylpiperidinyl-group-containing compound in which in the 4-position no spiro group is present (hereinafter defined as component ii).These compounds are suitable as light stabilizers in acid catalyzed lacquer system.

Abstract: Methods for preparing rigid-rod macromonomers having a polyaromatic backbone, solubilizing side groups, and reactive end groups are provided. Such methods include catalytic reductive coupling of substituted 1,4-dihaloaromatic compounds in the presence of an endcapping moiety.

Abstract: A description is given of tetramethylpiperidine-containing copolymers comprising 1-100 mol % of identical or different monomer units of the general formula I ##STR1## (R.sup.1 =COOR.sup.7, COR.sup.8, CONR.sup.8 R.sup.9, CN; R.sup.2 =H, C.sub.1 -C.sub.12 -alkyl, COOR.sup.7, COR.sup.8, CONR.sup.8 R.sup.9, CN; R.sup.3 =H, methyl, ethyl, propyl; R.sup.6 =H, C.sub.1 -C.sub.8 -alkyl; R.sup.7 =H, C.sub.1 -C.sub.8 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, C.sub.3 -C.sub.5 -alkenyl, substituted or unsubstituted phenyl; R.sup.8 and R.sup.9 =H, C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, substituted or unsubstituted phenyl; X=oxygen, sulfur, NR.sup.6) and also other monomers, and also of processes for preparing the copolymers, of the use of the copolymers as stabilizers, including light stabilizers, and of organic material comprising the copolymers.

Abstract: A use for synergistic additives for polyamides is disclosed by forming a uniform and intimate mixture with polyamide with a component system selected from (I) (II) or (III) (on a weight basis) where(I) is from 0.01% to 1% of a sterically hindered phenyl phosphonite (Ia) with from 0.05% to 5% of a non-hydroxyl substituted oxanilide(Ib) (together 1a+1b), or Ia together with an aromatic di-carbonyl compound containing two hindered amine moieties (together Ia+c). Preferably the weight ratio of Ia to Ib and Ia to Ic is from 1:3 to 1:10, more preferably 1:4, 1:5 or 1:6 and most preferably 1:5; and(II) is from 0.05 to 5% of a non-hydroxyl substituted oxanilide containing at least two hindered amine groups (a) together with from 0.05 to 5% of the aromatic di-carbonyl compound (b), (II a+b),or (III) from 0.01% to 1% of a sterically hindered phenyl phosphonite, from 0.05 to 5% of a non-hydroxyl substituted oxanilide, and from 0.05 to 5% of an aromatic di-carbonyl compound.

Abstract: A salt of formula IF.sub.n.A (I)in which F is the residue of a metal free anionic dyestuff having 1 to 4 acids groups,n is 1 to 2; andA is a group containing 1 to 4 sterically hindered amine groups and at least n ammonium or immonium groups.

Abstract: Described are novel photochromic indeno-fused naphthopyran compounds, examples of which are naphthopyran compounds having a substituted or unsubstituted indeno group, the 2,1 positions of which are fused to the f side of the naphtho portion of the naphthopyran, and having certain substituents at the 3-position of the pyran ring. Certain substituents may also be present at the number 5, 6, 7, 8, 9, 10, 11, 12 or 13 carbon atoms of the compounds. These compounds may be represented by the following graphic formula: ##STR1## Also described are polymeric organic host materials that contain or that are coated with such compounds. Optically clear articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., certain other naphthopyrans, benzopyrans and spiro(indoline)type compounds, are also described.

Abstract: Compositions comprising a synthetic organic polymer and, as stabilizer, a combination ofA) a sterically hindered hydroxylamine, or an ether or ester thereof, andB) a compound containing an oxo and/or hydroxyl group bonded to a metal atom,show an excellent stability against the deleterious effects of light, oxygen and/or heat.A combination of components A and B is also effective to stabilize a polyolefin or olefin copolymer film for agricultural applications against deleterious effects of light, oxygen, heat and pesticides.

Abstract: There are herein disclosed a method for preparing a modified resin which comprises thermal/reaction by the use of a norbornenyl group-containing compound typified by norbornenecarboguanamine or its derivative, a method for preparing an epoxy-modified resin which comprises the step of reacting the above-mentioned modified resin and an epoxide, a flame-retarding method, a thermal stabilization method, a compatibilizing method and a surface modification method which comprise utilizing the modified resin, as well as a coating resin composition and an adhesive resin composition containing the modified resin.According to the preparation methods of the present invention, the deterioration of a material scarcely occurs, and a functional group which is excellent in flame retardancy, thermal stability, compatibility and the like can be introduced to the resins.

Abstract: Selected derivatives of 1-oxyl-2,2,6,6-tetramethyl-4-hydroxypiperidine are surprisingly effective as inhibitors to prevent the premature polymerization of acrylic and methacrylic acids, their esters, their amides, vinyl acetate and acrylonitrile in the presence of water. Some of these derivatives are new compounds.

Abstract: An embrittlement-resistant polyolefin composition, including: (a) at least 80% by weight, based on the total weight of the polyolefin composition, of a crystalline polymer comprising either a propylene homopolymer having an isotactic index greater than 90 or a random copolymer of propylene and either ethylene or C.sub.4 -C.sub.10 1-olefins, (b) an elastomeric copolymer of ethylene and either propylene or butene-1, where the elastomeric copolymer is present in an amount sufficient to enhance the flexibility of the polyolefin composition, without adversely affecting the clarity of the polyolefin composition, and where the polyolefin composition has a heat distortion temperature of at least 60.degree. C. Optional components include a stabilizing amount of a hindered amine light stabilizer, an acid neutralizing agent, and a sorbitol-based compound. The composition may be used to manufacture medical articles and food packaging material which must be sterilized, either by irradiation or by autoclaving.

Abstract: The present invention provides polyhexamethylene adipamide fibers significantly excellent in thermal yellowing resistance, and a process for producing the same. The improved polyhexamethylene adipamide fibers have adaptability to fibers for clothing which adaptability is comparable to that of poly-.epsilon.-capramide fibers and polyester fibers. The improved polyhexamethylene adipamide fibers can be obtained by either (1) melt spinning a polyhexamethylene adipamide simultaneously containing 2,4-bis(alkylthio)-6-(3,5 -dialkyl-4-hydroxyanilino)-1,3,5-triazine and a compound selected from the group consisting of phosphorous acid, hypophosphorous acid and derivatives of these acids, or (2) melt spinning the fibers having the sum of an amino end group concentration (?--NH.sub.2)!) and a carboxyl end group concentration (?--COOH!) of 70 to 200 meq/kg, satisfying the condition: ?--COOH!.ltoreq.60 meq/kg, and containing from 0.005 to 0.

Abstract: A non-toxic, antifouling coating composition is provided which comprises zinc oxide which has ben surface coated by photosensitizer(s) which increase the capability of zinc oxide to absorb visible light.

Abstract: The invention relates to a thermoplastic elastomer comprising a blend of a rubber and a thermoplastic resins the rubber being at least partially cured with a phenolic curative. The invention is that, to overcome problems with surface cracking, the thermoplastic elastomer also comprises a hydrolysis-insensitive HALS-compound.The invention also relates to the preparation of such a thermoplastic elastomer.

Abstract: This invention provide an adhesive tape and a liquid adhesive for electronic parts having sufficient thermal resistance and reliability. The adhesive tape comprises an adhesive layer composed of at least a polyimide comprising the repeating units represented by the formulas (1) and (2), provided on surface of a heat resistance film or a release film: ##STR1## wherein X is --SO.sub.2 -- and/or --C(.dbd.O)--OCH.sub.2 CH.sub.2 O--C(.dbd.O)--, Ar is a divalent group containing aromatic rings, and R is an alkylene group having 1 to 10 carbon atoms or --CH.sub.2 OC.sub.6 H.sub.4 --, and n means an integer of 1 to 20.

Abstract: Compositions of precipitated anionic polymers containing mixtures of certain salts as well as processes for making and using the same are disclosed.

Abstract: A thermoplastic resin composition improved in terms of prevention of mold contamination, comprising the following components (A) to (G):component (A): 55 to 75% by weight of a propylene-ethylene block copolymer including a propylene homopolymer moiety having a melt flow rate of 15 to 50 g/10 min. and an isotactic pentad fraction of at least 0.97, said block copolymer having a melt flow rate of 10 to 30 g/10 min. and an ethylene content of 2 to 6% by weight,component (B): 0 to 10% by weight of an ethylene-propylene copolymer rubber having a melting temperature of 30.degree. to 60.degree. C. and a melt flow rate of 0.2 to 2 g/10 min.,component (C): 5 to 15% by weight of an ethylene-.alpha.-olefin copolymer rubber having a melting temperature of 60.degree. to 100.degree. C. and a melt flow rate of 0.3 to 2 g/10 min.,component (D): 15 to 25% by weight of a talc having an average particle diameter of up to 5 .mu.m and a specific surface area of at least 3.5 m.sup.

Abstract: Weatherable polycarbonate compositions (formulations or blends) comprise at least one of a piperazinone and piperazine dione based HALS, and at least one of a benzotriazole, benzophenone, triazine, oxanilide, and cyanoacrylate based UVA. The combination of these HALS and UVA exhibits a synergy that results in enhanced protection of the polycarbonate compositions by imparting photostability to the polycarbonate formulations, thereby reducing yellowing or other forms of light induced degradation.

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: Amide-containing polymers characterized by the presence of piperazine amide and/or substituted piperazine amide in the polymer chain are used as adsorbents to remove polyphenolic compounds from liquids. The compositions are especially useful in combination with protein removal agents such as silica gel or tannin. The amide-containing polymer compositions (alone or in combination with protein removal agents) are especially useful in the stabilization and/or chillproofing of plant derived liquids or beverages such as beer, wine, fruit juice and vegetable juice.

Abstract: A plugging compound for the chemical fastening of anchor bolts, threaded sleeves and screws in drill-holes, comprising a reactive resin and--spatially separated therefrom--a curing agent for the resin, includes from 0.0005 to 2% by weight of a piperidinyl or tetrahydropyrrolyl nitroxide as inhibitor in the reactive resin.

Abstract: Selected s-triazines of formula I ##STR1## where G.sub.1 and G.sub.2 are biphenylyl moieties, are UV absorbers having high thermal stability and surprisingly high extinction coefficients making them of especial interest in stabilizing automotive coatings where such properties are highly valued.

Abstract: A light-curing composite material is described which is characterized by a content of anaerobic stabilizer and/or stable organic radicals and which has a reduced light sensitivity and an improved vacuum stability and is therefore suitable in particular as a dental filling material.

Abstract: 1,2-Bis-adducts of stable hindered nitroxide compounds with substituted ethylenes are prepared by reacting two equivalents of nitroxyl compound with an ethylenically unsaturated compound such as styrene or an acrylate ester. These adducts are very effective inhibitors to prevent the premature polymerization of ethylenically unsaturated monomers when such monomers are distilled, processed or stored.

Abstract: The present invention provides a stabilizer comprising a substituted cyclohexene compound of a hindered piperidine type wherein the 1- and 2-positions on a cyclohexene ring are doubly bonded, a carbon atom situated at the 4-position and/or the 5-position of the cyclohexene ring contains a substituent having a C.dbd.O group at its alpha-position, at least one carbon atom of the cyclohexene ring located adjacent to said carbon atom having the C.dbd.O group has a hydrogen atom as a substituent, and at least one group containing a 2,2,6,6-tetramethyl-4-piperidyl group attached to the 3-, 4-, 5- or 6-position of the cyclohexene ring; and/or other substituted cyclohexene compound of a hindered piperidine and/or a compound of a hindered piperidine. The stabilizers of the present invention can exhibit improved properties in light stability and in bleed out resistance even without a phenol type antioxidant.

Abstract: A coating composition comprisinga) a film-forming materialb) a stabilizing effective amount of a light stabilizing composition which comprises a blend of at least one diphenyloxamine of the formula ##STR1## where R.sub.1 is hydrogen, alkyl, alkoxy or halogen;R.sub.2 is hydrogen, alkyl, alkoxy, halogen, phenyl or phenoxy; andR.sub.3 and R.sub.4 are hydrogen, alkyl or alkoxy and at least one selected tetraalkylpiperidine.In a preferred embodiment, a benzotriazole is also present in the light stabilizing composition.The coating compositions are especially useful for the automotive market.The invention further relates to a method for enhancing the light stability of coatings comprising adding to the solids content of the coating composition a stabilizing quantity of the above-mentioned light stabilizing composition. The invention also relates to the corresponding stabilized coating film.