Abstract: A process and composition for improving the ultraviolet radiation stability of articles made from resins subject to photo degradation by contacting the article at a selected temperature with a stabilizer composition comprising an ultraviolet radiation absorber and a hindered amine light stabilizer in a nonagressive liquid carrier.

Abstract: Thermosetting synthetic resin lacquer compositions are provided having improved resistance to deterioration when exposed to ultraviolet light, comprising a 1-phenoxycarbonyl-2,2,6,6-tetramethylpiperidyl compound.

Abstract: Mixed light stabilizers for synthetic polymers are provided having the formula ##STR1## wherein: R is a polyvalent group selected from the group consisting of aliphatic hydrocarbon groups having from one to about twenty carbon atoms, cycloaliphatic hydrocarbon groups having from three to about sixteen carbon atoms and aromatic hydrocarbon groups having from six to about thirty carbon atoms; such groups substituted with from one to about six groups selected from the group consisting of hydroxy, acyloxy, and halogen; and N(C.sub.n.sbsb.1 H.sub.2n.sbsb.1).sbsb.3 where n.sub.1 is a number from one to five;R.sub.1 is selected from the group consisting of hydrogen, oxyl, alkyl, epoxy alkyl and hydroxy alkyl having from one to about twelve carbon atoms, alkyl aryl having from six to about eighteen carbon atoms, and acyl having from two to about twelve carbon atoms;R.sub.2 is selected from the group consisting of alkyl and alkenyl having from eight to about thirty carbon atoms;R.sub.

Abstract: Novel compounds containing piperidine groups, of the general formula ##STR1## in which R.sub.1 is hydrogen, O--, cyanomethyl, C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.12 -alkenyl or -alkynyl, C.sub.7 -C.sub.12 -aralkyl or C.sub.1 -C.sub.12 -acyl, m is an integer from 1 to 12, n is an integer from 1 to 3 and A is an amine radical, are suitable as light stabilizers, heat stabilizers and oxidation stabilizers for synthetic polymers. Processes for their preparation are also described.

Abstract: Alpha-cyanocinnamate ultraviolet-absorbing stabilizers of the formula ##STR1## Where T is alkyl of 4 to 14 carbon atoms, and R.sub.4 is alkyl of 1 to 4 carbon atoms, are particularly resistant to loss during weathring of outdoor thermoset or thermoplastic coating systems while exhibiting good stabilization efficacy and compatibility in said systems.

Abstract: Organic materials such as polypropylene are stabilized with a mixture of(A) N,N'-bis[2-(3-[3,5-di-t-butyl-hydroxyphenyl]propionyloxy)ethyl]oxamide with one of the following stabilizers:(B.sub.1) 2-hydroxy-4-n-octoxybenzophenone;(B.sub.2) 2-(3,5-di-t-butyl-5-hydroxyphenyl)-5-chlorobenzotriazole; or(B.sub.3) N-hydroxyethyl-2,2,6,6-tetramethylpiperidino succinic acid ester.

Abstract: Oligomeric esters of the formula I or II ##STR1## in which n has a value from 1 to 3, R.sup.1 and R.sup.2 are divalent organic radicals, at least one of which contains a polyalkylpiperidine radical of the formula III ##STR2## in which R is hydrogen or C.sub.1 -C.sub.4 -alkyl and E and E' are end groups, are prepared by polycondensing a dicarboxylic acid ester with a diol, one of the two components being used in a molar excess of 33 to 100%. The end groups of these oligoesters can be modified by reaction with a monofunctional component. If two different dicarboxylic acid esters or diols are used, the corresponding co-oligoesters are obtained. All these oligoesters are valuable light stabilisers for light-sensitive organic material, especially for polymer.

Abstract: An additive for coating compositions which is a blend of(A) 20-50% by weight of a polyisocyanate of one of the following formulas: ##STR1## where R.sup.1 is (CH.sub.2).sub.6, (B) 1-15% by weight of an ester of a polyalkylene glycol alkyl alkylate, an alkyl phthalate or an alkyl aromatic phthalate(C) 1-10% by weight of a blend of ultraviolet light stabilizers and(D) 25-78% by weight of organic solvent; the additive can be added to acrylic lacquers, nitrocellulose lacquers, acrylic-alkyd enamels and acrylic polyurethane enamels to provide flexible finishes for flexible substrates used in automobile and truck bodies.

Abstract: A rubber composition containing carbon black as a reinforcing filler and a quaternary ammonium salt as a coupling agent and a method of making it are disclosed.

Abstract: A rubber composition containing carbon black and a second particulate filler of kaolin, metakaolin, talc, pyrophyllite coal, coke, graphite or metal carbonate filler and a method of making it are disclosed.

Abstract: A method for producing foam polyolefin products which are light-stable and weather-resistant are obtained by the combined use of the following stabilizers:(a) phenolic antioxidants,(b) substituted benzophenones and/or substituted benzotriazoles, and(c) sterically hindered amines.

Abstract: There are provided piperidine derivatives having the formula ##STR1## wherein R represents a hydrogen atom or a C.sub.1 -C.sub.3 group, and R.sup.2 and R.sup.3 represent a hydrogen atom or taken together, form ##STR2## There is also provided a method for producing the above compounds which comprises reacting a tricetonamine derivative represented by the formula ##STR3## wherein R has the same meaning as described above, or its salt with sorbitol.The subject piperdine derivatives are useful as stabilizers for preventing the deterioration of polymers by light.

Abstract: YMedical instruments, e.g., syringes, which can be sterilized by gamma irradiation and which are made of polyolefin resins (preferably a polypropylene polymer) which are resistant to gamma irradiation. The polyolefin is compounded with a specific hindered amine and a specific phenol or its phosphorous ester, each in an amount of from 0.01 to 1 part by weight per 100 parts of the polyolefin.

Abstract: An elastomeric composition whose scorch is inhibited comprises [I] a halogen-containing elastomer, [II] a di- or tri-thiol-s-triazine compound and [III] at least one polycarboxylic acid compound selected from the group consisting of (A) a polycarboxylic acid having at least two carboxyl groups capable of forming an acid anhydride group in the molecule and (B) a halogen-substituted polycarboxylic acid anhydride.

Abstract: Isoindolazines which, in one of their tautomeric structures, have the formula ##STR1## where the rings designated X and T can be substituted andA.sup.1 and A.sup.2 represent the divalent radical of a compound having two replaceable hydrogen atoms on a C or N atom, in particular the divalent radical of an active methylene compound, of an amine, of a hydrazine, of a hydrazide or of a hydrazone,salts and complexes of these compounds, processes for their preparation, and their use as pigments.

Abstract: Polyolefin compositions and articles, especially articles of medical ware, such as polypropylene hypodermic syringes, are made more resistant to the embrittlement which accompanies sterilization by high energy (e.g. gamma) irradiation by the addition to a polyolefin of narrow molecular weight distribution of a heterocyclic hindered amine and, optionally, a liquid modifier.

Abstract: The ultraviolet light stability of polyphenylene ether resins and blends is improved by the addition of small amounts of ortho-hydroxy-substituted alkoxybenzophenones and tetraalkyl dipiperidinyl aliphatic diesters in combination, as described. Plasticized, flame retardant and mineral filled versions are also disclosed.

Abstract: A coating composition in which the binder contains the following:(1) an acrylic polymer having pendent hydroxyl containing ester groups of ester group A of the formula ##STR1## and ester group (B) which is either ##STR2## or wherein R.sup.1 is a saturated hydrocarbon group having 2-4 carbon atoms, R.sup.2 is a tertiary hydrocarbon group having 8 through 10 carbon atoms; and(2) an aliphatic, aromatic or cycloaliphatic polyisocyanate;The composition can be used as an unpigmented clear finish or can contain convention pigments and be used as a colored finish. The composition is useful for refinishing trucks and automobiles and as an original finish for trucks, automobiles, boats, outdoor equipment and the like since the resulting finish in glossy, durable and weatherable.

Abstract: A 2,2,6,6-tetramethyl-4-piperidinyl derivative having a formula comprising: ##STR1## wherein R.sub.1 is hydrogen, an alkyl or alkylene group having 1 to about 8 carbon atoms, or cycloalkyl or aryl groups having about 5 or 6 ring carbon atoms; R.sub.2 and R.sub.3 are individually selected from hydrogen, alkyl groups having 1 to about 8 carbon atoms, and cycloalkyl and aryl groups having about 5 or 6 ring carbon atoms; R.sub.4 is selected from hydrogen and alkyl groups having 1 to about 8 carbon atoms; and n is either 1 or 2.These compounds are useful as UV light stabilizers in plastics and cosmetics (e.g. sunscreens).

Abstract: Polyalkylpiperidinesulfonic acid esters of the formulae I and IIB--X--O--SO.sub.2 --A).sub.m (I)(B'--X--O--SO.sub.2).sub.2 A' (II),in which A, A', B, B', X and m are as defined in claim 1, the polyalkylpiperidine group being present in each of the substituents B and B'. These esters are suitable for use as curing catalysts for acid-curable resins and act therein, at the same time, as light stabilizers.

Abstract: Compounds of the formula I ##STR1## wherein n is 0 or 1, R.sup.1 is hydrogen or C.sub.2 -C.sub.4 alkyl, and R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are monovalent hydrocarbon radicals, are effective light stabilizers for organic polymers, especially for surface-coating resins.

Abstract: Oligomers of 2,2,6,6-tetramethylpiperidinol polycarboxylic acid esters are provided having the formula: ##STR1## wherein: Z is the residue of an aliphatic or aromatic or nitriloaliphatic or hydroxy aliphatic polycarboxylic acid having from three to six carboxylic acid groups and from one to thirty carbon atoms; ##STR2## wherein R.sub.3 is hydrogen, alkyl and hydroxyalkyl having from one to about twenty carbon atoms; cycloalkyl having from six to about twenty carbon atoms; aryl having from six to about twenty carbon atoms; or cycloalkylene with the N in the ring and having from two to five carbon atoms;R is alkylene having from two to about twelve carbon atoms; cycloalkylene having from three to about twelve carbon atoms; phenylene having from six to about twenty carbon atoms; mixed alkylenecycloalkylene or alkylene phenylene or oxyalkylene having from two to about twelve carbon atoms; ##STR3## wherein R.sub.4 is alkyl having from one to about six carbon atoms;R.sub.

Abstract: Polyalkyldiazaspirodecanes which are substituted in the 2-position by functional radicals and have the formula ##STR1## are prepared from polyalkylpiperidine cyanohydrins and ketones which are substituted by functional radicals.The products are suitable for stabilizing organic polymers against photo-oxidative degradation.

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: Polyhydric alcohol ethers of 2,2,6,6-tetramethyl-4-piperidone ketals are provided, having the formula: ##STR1## wherein: R is selected from the group consisting of hydrogen, alkyl having from one to about eight carbon atoms, and alkyleneoxyalkylene, each alkylene having from two to about eight carbon atoms;R.sub.1 is selected from the group consisting of hydrogen and alkyl having from one to about four carbon atoms;R.sub.2 is selected from the group consisting of hydrogen; oxyl O; alkyl, hydroxy alkyl and epoxyalkyl having from one to about eighteen carbon atoms; acyl having from one to about eighteen carbon atoms; cycloalkyl having from three to about eighteen carbon atoms; phenyl; phenalkyl and alkylphenyl having from seven to about twenty-four carbon atoms; andn is a number from 3 to 6as well as synthetic resin compositions having an improved resistance to deterioration and containing such compounds.

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: Amines are reacted with phosphorous trichloride to form N-dichlorophosphinoamines that are then reacted with a bisphenol in about equimolar amounts to provide polyphosphoramidite oligomers. The polyphosphoramidite oligomers are effective as stabilizers for polymers such as polyolefins, and form even more efficient stabilizer combinations with hydroxyphenylalkyleneyl isocyanurates.

Abstract: Disclosed is a new class of polymeric hindered amine light stabilizers based on maleic anhydride modified polyolefins reacted with tetramethyl piperidine derivatives. These materials are more effective than most of the generally used hindered amine light stabilizers, but due to their higher molecular weights and the polyolefin backbone, they are more compatible with polyolefins.

Abstract: The instant invention relates to thermoplastically processable polyamides which are rendered flame retardant by means of a new flame retarding agent; the conversion product of cyanuric acid and triazine compounds having free --NH.sub.2 in a molar ratio of at least 2 triazine nuclei per mole of cyanuric acid. The properties of polyamide thermoplasts are changed only slightly through the incorporation of the new flame retarding agent.

Abstract: Irradiation-sterilizable medical articles molded from a propylene polymer composition in which stabilizers are incorporated. Said composition comprises from 0.01 to 0.4 part by weight of each of a specific hindered amine and a specific phenol or its phosphite ester compound incorporated per 100 parts by weight of a propylene polymer with a weight-average molecular-weight to number-average molecular-weight ratio of 5 or below. The above-mentioned composition may additionally contain a sorbitol derivative as the nucleating agent. Medical articles produced from said composition by molding, for example, syringes are suitable for irradiation sterilization. Said medical articles when irradiated undergo little reduction in quality of the material and are accompanied by little bleeding or degradation of the incorporated stabilizers and nucleating agent.

Abstract: A coating composition in which the binder contains the following:(1) an acrylic polymer having pendent hydroxyl containing ester groups and(2) a polyisocyanate which has the formula ##STR1## where R.sup.4 is a hydrocarbon group having 6 carbon atoms. The composition can be used as an unpigmented clear finish or can contain convention pigments and be used as a colored finish. The composition is useful for refinishing trucks and automobiles and as an original finish for trucks, automobiles, boats, outdoor equipment and the like since the resulting finish is glossy, durable and weatherable.

Abstract: Moulding compositions based on thermoplastic polyesters can be effectively protected against thermal degradation, if they contain, as a first stabilizer, a polyepoxide compound and, as a second stabilizer, a bisoxazoline or a dicarboxylic acid imide or amide.

Abstract: Copolymer light stabilizers are provided having at least one 2,2,6,6-tetraalkyl piperidyl group in the molecule and a molecular weight within the range from about 1000 to about 20,000, that are copolymers of a maleic or fumaric acid ester containing a 2,2,6,6-tetraalkyl piperidyl group in the alcohol group of the formula: ##STR1## wherein ##STR2## R.sub.2 is alkyl or R.sub.1 ; X is ##STR3## R.sub.6 is lower alkyl; R.sub.3 is hydrogen or alkyl;R.sub.4 is hydrogen or methyl;R.sub.5 is alkylene;Y is ##STR4## R.sub.7 is alkylene; and at least one monomer selected from the group consisting of aliphatic carboxylic acid vinyl ester having from two to eight carbon atoms; alkyl vinyl ethers having from one to eighteen carbon atoms; triallyl isocyanurate; pinene; and tricyclo-(5.2.1.0.sup.2.6)-decene-3; and synthetic resin compositions having improved light stability comprising per 100 parts by weight of resin from 0.001 to 5 parts by weight of the polymeric light stabilizer.

Abstract: Polyolefins, in particular polypropylene, are stabilized against UV degradation by a system of ethylene vinyl acetate, containing at least 20% by weight vinyl acetate and one or more of a nickel or zinc-N,N'-dialkyldithiocarbamate or a piperidine derivative such as bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate.

Abstract: Compounds which contain, in their molecule, at least one 2-(2'-hydroxyphenyl)-benztriazole group or one 2-hydroxybenzophenone group and at least one polyalkylpiperidine group are effective light stabilizers for organic materials, in particular for polymers. The use of the compounds as light stabilizers for lacquers is of particular importance.

Abstract: Tetra-2,2,6,6-tetramethyl-4-piperidinyl)-3-methyl-5-(1',2'-biscarboxylate)- ethyl-cyclohexane or 3-cyclohexene-1,2-dicarboxylates are provided having the formula (I) or (II): ##STR1## wherein: R.sub.1 is selected from the group consisting of hydrogen, --O, alkyl, hydroxy alkyl and epoxyalkyl having from one to about eighteen carbon atoms, acyl having from one to about eighteen carbon atoms, cycloalkyl having from three to about eighteen carbon atoms; phenyl; phenalkyl and alkylphenyl having from seven to about twenty-four carbon atoms;R.sub.2 is lower alkyl having from one to about six carbon atoms; andX is selected from the group consisting of: ##STR2## as well as stabilized synthetic resin compositions comprising such piperidinyl compounds.

Abstract: Compounds of the formula (L--T).sub.g --E (I) or (L--T--G) .sub.h --Q (II), where L is a lactam group, T is a substituted 4-piperidinyl hindered amine moiety and E or Q are selected linking or terminal groups, are effective light stabilizers for polyolefins and other organic polymers.

Abstract: Oligomeric alkylenebisphenyl phenylphosphonites, easily prepared by the reaction of phenyldichlorophosphine and certain bis-phenols in the presence of a base, provide enhanced stabilizing activity to hydroxyalkyleneyl isocyanurates when combined to stabilize organic materials subject to degradation. These oligomeric phenylphosphonites are not expensive, resist hydrolysis, do not evaporate from or are leached out of polymers when mixed therewith and provide excellent protection to polymers during processing and result in decreased water carry over of polymer films on leaving a cooling water bath during the film forming process.

Abstract: Poly(piperidylamine) alkanes represented by the Formula (I) or (II): ##STR1## and synthetic resin compositions having improved resistance to deterioration by light containing such compounds.

Abstract: A non-yellowing antioxidant-UV stabilizer combination especially useful in AES polymers comprising(A) at least one antioxidant selected from the group consisting of:(i) a thiodialkylene bis-(3,5-dialkyl-4-hydroxy) hydrocinnamate antioxidant;(ii) An N,N'-alkylene bis-(3,5-dialkyl-4-hydroxy) hydrocinnamamide antioxidant;(iii) an O,O-dialkyl-3,5-dialkyl-4-hydroxybenzyl phosphonate antioxidant;(iv) an oxamidobis alkyl (3,5)-dialkyl-4-hydroxyphenyl) propionate antioxidant; and(v) a [3-(3,5-dialkyl-4-hydroxyphenyl)propionamido]alkyl stearate antioxidant; and(B) a UV stabilizer package comprising:(vi) at least one UV stabilizer of the hindered amine type, with or without(vii) at least one UV absorber.

Abstract: Mixtures of esters of polyalkylpiperidine derivatives, of the formulae I and II ##STR1## in which the proportions of I to II are 95 to 70% by weight and 5 to 30% by weight, are obtained by reacting about 2 mols of a piperidine of the formula III ##STR2## with 0.9 to 1.3 mols of a diester of the formula IV ##STR3## in the melt at between 100.degree. and 145.degree. C., in the presence of an alkali metal amide as a catalyst.The mixtures of esters thus obtained are very suitable as light stabilizers for plastics.

Abstract: Polyethers containing 2,2,6,6-tetramethyl piperidinyl carboxylic acid ester or ether groups are provided, comprising polymeric units having the structure ##STR1## wherein X is selected from the group consisting of: ##STR2## R.sub.1 is selected from the group consisting of hydrogen, --O, alkyl, hydroxy alkyl and epoxyalkyl having from one to about eighteen carbon atoms, acyl having from one to about eighteen carbon atoms, cycloalkyl having from three to about eighteen carbon atoms; phenyl; phenalkyl and alkylphenyl having from seven to about twenty-four carbon atoms;R.sub.2 is hydrogen or hydroxy;n.sub.1 is 0 or 1;R.sub.3 is lower alkyl having from one to about six carbon atoms; andn is the average number of such units in the polymer; as well as stabilized synthetic resin compositions comprising such polyethers.

Abstract: Novel compounds have been discovered in which a bis compound of a polysubstituted 2-keto-1,4-diazacycloalkane ("2KDZC") provides a bridge between diisocyanate groups so as to form an oligomeric 2KDZC-urethane ("2K-U" oligomer) having from 2 to about 15 repeating units. The bis compound bridge itself consists essentially of two distally linked polysubstituted 2KDZC moieties, and the 2K-U oligomer formed consists essentially of two 2KDZC moieties linked through their N.sup.1 atoms, which moieties in turn are distally linked to urethane groups through the N.sup.4 atoms of the 2KDZC. Such 2K-U oligomers unexpectedly contain a self-limiting number of 2K-U repeating units which happens to provide 2K-U oligomers which are desirable and highly effective u-v light stabilizers in organic materials.

Abstract: Various antioxidant-protected polyolefins are protected against initial discoloration from processing, subsequent discoloration, loss of whiteness, and yellowing with time and upon exposure to elevated temperature by addition of various compounds such as triisopropanolamine, bipyridines, and N,N-bis-(2-hydroxymethyl)soyaamine.

Abstract: An additive for coating compositions which is a blend of(A) 20-50% by weight of a polyisocyanate having the formula ##STR1## where R.sup.1 is (CH.sub.2).sub.6' (B) 1-15% by weight of an ester of a polyalkylene glycol alkyl alkylate, an alkyl phthalate or an alkyl aromatic phthalate(C) 1-10% by weight of a blend of ultraviolet light stabilizers and(D) 25-78% by weight of organic solvent; the additive can be added to acrylic lacquers, nitrocellulose lacquers, acrylic-alkyd enamels and acrylic polyurethane enamels to provide flexible finishes for flexible substrates used in automobile and truck bodies.

Abstract: An improved molding composition is provided which exhibits desirable weathering resistance and UV stability comprising an oxymethylene copolymer having at least one chain containing from about 85 to 99.6 mole percent of oxymethylene units interspersed with about 0.4 to 15 mole percent of oxyethylene units, about 0.1 to 1 percent by weight of 1,6-hexamethylene bis-(3,5-di-tert-butyl)-4 hydroxy hydrocinnamate, about 0.015 to 0.4 percent by weight of 2,4,6-triamino-symtriazine, about 0.1 to 0.75 percent by weight of bis(1,2,2,6,6-pentamethyl-4-piperidinyl) ((3,5-bis(1,1-dimethylethyl-4-hydroxyphenol)methyl)) butyl propanedioate and about 0.25 to 1.0 percent by weight of 2-hydroxy-4-n-octoxy-benzophenone.

Abstract: Polymers or oligometic compounds of the general formula ##STR1## in which X, X.sup.a and X.sup.b are an ester, amide or cyano group, Y, Y.sup.a and Y.sup.b are --O-- or --NR.sup.10 --, R.sup.1, R.sup.1a and R.sup.1b are a group which contains a polyalkylpiperidine radical, and R.sup.1a can also be alkyl, and R.sup.3, R.sup.3a and R.sup.3b are alkylene, alkenylene, arylene-dialkylene, cycloalkylene-dialkylene or monooxa-alkylene or polyoxa-alkylene, can be prepared by the polycondensation of malonic acid esters or amides or cyanoacetic acid esters or amides with difunctional compounds, preferably dihalogen compounds, in the presence of bases. The products obtained have a molecular weight of 800 to 20,000 and are outstanding light stabilizers for organic polymers.

Abstract: A process for coloring linear polyesters in the melt in navy blue and dark blue shades, which process comprises using, as colorant, a mixture consisting of 0.2 to 1% by weight of perylenetetracarboxylic acid bis-methylimide, based on the amount of polyester, and a blue polymer-soluble colorant.

Abstract: Use of 2,2,6,6-tetraalkylpiperidine compounds or their acid addition salts or complexes with metal compounds, optionally together with further stabilizers, for stabilizing metallic stoving lacquers based on hot-crosslinkable alkyd or acrylic resins against the action of light, moisture and oxygen.

Abstract: Use of N-substituted 2,2,6,6-tetraalkylpiperadine compounds, their acid addition salts or complexes with metal compounds, optionally together with further stabilizers, for stabilizing acid catalyzed stoving lacquers based on hot crosslinkable acrylic polyester or alkyd resins against the action of light, moisture and oxygen. The combination of an N-substituted 2,2,6,6-tetraalkylpiperidine compound with a UV absorber is particularly effective in stabilizing said lacquers.