Abstract: Compounds of formula ##STR1## wherein R, L, X and Y are as defined in claim 1, are very suitable for use as UV absorbers in pressure-sensitive or heat-sensitive recording materials.

Abstract: A photographic material is described which comprises, on a base, blue-sensitive, green-sensitive and/or red-sensitive silver-halide emulsion layers and, if desired, a protection layer, a layer containing a UV absorber being arranged between the uppermost silver-halide emulsion layer and the protection layer, or on top of the uppermost silver-halide emulsion layer, wherein the UV absorber conforms to the formula ##STR1## in which the radicals E.sub.1, E.sub.2 and E.sub.3 are independently alkyl, substituted alkyl, alkenyl, glycidyl, cycloalkyl, phenylalkyl or siloxyl.

Abstract: 2-(2-Hydroxyphenyl)-4,6-diphenyl- and -4,6-di-p-tolyl-1,3,5-triazines are particularly suitable stabilizers, especially against light-induced degradation, for coating materials. They are superior in this respect to the corresponding 4,6-bis(2,4 -dimethylphenyl) derivatives.

Abstract: Hydroxyphenyltriazines of formula I ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.6 alkyl substituted by halogen or by C.sub.1 -C.sub.12 alkoxy, or is benzyl and R' is hydrogen or methyl, are especially suitable as stabilisers for thermoplastic polymers that comprise hetero atoms in the main chain.

Abstract: Light-stabilized polymer microparticles, which contain at least one light stabilizer, and processes for the preparation of these microparticles by polymerization of suitable monomers, at least a part of the polymerization being carried out in the presence of at least one light stabilizer, are described. The polymer microparticles can be used in coating compositions which comprise a disperse phase containing these particles and a liquid continuous phase.Coatings and finishes based on the compositions according to the invention are distinguished by improved weathering resistance, in particular by a high light stability.

Abstract: Polyolefins and olefin copolymers which are prepared by polymerization on a catalyst made from a magnesium halide, a titanium compound and an aluminium alkyl can be stabilized by the addition of certain sterically hindered triazinylpiperidines, which are substituted in the 1-position, to the polymerization.

Abstract: Compounds which comprise at least one group of the formula I or II ##STR1## and at least one polyalkylpiperidine group of the formula III ##STR2## in which R and R.sub.1 to R.sub.6 have the meaning indicated in claim 1, are effective stabilisers for organic materials against damage by light, oxygen and heat.

Abstract: The stabilized binder is a mixture of two copolymers and at least one curing agent. The one copolymer contains fluorine or silicon and a UV absorber in copolymierized form. The other copolymer is an acrylic resin. Suitalbe curing agents are melamine resins or polyisocyanates.

Abstract: o-Hydroxyohenyl-s-triazines containing suitable functional groups are incorporated in polymers by copolymerisation, copolycondensation, copolyaddition or by polymer-analogous reaction. The modified polymers so obtained have excellent stability to degradation induced by light, oxygen and heat. They can also be used as stabilisers.

Abstract: 2-(2-Hydroxyphenyl)-4,6-diaryl-1,3,5-triazines, which carry in the 4-position of the 2-hydroxyphenyl radical a silyl group linked through oxygen to the phenyl nucleus, as well as condensation products whose ##STR1## units contain 2-(2-hydroxyphenyl)-4,6-diaryl-1,3,5-triazines in the side-chain, are UV absorbers which are suitable for use as stabilizers for organic polymers.

Abstract: Copolymers of styrene or a-methylstyrene and at least one comonomer, containing crosslinked elastomer particles, can be light-stabilized by modifying the elastomer particles by copolymerization with a suitable derivative of a sterically hindered amine. The modification is preferably carried out by graft polymerization, the elastomer used preferably being polybutadiene.

Abstract: Compounds which contain at least one group of the formula I ##STR1## in which X is a group which completes the ring to form a piperidine ring, are effective stabilizers for organic materials against damage by light, oxygen and heat.

Abstract: N-Triazinyloxalamides of formula I ##STR1## wherein n is 1-4 and R.sup.1, R.sup.6 and X are as defined in claim 1, are UV absorbers and are suitable as light stabilizers for organic materials.

Abstract: The novel UV-absorbers are compounds of the formula ##STR1## in which R.sup.1 is, for example, hydrogen, n is one of the numbers 1 or 2 and R.sup.2 is an appropriate monovalent or divalent radical, for example --OH or --O-CH.sub.2 CH.sub.2 --O--. The UV-absorbers are used in particular for stabilising and improving lacquers and photographic material.

Abstract: Blocked benzotriazoles of the formula I or II ##STR1## wherein x is 1 or 2, R.sup.1 in the case of x=1 and in the formula II is an acyl group of the formula --CO--R.sup.5, a sulfonyl group of the formula --SO.sub.2 --R.sup.6, a phosphoryl group of the formula --P(O).sub.r (R.sup.14)(R.sup.15), and in the case of x=2 is --CO-- or a diacyl group of the formula --CO--CO-- or --CO--R.sup.7 --CO--, and R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.14 and R.sup.15 have the meanings defined in claim 1, are crypto light stabilizers which can be activated by short-wave irradiation. Their use in coating materials is of interest in cases in which light stabilizers containing the free OH compounds have disadvantages with regard to their application.

Abstract: Benzotriazoles of the formula I ##STR1## in which R.sup.1 and R.sup.2 are located in the ortho-position or para-position relative to the OH group and at least one of these substituents in an .alpha.-branched alkyl group containing a polar group M in the .omega.-position are liquid or low-melting compounds which absorb UV light and can be used as stabilizers for organic materials. M can be, for example, an ester or amide group. R.sup.3 can be H, Cl, alkyl, alkoxy or a carboxyl group.

Abstract: The novel UV-absorbers are compounds of the formula I ##STR1## in which R.sup.1 is, for example, hydrogen, n is one of the numbers 1 or 2 and R.sup.2 is an appropriate monovalent or divalent radical, for example --OH or --O--CH.sub.2 CH.sub.2 --O--. The UV-absorbers are used in particular for stabilising and improving lacquers and photographic material.

Abstract: Sterically hindered cyclic amines which are substituted by a photoactivatable acyl group at the basic nitrogen atom can be deacylated by irradiation with UV light. This is advantageous if the basicity of the amines proves troublesome during application. Examples of such photoactivatable acyl groups are phenylglyoxyl, phenylacetyl or naphthylacetyl groups.

Abstract: Compounds of formula I ##STR1## wherein R is hydrogen, methyl or cyano, and R' is hydrogen, C.sub.1 -C.sub.8 alkyl or phenyl, are suitable for copolymerization with ethylenically unsaturated monomers to form crosslinked copolymers which are stabilized against light.

Abstract: Sterically hindered cyclic amines which are substituted by a photoactivatable acyl group at the basic nitrogen atom can be deacylated by irradiation with UV light. This is advantageous if the basicity of the amines proves troublesome during application. Examples of such photoactivatable acyl groups are phenylglyoxyl, phenylacetyl or naphthylacetyl groups.