Abstract: Acid addition salts of basic polyalkylpiperidine derivatives, which contain a group of the formula I ##STR1## in which R is H or CH.sub.3, and an inorganic or organic acid, and also inner salts of sulfonic acids which contain a group of the formula I, are suitable as curing catalysts for acid-curable stoving lacquers. Their advantage is a long pot life and also an additional light stabilizing action.

Abstract: The invention relates to ester mixtures of polyalkylpiperidine derivatives of the formulae I and II ##STR1## in which R.sub.1 is hydrogen or methyl, R.sub.2 is hydrogen, C.sub.1-12 alkyl, C.sub.3-8 alkenyl, C.sub.7-11 aralkyl, cyanomethyl or C.sub.2-4 acyl, R.sub.3 is C.sub.1-18 alkylene, C.sub.2-18 oxaalkylene, Chd 2-18 thiaalkylene, C.sub.2-18 azaalkylene or C.sub.2-8 alkenylene and R.sub.4 is C.sub.1-4 alkyl. These mixtures are suitable as stabilizers for plastics.

Abstract: Malonates of the formula I ##STR1## in which R.sub.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sub.2 is C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.4 -alkenyl, benzyl or phenyl which is optionally substituted by C.sub.1 -C.sub.8 -alkyl or C.sub.1 -C.sub.8 -alkoxy, or is cyano, R.sub.3 is C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.4 -alkenyl or benzyl and X denotes hydrogen, oxyl, C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.4 -alkinyl, C.sub.2 -C.sub.21 -alkoxyalkyl, C.sub.7 -C.sub.8 -aralkyl, 2,3-epoxypropyl, an aliphatic acyl group with 1-4 C atoms or one of the groups --CH.sub.2 COOR.sub.4, --CH.sub.2 -CH(R.sub.5)--OR.sub.6, --COOR.sub.7 or --CONHR.sub.7, in which R.sub.4 is C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.6 -alkenyl, phenyl, C.sub.7 -C.sub.8 -aralkyl or cyclohexyl and R.sub.5 is hydrogen, methyl or phenyl and R.sub.

Abstract: 2,2,6,6-Tetramethylpiperidine derivatives of the formula: ##STR1## wherein m is 0, 1 or 2, R.sub.1 is hydrogen, methyl, ethyl, phenoxymethyl or phenyl and R.sub.2 is C1-C8 alkyl, are excellent stabilizers for synthetic polymers.

Abstract: Novel polyalkylpiperidine derivatives of s-triazines of the formula ##STR1## in which X and X' are a divalent organic radical, X", X.sub.1 and X.sub.2 are a direct bond or a divalent organic radical, Y, Y', Y", Y.sub.1, Y.sub.2, Z and Z' are --O--, --S--, --NH-- or --NR.sup.3 --, R is H or CH.sub.3 and R.sup.1, R.sup.2 and R.sup.3 are a monovalent organic radical or a polyalkylpiperidine group, or the group R.sup.1 --X"--Y"-- is chlorine, and R.sup.4 is H, O, alkyl, allyl or benzyl, are valuable stabilizers for polymeric materials, in particular to protect them against photochemical degradation. The derivatives are prepared by stepwise reaction of cyanuric chloride with the corresponding YH, Y'H and Y"H compounds.If 2 or 3 of these components are identical, the corresponding symmetrically substituted triazine compounds, which are preferred, are formed.

Abstract: Condensation polymers or addition polymers which contain sterically hindered polyalkylpiperidine groups are proposed as light stabilizers for plastics. The polymers concerned are relatively low-molecular polymers and a difunctional derivatives of a polyalkylpiperidine is additionally used for the manufacture of these. The piperidine radical can be present in the main chain or as a side group of the polymeric stabilizer. Polymeric stabilizers of this type do not tend to migrate out of the plastic or to be removed by extraction; they are therefore very permanent in use.

Abstract: Polyalkylpiperidine derivatives which are unsubstituted in the 1-position of the piperidine ring and in the 4-position are bonded through a heteroatom bridge to an s-triazine radical, can be converted by reaction with a dihalide or a di-, tri- or tetraepoxide into compounds of the formula I ##STR1## wherein n is 2, 3 or 4 and p is 0 or 1. Polymer or oligomer compounds of the formula II ##STR2## wherein n represents the degree of polymerization and E and E' represent end groups, are obtained by reacting a triazine derivative which contains at least two polyalkylpiperidine substituents with dihalides or diepoxides.Both types of compound are stabilizers for polymers, especially against damage by light. They are distinguished by low volatility and a low tendency to migrate, so that they are of special interest for use in thin polymer layers, for example in fibres, sheets or coatings.

Abstract: Malonates of the formula I ##STR1## in which R.sub.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sub.2 is C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.4 -alkenyl, benzyl or phenyl which is optionally substituted by C.sub.1 -C.sub.8 -alkyl or C.sub.1 -C.sub.8 -alkoxy, or is cyano, R.sub.3 is C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.4 -alkenyl or benzyl and X denotes hydrogen, oxyl, C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.4 -alkinyl, C.sub.2 -C.sub.21 -alkoxyalkyl, C.sub.7 -C.sub.8 -aralkyl, 2,3-epoxypropyl, an aliphatic acyl group with 1-4 C atoms or one of the groups --CH.sub.2 COOR.sub.4, --CH.sub.2 --CH(R.sub.5)--OR.sub.6, --COOR.sub.7 or --CONHR.sub.7, in which R.sub.4 is C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.6 -alkenyl, phenyl, C.sub.7 -C.sub.8 -aralkyl or cyclohexyl and R.sub.5 is hydrogen, methyl or phenyl and R.sub.

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: Novel polyalkylpiperidine derivatives of s-triazines of the formula ##STR1## in which X and X' are a divalent organic radical, X", X.sub.1 and X.sub.2 are a direct bond or a divalent organic radical, Y, Y', Y", Y.sub.1, Y.sub.2, Z and Z' are --O--, --S--, --NH-- or --NR.sup.3 --, R is H or CH.sub.3 and R.sup.1, R.sup.2 and R.sup.3 are a monovalent organic radical or a polyalkylpiperidine group, or the group R.sup.1 --X"--Y"-- is chlorine, and R.sup.4 is H, O, alkyl, allyl or benzyl, are valuable stabilizers for polymeric materials, in particular to protect them against photochemical degradation. The derivatives are prepared by stepwise reaction of cyanuric chloride with the corresponding YH, Y'H and Y"H compounds.If 2 or 3 of these components are identical, the corresponding symmetrically substituted triazine compounds, which are preferred, are formed.

Abstract: Condensation polymers or addition polymers which contain sterically hindered polyalkylpiperidine groups are proposed as light stabilizers for plastics. The polymers concerned are relatively low-molecular polymers and a difunctional derivative of a polyalkylpiperidine is additionally used for the manufacture of these. The piperidine radical can be present in the main chain or as a side group of the polymeric stabilizer. Polymeric stabilizers of this type do not tend to migrate out of the plastic or to be removed by extraction; they are therefore very permanent in use.

Abstract: Condensation polymers or addition polymers which contain sterically hindered polyalkylpiperidine groups are proposed as light stabilizers for plastics. The polymers concerned are relatively low-molecular polymers and a difunctional derivative of a polyalkylpiperidine is additionally used for the manufacture of these. The piperidine radical can be present in the main chain or as a side group of the polymeric stabilizer. Polymeric stabilizers of this type do not tend to migrate out of the plastic or to be removed by extraction; they are therefore very permanent in use.

Abstract: Mixtures of a polymer which contains polyalkylpiperidines chemically bonded in any form and a metal compound MeL.sub.w, in which Me is a divalent or trivalent metal ion or a divalent oxo-metal ion or a divalent dialkyl-tin ion, L is the monovalent anion of a carboxylic acid, of a phosphinic acid or of a phosphonic acid monoester or of an enol and w is 2 or 3, are effective light stabilizers for plastics. The piperidine-containing polymers can be, for example, polyesters, polyamides, polyamines, polyaminotriazines or poly(meth)-acrylates. Examples of metal compounds MeL.sub.w are nickel oenanthate or nickel acetylacetonate. Plastics to be stabilized are in particular the polyolefins.

Abstract: Condensation polymers or addition polymers which contain sterically hindered polyalkylpiperidine groups are proposed as light stabilizers for plastics. The polymers concerned are relatively low-molecular polymers and a difunctional derivative of a polyalkylpiperidine is additionally used for the manufacture of these. The piperidine radical can be present in the main chain or as a side group of the polymeric stabilizer. Polymeric stabilizers of this type do not tend to migrate out of the plastic or to be removed by extraction; they are therefore very permanent in use.

Abstract: Malonic acid derivatives of the formula ##STR1## wherein Z contain sterically hindered piperidines as stabilizers against light-induced degradation for organic material.

Abstract: s-Triazine derivatives which contain, as substituents in the 2-, 4- and 6-position, at least one polyalkylpiperidine radical and at least one N-methylolamino group or an ether thereof, are effective stabilisers for plastics, in particular against light degradation. By virtue of their N-methylol group, they are able to enter into a chemical bond with many plastics and this renders them stable to migration and elution.

Abstract: Condensation polymers or addition polymers which contain sterically hindered polyalkylpiperidine groups are proposed as light stabilizers for plastics. The polymers concerned are relatively low-molecular polymers and a difunctional derivative of a polyalkylpiperidine is additionally used for the manufacture of these. The piperidine radical can be present in the main chain or as a side group of the polymeric stabilizer. Polymeric stabilizers of this type do not tend to migrate out of the plastic or to be removed by extraction; they are therefore very permanent in use.

Abstract: Nickel complexes containing ortho- or para-hydroxybenzoate anions and a non-ionic amine ligand are valuable light-stabilizers for polymers, particularly for polyolefins. The complexes may also contain a second carboxylate anion, different from the benzoate anion, and in this case also the amine-free nickel compounds show a high stabilizing action.

Abstract: Condensation polymers or addition polymers which contain sterically hindered polyalkylpiperidine groups are proposed as light stabilizers for plastics. The polymers concerned are relatively low-molecular polymers and a difunctional derivative of a polyalkylpiperidine is additionally used for themanufacture of these. The piperidine radical can be present in the main chain or as a side group of the polymeric stabilizer. Polymeric stabilizers of this type do not tend to migrate out of the plastic or to be removed by extraction; they are therefore very permanent in use.

Abstract: Blocking of the end groups of condensation and addition polymers which can be used as light stabilizers and in which the recurring structural unit contains a polyalkylpiperidine residue of the formula ##STR1## or is substituted by a polyalkylpiperidine side group of the formula ##STR2## in which R is hydrogen or alkyl having 1-5 C atoms and R' is hydrogen, alkyl having 1-12 C atoms, alkeny having 3-8 C atoms, alkynyl having 3-6 C atoms, aralkyl having 7-12 C atoms, alkanoyl having 1-8 C atoms or alkenoyl having 3-5 C atoms, is effected by adding a monofunctional compound during the preparation of the polymers, or by reacting the polymer, after it has been prepared, with a monofunctional compound. Examples of monofunctional compounds are monocarboxylic acids, monoalcohols, monoamines or monoisocyanates. The polymeric light stabilizers become more stable as a result of the blocking of the end groups.