Abstract: The invention relates to a novel piperidine compounds which act as light stabilizers, heat stabilizers and oxidation stabilizers for synthetic polymers and have the general formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, A, B, X, Y, a and b are as defined in the specification.The compounds are particularly useful as light stabilizers for polyolefines in the form of fibres or film.

Abstract: Novel piperidine derivatives of macrocyclic triazine compounds of the formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and X are as defined in the description, have been prepared. These compounds possess a light-stabilizing, heat-stabilizing and oxidation-stabilizing activity for synthetic polymers, in particular for hydrocarbon polymers.

Abstract: The invention relates to new piperidine compounds which act as light stabilizers, heat stabilizers and oxidation stabilizers for synthetic polymers, in particular for hydrocarbon polymers. The compounds are piperidinol carbamates of the formula: ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and A have the meanings defined in the description and y is an integer from 1 to 4. In particular, A represents a monovalent to tetravalent radical, always bonded to the carboxy-piperidine radicals via nitrogen atoms.

Abstract: Compounds of the formula ##STR1## in which R.sub.1 is hydrogen, --O, --CN, a linear or branched alkyl radical containing from 1 to 20 carbon atoms, an alkenyl or alkynyl radical containing from 2 to 20 carbon atoms, benzyl which is unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 -alkyl radicals or hydroxybenzyl which is unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 -alkyl radicals; or R.sub.1 is a --COR.sub.14, --COOR.sub.14, --CH.sub.2 COOR.sub.14 or --CONR.sub.14 R.sub.15 radical, in which R.sub.14 and R.sub.15, which may be identical or different, are linear or branched C.sub.1 -C.sub.20 -alkyl, C.sub.2 -C.sub.20 -alkenyl, C.sub.5 -C.sub.12 -cycloalkyl, phenyl which is unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.8 -alkyl radicals, hydroxyphenyl which is unsubstituted or substituted by 1 to 3 C.sub.1 -C.sub.4 -alkyl radicals, C.sub.7 -C.sub.

Abstract: New piperidine compounds of the formula ##STR1## in which the radicals have the meanings indicated in the specification and which are stabilizers against light, heat and oxidation for synthetic polymers.

Abstract: New compounds are disclosed comprised in the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11, R.sub.12 are as defined in the specification and which have been found highly useful as stabilizers for polymers.Also the process for the preparation of the above new compounds is described.

Abstract: A stabilized polyolefine-based polymeric composition is disclosed characterized in that it contains as stabilizer an organic polyamine having the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are equal to or different from each other and are an alkyl group having from 1 to 4 carbon atoms;R.sub.5 is hydrogen or an alkyl group having from 1 to 4 carbon atoms;A is an alkylene group having from 2 to 10 carbon atoms;B is a divalent aliphatic, cycloaliphatic, aromatic or alkylaromatic radical, which can contain hetero atoms such as O, S, N and P either in the chain or as side substituents; andn is a whole number between 2 and 1000. The organic polyamine has an inherent viscosity of between 0.01 and 1 dl/g, and is employed in an amount equal to or less than 5% by weight. The stabilized polymeric composition may be in the form of fibers, filaments, films or other shaped articles. The organic polyamines themselves are novel, as are certain difunctional amine intermediates.