Sankyo Company, Limited

Ciba-geigy Corporation

Syoji Morimura

Takao Yoshioka

Tomoyuki Kurumada

Keisuke Murayama

Toshimasa Toda

Eiko Mori

Nobuo Soma

Hideo Horiuchi

Katsuaki Matsui

Susumu Higashida

Noriyuki Ohta

Hisayou Ohsawa

Hisayou Osawa

Noriyuki Ohata

Polymers containing polyalkylpiperidines, preparation and use thereof as stabilizers for synthetic polymer compositions are described. In said polymer, sterically hindered polyalkylpiperidines are laterally linked to the main chain. The polymers are distinguished by an improved stabilizing effect in various synthetic polymer compositions, such as polyolefins, against light- and/or heat-induced deterioration thereof. The polyalkylpiperidine-containing polymers of the invention are hardly volatile upon heat-processing or during storage of shaped articles containing said polymers, and are resistant to extraction with solvents.

Polyalkylpiperdine side chain stabilizers for synthetic polymer

Novel triazine derivatives represented by the general formula (I) and use thereof as light stabilizers for synthetic polymers are described. ##STR1## The compounds are distinguished by an improved stabilizing effect in various synthetic polymer compositions, such as polyolefins, against light- and/or heat-induced deterioration thereof, low volatility upon heat-processing or during storage of shaped articles containing the compounds, and resistance to extraction with water and solvents.

Triazine derivatives

The invention entitled 'Polymers containing polyalkylpiperidines and use thereof as stabilizers' provides a class of polymers in which groups containing sterically hindered polyalkylpiperidines are linked in the main chain of the polymers via bridging members containing 2-hydroxy-1,3-trimethylene groups. The polymers show superior stabilizing effects for various synthetic polymers such as polyolefins against degradation thereof induced by light and/or heat. The polymers have advantages, as compared with known stabilizer compounds, that they hardly volatile upon processing with heating or during storage of articles containing thereof, and that they are resistant to extraction with solvents from articles containing thereof.

Polymers containing polyalkylpiperidines and use thereof as stabilizers

Piperidine derivatives having the formula ##STR1## wherein R' represents an alkyl, an acyl, an alkoxycarbonyl, an amino or nitroso group;

Piperidine derivatives

2,2,6,6-Tetramethylpiperidine derivatives having the formula ##STR1## wherein: X represents a group of formula ##STR2## R represents a hydrogen atom, methyl group, ethyl group, phenoxymethyl group or phenyl group;

2,2,6,6-Tetramethylpiperidine derivatives

Novel piperidine-spiro-hydantoin derivatives represented by the general formula (I) and use thereof as light stabilizers for synthetic polymers are described: ##STR1## The compounds are distinguished by an improved stabilizing effect in various synthetic polymer compositions, such as polyolefins, against light- and/or heat-induced deterioration thereof, small volatility upon heat-processing or during storage of shaped articles containing the compounds, and resistance to extraction with water and solvents.

Piperidine-spiro-hydantoin derivatives and their use as polymer

A novel piperidine derivative having a stabilizing effect on a synthetic polymeric material and a composition comprising said piperidine derivative and a synthetic polymeric material.

New polyalkylated 4-aminopiperidine derivatives contain in their molecule two or three piperidine rings, each having two alkyl substituents at both the 2- and the 6- positions, optionally having substituents at the 1- and 3- positions and having an amino substituent at the 4- position. The piperidine rings are joined together by attachment of the 4-amino substituents through, where there are two piperidine rings, a polyalkylene, polyether or polyester chain, or through, where there are three piperidine rings, an isocyanurate or glycerol system. These compounds and their acid addition salts are useful as stabilizers for synthetic polymers.

Polyalkylated 4-aminopiperidine derivatives

Hydantoin derivatives in which two or three piperidine spiro hydantoin residues are attached by means of substituted alkylene groups or polyoxyalkylene groups whose oxyalkylene chain is optionally interrupted by one or more phenylene or cyclohexylene groups or by means of substituted isocyanurate or glyceryl groups and, where they exist, acid addition salts thereof, are valuable as stabilizers for synthetic polymers.

Hydantoin derivatives and their use as polymer stabilizers

Novel derivatives of 4-amino-2,6-dimethylpiperidine have additional methyl or substituted-methyl substituents at positions 2 and 6, and a carboxylate ester substituent at position 4. Positions 1 and 3, and the amino group at position 4, can optionally also be substituted. These derivatives are useful for stabilizing synthetic polymers, especially polyolefins, polyamides and polyurethanes, against photo- and thermal-deterioration, generally in an amount of 0.01 - 5.0% by weight based on the polymer.

Synthetic polymer stabilizers

A synthetic polymer composition stabilized against photo- and thermal-deterioration comprising a stabilizing amount of a compound having the formula ##STR1## wherein R' represents an alkyl, an acyl, an alkoxycarbonyl, an amino or nitroso group;

Polymer compositions containing piperidine derivatives as stabilizers

A synthetic polymer composition stabilized against photo- and thermal deterioration thereof wherein there is incorporated, in a sufficient amount to prevent such deterioration, bipiperidyl derivatives.

Stabilization of synthetic polymers

New 2,2',6,6'-tetraalkyl-2,2',6,6'-tetramethyl-4,4'-bipiperidylidene derivatives, which are optionally substituted in the 1,1',3,3',5, and 5' positions are useful as stabilizers of organic substrates, particularly synthetic polymers, against photo- and thermal-deterioration. They may be prepared by condensing a corresponding 2,6-dialkyl-2,6-dimethyl-4-piperidone and then optionally introducing the desired substituents at the 1- and 1'-positions in the resulting bipiperidylidene derivative.

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Tokyo, Japan

Syoji Morimura