Sankyo Company, Limited

Ciba-geigy Corporation

Monsanto Kasei Company

Tomoyuki Kurumada

Takao Yoshioka

Syoji Morimura

Keisuke Murayama

Nobuo Soma

Toshimasa Toda

Katsuaki Matsui

Eiko Mori

Susumu Higashida

Hideo Horiuchi

Noriyuki Ohta

Jean Rody

Heimo Brunetti

Hisayou Ohsawa

Hisayou Osawa

Noriyuki Ohata

Hisayu Ohsawa

Mitsuo Yamazaki

Takaaki Yamazaki

Satoru Naito

Hiromi Tomono

Hisayu Osawa

Ryuichi Hasegawa

Noriyuki Onta

Ichiro Watanabe

Kohtaro Kanetaki

Keisuku Murayama

Syoji Moriyama

Syoji Moromura

Eiici Kitazawa

Kazou Hasegawa

Compounds of formula (I): ##STR1## wherein: R.sup.1 represents an alkyl group having from 1 to 6 carbon atoms;

Phenylalkanoic acid esters and their use as antioxidants

The present invention relates to weather resistant resin compositions consisting essentially of at least one polymeric substance and comprising discoloration effective amounts of:

Resistant resin compositions

The compounds of formula (I): ##STR1## [in which: R.sup.1 and R.sup.2 are the same or different and each represents hydrogen or C.sub.1 -C.sub.5 alkyl;

Thiazolidine derivatives, their preparation and compositions containing

Bis(piperidylaminotriazylamino)-(piperidylaminotriazylaminomethyl)-octane derivatives are novel compounds which are valuable as stabilizers for synthetic polymers.

Tris(piperidylaminotriazylamino) compounds, their preparation and their

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

Piperidine derivatives in which two or three piperidine residues each substituted at the 2- and the 6-position by two methyl groups or by one methyl group and one ethyl group, the piperidine residues being attached by means of substituted alkylene groups, by means of polyoxyalkylene groups (whose oxyalkylene chain is optionally interrupted by one or more phenylene or cyclohexylene groups), by means of substituted isocyanurate groups or by means of glyceryl groups, and acid addition salts thereof are valuable as stabilizers for synthetic polymers.

Piperidine derivatives and their use as polymer stabilizers

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.

Derivatives of sterically hindered 4-aminopiperidines are effective as light-stabilizers for organic polymers, especially for polyolefins. The piperidine ring is substituted with at least five alkyl groups, preferably methyl and ethyl groups. The 4-amino group is substituted with mono- or divalent acyl groups. The nitrogen in 1-position may also be substituted with a monovalent organic substituent. The compounds can be synthesized starting from higher homologs of acetone in sequence of several reaction steps.

Derivatives of 4-aminopiperidine as stabilizers for polymers

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.

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Tokyo, Japan

Tomoyuki Kurumada