Sumitomo Chemical Company, Limited

Takeo Fujii

Shinichi Yachigo

Tamaki Ishii

Yukoh Takahashi

Masakatsu Yoshimura

Ichiki Takemoto

Haruki Okamura

Hideo Nagasaki

Akira Takeshita

Yuzo Maegawa

Tatsuo Kaneoya

Shinzaburo Masaki

Eizo Okino

Kikumitsu Inoue

Tooru Tokumaru

Masahisa Shionoya

Akira Murakami

Hideyuki Goto

Masahito Umehara

Ritsu Okajima

There is disclosed an imine derivative of the general formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and are hydrogen, C.sub.1 -C.sub.6 alkyl or aryl, with the proviso that R.sup.1 and R.sup.2 are not simultaneously hydrogen; or R.sup.1 and R.sup.2 are joined together to form C.sub.4 -C.sub.6 alkylene. Also disclosed is a process for the production of the imine derivative.

Imine derivatives and process for production thereof

A stabilized resin composition comprising a resin, a piperidine derivative represented by the formula (III) ##STR1## wherein R.sub.1 is a hydrogen atom or an alkyl group having 1 to 3 carbom atoms; R.sub.2 is a hydrogen atom or an alkyl group having from 1 to 2 carbon atoms; and R.sub.3 and R.sub.4 are each independently an alkyl group having 1 to 12 carbon atoms, a phenol-type antioxidant and a sulfur-containing antioxidant. The composition simultaneously meets heat resistance, oxidation resistance and light resistance requirements.

Process for producing piperidine derivative and stabilized resin

Process for producing hydroxy-containing alkylated aromatic compounds by the liquid phase reaction of an aromatic compound having at least one hydroxyl group with an alkylating agent in the presence of a heteropoly acid and water.

Method for producing hydroxy-containing alkylated aromatic compounds

Process for producing 2,2,4-trimethyl-1,2-dihydroquinoline by reacting aniline with an acetone compound at 80.degree.-150.degree. C. in the presence of, as catalyst, both hydrogen fluoride and boron trifluoride.

Process for producing 2,2,4-trimethyl-1,2-dihydroquinoline

There is provided a 2,2,6,6-tetramethylpiperidine derivative represented by the formula (I), ##STR1## wherein R.sub.1 and R.sub.2 independently represent a hydrogen atom or methyl group, and R.sub.3 represents an alkylene group having one to four carbon atoms. A method for producing said derivatives is also provided.

2,2,6,6-Tetramethylpiperidine and its production

There are provided piperidine derivatives having the formula ##STR1## wherein R represents a hydrogen atom or a C.sub.1 -C.sub.3 group, and R.sup.2 and R.sup.3 represent a hydrogen atom or taken together, form ##STR2## There is also provided a method for producing the above compounds which comprises reacting a tricetonamine derivative represented by the formula ##STR3## wherein R has the same meaning as described above, or its salt with sorbitol. The subject piperdine derivatives are useful as stabilizers for preventing the deterioration of polymers by light.

Piperidine derivatives, their production and stabilized polymer

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Toyonaka, Japan

Takeo Fujii