Aristech Chemical Corporation

Mitsubishi Chemical Corporation

Hoechst Celanese Corporation

Mark R Rubino

Jeffrey S Salek

Joseph Pugach

Akiyoshi Onishi

Daniel D Lindley

Makoto Terauchi

Huh-Sun Chiou

John R Battler

Edmund P Whitby, Iii

Steve Mulhall

Susan W Jahoda

Copolymers are disclosed of lower alpha-olefins and HALS-containing monomers, typically 1-(10-undecenyl)-2,2,6,6-tetramethylpiperidine. They may be used for light or heat stabilizing, by themselves or in blends with other polymers.

Copolymers of propylene with polymerizable hindered amine light

Fully hindered secondary amines, typically tetramethyl piperidine, are reacted with terminally unsaturated electrophilic compounds having at least five carbon atoms to obtain tertiary hindered amines. The reaction is conducted with an excess of secondary amine, preferably in the presence of a specified solvent such as N-methyl pyrrolidinone.

Method of making teritiary hindered amines

New N-substituted piperidines useful as light stabilizers in synthetic resins are disclosed. They are 1-(2,7-octadienyl)-2,2,6,6-tetraalkylpiperidines wherein the alkyl groups are independently selected lower alkyl groups such as methyl or ethyl and the 3 and 5 positions may be substituted by methyls. The ring may be monounsaturated; a new compound 1-(2,7-octadienyl)-2, 2,6,6-tetramethyl-3-pyridine is described.

Hindered amine light stabilizer

This invention provides a unique method of producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane ('BPTMC'). The disclosed method manufactures BPTMC from ketals and hemithioketals of 3,3,5-trimethylcyclohexanone ('TMC'). The reaction takes place in the presence of an acid catalyst, and optionally added co-catalysts. Additionally, applicants have disclosed a particularly useful method of manufacturing BPTMC from TMC and alcohol and/or thiol starting materials. These starting materials react to form the TMC ketal or thioketal materials. This method is particularly useful in that it allows recovery and recycling of the alcohol and/or thiol.

Method of making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane

A process for making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane via the acid catalyzed reaction of phenol and 3,3,5-trimethylcyclohexanone containing an organic thiol co-catalyst is described wherein the organic thiol is rejuvenated by treatment with a halogen acid and recycled to a fresh mixture of phenol and 3,3,5-trimethylcyclohexanone to make additional 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane.

The present inventon pertains to a process for the preparation of omega-arylalkanoic acids of the genral formula

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Pittsburgh, PA, United States of America

Mark R Rubino