PRODUCTION OF HYDROGENATED STYRENIC RESIN

Title:

PRODUCTION OF HYDROGENATED STYRENIC RESIN

Document Type and Number:

Japanese Patent JPH0376706

Kind Code:

A

Abstract:

PURPOSE:To carry out the hydrogenation of a styrenic resin mild conditions to thereby avoid the significant mol.wt. degradation by hydrogenating arom. rings of the styrenic resin in the presence of a palladium catalyst catalyst carried by a specific carrier. CONSTITUTION:A silica carrier having a specific surface area of 100-500m<2>/g and a mean pore diameter of 200-500Angstrom is impregnated with an aq. soln. of palladium salts, and then reduced to give a palladium catalyst carrying 0.001-30wt.% palladium. The resulting catalyst is added to a 5-50wt.% solvent soln. (e.g. a cycloheptane soln.) of a styrenic resin contg. at least 50wt.% styrene in an amt. of the catalyst of 1-100wt.% based on the styrenic resin. Then the soln. is reacted in hydrogen under an atmospheric pressure to 300kg/cm<2> at 0-300 deg.C to hydrogenate atom. rings of the styrenic resin, thus producing a hydrogenated styrenic resin wherein 70% or higher of the arom. rings are hydrogenated.

Inventors:

HARA YOSHINORI
ENDOU HIROYOSHI

Application Number:

JP21471889A

Publication Date:

April 02, 1991

Filing Date:

August 21, 1989

Export Citation:

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Assignee:

MITSUBISHI CHEM IND

International Classes:

C08F8/04; (IPC1-7): C08F8/04

Attorney, Agent or Firm:

Hasegawa Soji

Next Patent: JPH0376707