The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 3979482 B1

Date of Patent:

Sep. 07, 1976

Filed:

Nov. 29, 1974

Process for the degradation of high polymer substances

Applicant:

Inventors:

Tsutomu Kagiya, Kyoto, JA;

Kunihiko Miyoshi, Takatsuki, JA;

Katsuo Takemoto, Kyoto, JA;

Assignees:

Other;

Shinetsu Chemical Company, Tokyo, JA;

Tekkosha Co., Ltd., Tokyo, JA;

Attorney:

Woodhams, Blanchard and Flynn

Primary Examiner:

Eugene C Rzucidlo

Int. Cl.

CPC ...

C08J / ;

U.S. Cl.

CPC ...

2608 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260898 ; 260899 ; 260D / ;

Abstract

The oxidation of a high polymer such as polyvinyl chloride or polyolefin, which oxidation causes cleavages of carbon-carbon bonds in the main chains thereof to degrade the high polymer into lower molecular weight compounds, is remarkably accelerated when the high polymer is impregnated with a halogenated compound having a carbonyl group or carbonyl groups and exposed to sunlight or is irradiated with ultraviolet radiation in an ambient atmosphere of oxygen or a gas containing oxygen. This acceleration of the oxidation makes possible easy destruction of a shaped article made of such a high polymer.

Find Patent Forward Citations