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.:
Date of Patent:
Mar. 14, 2000
Filed:
Apr. 06, 1998
Applicant:
Inventors:
Ryuichi Saito, Ibaraki-ken, JP;
Tadashi Amano, Ibaraki-ken, JP;
Assignee:
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526228 ;
Abstract
Suspension polymerization of vinyl chloride in an aqueous medium is carried out in the presence of an oil-soluble polymerization initiator which is a combination of diacylperoxide compound and t-hexylperoxy diglycolate, the former having a half-life period of 10 hours at 30 to 50.degree. C. in benzene (0.05 mol/L). The resulting polymer gives a high-quality molded product which is free of odor and less liable to initial discoloration.