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:
Sep. 19, 2017
Filed:
Mar. 04, 2016
Applicant:
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 77/06 (2006.01); C08G 77/16 (2006.01); C08L 83/04 (2006.01);
U.S. Cl.
CPC ...
C08G 77/06 (2013.01); C08G 77/16 (2013.01); C08L 83/04 (2013.01); C08L 2201/52 (2013.01);
Abstract
An organopolysiloxane emulsion composition having good age stability is prepared by (I) emulsifying a mixture comprising (A) an organopolysiloxane of formula: HO(RSiO)H, (B) a surfactant and (C-1) water to form a first emulsion composition and (II) effecting emulsion polymerization of the first emulsion composition in the presence of (D) an acid catalyst below 40° C. The target emulsion composition contains an organopolysiloxane product having a viscosity≧300,000 mPa·s at 25° C. and an octamethylcyclotetrasiloxane content≦3,000 ppm, and has an emulsified particle size≦500 nm.