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:
Jan. 10, 2017
Filed:
Mar. 28, 2013
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Yuji Ando, Annaka, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Abstract
An organopolysiloxane emulsion composition produced by the emulsion polymerization of an emulsion that comprises (A) an organopolysiloxane containing a silanol group or an organooxy group, (B) a nonionic surfactant represented by formula (2): RO(EO)(PO)R(wherein Rrepresents an alkyl group or R(CO)—; Rrepresents an alkyl group; Rrepresents an alkyl group or R(CO)—; Rrepresents an alkyl group; EO represents an ethylene oxide group; PO represents an alkylene oxide group; and a and b independently represent 0 to 100, wherein a+b>0 and the sequence of EO and PO may be random or in the form of a block) and (C) a surfactant other than the component (B), and may additionally comprise (D) a polymerization catalyst and (E) water if required. According to the present invention, it becomes possible to produce an extremely stable organopolysiloxane emulsion composition without inhibiting polymerization during the emulsion polymerization of an organopolysiloxane having condensation reactivity. Further, it also becomes possible to reduce the amount of octamethylcyclotetrasiloxane produced during the emulsion polymerization.