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:
Jun. 29, 1999
Filed:
Jun. 26, 1998
Akinari Itagaki, Gunma-ken, JP;
Satoshi Kuwata, Gunma-ken, JP;
Shin-Etsu Chemical Co., Ltd., , JP;
Abstract
Provided by the invention is a silicone-based oil compound as a base of a defoaming agent of, for example, an emulsion type in an aqueous medium containing a surface active agent capable of exhibiting excellent sustainability of the defoaming activity and stability against dilution. The oil compound comprises (A) from 30 to 98.9% by weight of an .alpha.,.omega.-dihydroxy dimethyl polysiloxane, (B) from 0.1 to 20% by weight of a poly(methyl hydroxy siloxane, such as 1,1,1,3,5,7,7,7-octamethyl-3,5-dihydroxy tetrasiloxane and (C) from 1 to 50% by weight of a finely divided silica powder having a specific surface area of at least 100 m.sup.2 /g.