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. 14, 1993
Filed:
Nov. 16, 1990
Applicant:
Inventors:
Nobuyuki Terae, Annaka, JP;
Tadashi Domae, Annaka, JP;
Assignee:
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ; C09K / ;
U.S. Cl.
CPC ...
252358 ; 252321 ;
Abstract
A defoamer composition comprising (A) an organopolysiloxane containing an oxyalkylene group having an appropriate hydrophilic-hydrophobic balance, (B) another organopolysiloxane containing an oxyalkylene group serving as a surface active agent for component (C), (C) a dimethylpolysiloxane for retaining defoaming power, and (D) a silica filler can maintain defoaming power for a long time, for example, when it is added to a developer for exposed photosensitive resin which is subject to shearing stresses in the wash-out step.