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. 01, 1982
Filed:
May. 27, 1980
Applicant:
Inventors:
Manuel Slovinsky, Woodridge, IL (US);
Joseph A Maciaszek, Naperville, IL (US);
Assignee:
Nalco Chemical Company, Oak Brook, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B05D / ; B05D / ;
U.S. Cl.
CPC ...
252321 ; 1063 / ; 252358 ; 427220 ; 427386 ;
Abstract
An improved aqueous defoamer composition of the type comprising from 70-90% by weight of a water-insoluble organic liquid, from 0.1 to about 20% of a hydrophobic silica suspended in the organic liquid, and from about 1 to about 20% of an oil-soluble spreading agent, the improvement which comprises utilizing as the hydrophobic silica a silica which has at least a portion of its surface esterified with a fatty epoxide. The invention also contemplates an improved method for hydrophobizing silica particles by reacting them in an organic liquid with a fatty epoxide.