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. 30, 2025
Filed:
Jun. 13, 2019
Applicant:
W.r. Grace & Co.-conn., Columbia, MD (US);
Inventor:
Feng Gu, Columbia, MD (US);
Assignee:
W.R. Grace & Co.-Conn., Columbia, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 19/04 (2006.01); C09C 1/30 (2006.01); C09D 7/40 (2018.01); C09D 7/62 (2018.01); C08K 3/36 (2006.01); C08K 9/06 (2006.01);
U.S. Cl.
CPC ...
B01D 19/0409 (2013.01); C09C 1/3018 (2013.01); C09C 1/3081 (2013.01); C09C 1/309 (2013.01); C09D 7/62 (2018.01); C09D 7/69 (2018.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01); C08K 3/36 (2013.01); C08K 9/06 (2013.01); C08K 2201/005 (2013.01); C08K 2201/006 (2013.01);
Abstract
This invention relates to a defoamer active. The defoamer active may include hydrophobized silica particles obtained by treating silica particles with a hydrophobilizing agent. The silica particles may have a BET surface of less than about 150 m/g, a surface pH of at least about 10, and a median particle size ranging from about 2 μm to about 50 μm. The carbon content of the hydrophobized silica particles may not be more than 3%.