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:
Jul. 28, 2026
Filed:
Jun. 22, 2022
Applicant:
Entegris, Inc., Billerica, MA (US);
Inventors:
Mei Feng He, Hangzhou, CN;
Dongzhu Wu, Hangzhou, CN;
Yunjia Xia, Hangzhou, CN;
Kwok-Shun Cheng, Nashua, NH (US);
Assignee:
Entegris, Inc., Billerica, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 214/18 (2006.01); B01D 67/00 (2006.01); C08F 218/08 (2006.01); C08F 220/14 (2006.01); C08F 220/18 (2006.01); C08K 5/14 (2006.01);
U.S. Cl.
CPC ...
C08F 214/182 (2013.01); B01D 67/0088 (2013.01); C08F 220/1804 (2020.02); C08K 5/14 (2013.01); B01D 2239/0478 (2013.01); C08F 218/08 (2013.01); C08F 220/14 (2013.01);
Abstract
The disclosure provides an improved process for preparing oleophobic fluoropolymers. The resulting fluropolymers were found to be effective in imparting hydrophobic and oleophobic properties to porous polymeric membranes such as PTFE. The treated PTFE membrane can reach an oleophobic level of 6 or above, (according to the AATCC-118-1997 oil repellency test method) with a low air flux loss.