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:
Oct. 05, 2021
Filed:
Jul. 03, 2019
Applicants:
Dow Silicones Corporation, Midland, MI (US);
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
John Roberts, Midland, MI (US);
Matthew Belowich, Midland, MI (US);
Thomas Peterson, Midland, MI (US);
Vladimir Pushkarev, Mount Pleasant, MI (US);
Evelyn Auyeung, Houston, TX (US);
Mark Rickard, Midland, MI (US);
Assignees:
Dow Silicones Corporation, Midland, MI (US);
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 77/08 (2006.01); C08G 77/10 (2006.01); C08G 77/16 (2006.01);
U.S. Cl.
CPC ...
C08G 77/08 (2013.01); C08G 77/10 (2013.01); C08G 77/16 (2013.01);
Abstract
A method for making long chain hydroxyl terminated polydiorganosiloxanes with low cyclics content via condensation polymerization employs a selective catalyst. The catalyst includes a salt-anion complex and a free acid.