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. 17, 2025
Filed:
May. 02, 2023
Applicant:
Dow Silicones Corporation, Midland, MI (US);
Inventors:
James Andrew Kenney, Midland, MI (US);
Timothy J. Gallagher, Midland, MI (US);
Phillip Griffith, Midland, MI (US);
Assignee:
Dow Silicones Corporation, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 77/06 (2006.01); B29B 7/00 (2006.01); B29B 7/48 (2006.01); B29B 7/58 (2006.01); C08G 77/08 (2006.01); C08G 77/16 (2006.01); B29K 83/00 (2006.01);
U.S. Cl.
CPC ...
C08G 77/06 (2013.01); B29B 7/007 (2013.01); B29B 7/48 (2013.01); B29B 7/582 (2013.01); C08G 77/08 (2013.01); C08G 77/16 (2013.01); B29K 2083/00 (2013.01);
Abstract
An improved process for the preparation of high viscosity (i.e., greater than 1 million mPa·s at 25° C.) silanol-terminated silicone polymers and copolymers, often referred to in the industry as silanol-terminated silicone polymer gums. The silanol-terminated silicone polymer gums are made by the ring-opening polymerisation of organocyclosiloxane oligomers (alternatively referred to as cyclic siloxane oligomers) using a conical screw dump extruder (). It also relates to silanol-terminated silicone polymer gums made by the process.