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. 22, 2020
Filed:
Sep. 13, 2019
Applicant:
Ddp Specialty Electronic Materials Us, Inc., Collegeville, PA (US);
Inventors:
John W. Hull, Jr., Midland, MI (US);
Shari Kram, Midland, MI (US);
Michal Elizabeth Porter, Midland, MI (US);
William G. Stobby, Ann Arbor, MI (US);
Assignee:
DDP SPECIALTY ELECTRONIC MATERIALS US, INC., Collegeville, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 9/00 (2006.01); C08C 19/12 (2006.01); C08F 8/20 (2006.01);
U.S. Cl.
CPC ...
C08C 19/12 (2013.01); C08F 8/20 (2013.01); C08J 9/00 (2013.01); C08J 2309/06 (2013.01);
Abstract
Conjugated diene polymers such as a styrene-butadiene copolymer are sequentially brominated by reaction with a quaternary ammonium tribromide or quaternary phosphonium tribromide and halohydrated by reaction with an N-haloimide compound. This produces a brominated and halohydrated polymer with very good thermal stability. The product is useful as a flame retardant in a variety of polymer systems.