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. 19, 2023
Filed:
Dec. 13, 2019
Kraton Polymers Llc, Houston, TX (US);
Xavier Daniel Muyldermans, Mont Saint Guibert, BE;
Marianne Stol, Amsterdam, NL;
Martine Dupont, Mont Saint Guibert, BE;
Koen Van Duin, Amsterdam, NL;
KRATON CORPORATION, Houston, TX (US);
Abstract
A styrenic block copolymer is disclosed, having a formula, A-B-A, A-B-B-A, (A-B-A)X, (A-B)X or mixtures thereof, wherein n is from 2 to 30, and X is residue of a coupling agent. Each A block is independently a polystyrene having 10-63 wt. % 1,1-diphenylethylene, a GPC peak molecular weight from about 5-40 kg/mol, and forms 10-40 wt. % of the copolymer. Each B block is independently a poly(1,3-diene-co-styrene) comprising: (i) >90 wt. % of polymerized isoprene units relative to the weight of the polymerized 1,3-diene, where S is <40, and (S+V) is 18-75; (ii) >90 wt. % of polymerized butadiene units relative to the weight of the polymerized 1,3-diene, where S is <40, and (1.2*S+V) is 60-120; or combinations thereof 'S' represents the polystyrene content, and 'V' represents the 1,3-diene content having pendant 1,2- and/or 3,4-vinyl groups in the B block.