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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.:

US 12715943 B1

PDFFull Text
Date of Patent:
Aug. 25, 2026

Filed:

Dec. 26, 2023

Polyfunctional vinyl aromatic copolymer and method for manufacturing same, copolymer rubber obtained therefrom, rubber composition, rubber crosslinked material, and tire member

Applicant:

Nippon Steel Chemical & Material Co., Ltd., Tokyo, JP;

Inventors:

Masanao Kawabe, Tokyo, JP;

Tadashi Kuratomi, Tokyo, JP;

Shinichi Iwashita, Tokyo, JP;

Assignee:

NIPPON STEEL Chemical & Material Co., Ltd., Tokyo, JP;

Attorneys:

Troutman Pepper Locke LLP

James E. Armstrong, IV

Primary Examiner:

Patrick D Niland

Int. Cl.
CPC ...
C08F 212/08 (2006.01); B60C 1/00 (2006.01); C08F 2/06 (2006.01); C08F 2/44 (2006.01); C08F 8/42 (2006.01); C08F 210/14 (2006.01); C08F 212/02 (2006.01); C08F 212/12 (2006.01); C08F 212/32 (2006.01); C08F 212/34 (2006.01); C08F 212/36 (2006.01); C08F 232/08 (2006.01); C08F 236/10 (2006.01); C08F 255/08 (2006.01); C08F 257/00 (2006.01); C08F 257/02 (2006.01); C08F 277/00 (2006.01); C08F 289/00 (2006.01); C08K 3/013 (2018.01); C08K 3/22 (2006.01); C08K 3/36 (2006.01); C08L 25/04 (2006.01); C08L 51/00 (2006.01); C08L 51/06 (2006.01); C08K 3/04 (2006.01);
U.S. Cl.
CPC ...
C08F 212/08 (2013.01); B60C 1/00 (2013.01); C08F 2/06 (2013.01); C08F 2/44 (2013.01); C08F 8/42 (2013.01); C08F 210/14 (2013.01); C08F 212/02 (2013.01); C08F 212/12 (2013.01); C08F 212/32 (2013.01); C08F 212/34 (2013.01); C08F 212/36 (2013.01); C08F 232/08 (2013.01); C08F 236/10 (2013.01); C08F 255/08 (2013.01); C08F 257/00 (2013.01); C08F 257/02 (2013.01); C08F 277/00 (2013.01); C08F 289/00 (2013.01); C08K 3/013 (2018.01); C08K 3/22 (2013.01); C08K 3/36 (2013.01); C08L 25/04 (2013.01); C08L 51/003 (2013.01); C08L 51/06 (2013.01); C08K 3/04 (2013.01); C08K 2003/2296 (2013.01); Y02T 10/86 (2013.01);
Abstract

Provided is a polyfunctional vinyl aromatic copolymer having reactivity and solubility that can be used for manufacturing a copolymer rubber and a copolymer rubber material having processability, strength and homogeneity obtained therefrom. The polyfunctional vinyl aromatic copolymer includes: 0.5 mol % or more and 40 mol % or less of a structural unit (a) derived from a divinyl aromatic compound and 60 mol % or more and 99.5 mol % or less of a structural unit (b) derived from a monovinyl aromatic compound, in which at least some of the structural units (a) are a crosslinked structural unit (a2) represented by the following Formula (2) and a vinyl-group-containing structural unit (a1) represented by the following Formula (1): in the formulas, R's independently represent an aromatic hydrocarbon group having 6 to 30 carbon atoms.

Find Patent Forward Citations

Quick Actions:

Kawabe, Masanao. (2026). Polyfunctional vinyl aromatic copolymer and method for manufacturing same, copolymer rubber obtained therefrom, rubber composition, rubber crosslinked material, and tire member (U.S. Patent No. 12715943). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12715943

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