Solution polymerized styrene-butadiene rubber-polyurethane elastomer material for high performance tire and preparation method thereof

US10717854B2 · kind B2 · utility

Assignees

• Beijing University of Chemical Technology · CN
• Red Avenue New Materials Group Co., Ltd. · CN

Inventors

• Liqun Zhang · Beijing, CN
• Xuan Qin · Beijing, CN
• Bingyong Han · Beijing, CN
• Lixin Mao · Beijing, CN
• Xiaohui Wu · Mountain View, US
• Jun Liu · Dressendorf, DE
• Ning Zhang · Saratoga, US
• Dong Dong · Blacksburg, US

Key dates

• Filing date: Nov 20, 2018
• Grant date: Jul 21, 2020
• Expiry date: Jan 11, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A solution polymerized styrene-butadiene rubber-polyurethane elastomer material and a preparation method thereof are provided. The elastomer material is prepared by performing cast molding on a soft segment and a hard segment in a mass ratio of 100:(20-50); the soft segment includes hydroxyl-terminated solution polymerized styrene-butadiene moiety rubber prepared by an anionic polymerization; the hard segment comprises isocyanate, a small-molecule polyol chain extender and a cross-linking agent; and the soft segment has a molecular weight of 1000-8000 and a glass-transition temperature of −20° C. to −30° C. According to the elastomer material in the disclosure, the hydroxyl-terminated solution polymerized styrene-butadiene rubber is introduced to serve as the soft segment on the basis of synthesis of the traditional polyurethane elastomer, so that the glass-transition temperature of the polyurethane elastomer is regulated, defects such as poor high temperature resistance and undesirable wet-skid resistant grip ability of an existing polyurethane tire are overcome.