2,2-dimethyl-1,3-dioxolan-4-yl-methyl 2-bromo-2,2-difluoroacetate, waterborne polyurethane, and preparation methods thereof

US12240938B2 · kind B2 · utility

Assignees

• Hangzhou Transfar Fine Chemical Co., Ltd. · CN
• Hangzhou Normal University · CN

Inventors

• Shengpeng Wang · Jiaozhou City, CN
• Bajin Chen · Hangzhou City, CN
• Weiming Xu · Hangzhou City, CN
• Jinxing Song · Hangzhou City, CN
• Pengfei Zhang · Hong Kong, CN
• Xiaojun Wang · Holdrege, US
• Bencheng Yu · Hangzhou City, CN
• Youju Huang · Hangzhou City, CN
• Xiaobo Yang · Chengdu, CN

Key dates

• Filing date: Dec 30, 2021
• Grant date: Mar 4, 2025
• Expiry date: Aug 20, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2170/80
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed are (2,2-dimethyl-1,3-dioxolan-4-yl)methyl 2-bromo-2,2-difluoroacetate, a waterborne polyurethane, and preparation methods thereof. The (2,2-dimethyl-1,3-dioxolan-4-yl)methyl 2-bromo-2,2-difluoroacetate could be used as a modified monomer for preparing a waterborne polyurethane, and substituents at a C2 position of the (2,2-dimethyl-1,3-dioxolan-4-yl)methyl 2-bromo-2,2-difluoroacetate are two fluorine atoms and one bromine atom. When it is used for preparing the waterborne polyurethane, fluorine and bromine groups are introduced into the structure of the waterborne polyurethane, and the resultant waterborne polyurethane exhibits good moisture resistance and flame retardance.