Aqueous polymer dispersion and process of making the same

US12110394B2 · kind B2 · utility

Assignees

• DOW GLOBAL TECHNOLOGIES LLC · US
• Rohm and Haas Company · US
• Dow Silicones Corporation · US

Inventors

• Xiangting Dong · Shanghai, CN
• Ling Li · 流花街道, CN
• Zhihua Liu · Beijing, CN
• Hui Liu · Shanghai, CN
• Wei Cui · London, GB
• Baoqing Zheng · Shanghai, CN
• Zhi Juan Gong · Shanghai, CN
• Yan Wu · Longbeilingcun, CN
• Changkun Piao · Shanghai, CN
• Jia Tang · Tangxia, CN
• Dong Yun · Shanghai, CN

Key dates

• Filing date: Jun 13, 2019
• Grant date: Oct 8, 2024
• Expiry date: Nov 19, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An aqueous dispersion comprising a multistage polymer comprising a first polymer and a second polymer that comprises structural units of an ethylenically unsaturated siloxane monomer, the multistage polymer comprising, by weight based on the weight of the multistage polymer, 4.5% or more of structural units of the ethylenically unsaturated siloxane monomer, and the coagulum content of the aqueous dispersion is less than 2,000 ppm after filtration through a 44 micron sieve.