Branched polymeric dispersants, aqueous pigment dispersions, and aqueous coating compositions thereof

US11286322B2 · kind B2 · utility

Assignees

• DOW GLOBAL TECHNOLOGIES LLC · US
• Rohm and Haas Company · US
• The Regents of the University of California · US

Inventors

• David Lunn · Abingdon, GB
• Sungbaek Seo · Songgye-ri, KR
• Craig J. Hawker · Los Gatos, US
• Alaina McGrath · Lompoc, US
• Paul Clark · Midland, US
• Antony K. Van Dyk · Blue Bell, US
• Sang Ho Lee · Seojong-myeon, KR

Key dates

• Filing date: Aug 1, 2019
• Grant date: Mar 29, 2022
• Expiry date: Aug 1, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D7/40
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A branched polycarboxylic acid or salt thereof, wherein the average number of branches is (2) to (100) and the average degree of polymerization of the branches is (2) to (50), is an effective polymeric dispersant. More specifically, the polymeric dispersant is a branched polycarboxylic acid or salt thereof, in which the branched polycarboxylic acid is derived from polymerization of (meth)acrylic acid; the average degree of polymerization is (10) to (150); the average number of branches is (2) to (20); and the average degree of polymerization of the branches is (2) to (30). The branched polycarboxylic acid or salt thereof can be combined with a pigment to form an aqueous dispersion. An aqueous coating composition includes the aqueous dispersion; a polymeric binder; and a rheology modifier.