Low temperature cure coating composition

US12371588B2 · kind B2 · utility

Assignee

• PPG Industries Ohio, Inc. · US

Inventors

• Shanti Swarup · Allison Park, US
• Jose Antonio Camerano · Ludwigsburg, DE
• Wolfgang Klaeger · Leonberg, DE
• Richard J. Sadvary · Washington, US
• Beate Seiler · Affaltrach, DE
• Chad Landis · Oakmont, US
• Caroline S. Harris · Pittsburgh, US
• Tsukasa Mizuhara · Gibsonia, US
• Hongying Zhou · Allison Park, US

Key dates

• Filing date: Aug 5, 2020
• Grant date: Jul 29, 2025
• Expiry date: Aug 27, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D7/70
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A coating composition includes: an aqueous medium; a first polymer comprising first core-shell particles dispersed in the aqueous medium, where the first core-shell particles include (i) keto and/or aldo functional groups, (ii) a polymeric shell including carboxylic acid functional groups and urethane and/or urea linkages, and (iii) a polymeric core at least partially encapsulated by the polymeric shell, where the polymeric shell and/or the polymeric core include the keto and/or aldo functional groups; a second polymer dispersed in the aqueous medium, the second polymer including carboxylic acid functional groups and hydroxyl functional groups; a first crosslinker including a polyhydrazide reactive with the first core-shell particles; and a second crosslinker reactive with the first core-shell particles and/or the second polymer, where the polymeric core of the first core-shell particles are covalently bonded to at least a portion of the corresponding polymeric shell.