Coating compositions having improved scratch resistance, coated substrates and methods related thereto

US6803408B2 · kind B2 · utility

Assignee

• PPG Industries Ohio, Inc. · US

Inventors

• Lawrence G. Anderson · Washington, US
• Karen A. Barkac · Murrysville, US
• Shawn A. DeSaw · McMurray, US
• Marvis E. Hartman · Pittsburgh, US
• Deborah E. Hayes · Verona, US
• Thomas R. Hockswender · Gibsonia, US
• Kymarie L. Kuster · Pittsburgh, US
• Masayuki Nakajima · Whitehall, US
• Kurt G. Olson · Gibsonia, US
• Richard J. Sadvary · Washington, US
• Dennis A. Simpson · Sarver, US
• Shiryn Tyebjee · Washington, US
• Truman F. Wilt · Lock Haven, US

Key dates

• Filing date: Jun 9, 2003
• Grant date: Oct 12, 2004
• Expiry date: Jun 9, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K2201/011
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compositions are provided which contain (a) one or more polysiloxanes comprising at least one reactive functional group; a plurality of particles; and, optionally, one or more curing agents comprising at least one functional group that is reactive with any reactive functional group of polysiloxane (a). Additionally, a process for applying the multi-component composite coatings described above to a substrate and coated substrates are provided. A process for preparing the coating compositions also is provided. The multi-component composite coating compositions of the invention provide highly scratch resistant color-plus-clearcoatings capable of retaining scratch resistance after weathering.