Scratch resistant top coating composition
US4960828A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 5, 1988 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Aug 5, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A top coating composition comprising PA1 (A) a polyol resin having a weight average molecular weight of 400 to 2,000 a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) of not more than 1.6, and a hydroxyl value of 150 to 400 mg KOH/g, PA1 (B) at least one polyol resin selected from the group consisting of PA2 (1) a polyester polyol having a weight average molecular weight of 2,000 to 50,000, a hydroxyl value of 50 to 200 mg KOH/g, and cyclohexylene ring content of not less than 7 percent by weight, PA2 (2) an acrylic polyol resin containing 20 to 60 percent by weight of acrylic and/or methacrylic ester of a monohydric alcohol of 6 to 18 carbon atoms, and having a weight average molecular weight of 5,000 to 50,000 and a hydroxyl value of 50 to 180 mg KOH/g, and PA2 (3) a mixed polyol resin consisting of a non-aqueous dispersion type acrylic resin prepared by dispersion-polymerizing at least one vinyl monomer in the presence of a polymer dispersion stabilizer and an organic solvent, and a solution type acrylic polyol resin having a weight average molecular weight of 5,000 to 50,000 and a hydroxyl value of 50 to 180 mg KOH/g, and PA1 (C) an alkoxy …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.