Thermosetting powder-type coating compositions
US5872192A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Aug 11, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermosetting powder coatings based on epoxide-containing acrylate copolymer resins are disclosed comprising: PA1 (A) an acrylate copolymer that contains glycidyl ether residues; PA1 (B) an aliphatic and/or cycloaliphatic polybasic acid and/or a polyol-modified anhydride of a polybasic acid and/or an amorphous or semi-crystalline carboxy-functional copolyester resin and/or a carboxy-functional acrylic resin; PA1 (C) and, optionally, fillers and/or pigments and/or additives wherein the acrylate copolymer (A) has a molecular weight (Mw) of 1,000 to 30,000 and a glass transition temperature of 20 to 120.degree. C. and is obtainable by, in a first step, preparing a hydroxyl-functional acrylate copolymer (D), which copolymer is then transformed into the acrylate copolymer (A), by reaction with epihaloalkanes. The aforementioned compositions can be processed further to give thermosetting powder coatings which can be applied to substrates such as metal to form protective coatings or films.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.