Styrenated maleinized fatty acid glyceride copolymer for aqueous dispersed binders in solvent free ambient dry paints
US6646085B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2000 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | May 13, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ambient dry water dispersed coating composition substantially free of volatile organic coalescing solvents, the coating composition containing a polymer film forming binder comprises between 40% and 50% copolymerized non-conjugated, unsaturated fatty acid triglyceride, between 40% and 55% copolymerized ethylenic monomer including styrene, and between 3% and 12% copolymerized maleic anhydride. The film forming copolymer is produced by first reacting maleic anhydride with the fatty acid triglyceride at high temperatures between 140° C. to form a maleinized triglyceride having a pendent maleic anhydride structure. The maleinized triglyceride is then styrenated at temperatures between about 80° C. and 200° C. in the presence of at least 4% peroxide initiator based on the weight of monomers copolymerized to form a styrenated, maleinized fatty acid triglyceride copolymer having anhydride groups. The anhydride groups are neutralized with amine or ammonia and the neutralized copolymer is dispersed in water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.