Base for a graft polymer, novel graft polymer compositions, solvents and water-reducible coatings incorporating the novel graft polymers, and processes for making them
US4399241A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1980 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Mar 21, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D151/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provides new and improved water-reducible coating compositions and methods of making them. Three preferred processes are disclosed. These differ in the manner of incorporating and chemical nature of an extender polymer. Broadly, the process of the invention is one for forming an aqueous dispersion of a fluent resinous composition of PA1 a. a mixture in an organic solvent of PA2 (i) an ionizable graft polymer of an epoxy resin and an addition polymerized resin, the addition polymerized resin being bonded to aliphatic backbone carbon atoms of the epoxy resin by carbon-to-carbon bonds, and PA2 (ii) an extender resin; PA1 b. an aqueous vehicle, and PA1 c. an ionizing agent; the ionization present from said combined components being sufficient to establish the components as a dispersion in the aqueous vehicle, and then addition polymerizing a quantity of addition polymerizable monomer, under addition polymerizing conditions, in said aqueous dispersion, the aqueous dispersion serving as a vehicle therefor. In another aspect of the invention, a grafting base is produced by advancing an aromatic epoxy resin in the presence of at least one extender resin and a sufficient amount of an organi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.