Finely particulate composite latices and use thereof in solvent-free paints
US6054526A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1998 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Jan 20, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D151/003
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Composite latex whose average particle size is between 30 and 150 nm, as these particles result from polymerization of a mixture hydrophobic monomers composed of styrene and (meth)acrylic esters to produce an emulsion in an aqueous solution of a water-soluble or water-dispersible amphiphilic copolymer having a molecular weight of between 500 and 5,000 and whose acid number of less than 500, said latex being composed of a combination of hydrophobic and hydrophilic monomers incorporating carboxylic acid functions in the presence of a radical-producing initiator, wherein said aqueous water-soluble amphiphilic polymer is free of any other surfactant or protective colloid and wherein the mass percentage of amphiphilic copolymer in relation to the dry extract of the latex between 10 and 50%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.