Aqueous dispersions
US6395813B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Jul 28, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K23/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a dispersion of particulate solid in a medium containing water and at least one dispersing agent. In particular, the dispersing agent comprises a water soluble polymer wherein X is H, Na, K, Ca, Mg, NH4+ or A; andA is a polymer, copolymer or water soluble salt thereof, comprising one or more of the following monomers in polymerised form: wherein R1 is H, OH, C1 to C9 alkyl or alkoxy or acetoxy or acetateR2 is H, C1 to C3 alkyl or alkxy, COOR3 R3 is H, Na, K, or C1 to C10 alkyl;hydroxylpropyl acrylate, propyl methacrylate, 2-acrylamido-2-propane sulphonic acid, sodium styrene sulphonate, sodium allylsulphonate, sodium methyl sulphonate, vinyl sulphonic acid, and salts thereof; acrylamide, methacrylamide, tert-butylacrylamide, (meth)acrylonitrile, styrene, vinyl acetate allyloxy-2-hydroxypropyl sulphonate and dialkylacrylamide;and further wherein A contains at least 10 monomers in polymerised form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.