Use of a copolymer with a surface-active structure as a dispersing and/or crushing aid
US6093764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1998 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Jul 20, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/286
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of dispersing mineral substances in aqueous media, comprising combining: PA1 water, PA1 at least one mineral substance, and PA1 a copolymer which comprises the following monomers in polymerized form: PA1 (a) at least one ethylenically unsaturated monomer having at least one carboxyl function, PA1 (b) optionally, at least one ethylenically unsaturated monomer having at least one sulphonyl function and/or phosphoryl function, PA1 (c) optionally, at least one ethylenically unsaturated monomer having no carboxyl function, and PA1 (d) at least one ethylenically unsaturated oxyalkylated monomer terminating with a hydrophobic chain represented by a specified formula, PA1 where the sum of the weight percent of (a), (b), (c) and (d) in the copolymer is 100%, and the copolymer has a specific viscosity of at most 50. Mineral substances may be effectively dispersed according to the invention, regardless of the surface properties thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.