Method of dispersing inorganic materials in aqueous systems with low molecular weight acrylic acid copolymers
US4517098A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1983 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | Apr 15, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F5/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for dispersing inorganic materials in aqueous systems using water soluble, low molecular weight copolymers of acrylic acid is provided. Copolymers having a weight average molecular weight of from about 2,000 to about 5,000 formed from about 85 to about 97 weight percent acrylic acid and from about 3 to about 15 weight percent of a hydrophobic comonomer are provided for effective dispersion of suspended particulate matter, such as clay, and for inhibiting the precipitation of common hardness ion salts in aqueous systems. The most preferred copolymers have a weight average molecular weight of about 3,000 and are formed from about 95 weight percent acrylic acid and about 5 weight percent ethyl acrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.