Processes for the preparation of polymeric thickeners and uses thereof
US4230844A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1978 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Sep 28, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Processes for preparing polymeric thickeners are provided which give, in preferred compositions, both good flow and leveling properties as well as sag resistance to coating compositions such as aqueous paints. The thickeners are prepared by conducting the polymerization in glycol such as ethylene glycol or propylene glycol with or without a little added water. The monomers polymerized consist essentially of (a) about 1-99% by weight of at least one unsaturated carboxylic acid of 3 to 6 carbon atoms, and (b) about 99-1% by weight of at least one ester of the formula ##STR1## wherein R and R.sub.2 are each hydrogen or methyl, PA1 x is a positive integer of 5 to 80, PA1 y is an integer of 0 to 20, and PA1 R.sub.1 is alkyl of 1 to 20 carbon atoms or alkyl phenyl where the alkyl group is from 1 to 20 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.