Water-soluble associative triblock copolymers
US5798421A · kind A · utility
5Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Oct 9, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C255/65
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention relates to copolymers of molecular mass of between 5,000 and 300,000, consisting of a hydrophilic central portion, for example a polyacrylamide chain, and of hydrophobic ends the hydrophobicity of which is comparable with that of alkyl groups containing 4-20 carbons. They are produced by polymerization of hydrophilic monomers with the aid of initiators, for example of azo type, the hydrophobic residues of which will constitute the hydrophobic ends of the final copolymer. These copolymers are useful for rheological control of aqueous and/or pigmented compositions, like paints.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.