Surface treatment of polymers
US4798861A · kind A · utility
36Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1986 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Nov 24, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2300/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The properties of water soluble or, especially water swellable polymer particles are improved by surface cross linking that is caused by providing a dispersion of gel polymer particles in an organic solvent, reacting the surfaces of these particles with dissolved cross linking agent and azeotropically distilling the dispersion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.