Discrete bead polymer process
US4255545A · kind A · utility
3Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1980 |
| Grant date | Mar 10, 1981 |
| Priority date | — |
| Expiry date | Jan 7, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F120/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Discrete particles of sodium polyacrylate of high molecular weight and in which the majority of the particle size is in the range of not less than 0.5 mm. nor more than 1.0 mm. diameter are achieved, in an economy of production, by suspension polymerization in stages of 40.degree. C. (2 hours), 50.degree. C. (2 hours) and 60.degree. C. (2 hours) in the presence of a protective colloid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.