Process for preparing styrenic polymer particles
US4271281A · kind A · utility
44Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1980 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | May 29, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F12/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Styrenic polymer particles having a uniform particle size distribution are prepared without the formation of fine polymer powders. The suspension polymerization process which comprises providing a stirred, aqueous suspension of polymeric seed particles, adding gradually to the suspension styrenic monomer and polymerizing it therein, and continuing the addition of monomer as the polymerization proceeds, may be improved by introducing the styrenic monomer below the surface of the suspension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.