Process for the preparation of polymer particles
US6242540A · kind A · utility
48Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1998 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Dec 30, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2325/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Particles of a copolymer of a vinyl arene and a copolymerizable compound containing a polar moiety and a vinyl moiety containing water may be prepared by forming a mixture of monomers and small amounts of water and polymerizing under agitation to 20 to 70% conversion and then suspending the mass in water and finishing the polymerization. The resulting polymer beads contain finely dispersed water which is useful as an environmentally acceptable blowing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.