Sulfur dioxide for vapor phase elimination of styrene and acrylonitrile popcorn polymer in bulk san production
US5399644A · kind A · utility
4Cited by
19References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1994 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Jun 7, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/917
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A bulk or mass polymerization process is provided which involves bulk polymerization of vinyl monomers in a liquid phase in the presence of a nitrogen rich vapor phase containing amounts of sulfur dioxide effective to inhibit formation of popcorn polymer during the reaction. The process may be used as a step in the formation of polymer or may be used as the entire reaction process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.