Reduced polymer buildup in condenser of reactor vessel
US4487899A · kind A · utility
4Cited by
2References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1982 |
| Grant date | Dec 11, 1984 |
| Priority date | — |
| Expiry date | Sep 22, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F14/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a suspension polymerization process for polymerizing vinyl monomers in a reaction vessel equipped with an external cooling means, such as a reflux condenser, as well as a cooling jacket, wherein polymer buildup in said external cooling means can be substantially eliminated. This is accomplished by adding in a plurality of charges to the reaction mixture nonionic surface active or wetting agents having a hydrophile-lipophile balance (HLB) in the range of from about 9 to about 16 thus resulting in reducing charge expansion and attendant reduction in foaming of the charge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.