Process of polymerizing vinyl chloride with post-heating of charging passage
US4985524A · kind A · utility
3Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1989 |
| Grant date | Jan 15, 1991 |
| Priority date | — |
| Expiry date | May 18, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F14/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process of preparing a vinyl chloride polymer in a polymerization vessel comprising the steps of: PA0 charging a polymerization initiator through a charging passage communicating with the inside of the polymerization vessel, and PA0 polymerizing vinyl chloride or a vinyl monomer mixture containing vinyl chloride in an aqueous medium, PA0 wherein after said polymerization initiator has been charged into the polymerization vessel, said charging passage is externally heated. This process can prevent scale formation in the charging passage, and produce a vinyl chloride polymer of high quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.