Process of polymerizing vinyl chloride with washing of charging passage
US5064917A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Jan 5, 2010 |
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: PA1 charging a polymerization initiator through a charging passage communicating with the inside of the polymerization vessel, and PA1 polymerizing vinyl chloride or a vinyl monomer mixture containing vinyl chloride in an aqueous medium, PA1 wherein after said polymerization initiator has been charged into the polymerization vessel, said charging passage is washed with a cleaning fluid containing a polymerization inhibitor. This process can effectively 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.