Reduction of wall fouling in the suspension polymerization of vinyl chloride homopolymer
US4451625A · kind A · utility
2Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1982 |
| Grant date | May 29, 1984 |
| Priority date | — |
| Expiry date | Aug 5, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/004
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a method for reducing the amount of wall fouling in the suspension polymerization of vinyl chloride. The surfaces of the polymerization reactor are wetted with a solution containing from 5 to 50 wt % alkali metal hydroxide, 0.01 to 1 wt % free radical inhibitor and 0.01 to 1 wt % surface active agent prior to charging the vinyl chloride polymerization recipe to the reactor. Preferably, the surface of the wetted reactor is heated to a temperature from 40.degree. to 100.degree. C. for at least 5 minutes prior to charging the polymerization recipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.