Method for reducing PVC polymer buildup in polymerization reactors
US4104454A · kind A · utility
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3References
7Claims
0Family size
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Key dates
| Filing date | Jun 20, 1977 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Jun 20, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/004
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preventing polymer buildup in the polymerization reactor during the suspension polymerization of vinyl chloride monomer to form polyvinyl chloride polymer and copolymers, the method comprising coating reactor surfaces in contact with the reaction medium with a material selected from the group consisting of alumina, dithiooxamide, and mixtures of these prior to carrying out this polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.