Process for the polymerization of vinyl chloride in aqueous suspension utilizing an oil-soluble initiator and subsequently a water-soluble initiator and use of the powders obtained thereby
US4243562A · kind A · utility
9Cited by
5References
10Claims
0Family size
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Key dates
| Filing date | Jun 2, 1978 |
| Grant date | Jan 6, 1981 |
| Priority date | — |
| Expiry date | Jun 2, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/911
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Process for the polymerization of vinyl chloride in aqueous suspension in the presence of a dispersing system comprising a cellulosic derivative and an anionic emulsifying agent wherein the polymerizaton is initiated by an oil-soluble initiator and a water-soluble free radical polymerization initiator is added in the course of polymerization. The thus obtained polyvinyl chloride powders are particularly suitable for the production of battery separators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.