Process for polymerizing vinyl chloride with polyglycosyl polyol esters
US4789715A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1986 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Oct 17, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F291/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyvinyl chloride is produced by suspension polymerization in the presence of two suspension agents, namely PA0 (a) 10-90% by weight, based on the mixture, of a carbohydrate ester of a carbohydrate having the following formula ##STR1## wherein n is a number of 0 to 99 and PA1 R is the residue of a di- to hexahydric aliphatic, linear or branched alcohol of 2-12 carbon atoms, and a saturated or unsaturated, linear or branched carboxylic acid of 6-24 carbon atoms, as well as of PA0 90-10% by weight, based on the suspension agent mixture, of a specific cellulose ether or a specific partially saponified polyvinyl alcohol. The resultant polyvinyl chloride exhibits simultaneously the desired properties of very low gel number besides high porosity and high powder density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.