Composition for lining the walls of reactors and connected apparatus used for polymerizing vinyl compounds which prevents or reduces deposits and incrustations on said apparatus, and the method for its use
US4456731A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1982 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Mar 1, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition for lining the walls of reactors and other connected apparatus in contact with reactant mixtures and reaction products during the polymerization of vinyl compounds, which reduces or prevents polymer deposits or incrustations on the said walls, constituted by the product of the prolonged reaction at 75.degree. C. between a polyvinyl alcohol of medium degree of hydrolysis prepared by the controlled alkaline alcoholysis of an ester of a wide molecular weight distribution polyvinyl alcohol and a polycarboxylic oxyacid, in a weight ratio of beween 35:10 and 40:10, which is applicable by known means, preferably by spraying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.