Method for bulk polymerization of vinyl chloride
US4098972A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1976 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Mar 16, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/0236
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Vinyl chloride monomers or a monomeric mixture composed mainly of vinyl chloride is bulk-polymerized in a polymerization vessel. The inner walls and other surfaces of said vessel, coming into contact with the monomer or monomers, are coated with one or more specifically selected inorganic or organic compounds having a solubility greater than 0.5 g in 100 g of water at 25.degree. C and a boiling point higher than 60.degree. C. This bulk polymerization method serves to greatly reduce the deposition of polymer scale on the vessel walls and other surfaces. In addition the polymer scale deposited can be readily separated and removed by merely washing with water or gas under pressure. The present method provides high quality polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.