Process and apparatus for preparation of vinyl polymers
US4324868A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1980 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | Jun 17, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process and apparatus for preparing vinyl polymers by continuous bulk or solution polymerization provide improved mixing during polymerization. In the process, fresh polymerization starting material is incorporated into a part of reaction mixture withdrawn from a polymerization zone and then fed to the polymerization zone. Polymerization temperature is kept at 100.degree. to 200.degree. C. and polymer content in a reaction mixture withdrawn from the polymerization zone is kept at 50 to 80% by weight. A tank having agitating means, outlet opening and recycling inlet is used as polymerization reactor. Said recycling inlet is preferably located at a position corresponding to 1/4 or less of the total height from the bottom to the top of the tank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.