Process for continuous production of ethylene-vinyl acetate copolymer
US4657994A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1986 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Jan 6, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00103
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved process for continuously producing ethylene-vinyl acetate copolymer containing 20 to 50 mole % of ethylene is provided. An aliphatic alcohol solvent is employed in the polymerization vessel. Ethylene vapor discharged from the polymerization vessel is introduced into the tubes of the lower part of a multi-tubular heat exchanger. Vinyl acetate is introduced into the upper part of the heat exchanger and caused to flow through said tubes, thereby effecting absorption and solubilization of ethylene into the vinyl acetate. The solubilized ethylene and vinyl acetate is passed to the polymerization vessel. The process of this invention permits the stable production of the copolymer over a long period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.