Method for removing unreacted monomers from aqueous dispersions of polymerizate
US4092471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1975 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | Oct 8, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Unreacted monomer or monomers and any other volatile organic compounds contained in an aqueous dispersion of polymerizate are removed or separated by a method comprising circulating the aqueous polymerizate dispersion from the bottom of its container to the upper part of the container located over the surface of the dispersion via an exterior conduit. The pressure in the container is maintained at a level reduced to about the saturated vapor pressure of water at the temperature of the dispersion. This manner of separation of monomer from polymer serves to improve the working environment as well as the resulting polymer quality, and the monomer or monomers thus recoverd can be advantageously recycled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.