Method of treating a polymer latex to remove unreacted monomer by treatment in a column
US4130527A · kind A · utility
14Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1977 |
| Grant date | Dec 19, 1978 |
| Priority date | — |
| Expiry date | Dec 29, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S159/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Residual unreacted monomer, such as vinyl chloride monomer, is removed from an aqueous latex of polymer, such as polyvinyl chloride, by allowing the latex to flow as a thin liquid film down the inner surface of a substantially vertical column at subatmospheric pressure countercurrent to an ascending flow of steam. If desired, packing may be inserted in the column to enhance the removal of residual monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.