Method of breaking foam generated from PVC paste resin latex
US6288211A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2000 |
| Grant date | Sep 11, 2001 |
| Priority date | — |
| Expiry date | Sep 7, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/0011
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
As a method of vacuum recovery of residual monomers from PVC paste resin latex by heating the latex, the present invention is capable of breaking foam derived from foamable PVC paste resin latex after polymerization by utilizing the methods: using a residual monomer vacuum recovery apparatus having a foam separator and transferring the foam which overflows from the vacuum recovery vessel to the foam separator so that the foam makes direct contact with steam causing a breakdown of the foam. This is done without reducing operability, without lowering stable operation, without degrading product quality, and without reducing the solid concentration of the latex.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.