Polymer emulsion preservation using cationic compounds
US6890969B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2001 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | May 8, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J3/03
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention is directed to a method of preserving colloid-stabilized polymer emulsions against microbial attack and spoilage using selected cationic compounds. It is also directed to compositions containing colloid-stabilized polymer emulsions and cationic compounds that are resistant to contamination with biodeteriogenic microbes. It has been discovered that specific cationic compounds are particularly effective against biodeteriogenic microbes in preserving polymer emulsions that have been stabilized with protective colloids, such as poly(vinyl alcohol). Examples of suitable microbicidal cationic compounds are: substituted pyridinium salts, substituted guanidine salts, tetrasubstituted ammonium salts, and polymeric cationic compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.