High green strength emulsion rubbers by the use of half-esters of unsaturated dicarboxylic acids
US4446282A · kind A · utility
3Cited by
8References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 1982 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | May 27, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F236/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The green strength of polymers produced by emulsion polymerization processes is improved through the use of carboxyl containing compounds. Specifically, the compounds are half esters of unsaturated dicarboxylic acids wherein the half ester moiety renders the carboxyl containing compound hydrophobic. As a result, carboxylic copolymers can be produced in emulsion polymerizations having a basic (pH.gtoreq.7.0) aqueous medium. Heretofore, use of carboxylic acids in emulsion polymerizations have been limited to acidic mediums.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.