Method of preparing condensation polymers by emulsion polymerization
US5856401A · kind A · utility
2Cited by
2References
19Claims
0Family size
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Inventor
Key dates
| Filing date | Jan 27, 1998 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Jan 27, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method wherein polyesters are prepared under mild conditions by directly condensing hydroxycarboxylic acids or mixtures of polyfunctional alcohols and carboxylic acids in hydrophobic media using heterogeneous catalysts that can form a hydrophilic phase. The systems are inverse emulsions, inverse microemulsions and solid-in-liquid dispersions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.