Process for the preparation of graft polymer dispersions employing liquid free radical catalysts
US4161468A · kind A · utility
14Cited by
4References
7Claims
0Family size
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Key dates
| Filing date | Jun 7, 1978 |
| Grant date | Jul 17, 1979 |
| Priority date | — |
| Expiry date | Jun 7, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/63
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Graft polymer dispersions are prepared by the in situ polymerization in the presence of a free radical catalyst of an ethylenically unsaturated monomer or mixture of monomers in a liquid polyol employing as the free radical catalyst a liquid unsymmetrically-substituted azo compound having a melting point less than 30.degree. C. and a ten hour half-life between 55.degree. C. and 100.degree. C. The dispersions are low viscous liquids which may be advantageously employed in the preparation of polyurethane foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.