Suspension polymerization of a vinyl monomer in the presence of (A) carboxymethyl hydrophobically modified hydroxyethylcellulose (CMHMHEC) or (B) CMHMHEC in combination with an electrolyte or polyelectrolyte
US4868238A · kind A · utility
12Cited by
13References
21Claims
0Family size
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Key dates
| Filing date | Dec 23, 1987 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Dec 23, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Suspension polymerization a vinyl monomer in the presence of from about 0.01 to 2.0%, by weight of the total monomer content, of a carboxymethyl hydrophobically modified water-soluble, nonionic cellulose either polymer alone or in combination with an inert electrolyte or inert polyelectrolyte is disclosed. The presence of the carboxymethyl hydrophobically modified water-soluble, nonionic cellulose ether polymer alone or in combination with an inert electrolyte or inert polyelectrolyte provides suspension polymer beads of narrower polydispersity and clarity, and results in minimal latex polymer (emulsion polymer) by-products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.