Method of incorporating hydrophobic monomers into acrylamide solutions
US4906716A · kind A · utility
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13Claims
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Key dates
| Filing date | May 17, 1988 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | May 17, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/56
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Hydrophobic water-insoluble monomers, such as alkyl acrylamides, which are solid at room temperature may be sufficiently dissolved in concentrated acrylamide or methacrylamide monomer solutions, in the absence of cosolvents, to allow copolymerization to occur without substantial phase separation. The hydrophobic monomer is added to the acrylamide monomer solution and heated, with agitation, to above the melting point of the hydrophobic monomer. Thereafter the temperature must be maintained at no lower than about 15.degree. C. below the melting point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.