Freeze-thaw stable polyacrylamide emulsions
US5110853A · kind A · utility
19Cited by
9References
23Claims
0Family size
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Key dates
| Filing date | Aug 27, 1990 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Aug 27, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2300/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Water-in-oil emulsions of water-soluble polymers, i.e. polyacrylamides, which are subject to freeze-thaw degradation are stabilized against repeated freeze-thaw cycles by incorporating specific ethoxylated alkylphenol surfactants containing low levels of ethoxylation. Moreover, the resultant emulsions exhibit superior resistance to sheet gel formation under ambient storage conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.