Method for obtaining water-soluble polymers, resulting polymers and uses thereof
US6956090B1 · kind B1 · utility
2Cited by
9References
12Claims
0Family size
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Key dates
| Filing date | Sep 13, 2000 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Sep 13, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of obtaining homopolymers and/or copolymers in aqueous solution by the use of phosphorous acid and/or its salts or sodium hypophosphite and by neutralization during the polymerisation of the ethylenically unsaturated monomers by the continuous addition, first of all, of bases such as sodium hydroxide, potassium hydroxide or lithium hydroxide and then bases of alkaline earths such as calcium hydroxide, magnesium hydroxide, calcium oxide or magnesium oxide.The polymers obtained by the said method and uses thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.