Alkali metal acrylate or ammonium acrylate polymer excellent in salt solution-absorbency and process for producing same
US4340706A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1980 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | Nov 21, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An alkali metal acrylate polymer obtained by suspending an aqueous solution of acrylic acid and an alkali metal acrylate in an alicyclic or aliphatic hydrocarbon solvent containing a surfactant having an HLB value of 8-12 and subjecting the suspension to inverse suspension polymerization in the presence of a water-soluble radical polymerization initiator has a much higher water-absorbency and particularly salt solution-absorbency than known ones. If said polymer is crosslinked with a crosslinking agent, its stability in the fluid-absorbed state for a long period of time is improved and the absorption rate when absorbing water is also improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.