Method of preparation of crosslinked hydrophilic resins
US5506324A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 1994 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | May 31, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention is crosslinked carboxyl containing hydrophilic resin crosslinked by a compound corresponding to formula 1, EQU R.sup.1 --(O(CH(R.sup.3)CH(R.sup.3)O).sub.y --C(O)--R.sup.2).sub.x wherein: R.sup.1 is independently is each occurrence a C.sub.2-10 straight or branched chain alkyl moiety; R.sup.2 is independently is each occurrence a C.sub.2-10 straight or branched chain alkenyl moiety; R.sup.3 is independently in each occurrence hydrogen or methyl; x is independently in each occurrence 2 or greater where x is 2; y is independently in each occurrence 3 to 8, and where x is 3 or greater, y is independently in each occurrence 2 to 7. In another embodiment, the invention is a process for the preparation of crosslinked hydrophilic resins which comprises A) contacting one or more ethylenically unsaturated carboxylic acids, acid arthydrides, and optionally one or more known comonomers with a crosslinking compound of formula 1 in an aqueous medium, optionally in the presence of a free radical or redox catalyst system, under conditions such that a crosslinked hydrophilic resin is prepared. Optionally, the properties of the crosslinked hydrophilic resin are enhanced by heating the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.