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US 4,277,582 AGranted
Water-insoluble hydrophilic copolymers
AssigneeCiba-Geigy Corporation
InventorsKarl F. Mueller, William R. Good
Life of this patent
Estimating the term…
Abstract
A water-insoluble hydrophilic gel comprising: (A) about 30 to about 90% of a hydrophilic (a) polymer of identical or different watersoluble mono-olefinic monomers, or (b) copolymer of said watersoluble monomers with 1 to 70% of water-insoluble, identical or different mono-olefinic monomers, which polymer or copolymer is cross-linked with (B) about 10 to about 70% of a terminal diolefinic hydrophobic macromer having a molecular weight from about 400 to about 8000.
Claims16
A water-insoluble hydrophilic gel comprising the crosslinked copolymerization product of
- (A) about 30 to about 90% by weight of said gel of (a) a water-soluble monoolefinic monomer, or mixture of said monomers, or (b) a water-soluble monomer, or mixture of said monomers, with 1 to 50% by weight of total monomers of a water-insoluble monoolefinic monomer, or mixture of said water-insolulbe monomers, with
- (B) about 10 to about 70% by weight of said gel of a terminal diolefinic hydrophilic macromer having a molecular weight from about 400 to about 8000, said monomer having the formula ##STR6## wherein R.sub.1 is a polycondensate chain having a molecular weight from about 200 to about 8000, which is the residue of a poly(propylene oxide) or poly(tetramethylene oxide) glycol having ether linkages.
Dependencies are inferred from the claim text.