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A water-insoluble hydrophilic gel comprising (A) about 20 to about 90% by weight of a hydrophilic (a) polymer of identical or different water-soluble monoolefinic monomers, or (b) copolymer of said water-soluble monomers with 1 to 80% (of total monomers) of water-insoluble, identical or different mo

A water-insoluble hydrophilic gel comprising (A) about 20 to about 90% by weight of a hydrophilic (a) polymer of identical or different water-soluble monoolefinic monomers, or (b) copolymer of said water-soluble monomers with 1 to 80% (of total monomers) of water-insoluble, identical or different monoolefinic monomers; which polymer or copolymer is cross-linked with (B) about 10 to about 80% by weight of a terminal polyolefinic siloxane macromer having a molecular weight from about 400 to about 8500.

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A water-insoluble hydrophilic gel comprising the crosslinked copolymerization product of (A) about 20 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 80% by weight of t

A water-insoluble hydrophilic gel comprising the crosslinked copolymerization product of (A) about 20 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 80% by weight of total monomers of a water-insoluble monoolefinic monomer, or mixture of said water-insoluble monomers, with (B) about 10 to about 80% by weight of said gel of a terminal polyolefinic hydrophobic siloxane macromer having a molecular weight from about 400 to about 8500, said macromer having the formula [Figure] (B) wherein R1 is a polysiloxane chain having a molecular weight from about 200 to about 8000, and is of the formula [Figure] or [Figure] R2 is hydrogen or methyl, R3 is hydrogen or －COOR4, R4 is hydrogen or alkyl of 1 to 10 carbon atoms, and with the proviso that at least one of R2 and R3 is hydrogen, X is oxa, －COO－or －CONR5－, R5 is hydrogen or alkyl of 1 to 5 carbon atoms, R6 is a branched or linear alkylene of 1 to 7 carbon atoms or －CH2CH2O－n where n is 1 to 20, x is an integer of 3 to 120, y is an integer of 2 to 3, z is an integer of 1 to 2, Y is the direct bond, the diradical －R7Z1－CONH－R8－NHCO－Z2－, or －R7OCOCH2CH2S－, R7 is a linear or branched alkylene of 2 to 5 carbon atoms connected to X, R8 is a diradical obtained by removing the NCO groups from an aliphatic, cycloaliphatic or aromatic diisocyanate, Z1 is oxa or －NR5－, Z2 is Z1 or thia and is connected to R6, with the proviso that if X is oxa, Y is different from a direct bond and R2 and R3 are hydrogen.