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US 6,020,445 AGranted
Silicone hydrogel polymers
AssigneeJohnson & Johnson Vision Products, Inc.
InventorsDouglas G. Vanderlaan, Ivan M. Nunez, Marcie Hargiss
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Abstract
This invention relates to polymers that are formed by polymerizing a reaction mixture that comprises at least one silicone-containing monomer and at least one hydrophilic monomer. More particularly, this invention relates to polymers formed by polymerizing a reaction mixture that comprises at least one silicone-containing monomer and at least one hydrophilic monomer in the presence of a diluent.
Claims25
A reaction mixture comprising one or more olefinic silicone-containing monomers, one or more hydrophilic monomers, and a diluent comprising the following structure:
- ##STR11## where R, R' and R" are independently selected from H, or unsubstituted, linear, branched or cyclic monovalent alkyl groups having 1 to 7 carbons with the proviso that no more than one of R, R' or R" is H;
- and wherein said hydrophilic monomer is selected from the group consisting of N,N-dimiethyl acrylamide (DMA), 2-hydroxyethyl methacrylate (HEMA), glycerol methylacrylate, 2-hydroxyethyl methacrylamide, polyethyleneglycol, monomethacrylate, methacrylic acid, acrylic acid, N-vinyl prrolidone (NVP), N-vinyl-N-methyl acetamide, N-viny-N-ethyl acetamide, N-vinyl-N-methyl acctamide, N-vinyl-N-ethyl fomiamide and N-vinyl formamide;
- said reaction mixture to be used to form a contact lens.
Dependencies are inferred from the claim text.