C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 33/10 (2006.01) B29C 71/00 (2006.01) B29D 11/00 (2006.01) C08F 2/00 (2006.01) C08F 2/06 (2006.01) C08L 63/02 (2006.01) G01N 25/48 (2006.01) G02B 1/04 (2006.01) G02C 7/04 (2006.01)
Patent
CA 2128118
Shaped hydrogel articles such as soft contact lenses are prepared by the steps of: (1) molding or casting a polymerization mixture comprising: (a) ~a monomer mixture comprising a major proportion of one or more hydrophilic monomers such as 2-hydroxyethyl methacrylate, and one or more cross-linking monomers; and (b) ~an inert, displaceable diluent selected from the group consisting of: (i) ~ethoxylated alkyl glucoside; (ii) ~ethoxylated bisphenol A; (iii) ~polyethylene glycol; (iv) ~mixture of propoxylated and ethoxylated alkyl glucoside; (v) ~single phase mixture of ethoxylated or propox- ylated alkyl glucoside and C2-12 dihydric alcohol; (vi) ~adduct of .epsilon.-caprolactone and C2-6alkanediols and triols; (vii) ~ethoxylated C3-6alkanetriol; and (viii) ~mixtures of one or more of (i) through (vii), under conditions to polymerize said monomer mixture to produce a shaped gel of a copolymer of said monomers and said diluent; and (2) thereafter replacing said diluent with water.
Elliott Laura D.
Ford James D.
Molock Frank F.
Nunez Ivan M.
Johnson & Johnson Vision Care Inc.
Johnson & Johnson Vision Products Inc.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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