| 摘要 |
A contact lens consists of a copolymer prepd. from a monomer mixt. contg. (a) 5-65% (wt.) of a fluorinated monomer of formula (I): CH2=CX-COO-Yn-CH2CH2(CF2)7CF3 (I) (where X is H or Me; Y is -CH2CH2O-, -(CH2)3O-, -CHMeCH2O- or -CH2CHMeO-; n is 1, 2 or 3); (b) 10-60% of a siloxanyl (meth)acrylate; (c) 5-45% of an alkyl methacrylate; (d) 5-15% of a hydrophilic monomer; (e) 0.1-15% of a cross-linking agent. More specifically (b) is trimethylsiloxydimethylsilylpropyl, bis(trimethylsiloxy) methylsilylpropyl, tris(trimethylsiloxy)silylpropyl, bis(bis(trimethylsiloxy)siloxanyl)trimethylsiloxy-silylpropyl, etc. (c) is methyl, ethyl, propyl, butyl, cyclohexyl or 4-tert-butylcyclohexyl methacrylate. (d) is acrylamide methacrylamide, N,N-dimethylacrylamide, N,N-dimethylmethacrylamide, acrylic acid or methacrylic acid. (e) is a polyol di- or tri(meth)acrylate (pref. of ethylene glycol, diethylene glycol , triethylene glycol, tetraethylene glycol, polyethylene glycol or trimethylolpropane), allyl (meth)acrylate, etc, or a cpd. of formula (II) or (III): R'O((CH2)kOx)-(CH2)m-SiMe2-(CH2)m-(O(CH2)k)x-OR' (II) R'O((CH2)kO)x(CH2)m(SiMe2O)p (SiPh2O)qSiPh2(CH2)m(O(CH2)k)xOR' (III) (where k is 1-3; x is 0 or 1; m is 0-3; n is 9-199; (p+q) is 11-139; p = at least 0; q is at least 0; R' is a gp. of formula (IV): R2 is H Me). - Contact lenses made from the copolymer have good oxygen permeability hardness and water wettability. @(40pp Dwg.No.0/0)@. |
