| 主权项 |
1. A silicone hydrogel formed from a reaction mixture comprising,
(a) from about 37 to 70 wt % of at least one slow reacting monomer selected from the group consisting of N-vinylamide monomers of Formula I, vinyl pyrrolidones of Formula II-IV, and N-vinyl piperidones of Formula V: wherein in Formula I through V R is H or methyl; R1, R2, R3, R6, R7, R10, and R11 are independently selected from the group consisting of H, CH3, CH2CH3, CH2CH2CH3, C(CH3)2; R4 and R8 are independently selected from the group consisting of CH2, CHCH3 and C(CH3); R5 is selected from H, methyl, ethyl; and R9 is selected from CH═CH2, CCH3═CH2, and CH═CHCH3; (b) at least one mono (meth)acryloxyalkyl polydialkylsiloxane monomer of Formula VII or the styryl polydialkylsiloxane monomer of Formula VIII: wherein in Formula VI through VIII R12 is H or methyl; X is O or NR16; each R14 is independently a C1 to C4 alkyl which may be fluorine substituted, or phenyl; R15 is a C1 to C4 alkyl; R13 is a divalent alkyl group, which may further be functionalized with a group selected from the group consisting of ether groups, hydroxyl groups, carbamate groups and combinations thereof; a is 3 to 50; R16 is selected from H, C1-C4, which may be further substituted with one or more hydroxyl groups; (c) at least one hydroxyalkyl (meth)acrylate or (meth)acrylamide monomer of Formula IX or a styryl compound of Formula X wherein R17 is H or methyl, Q is O or NR16, R16 is a H, or C1 to C4 alkyl, which may be further substituted with at least one OH; R18 is selected from C2-C4 mono or dihydroxy substituted alkyl, and poly(ethylene glycol) having 1-10 repeating units; wherein said at least one hydroxyalkyl (meth)acrylate or (meth)acrylamide monomer and said slow reacting monomer are present in mole percents which form a molar ratio between 0.15 and 0.4; and (d) at least one crosslinking monomer. |
