Silicone hydrogels comprising n-vinyl amides and hydroxyalkyl (meth)acrylates or (meth)acrylamides

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.