Hydrophilic macromers and hydrogels comprising the same

A composition comprising at least one hydrophilic silicone macromer of the Formula:

• where R2 is a group defined as MfDgThQiR6j with M=R7R8R9SiZ1/2, D=R10D11SiZ2/2, T=R12SiZ3/2, Q=SiZ4/2, R6=—(CH2)1/2(R13)k(CH2)1/2—;
• R1 is independently selected from —OH, —OC(O)R15, Y, or —OR15;
• R5 is independently selected from hydrogen, a —C(O)R15 group, Y, or a monovalent hydrocarbon radical having from about 1 to about 40 carbon atoms that optionally contain a heteroatom and/or a hydroxyl group;
• at least one of R1 and R5 is Y;
• Y is a free radical polymerizable group;
• Z is O or CH2 group subject to the limitation that the macromer contains an even number of O1/2 and an even number of (CH2)1/2 groups and they both are all paired in the molecule;
• R3 is a trivalent hydrocarbon radical having 1 to about 40 carbon atoms that optionally contain a heteroatom and/or a hydroxyl group;
• R7, R8, R9, R10, R11R12 and R15 are each independently selected from OR14, a monovalent hydrocarbon radical having 1 to about 20 carbon atoms that optionally contain a heteroatom and/or a hydroxyl group;
• R4 is a divalent, linear, or branched unsaturated or saturated hydrocarbon radical containing at least one and less than about 30 carbon atoms that optionally contain a heteroatom and/or a hydroxyl group;
• R13 is oxygen or divalent linear or branched unsaturated or saturated hydrocarbon radicals containing at least one and less than about 30 carbon atoms that optionally contain a heteroatoms and/or a hydroxyl group;
• R14 is a monovalent, linear or branched unsaturated or saturated hydrocarbon radical having 1 to about 20 carbon atoms that optionally contain a heteroatom and/or hydroxyl group;
• a+e>2;
• b, c, and d are zero or positive subject to the limitation 3<a+b+c+d+e<about 1000;
• d+e>1;
• f, g, h, i and j are 0 or positive subject to the limitation f+g+h+i+j<about 300;
• f+g+h+i is greater than 0;
• and k is 0 or 1.