Hydrophilized polydiorganosiloxane vinylic crosslinkers and uses thereof
The invention provides a hydrophilized polydiorganosiloxane vinylic crosslinker which comprises (1) a polydiorganosiloxane polymer chain comprising dimethylsiloxane units and hydrophilized siloxane units each having one methyl substituent and one monovalent C 4 -C 40 organic radical substituent having two to six hydroxyl groups, wherein the molar ratio of the hydrophilized siloxane units to the dimethylsiloxane units is from about 0.035 to about 0.15, and (2) two terminal (meth)acryloyl groups. The hydrophilized polydiorganosiloxane vinylic crosslinker has a number average molecular weight of from about 3000 Daltons to about 80,000 Daltons. The present invention is also related to a silicone hydrogel contact lens, which comprises repeating units derived from a hydrophilized polydiorganosiloxane vinylic crosslinker of the invention.
1. A polydiorganosiloxane vinylic crosslinker, comprising: (1) a polydiorganosiloxane polymer chain comprising dimethylsiloxane units and siloxane unit having one methyl substituent and one monovalent C 4 -C 40 organic radical substituent having two to six hydroxyl groups, wherein the molar ratio of the hydrophilized siloxane units to the dimethylsiloxane units is from about 0.035 to about 0.15; (2) two terminal (meth)acryloyl groups, wherein the polydiorganosiloxane vinylic crosslinker has a number average molecular weight of from about 3000 Daltons to about 80,000 Daltons.
2. The polydiorganosiloxane vinylic crosslinker of claim 1 , wherein the polydiorganosiloxane vinylic crosslinker is a polymer of formula (1)
in which:
υ1 is an integer of from 30 to 500 and ω1 is an integer of from 1 to 75, provided that ω1/υ1 is from about 0.035 to about 0.15;
X 0 is O or NR′ in which R′ is hydrogen or C 1 -C 10 -alkyl;
R 1 is hydrogen or methyl;
R 2 and R 3 independently of each other are a substituted or unsubstituted C 1 -C 10 alkylene divalent radical or a divalent radical of —R 5 —O—R 6 — in which R 5 and R 6 independently of each other are a substituted or unsubstituted C 1 -C 10 alkylene divalent radical;
R 4 is a monovalent radical of any one of formula (2) to (6)
q1 is zero or 1;
n1 is an integer of 2 to 4;
n2 is an integer of 1 to 5;
n3 is an integer of 3 to 6;
n4 is an integer of 2 to 5
R 7 is hydrogen or methyl;
R 8 and R 9 independent of each other are a C 2 -C 6 hydrocarbon radical having (n2+1) valencies;
R 10 is ethyl or hydroxymethyl;
R 11 is methyl or hydromethyl;
R 12 is hydroxyl or methoxy;
X 1 is a sulfur linkage of —S— or a tertiary amino linkage of —NR 13 — in which R 13 is C 1 -C 3 alkyl, hydroxylethyl, hydroxypropyl, or 2,3-dihydroxypropyl; and
X 2 is an amide linkage of
in which R 14 is hydrogen or C 1 -C 10 alkyl.
3. The polydiorganosiloxane vinylic crosslinker of claim 2 , wherein R 4 is a monovalent radical of formula (2).
4. The polydiorganosiloxane vinylic crosslinker of claim 3 , wherein R 4 is a monovalent radical of any one of formula (2a) to (2y)
in which q1 is zero or 1, n1 is an integer of 2 to 4, R 7 is hydrogen or methyl.
5. The polydiorganosiloxane vinylic crosslinker of claim 2 , wherein R 4 is a monovalent radical of formula (3).
6. The polydiorganosiloxane vinylic crosslinker of claim 5 , wherein R 4 is a monovalent radical of any one of formula (3a) to (3y)
in which X 2 is an amide linkage of
in which R 14 is hydrogen or C 1 -C 10 alkyl.
7. The polydiorganosiloxane vinylic crosslinker of claim 2 , wherein R 4 is a monovalent radical of formula (4).
8. The polydiorganosiloxane vinylic crosslinker of claim 7 , wherein R 4 is a monovalent radical of formula (4a) or (4b)
9. The polydiorganosiloxane vinylic crosslinker of claim 2 , wherein R 4 is a monovalent radical of formula (5).
10. The polydiorganosiloxane vinylic crosslinker of claim 9 , wherein R 4 is a monovalent radical of any one of formula (5a) to (5c)
11. The polydiorganosiloxane vinylic crosslinker of claim 2 , wherein R 4 is a monovalent radical of formula (6).
12. The polydiorganosiloxane vinylic crosslinker of claim 11 , wherein in formula (6) n1 is 3 and q1 is 1.
13. The polydiorganosiloxane vinylic crosslinker of claim 3 , wherein in formula (1) X 0 is O.
14. The polydiorganosiloxane vinylic crosslinker of claim 3 , wherein in formula (1) X 0 is NR′ in which R′ is hydrogen or C 1 -C 10 -alkyl.
15. The polydiorganosiloxane vinylic crosslinker of claim 5 , wherein in formula (1) X 0 is O.
16. The polydiorganosiloxane vinylic crosslinker of claim 5 , wherein in formula (1) X 0 is NR′ in which R′ is hydrogen or C 1 -C 10 -alkyl.
17. The polydiorganosiloxane vinylic crosslinker of claim 7 , wherein in formula (1) X 0 is O.
18. The polydiorganosiloxane vinylic crosslinker of claim 7 , wherein in formula (1) X 0 is NR′ in which R′ is hydrogen or C 1 -C 10 -alkyl.
19. The polydiorganosiloxane vinylic crosslinker of claim 9 , wherein in formula (1) X 0 is O.
20. The polydiorganosiloxane vinylic crosslinker of claim 9 , wherein in formula (1) X 0 is NR′ in which R′ is hydrogen or C 1 -C 10 -alkyl.
21. The polydiorganosiloxane vinylic crosslinker of claim 11 , wherein in formula (1) X 0 is O.
22. The polydiorganosiloxane vinylic crosslinker of claim 11 , wherein in formula (1) X 0 is NR′ in which R′ is hydrogen or C 1 -C 10 -alkyl.
23. The polydiorganosiloxane vinylic crosslinker of claim 2 , wherein the polydiorganosiloxane vinylic crosslinker has a number average molecular weight of from about 4000 Daltons to about 50,000 Dalton.
24. The polydiorganosiloxane vinylic crosslinker of claim 2 , wherein the polydiorganosiloxane vinylic crosslinker has a number average molecular weight of from about 5000 Daltons to about 25,000 Daltons.
25. The polydiorganosiloxane vinylic crosslinker of claim 2 , wherein the polydiorganosiloxane vinylic crosslinker has a number average molecular weight of from about 6000 Daltons to about 18,000 Daltons.