Siloxane macromonomers
First Claim
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1. An oil soluble, non-surface active siloxane macromonomer represented by the following structural formula:
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space="preserve" listing-type="equation">B--E--(T).sub.mwherein each B is a polymerizable end group containing at least one ethylenically unsaturated group and a functional group which reacts to form an ester, amide, urea, urethane, carbonate or epoxy type linkage with the rest of the macromonomer;
E is a functionalized chain transfer agent;
T has the following structural formula;
##STR13## wherein n is an integer from 1 to 6, A is O, ##STR14## NH or ##STR15## R1 is H or CH3 ; and
each R2 is independently selected from a C1 -C8 alkyl group, a phenyl group and a group of the following structural formula;
##STR16## wherein each Y is independently selected from a C1 -C8 alkyl group, a phenyl group and a (R)3 OSi-group wherein each R is independently a lower alkyl group; and
m is an integer from 1 to 120.
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Abstract
Siloxane macromonomers are disclosed which can be copolymerized with hydrophilic monomers or hydrophobic monomers to prepare polymeric materials useful as biomedical devices. The copolymers made from hydrophilic monomers exhibit good oxygen permeability and are particularly suitable for use in contact lenses.
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Citations
26 Claims
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1. An oil soluble, non-surface active siloxane macromonomer represented by the following structural formula:
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space="preserve" listing-type="equation">B--E--(T).sub.mwherein each B is a polymerizable end group containing at least one ethylenically unsaturated group and a functional group which reacts to form an ester, amide, urea, urethane, carbonate or epoxy type linkage with the rest of the macromonomer;
E is a functionalized chain transfer agent;T has the following structural formula;
##STR13## wherein n is an integer from 1 to 6, A is O, ##STR14## NH or ##STR15## R1 is H or CH3 ; and
each R2 is independently selected from a C1 -C8 alkyl group, a phenyl group and a group of the following structural formula;
##STR16## wherein each Y is independently selected from a C1 -C8 alkyl group, a phenyl group and a (R)3 OSi-group wherein each R is independently a lower alkyl group; andm is an integer from 1 to 120. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An in soluble intermediate polymer useful in the preparation of siloxane macromonomers comprised of the following structural formula:
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space="preserve" listing-type="equation">E(T).sub.mwherein E is a functional chain transfer agent and T has the following structural formula;
##STR21## wherein n is an integer, from i to 6, A is O, ##STR22## NH or ##STR23## R is H or CH3 ; and
each R2 is independently selected from a C1 -C8 alkyl group, a phenyl group and a group of the following structural formula;
##STR24## whereln each Y is independently selected from a C1 -C8 alkyl group, a phenyl group and a (R)3 OSi- group wherein each R is independently a lower alkyl group;and m is an integer from I to 120. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification