Silicone hydrogel, lens for eye and contact lens
AssigneeJohnson & Johnson Vision Care, Inc.
InventorsThomas L. Maggio, Michelle Carman Turnage, Kazuhiko Fujisawa, Masataka Nakamura
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Abstract
The present invention provides transparent silicone hydrogels with high acrylamide monomer content and an excellent balance between moisture content. The silicone hydrogels may be obtained by polymerizing a monomer mix containing a plurality of monomers, wherein the monomer mix comprises about 30 to about 98% by weight of at least one type of silicone monomer which is, and about 1 to about 50% by weight of at least one type of non-silicone type (meth)acrylamide monomer containing two or more hydroxyl groups within a molecule; wherein the weight percents are based upon the total amount of monomer components and polymer components in the monomer mix.
Claims19
A silicone hydrogel obtained by polymerizing a polymerization mix containing a plurality of monomers containing (a) about 30 to about 98 weight % of at least one silicone monomer represented by the general formulae (b1), (b2):
- wherein in the chemical formulae (b1) or (b2), R1 independently represents a hydrogen atom or a methyl group;
- R5 to R9 independently represent alkyl groups with between 1 and 20 carbon atoms or aryl groups with between 6 and 20 carbon atoms;
- and n is a natural number in the range from 1 to 50);
- and
- (b) about 1 to about 50 weight % of at least one non-silicone (meth)acrylamide monomer represented by
- wherein R1 is hydrogen or methyl;
- at least one of R14 and R15 is a C1-20 alkyl group substituted with at least one hydroxyl group, and
- with the proviso that when;
- i) one of R14 and R15 is hydrogen
- ii) the other of R14 and R15 is substituted with at least two hydroxyl groups,
- wherein said weight percent based upon total amount of monomer components and polymer components in the monomer mix and wherein the silicone (meth)acrylamide monomer and non-silicone (meth)acrylamide monomer are present in the monomer mix in an amount of about 90% or more by weight with respect to a total amount of the monomers in the monomer mix.
Dependencies are inferred from the claim text.