Patent EP0184924A2 successfully refreshed from Google Patents.
EP0184924A2
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EP
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Lens composition, articles and method of manufacture
Assignee: Paragon Optical Inc
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Filing: 1985-12-04
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Granted: —
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Expires: 2005-12-04
Abstract
Abstract A copolymer composition, especially suited for fabricating optical lenses comprising a copolymer of copolymerized comonomers which include about one to about forty percent by weight of an acryloxyalkylsilanol; about one to about seventy five percent by weight of a polyacryloxyalkylpolysiloxane; about one to about seventy five percent by weight of an siloxy substituted ester of acrylic or methacrylic acid; and from about one to about 35 percent by weight of an alkyl or cycloalkyl acrylate or methacrylate having from one to twenty carbon atoms. Contact lenses and contact lens buttons are formed of such copolymer of copolymerized comonomers by conventional techniques, by injection molding, and by compression molding.
Inventors
- 👤 Donald J. Ratkowski
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 01:05
CPC Classifications
C; C08; C08F; C08F230/00; C08F230/04; C08F230/08; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
259 words
A copolymer composition, especially suited for fabricating optical lenses, comprising a copolymer of copolymerized comonomers containing: a) about one to about forty percent by weight of an acrytoxyalkylsilanol having the structure wherein R = CH - or H-: X, Y = C 1 -C 6 alkyl; phenyl or Z n = 1-5 m = 1-3 Rl = C 1 -C 6 alkyl, cyclohexyl, or phenyl R2 = C 1 -C 6 alkyl, cyclohexyl, or phenyl R3 = C 1 -C 6 alkyl, cyclohexyl, or phenyl b) about one to about seventy five percent by weight of a polyacryloxyalkylpolysiloxane having the structure Wherein: R = CH 3 - or H-; m = 0-3 n = 1-5 X = C 1 -C 6 alkyl, cyclohexyl, phenyl or Z; Y = C 1 -C 6 alkyl, cyclohexyl, phenyl or Z; and c) about one to about seventy five percent by weight of a siloxy substituted ester of acrylic or methacrylic acid having the structure: Wherein R = CH 3 - or H-; X = C 1 -C 6 alkyl, cyclohexyl, phenyl or Z Y = C 1 -C 6 alkyl, cyclohexyl, phenyl or Z Rl = C l - C6 alkyl, cyclohexyl, or phenyl m = 0- 3 R2 = C l - C6 alkyl, cyclohexyl, or phenyl n = 1-5 R3 = C1-C6 alkyl, cyclohexyl, or phenyl R4 = C 1 -C 6 alkyl or cyclohexyl; and d) about one to about thirty-five percent by weight of an alkyl or cycloalkyl acrylate or methacrylate having from one to 20 carbon atoms.
Claim 2
Dependent Claim
259 words
A copolymer composition, especially suited for fabricating optical lenses, comprising a copolymer of copolymerized comonomers containing: a) about one to about forty percent by weight of an acrytoxyalkylsilanol having the structure wherein R = CH - or H-: X, Y = C 1 -C 6 alkyl; phenyl or Z n = 1-5 m = 1-3 Rl = C 1 -C 6 alkyl, cyclohexyl, or phenyl R2 = C 1 -C 6 alkyl, cyclohexyl, or phenyl R3 = C 1 -C 6 alkyl, cyclohexyl, or phenyl b) about one to about seventy five percent by weight of a polyacryloxyalkylpolysiloxane having the structure Wherein: R = CH 3 - or H-; m = 0-3 n = 1-5 X = C 1 -C 6 alkyl, cyclohexyl, phenyl or Z; Y = C 1 -C 6 alkyl, cyclohexyl, phenyl or Z; and c) about one to about seventy five percent by weight of a siloxy substituted ester of acrylic or methacrylic acid having the structure: Wherein R = CH 3 - or H-; X = C 1 -C 6 alkyl, cyclohexyl, phenyl or Z Y = C 1 -C 6 alkyl, cyclohexyl, phenyl or Z Rl = C l - C6 alkyl, cyclohexyl, or phenyl m = 0- 3 R2 = C l - C6 alkyl, cyclohexyl, or phenyl n = 1-5 R3 = C1-C6 alkyl, cyclohexyl, or phenyl R4 = C 1 -C 6 alkyl or cyclohexyl; and d) about one to about thirty-five percent by weight of an alkyl or cycloalkyl acrylate or methacrylate having from one to 20 carbon atoms.
Claim 3
Dependent Claim
45 words
A composition according to Claim 1 in which said copolymer of copolymerized comonomers includes as a comonomer an additional crosslinking monomer, and preferably said crosslinking monomer is present in an amount equal to about one percent to about twenty percent by weight of said copolymer.
Claim 4
Dependent Claim
16 words
A composition according to Claim 2 in which said additional crosslinking monomer is a polyol diacrylate.
Claim 5
Dependent Claim
24 words
A composition according to Claim 2 in which said - crosslinking monomer is selected from the group consisting of ethylene glycol-dimethacrylate and butylene glycol-dimethacrylate.
Claim 6
Dependent Claim
46 words
A composition according to Claim 1 or 2 in which said copolymer of comonomers includes as a comonomer a wetting monomer, and preferably said wetting comonomer is present in an amount equal to about one per cent to about twenty percent by weight of said copolymer.
Claim 7
Dependent Claim
26 words
A composition according to Claim 5 in which said wetting monomer is selected from the group consisting of methacrylic acid, acrylic acid, acrylamide, and 2-hydroxyethyl methacrylate.
Claim 8
Dependent Claim
41 words
A composition according to Claim 1 or 2 in which said comonomer mixture includes, prior to polymerization, a catalyst/initiator, and said catalyst/initiator is present in an amount equal to about 0.1 to about 1.0 percent by weight of said comonomer mixture.
Claim 9
Dependent Claim
26 words
A composition according to Claim 7 in which said catalyst/initiator is selected from the group consisting of benzoyl peroxide, t-butyl peroxypivalate, 2, 2'-azobis(isobutyronitrile), and 2, 2'-azobis(2,4-dimethylvaleronitrile).
Claim 10
Dependent Claim
85 words
A composition according to Claim 1 containing from about 3 to about 12 percent by weight of a wetting agent selected from the group consisting of methacrylic acid, acrylic acid, acrylamide, and 2-hydroxyethyl methacrylate; from about 3 to about 12 percent by weight of a crosslinker selected from the group consisting of ethylene glycol dimethacrylate and butylene glycol dimethacrylate; and from 0.1 to about 0.5 percent by weight of a catalyst/initiator selected from the group consisting of benzoyl peroxide, t-butyl peroxypivalate, 2,2'-azobis (isobutyronitrile), and 2'-azobis(2,4-dimethylvaleronitrile).
Claim 11
Dependent Claim
75 words
A composition according to Claim 9 containing from about three to about twenty percent by weight of said . acryloxyalkylsilanol, from three to about sixty percent by weight of said polyacryloxyalkylpolysiloxane; from about five to about sixty percent by weight of said siloxy substituted ester of acrylic or methacrylic acid; and from about five to about thirty percent by weight of said alkyl or cycloalkyl acrylate or methacrylate having from one to twenty carbon atoms.
Claim 12
Dependent Claim
21 words
As a new article of manufacture, an optical lens fabricated from the copolymer of copolymerized comonomers according to any preceding claim.
Claim 13
Dependent Claim
12 words
An article of manufacture according to Claim 11 comprising a contact lens.
Claim 14
Dependent Claim
22 words
As a new article of manufacture, a contact lens button fabricated from the copolymer of copolymerized comonomers according to any preceding claim.
Claim 15
Dependent Claim
17 words
As a new article of manufacture, a contact lens formed from the button according to Claim 13.
References Cited (Backward Citations)
No citation records indexed.
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