Patent US4640941A successfully refreshed from Google Patents.
US4640941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogels containing siloxane comonomers
Assignee: Alcon Vision LLC
•
Filing: 1986-01-07
•
Granted: 1987-02-03
•
Expires: 2006-01-07
Abstract
Abstract Hydrogel polymeric material, suitable for preparing optical devices such as contact lenses. The material is of improved oxygen permeability and mechanical properties in comparison with conventional hydrogels. It comprises, in addition to the hydrogel material, from about 5% to about 60% by weight of a siloxane comonomer containing both an aromatic ring and vinyl functionality. Its cooperation and combination of performance characteristics with traditional hydrogel forming monomers provides a very useful polymeric material for making lenses of the soft hydrogel type.
Inventors
- 👤 Joonsup Park
- 👤 Joseph J. Falcetta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:07
CPC Classifications
C; C08; C08F; C08F30/00; C08F30/04; C08F30/08; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
120 words
A hydrogel polymeric material comprising from about 40% to about 95% of hydrogel forming comonomer material, and from about 5% to about 60% by weight of a siloxane monomer having the formula: ##STR4## where (1) "A" is selected from the group consisting of: ##STR5## where m is a number and is from 2-4; (2) R is hydrogen or methyl; (3) X and Y are selected from the group consisting of C 1 to C 5 alkyl groups, phenyl groups and W groups; (4) W is a group of the structure ##STR6## (5) Z is selected from the group consisting of C 1 to C 5 alkyl groups and phenyl groups; and (6) n is an integer from zero to five.
Claim 2
Dependent Claim
120 words
A hydrogel polymeric material comprising from about 40% to about 95% of hydrogel forming comonomer material, and from about 5% to about 60% by weight of a siloxane monomer having the formula: ##STR4## where (1) "A" is selected from the group consisting of: ##STR5## where m is a number and is from 2-4; (2) R is hydrogen or methyl; (3) X and Y are selected from the group consisting of C 1 to C 5 alkyl groups, phenyl groups and W groups; (4) W is a group of the structure ##STR6## (5) Z is selected from the group consisting of C 1 to C 5 alkyl groups and phenyl groups; and (6) n is an integer from zero to five.
Claim 3
Dependent Claim
12 words
The polymeric material of claim 1 wherein A is an ester group.
Claim 4
Dependent Claim
12 words
The polymeric material of claim 1 wherein A is an amide group.
Claim 5
Dependent Claim
12 words
The polymeric material of claim 1 wherein A is a ureido group.
Claim 6
Dependent Claim
12 words
The polymeric material of claim 1 wherein X and Y are methyl.
Claim 7
Dependent Claim
10 words
The polymeric material of claim 1 wherein W is trimethylsiloxyl.
Claim 8
Dependent Claim
10 words
The polymeric material of claim 1 wherein W is pentamethylsiloxyl.
Claim 9
Dependent Claim
31 words
The polymeric material of claim 1 wherein A is an ester group, R is methyl, X and Y are OSi(CH 3 ) 3 , Z is methyl, and N is 1.
Claim 10
Dependent Claim
26 words
The polymeric material of claim 1 wherein the hydrogel forming monomer is a hydroxyalkyl acrylate or methacrylate of a lower C 1 to C 8 alkyl.
Claim 11
Dependent Claim
15 words
The polymeric material of claim 9 wherein the hydroxy alkyl monomer is hydroxy ethyl methacrylate.
Claim 12
Dependent Claim
28 words
The polymeric material of claim 9 wherein the hydroxy alkyl acrylate or methacrylate is from about 75% to about 90% by weight of the hydrogel forming comonomer material.
Claim 13
Dependent Claim
14 words
The polymeric material of claim 1 wherein the hydrogel forming monomer is N-vinyl pyrrolidone.
Claim 14
Dependent Claim
20 words
The polymeric material of claim 1 which includes from about 0.1% by weight to about 5% by weight cross-linking agent.
Claim 15
Dependent Claim
52 words
The polymeric material of claim 1 which includes from about 0% by weight to about 40% by weight of a property modifying organic hydrophobic monomer selected from the group consisting of C 1 to C 8 alkyl methacrylates and alkylates, cycloalkyl methacrylates and alkylates, styrene, t-butyl sytrene and other ring substituted styrenes.
Claim 16
Dependent Claim
13 words
The polymeric material of claim 14 wherein the hydrophobic monomer is methyl methacrylate.
Claim 17
Dependent Claim
27 words
The polymeric material of claim 15 wherein the methyl methacrylate is present in an amount of from 15% by weight to 30% by weight of said composition.
Claim 18
Dependent Claim
131 words
A contact lens of the hydrogel type having improved oxygen permeability and mechanical properties, comprising from 5% to 50% by weight of a siloxane monomer having the formula: ##STR7## where (1) "A" is selected from the group consisting of: ##STR8## where m is a number and is from 2-4; (2) R is hydrogen or methyl; (3) X and Y are selected from the group consisting of C 1 to C 5 alkyl groups, phenyl groups and W groups; (4) W is a group of the structure ##STR9## (5) Z is selected from the group consisting of C 1 to C 5 alkyl groups and phenyl groups; and (6) n is an integer from zero to five; and (7) from about 5% to about 50% by weight of a hydrogel forming comonomer.
Claim 19
Dependent Claim
131 words
A contact lens of the hydrogel type having improved oxygen permeability and mechanical properties, comprising from 5% to 50% by weight of a siloxane monomer having the formula: ##STR7## where (1) "A" is selected from the group consisting of: ##STR8## where m is a number and is from 2-4; (2) R is hydrogen or methyl; (3) X and Y are selected from the group consisting of C 1 to C 5 alkyl groups, phenyl groups and W groups; (4) W is a group of the structure ##STR9## (5) Z is selected from the group consisting of C 1 to C 5 alkyl groups and phenyl groups; and (6) n is an integer from zero to five; and (7) from about 5% to about 50% by weight of a hydrogel forming comonomer.
Claim 20
Dependent Claim
15 words
The lens of claim 17 wherein the siloxane comonomer is tris (trimethylsiloxy) silane (m,p-3-N-methacryloxymethylureido-1-N-methyl) phenylethane.
Claim 21
Dependent Claim
25 words
The lens of claim 18 wherein the hydrogel forming comonomer is a hydroxyalkyl acryate or methacrylate of a lower C 1 to C 8 alkyl.
Claim 22
Dependent Claim
22 words
The lens of claim 19 which includes from 0.1% to 5% cross-linking agent and from 0% to 40% of a hydrophobic monomer.
Claim 23
Dependent Claim
11 words
An intraocular lens comprising the hydrogel polymeric material of claim 1.
References Cited (Backward Citations)
US3220960A
Cited
US4095877A
Cited
US4343927A
Cited
US4182822A
Cited
US4130706A
Cited
US4139513A
Cited
US4246389A
Cited
US4433111A
Cited
US4436887A
Cited
US4440919A
Cited
US4550139A
Cited
US4451630A
Cited
US4492776A
Cited
US4528325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |