US5409731A
Expired / Lapsed
US
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Method for imparting a hydrophilic nature to a contact lens
Assignee: Tomei Sangyo KK
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Filing: 1992-10-08
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Granted: 1995-04-25
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Expires: 2012-10-08
Abstract
Abstract A method for imparting a hydrophilic nature to a contact lens, which comprises dipping a contact lens in a solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens and a crosslinking agent in an amount effective to crosslink the amino group-containing polymer, and forming a hydrophilic layer of the amino group-containing polymer crosslinked on the surface of the contact lens.
Inventors
- 👤 Akira Nakagawa
- 👤 Teruyo Komura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:13
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
72 words
A method for imparting a hydrophilic nature to a contact lens, which comprises dipping a contact lens in an aqueous solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens and a crosslinking agent in an amount effective to crosslink the amino group-containing polymer, and forming a hydrophilic layer of the amino group-containing polymer crosslinked on the surface of the contact lens.
Claim 2
Independent Claim
72 words
A method for imparting a hydrophilic nature to a contact lens, which comprises dipping a contact lens in an aqueous solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens and a crosslinking agent in an amount effective to crosslink the amino group-containing polymer, and forming a hydrophilic layer of the amino group-containing polymer crosslinked on the surface of the contact lens.
Claim 3
Dependent Claim
17 words
The method according to claim 1, wherein the amino group-containing polymer is water-soluble collagen or its derivative.
Claim 4
Dependent Claim
16 words
The method according to claim 1, wherein the amino group-containing polymer is a derivative of polysaccharide.
Claim 5
Dependent Claim
13 words
The method according to claim 1, wherein the crosslinking agent is a glutaraldehyde.
Claim 6
Dependent Claim
23 words
The method according to claim 1, wherein the crosslinking agent is a polyfunctional compound reactive with at least two amino groups for crosslinking.
Claim 7
Dependent Claim
38 words
The method according to claim 1, wherein the amino group-containing polymer has carboxyl groups in addition to the amino groups, and the crosslinking agent is a condensed reagent capable of crosslinking the amino groups to the carboxyl groups.
Claim 8
Dependent Claim
13 words
The method according to claim 6, wherein the crosslinking agent is a carbodiimide.
Claim 9
Independent Claim
103 words
A method for imparting a hydrophilic nature to a contact lens, which comprises contacting a contact lens to an aqueous solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens, to have the amino group-containing polymer adsorbed on the surface of the contact lens, and then contacting the contact lens to an aqueous solution containing a crosslinking agent in an amount effective to crosslink such an amino group-containing polymer, to crosslink the amino group-containing polymer on the surface of the contact lens and thereby to impart a hydrophilic nature to the contact lens.
Claim 10
Independent Claim
103 words
A method for imparting a hydrophilic nature to a contact lens, which comprises contacting a contact lens to an aqueous solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens, to have the amino group-containing polymer adsorbed on the surface of the contact lens, and then contacting the contact lens to an aqueous solution containing a crosslinking agent in an amount effective to crosslink such an amino group-containing polymer, to crosslink the amino group-containing polymer on the surface of the contact lens and thereby to impart a hydrophilic nature to the contact lens.
Claim 11
Dependent Claim
17 words
The method according to claim 8, wherein the amino group-containing polymer is water-soluble collagen or its derivative.
Claim 12
Dependent Claim
16 words
The method according to claim 8, wherein the amino group-containing polymer is a derivative of polysaccharide.
Claim 13
Dependent Claim
13 words
The method according to claim 8, wherein the crosslinking agent is a glutaraldehyde.
Claim 14
Dependent Claim
23 words
The method according to claim 8, wherein the crosslinking agent is a polyfunctional compound reactive with at least two amino groups for crosslinking.
Claim 15
Dependent Claim
38 words
The method according to claim 8, wherein the amino group-containing polymer has carboxyl groups in addition to the amino groups, and the crosslinking agent is a condensed reagent capable of crosslinking the amino groups to the carboxyl groups.
Claim 16
Dependent Claim
13 words
The method according to claim 13, wherein the crosslinking agent is a carbodiimide.
Claim 17
Dependent Claim
16 words
The method according to claim 1 wherein the contact lens is a hard, hydrophobic contact lens.
Claim 18
Dependent Claim
17 words
The method according to claim 1 wherein the contact lens is a water nonabsorptive soft contact lens.
Claim 19
Dependent Claim
16 words
The method according to claim 8 wherein the contact lens is a hard, hydrophobic contact lens.
Claim 20
Dependent Claim
17 words
The method according to claim 8 wherein the contact lens is a water nonabsorptive soft contact lens.
Claim 21
Independent Claim
74 words
A method for imparting a hydrophilic nature to a contact lens, which consists essentially of dipping a contact lens in an aqueous solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens and a crosslinking agent in an amount effective to crosslink the amino group-containing polymer, and forming a hydrophilic layer of the amino group-containing polymer crosslinked on the surface of the contact lens.
Claim 22
Independent Claim
74 words
A method for imparting a hydrophilic nature to a contact lens, which consists essentially of dipping a contact lens in an aqueous solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens and a crosslinking agent in an amount effective to crosslink the amino group-containing polymer, and forming a hydrophilic layer of the amino group-containing polymer crosslinked on the surface of the contact lens.
Claim 23
Independent Claim
105 words
A method for imparting a hydrophilic nature to a contact lens, which consists essentially of contacting a contact lens to an aqueous solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens, to have the amino group-containing polymer adsorbed on the surface of the contact lens, and then contacting the contact lens to an aqueous solution containing a crosslinking agent in an amount effective to crosslink such an amino group-containing polymer, to crosslink the amino group-containing polymer on the surface of the contact lens and thereby to impart a hydrophilic nature to the contact lens.
Claim 24
Independent Claim
105 words
A method for imparting a hydrophilic nature to a contact lens, which consists essentially of contacting a contact lens to an aqueous solution containing a water-soluble amino group-containing polymer in an amount effective to impart a hydrophilic nature to the contact lens, to have the amino group-containing polymer adsorbed on the surface of the contact lens, and then contacting the contact lens to an aqueous solution containing a crosslinking agent in an amount effective to crosslink such an amino group-containing polymer, to crosslink the amino group-containing polymer on the surface of the contact lens and thereby to impart a hydrophilic nature to the contact lens.
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