# US 10,246,541 B2 · Ophthalmic lens and method for making the same

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- Number: US 10,246,541 B2
- Document ID: US10246541B2
- Status: Granted
- Kind: B2
- Application number: 15/490,470
- Filed: 2017-04-18
- Published: 2018-08-16
- Granted: 2019-04-02
- Earliest claimed: 2017-02-14
- Assignees: MiiCs & Partners (Shenzhen) Co., Ltd.
- Applicants: MiiCs & Partners (Shenzhen) Co., Ltd.
- Inventors: Hsiu-Wen Chien
- Web page: https://patentgrep.com/patent/US10246541B2

## CPC

- C08F 230/02: containing phosphorus
- B29D 11/00134: {Curing of the contact lens material}
- C08J 3/28: Treatment by wave energy or particle radiation
- G02B 1/041: {Lenses}
- G02B 1/043: {Contact lenses}
- B29K 2079/00: Use of polymers having nitrogen, with or without oxygen or carbon only, in the main chain {, not provided for in groups B29K2061/00 - B29K2077/00}, as moulding material
- B29K 2995/0018: having particular optical properties, e.g. fluorescent or phosphorescent
- C08F 2800/20: as weight or mass percentages
- C08J 2343/02: Homopolymers or copolymers of monomers containing phosphorus
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

## Abstract

A method for making a biodegradable ophthalmic lens includes steps of mixing poly[bis(methacrylate)phosphazene], hydrophilic monomers, and a photoinitiator to form a mixture; feeding the mixture into a mold, and heating or exposing the mixture to ultraviolet radiation, thereby causing the poly[bis(methacrylate)phosphazene] to function as a cross-linking agent. Such cross-linking agent undergoes a polymerization reaction with the hydrophilic monomers and the photoinitiator to form a polyphosphazenes hydrogel; and the polyphosphazenes hydrogel is then removed from the mold.

## Claims

### Claim 1

A method for making an ophthalmic lens comprising:
mixing poly[bis(methacrylate)phosphazene], hydrophilic monomers, and a photoinitiator to form a mixture, wherein the poly[bis(methacrylate)phosphazene] has a mass percentage of 3.2% to 3.5% of a total mass of the mixture, the hydrophilic monomers have a mass percentage of 96% of the total mass of the mixture, the photoinitiator has a mass percentage of 0.5% to 0.8% of the total mass of the mixture;
feeding the mixture into a mold, and heating or exposing the mixture to ultraviolet radiation, thereby causing the poly[bis(methacrylate)phosphazene] to function as a cross-linking agent which undergoes a polymerization reaction with the hydrophilic monomers and the photoinitiator to form a polyphosphazenes hydrogel; and
separating the polyphosphazenes hydrogel from the mold, thereby the polyphosphazenes hydrogel forming the ophthalmic lens.

### Claim 2 (depends on 1)

The method of claim 1, wherein the hydrophilic monomers are selected from a group consisting of N,N′-dimethylacrylamide, polyethylene glycol maleate, tris(trimethylsilyl)silane, and polydimethylsiloxane, or any combination thereof.

### Claim 3 (depends on 1)

The method of claim 1, wherein the photoinitiator is azodiisobutyronitrile.

### Claim 4 (depends on 1)

The method of claim 1, wherein a solvent is further added to the mixture, the mixture and the solvent are fed into the mold together for the polymerization reaction, the solvent and the mixture are in a ratio less than or equal to 7:20 by weight.

### Claim 5 (depends on 4)

The method of claim 4, wherein the solvent is 1-hexanol.

### Claim 6 (depends on 1)

The method of claim 1, wherein a time period for the polymerization reaction is from 10 min to 30 min.

### Claim 7 (depends on 1)

The method of claim 1, further comprising:
washing the polyphosphazenes hydrogel.

### Claim 8 (depends on 7)

The method of claim 7, wherein the polyphosphazenes hydrogel is washed by distilled water.