Silica gel contact lenses surface modification method and preparation method of colorful contact lenses

A silicone gel contact lens, surface modification technology, applied in glasses/goggles, optics, instruments, etc., can solve the problems of insufficient hydrophilicity of silicone gel contact lenses, affecting the wearing effect, etc., to achieve improved wearability Wearing effect, improvement of wearing effect, effect of ensuring oxygen permeability

Active Publication Date: 2017-11-03
江苏彩康隐形眼镜有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a method for modifying the surface of silicone gel contact lenses and a method for preparing colored contact lenses thereof, so as to solve the problem that the hydrophilicity of silicone gel contact lenses is not good enough, thereby affecting the wearing effect

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  • Silica gel contact lenses surface modification method and preparation method of colorful contact lenses

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Embodiment 1

[0028] Example 1: Preparation of silicone gel contact lens lenses

[0029] The silicone gel contact lens used in the present invention can be a cast or turned silicone gel contact lens made by photopolymerization or thermal polymerization. The casting or turning molding process used can refer to common literature and industrial practice. The raw material used can be a silicon-containing prepolymer or a mixture of each monomer and a silicon-containing prepolymer. Preferably, the monomer used is a vinyl monomer containing amide (NH), or containing one or more functional groups of carboxyl (COOH) or hydroxyl (OH). For the preparation of silicon-containing prepolymers, please refer to U.S. Patent Nos. 4136250A, 5962548A, and 5563184A. In this example, the raw material formula used is: 26.97% of siloxane-containing macromonomers, 16.75% of TRIS (3-tris(methyl-siloxy)silylpropyl methacrylate) , 32.64% DMA (N,N-dimethylacrylamide), 22.64% denatured ethanol and 1.0% 2-hydroxy-2-methyl...

Embodiment 2

[0030] Example 2: Preparation of yellow contact lenses

[0031] Weigh 45 grams of 2-hydroxyethyl methacrylate, 0.8 grams of methacrylic acid, 1.5 grams of methyl methacrylate, 15.70 grams of ethyl lactate, 37.5 grams of cyclopentanone and 0.04 grams of azobisisobutylene. -0.6 g of mercaptoethanol, put it in a glass reaction flask and mix well, polymerize at 70 degrees for 6 hours, then add 0.04 g of methyl ether hydroquinone to the glass reaction flask, stir evenly and stop the reaction, with a gradient water content of biological high The synthesis of the polymer is complete.

[0032] Weigh 412 grams of the above-mentioned biopolymer, 88 grams of yellow iron oxide pigment, 3.1 grams of EFKA5054 additives, 2.2 grams of Byk307 additives, and 46 grams of cyclopentanone in a dispersing mill. Add appropriate grinding media and grind until the pigment particles are fine. The degree is less than 10μm, and the color coating slurry with gradient water content is prepared. Next, weigh 50 ...

Embodiment 3

[0034] Example 3: Preparation of purple contact lenses

[0035] Weigh 7.5 g of N-vinylpyrrolidone, 37.8 g of 2-hydroxyethyl methacrylate, 0.5 g of methacrylic acid, 0.4 g of acrylic acid, 1.4 g of methyl methacrylate, 16.1 g of ethyl lactate, and 35.7 g of pentanone, 0.035 g of azobisisobutyronitrile, 0.55 g of 2-mercaptoethanol, put them in a glass reaction flask and mix well, polymerize at 75°C for 5 hours, and then add methyl ether hydroquinone to the glass reaction flask Stir 0.033 g uniformly and stop the reaction, and the biopolymer with gradient water content is synthesized.

[0036] Weigh 404 grams of the above-mentioned biopolymer, 132 grams of high-purity purple pigment, 9.28 grams of EFKA5054 additives, 6.24 grams of Byk307 additives, and 26 grams of cyclopentanone in a dispersing mill. Add an appropriate amount of grinding media and grind until the pigment particles are fine. The degree should be less than 10 μm, and a color coating slurry with a gradient water content...

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Abstract

The invention provides a silica gel contact lenses surface modification method and a preparation method of colorful contact lenses. The modification method comprises the following steps: coating the surface of silica gel contact lenses with a coating of a network pattern structure with a gradient water content, wherein the water content of the coating is higher than that of the substrate of the silica gel contact lenses, the coating is colorful or colorless, the coating is made of a biopolymer, and the silica gel contact lenses are made of a silicon-containing prepolymer or a mixture of monomers with the silicon-containing prepolymer in a polymerization manner. The surface properties of the silica gel contact lenses are improved by using the coating of the network structure with the gradient water content, the wearing effect is improved, the wearing dryness of colorful contact lenses is effectively reduced, and meanwhile the wearing comfort is also improved. The appropriate coating water content ensures exchange of a water liquid with ocular humor is ensured, meanwhile the oxygen permeability of contact lenses, appropriate moisture volatilization and moistening of the surface of the coating are ensured, and proteins can be prevented from deposition on the surface of the coating.

Description

Technical field [0001] The invention belongs to the technical field of contact lenses, and particularly relates to a method for surface modification of silicone gel contact lenses and a method for preparing colored contact lenses. Background technique [0002] The contact lens made of silicone gel greatly improves the oxygen permeability of the contact lens in order to meet the oxygen demand of ophthalmic nitrile, and greatly improves the wearing effect. It overcomes the limitation of the oxygen permeability of the hydrogel itself. It is becoming more and more popular with consumers. However, silicone gel has its own water content limitation, so the hydrophilicity of its surface is not good enough, which affects the wearing effect. The poor hydrophilicity of the contact lens surface will bring a series of risks, including dryness, low comfort, and protein precipitation. Dryness is the most common problem in contact lenses (contact lenses). Four out of five people will feel dryn...

Claims

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Application Information

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IPC IPC(8): G02C7/04
CPCG02C7/046G02C7/049
Inventor 陈永军叶东平
Owner 江苏彩康隐形眼镜有限公司
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