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Surface modification method of silicone gel contact lens and preparation method of color contact lens thereof

A silicone gel contact lens and surface modification technology, which is applied in glasses/goggles, optical components, instruments, etc., can solve the problems of affecting the wearing effect and the hydrophilicity of silicone gel contact lenses is not good enough, so as to improve Wearing effect, improvement of wearing effect, effect of securing oxygen permeability

Active Publication Date: 2019-03-29
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

Method used

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  • Surface modification method of silicone gel contact lens and preparation method of color contact lens thereof

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Experimental program
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Embodiment 1

[0028] Embodiment 1: preparation of silicone gel contact lens lens

[0029] The silicone gel contact lens used in the present invention can be a casting or turning silicone gel contact lens made by photopolymerization or thermal polymerization. The casting or turning forming process used can refer to common literature and industrial practice. The raw material used may be a silicon-containing prepolymer or a mixture of various monomers and a silicon-containing prepolymer. Preferably, the monomer used is a vinyl monomer containing amide (NH), or one or more functional groups of carboxyl group (COOH) or hydroxyl group (OH). For the preparation of silicon-containing prepolymers, reference can be made to US Patents 4,136,250A, 5,962,548A, and 5,563,184A. In this embodiment, the raw material formula used is: 26.97% of siloxane-containing macromers, 16.75% of TRIS (3-tris(methyl-silyloxy) silyl propyl methacrylate) , 32.64% of DMA (N, N-dimethylacrylamide), 22.64% of denatured eth...

Embodiment 2

[0030] Embodiment 2: the preparation of yellow contact lens

[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 azobisisobutyronitrile, 2 - 0.6 g of mercaptoethanol, placed in a glass reaction bottle and mixed evenly, polymerized at 70 degrees for 6 hours, then added 0.04 g of methyl ether hydroquinone in the glass reaction bottle, stirred evenly and stopped the reaction, a biological high with gradient water content The polymer is synthesized.

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

Embodiment 3

[0034] Embodiment 3: the preparation of purple contact lens

[0035] Weigh 7.5 grams of N-vinylpyrrolidone, 37.8 grams of 2-hydroxyethyl methacrylate, 0.5 grams of methacrylic acid, 0.4 grams of acrylic acid, 1.4 grams of methyl methacrylate, 16.1 grams of ethyl lactate, ring 35.7 grams of pentanone, 0.035 grams of azobisisobutyronitrile, and 0.55 grams of 2-mercaptoethanol were placed in a glass reaction bottle and mixed evenly, polymerized at 75 degrees for 5 hours, and then methyl ether hydroquinone was added to the glass reaction bottle 0.033 g was stirred evenly and the reaction was stopped, and the biopolymer with gradient water content was synthesized.

[0036] Weigh 404 grams of the above-mentioned biopolymer, 132 grams of high-purity purple pigment, 9.28 grams of EFKA5054 additive, 6.24 grams of Byk307 additive, and 26 grams of cyclopentanone, and place them in a dispersion grinder, add an appropriate amount of grinding media, and grind until the pigment particles are...

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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, in particular to a method for modifying the surface of a silicone gel contact lens and a method for preparing colored contact lenses. Background technique [0002] The contact lens made of silicone gel greatly improves the wearing effect because it greatly improves the oxygen permeability of the contact eye in order to meet the oxygen demand of the eye. It overcomes the limitation of the oxygen permeability of the hydrogel itself, and 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 contact lens surfaces can 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 dryness. The dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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