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Colored soft hydrophilic contact lens and its making method

A contact lens, soft technology, applied in the field of medical devices, can solve the problems of fading of the pigment layer, wearing comfort, not strong, etc.

Active Publication Date: 2013-04-24
JILIN REALCON CONTACT LENS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It also makes the surface of the lens smooth, which solves the problems of fading of the pigment layer and poor wearing comfort

Method used

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  • Colored soft hydrophilic contact lens and its making method
  • Colored soft hydrophilic contact lens and its making method
  • Colored soft hydrophilic contact lens and its making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1. Manufacture of coating materials for colored soft hydrophilic contact lenses.

[0045] Weigh 450 g of ethylene glycol monoethyl ether and 45 g of butyl acetate, and stir for 30 minutes. Add it into a four-necked flask, heat it to 140°C±2°C and keep it heated at a constant temperature. Weigh 380g of 2-hydroxyethyl methacrylate (HEMA for short), 30g of methyl methacrylate (MMA for short), 10g of methacrylic acid (MA for short), 20g of styrene, and dibenzoyl peroxide (75 for short). %BPO) 50g, stirred for 2 hours. Then put it into a pear-shaped separating funnel and insert it into a four-necked flask. It was added dropwise to the flask over about 4 hours and allowed to react. Naturally cool to room temperature after stopping heating.

[0046] 2. Manufacture process of colored soft hydrophilic contact lenses by coating dyeing process

[0047]The process of manufacturing single-color soft hydrophilic contact lens with two-color machine

[0048] Adjust the two-color ...

Embodiment 2

[0052] 1. Manufacture of coating materials for colored soft hydrophilic contact lenses.

[0053] Weigh 480 g of ethylene glycol monoethyl ether and 45 g of butyl acetate, and stir for 30 minutes. Add it into a four-necked flask, heat it to 140°C±2°C and keep it heated at a constant temperature. Weigh 350g of 2-hydroxyethyl methacrylate (HEMA for short), 30g of methyl methacrylate (MMA for short), 10g of methacrylic acid (MA for short), 20g of styrene, and dibenzoyl peroxide (75 for short). %BPO) 40g, stirred for 2 hours. Then put it into a pear-shaped separating funnel and insert it into a four-necked flask. It was added dropwise to the flask over about 4 hours and allowed to react. Naturally cool to room temperature after stopping heating.

[0054] 2. Manufacture process of colored soft hydrophilic contact lenses by coating dyeing process

[0055] The process of manufacturing single-color soft hydrophilic contact lens with two-color machine

[0056] Adjust the two-color...

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Abstract

The invention relates to a colored soft hydrophilic contact lens and its making method. An organic film and a pigment layer are formed after the heating dye fixation stage through utilizing a film covering, printing and dyeing manner, so the organic film well blocks up the contact of the pigment layer and eyes. A mixture of the organic film, the pigment layer and a lens material monomer is molded, cured and turned to finally obtain the colored soft hydrophilic contact lens, so problems comprising pigment layer fading, weak wearing comfort level and the like are solved.

Description

technical field [0001] The invention belongs to the field of medical devices, and relates to a colored soft hydrophilic contact lens and a preparation method thereof. Background technique [0002] Hydrophilic soft contact lens, commonly known as contact lens, is a new type of contact lens that appeared in the 1960s. It absorbs water and swells after being wet, is soft and elastic, and is breathable and water-permeable. It is suitable for patients with refractive errors. After use, it has a larger field of view and feels comfortable. ,very popular. With the development and demand of science and technology, colored contact lenses came out. Colored soft hydrophilic contact lenses were the first to appear in South Korea. They were mainly colored contact lenses used by celebrities on the stage. Because they have a variety of colors and can look bright at the same time, they were very popular among folk beauty-loving ladies. Popular in Korea, Japan, China and Europe and the Unit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02C7/04C08F220/28C08F220/14C08F220/06C08F212/08C08F222/20C08F226/10
Inventor 康正国
Owner JILIN REALCON CONTACT LENS CO LTD
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