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Preparation method for improving ultraviolet resistance of contact lenses through ultraviolet absorbent agent

A UV absorber, contact lens technology, applied in glasses/goggles, instruments, optics, etc., can solve the problem of lack of high-efficiency anti-ultraviolet contact lens technology, and achieve the effect of low production cost

Inactive Publication Date: 2019-05-24
华诺森(武汉)生物医药技术有限公司
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

At present, the ultraviolet absorption effect of contact lenses sold in the domestic market belongs to the ANSI CLASS II standard. Its UVA absorption is about 70%, and its UVB absorption is about 95%. There is a lack of high-efficiency anti-ultraviolet contact lens technology and products. Highly effective UV absorber to reduce damage to cornea, retina and lens

Method used

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  • Preparation method for improving ultraviolet resistance of contact lenses through ultraviolet absorbent agent
  • Preparation method for improving ultraviolet resistance of contact lenses through ultraviolet absorbent agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment ( 1

[0032] 98.5% hydroxyethyl methacrylate, 0.2% 2-[3-(2H-benzotriazole-2-methyl)-4 hydroxyphenyl] ethyl methacrylate, 0.5% azobisiso Nitrile, 0.8% ethylene glycol dimethacrylate, stirred evenly, the lens is clear, and the transmittance is detected by an ultraviolet spectrophotometer.

Embodiment ( 2

[0034] 97.7% hydroxyethyl methacrylate, 1.5% 2-[3-(2H-benzotriazole-2-methyl)-4 hydroxyphenyl] ethyl methacrylate, 0.5% azobisiso Nitrile, 0.8% ethylene glycol dimethacrylate, stirred evenly, the lens is clear, and the transmittance is detected by an ultraviolet spectrophotometer.

Embodiment ( 3

[0036] 96.2% hydroxyethyl methacrylate, 2.5% 2-[3-(2H-benzotriazole-2-methyl)-4 hydroxyphenyl] ethyl methacrylate, 0.5% azobisiso Nitrile, 0.8% ethylene glycol dimethacrylate, stirred evenly, the lens is clear, and the transmittance is detected by an ultraviolet spectrophotometer. In the present invention, the value of T% is the average value of the transmittance in this band.

[0037] The test data of each embodiment of table one:

[0038]

[0039] Can find out from example one, two, three contrast, add ultraviolet absorber 2-[3-(2H-benzotriazole-2-methyl)-4 hydroxyphenyl] ethyl methacrylate, can obviously have good The anti-ultraviolet performance meets the anti-ultraviolet standard ANSI CLASS I, that is, it blocks more than 90% of UVA absorption and more than 99% of UVB absorption. This kind of lens enables the wearer to reduce the damage of ultraviolet light to his eyes; at the same time, it has no effect on the optical performance of the lens in the visible light reg...

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Abstract

The invention discloses a preparation method for improving the ultraviolet resistance of contact lenses through an ultraviolet absorbent agent. The preparation method involves, by weight, 90-98.8% ofcontact lens monomer mixed liquid with HEMA as a main base material, 0.2-2.5% of the ultraviolet absorbent agent, 0.3-1.0% of an initiator and 0.7-0.9% of a cross-linking agent. The preparation methodhas the advantages that 1, by using a proper amount of the ultraviolet absorbent agent 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl methacrylate in the contact lens mixed material, so that the contact lenses prepared by using the method are high in ultraviolet resistance; the contact lenses prepared by using the method has high ultraviolet resistance, but has no influence on the lens opticalperformance in the visible region; the preparation method for improving the ultraviolet resistance of the contact lenses is simple in preparation process and low in production cost.

Description

technical field [0001] The invention relates to a preparation method for improving the anti-ultraviolet performance of contact lenses by an ultraviolet absorber. By adding high-efficiency UV absorbers, the UV resistance of contact lenses has been changed. Background technique [0002] A large number of ophthalmology and optometry studies have shown that prolonged exposure to ultraviolet band A (UVA) and band B (UVB) is one of the causes of eye diseases such as cataracts, macular degeneration, and keratitis. Even without direct sunlight, ultraviolet (UV) radiation, which is invisible to the naked eye, still exists and can cause some damage to eye health. The ultraviolet spectrum is divided into three bands: UVA (320-400nm), UVB (280-320nm) and UVC (100-280nm). Each UV band is absorbed differently by eye tissue. UVA, the band closest to the visible spectrum, is preferentially absorbed by the cornea and retina. UVB is mainly absorbed by the lens and partly by the retina. U...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/20C08F222/14C08F2/44C08K5/3475G02C7/04
Inventor 张爱军
Owner 华诺森(武汉)生物医药技术有限公司
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