Composite hydrogel contact lens material preparation method

Abstract

The present invention discloses a composite hydrogel contact lens material preparation method, and relates to the technical field of glass production. The composite hydrogel contact lens material preparation method comprises four processes such as raw material mixing, heating reaction, impurity removal and drying. According to the present invention, in the process method, NVP particles having water absorbency of 7-8 are uniformly dispersed in a HEMA matrix phase having water absorbency of 1.6-1.7 by using a solution polymerization method to make the two materials form the composite structure hydrogel cornea contact lens material having the phase interface layer, and during the preparation process, the reaction temperature and the reaction time are controlled to make the two material be subjected to the complete reaction; and the lens material prepared through the preparation method has characteristics of high transparency, good mechanical property, low expansivity, high health value, and high medicinal value.

Description

technical field [0001] The invention relates to the technical field of eyeglass production, in particular to a preparation method of a composite hydrogel contact lens material. Background technique [0002] Contact lenses, commonly known as "contact lenses", are made of colorless or dyed transparent materials based on the shape of the human cornea. When used, they are directly attached to the surface of the tear layer of the cornea and are physiologically compatible with the human eye. To achieve the purpose of vision correction, beauty treatment or treatment, the manufacturing materials of corneal contact lenses include hard air-tight materials, hard air-permeable materials, soft non-hydrophilic materials (also known as elastic materials) and soft hydrophilic materials , because the corneal contact lens made of hydrogel material has a short adaptation period and a strong sense of comfort, and the fitting technology is simpler than that of gas-permeable rigid lens. The hydro...

AI Technical Summary

Problems solved by technology

[0002] Contact lenses, commonly known as "contact lenses", are made of colorless or dyed transparent materials based on the shape of the human cornea. When used, they are directly attached to the surface of the tear layer of the cornea and are physiologically compatible with the human eye. To achieve the purpose of vision correction, beauty treatment or treatment, the manufacturing materials of corneal contact lenses include hard air-tight materials, hard air-permeable materials, soft non-hydrophilic materials (also known as elastic materials) and soft hydrophilic materials , because the corneal contact lens made of hydrogel material has a short adaptation period and a strong sense of comfort, and the fitting technology is simpler than that of gas-permeable rigid lens. The hydrogel material is combined with ophthalmic drugs to manufacture a slow-release drug. Functional contact lenses have always been one of the goals that researchers are striving for, but the contact lens materials currently produced often only have the effect of simply correcting vision, and cannot help people's eyes relieve fatigue, and their health care and medicinal value are low. And the light transmittance and the mechanical properties of the lens are not very good