Optical resin monomer and preparation method thereof, optical resin and preparation method thereof

Abstract

The invention provides an optical resin, which is prepared from the following components; the components include: 70-80 parts by weight of an episulfide compound; 20-30 parts by weight of an optical resin monomer; 0.1-1 part by weight of a catalyst; The optical resin monomer is obtained by reacting one or more of the compounds represented by formula (I) to formula (IV) with alkyl isocyanate acrylate. Compared with the prior art, the present invention introduces a compound having both isocyanate functional group and cyano functional group into the optical resin, the free isocyanate can be effectively eliminated along with the ring-opening reaction of polythiol, and the reaction degree of the monomer is improved, thereby improving Improve the toughness and mechanical properties of optical resin.

Description

technical field [0001] The invention belongs to the technical field of optical resin materials, and in particular relates to an optical resin monomer and a preparation method thereof, an optical resin and a preparation method thereof. Background technique [0002] With the development of polythiourethane optical resin materials in recent years, 1.60 and 1.67 refractive index optical lenses have become popular in the domestic market, with the characteristics of high refractive index, high Abbe number, high light transmittance, and high impact toughness Widely acclaimed. However, with the exponential increase in the proportion of myopia among young people and the increasing degree of myopia, the refractive index of 1.60 and 1.67 can no longer meet the application needs of high-degree populations. The main reason is that the polythiourethane optical resin material is polymerized from polythiol and isocyanate. Polythiol generally accounts for about 50%, and the sulfur content b...

AI Technical Summary

Problems solved by technology

The unsolvable problems in the three-component reaction system are: (1) The small molecules of polythiol used have a strong pungent odor, and a small amount of monomer residue can cause the product to have a strong odor after curing. The general solution of the prior art It is a high-temperature treatment for secondary curing; (2) the reactivity of isocyanate is low. Under the production conditions of the existing technology, there are more unreacted monomers of isocyanate, which directly results in a high rate of defective texture of optical products; (3) residual small molecule polymer Mercaptans and isocyanate monomers will directly lead to the decline in the mechanical properties of optical materials and the anti-aging performance of products, and greatly increase the probability of burns during the cleaning and hard coating of optical lenses, resulting in a decrease in yield

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