A kind of preparation method and application of polyurethane optical resin

An optical resin, polyurethane technology, used in optics, optical components, instruments, etc., can solve the problems of related patents that do not pay attention to the quality of isocyanate monomers, impact toughness and glass transition temperature, and anti-yellowing performance. Effects of Optical Distortion Incidence

Active Publication Date: 2022-01-07
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Under normal circumstances, manufacturers often adjust the resin refractive index by adjusting the ratio of monomers. Directly adjusting the ratio of monomers often causes various changes in the performance of resin lenses, which in turn causes more problems, especially impact toughness. The most obvious reduction in glass transition temperature and anti-yellowing performance
[0006] At present, there are no relevant patents in the field of optics that focus on the quality of isocyanate monomers

Method used

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  • A kind of preparation method and application of polyurethane optical resin
  • A kind of preparation method and application of polyurethane optical resin
  • A kind of preparation method and application of polyurethane optical resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add 52 parts by mass of m-xylylene diisocyanate (XDI, purity 99.76%) with a dimer content of 0.21wt% (based on GPC) into a stirred reactor, and add 0.015 parts by mass of diisocyanate at 25°C. As a catalyst, butyltin dichloride was mixed and dissolved with 0.10 parts by mass of acidic phosphoric acid ester (Stepan Co., trade name Zelec UN), and 0.05 parts by mass of an ultraviolet absorber (manufactured by Rianlon, trade name RIASORB UV531). And then, add 48 parts by mass 1,2-bis[(2-mercaptoethyl)thio]-3-mercaptopropane is polythiol compound (Jingbo Chemical Industry, trade name polythiol 501), it is mixed to form Polymeric raw material composition. After cooling to 20°C, it was degassed at 2kPa and 25°C for 1 hour, filtered through a polytetrafluoroethylene membrane filter with a pore size of 0.45 μmm, and poured into a lens mold. It took 24 hours to raise the temperature from 20°C to 120°C in an oven to polymerize and solidify, demould, and then undergo secondary cur...

Embodiment 2

[0043] The isocyanate raw material used is basically the same as that of Example 1, the difference lies in the dimer content therein. This example adopts XDI with a dimer content of 0.98wt%, and the polymerizable raw material composition is the same as that of Example 1 except that Synthesis and manufacturing operations of plastic lenses. The results are shown in Table 1.

Embodiment 3

[0045] The used isocyanate raw material is basically the same as that of Example 1, except that the dimer content is therein. In this example, XDI with a dimer content of 1.52wt% is used, and the same operation as Example 1 is implemented except that. The results are shown in Table 1.

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Abstract

The invention provides a method for preparing polyurethane optical resin and its application. The preparation method comprises the step of polymerizing a raw material composition containing isocyanate and polythiol compound to obtain the polyurethane optical resin. The isocyanate used in the raw material composition is The content of the dimer structure polymer of isocyanate in the isocyanate is controlled to be ≤ 4wt%, preferably ≤ 3wt%, more preferably ≤ 2.5wt%, more preferably ≤ 1.6wt%. The preparation method of the polyurethane optical resin provided by the invention can well manufacture the polyurethane optical resin and can effectively reduce the occurrence rate of optical deformation of the product.

Description

technical field [0001] The present invention relates to a method for producing optical resins having good optical properties by polymerizing isocyanate and polythiol compounds. Background technique [0002] Optical materials are widely used to make optical components such as spectacle lenses, windshields of aircraft and automobiles, window glass, lenses, and prisms. Traditional optical materials are mainly inorganic glass, but there are disadvantages such as high density, poor impact resistance and easy damage to the human body after being broken; while polymer optical materials have low density, light weight, high transparency, impact resistance, and easy molding Processing and other characteristics, the market share of optical resin lenses is increasing year by year, and the popularization of resin lenses is an inevitable trend. [0003] Among the optical resins, polyurethane resin is the most important one, which is obtained by the polymerization reaction of isocyanate a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/79C08G18/32C08G18/38G02B1/04
CPCC08G18/794C08G18/3876G02B1/04C08L75/04C08G18/32C08G18/79C08G18/38C08G18/72C08G18/08
Inventor 李建峰尚永华吴谦朱付林陈浩王鹏王峤华卫琦黎源
Owner WANHUA CHEM GRP CO LTD
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