High refractivity resin lens and preparation method thereof

A resin lens, high refractive index technology, used in optics, instruments, optical components, etc., can solve the problems of low refractive index, unsatisfactory comprehensive performance, limited application scope of materials, etc., to achieve a wide range of applications and improved comprehensive performance. Effect

Inactive Publication Date: 2009-12-30
HANGZHOU XINSHUN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, optical resin materials widely used in the market, such as polymethyl methacrylate (PMMA), CR-39, etc., have a relatively

Method used

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  • High refractivity resin lens and preparation method thereof
  • High refractivity resin lens and preparation method thereof
  • High refractivity resin lens and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The first step of synthesis of thioglycerol (SR1)

[0028] Add 0.05 mol of 1,2,3-trichloropropane, 0.3 mol of thiourea and 0.35 mol of concentrated hydrochloric acid into a 100 mL three-necked flask equipped with electromagnetic stirring, a thermometer, and a reflux condenser, heat and reflux for 24 hours, then cool After reaching room temperature, add 0.4 mol of ammonia water, slowly raise the temperature to 60°C, heat and stir for 5 hours, then stand for stratification, remove the upper aqueous solution, pickle the lower layer, wash with water, and distill to obtain the product SR1;

[0029] Preparation of the second step high refractive index resin lens

[0030] Mix SR1 and isocyanate compound evenly at a molar ratio of 1:1, then add 0.5% of the total mass of the mixture as a phosphate-based internal mold release agent and 0.05% of the total mass of the mixture as an organotin catalyst, and then follow the instructions for synthetic resin lenses. The standard requir...

Embodiment 2

[0034]Synthesis of the first step benzenedimethanol (SR2)

[0035] Add 0.05 mol of benzenedimethanol, 0.15 mol of thiourea and 0.2 mol of concentrated hydrochloric acid into a 100 mL three-necked flask equipped with electromagnetic stirring, a thermometer, and a reflux condenser, heat and reflux for 30 hours, then cool to room temperature, and then add 0.2 mol of ammonia water, slowly warming up to 65°C, heating and stirring for 4 hours, standing for stratification, removing the upper aqueous solution, pickling the lower layer, washing with water, and distilling to obtain the product SR2;

[0036] Preparation of the second step high refractive index resin lens

[0037] Mix SR2 and isocyanate compound uniformly at a molar ratio of 1.2:1, then add 0.5% of the total mass of the mixture as a phosphate-based internal mold release agent and 0.05% of the total mass of an organotin catalyst, first at 50-60°C After vacuum defoaming and prepolymerization for 2 hours, inject it into the...

Embodiment 3

[0042] The first step 2,3-dimercaptopropylthiopropanethiol (SR4)

[0043] Add 0.01mol of mercaptoethanol and 0.015mol of pyridine into a 100mL three-necked flask equipped with electromagnetic stirring, a thermometer, a reflux condenser and a dropping funnel, and then add 0.005mol of epichlorohydrin dropwise at 35°C. Then continue to react for 1 hour, add 0.1 mol of thiourea and 0.15 mol of concentrated hydrochloric acid, heat and reflux and stir for 12 hours, then cool to room temperature, add 0.25 mol of ammonia water, slowly raise the temperature to 60 ° C, heat and stir for 4 hours, and then let stand to separate Layer, after the upper aqueous solution is separated, the lower layer is pickled, washed with water, and the product SR4 is obtained after distillation;

[0044] Preparation of the second step high refractive index resin lens

[0045] Mix SR4 and isocyanate compound evenly at a molar ratio of 0.8:1, then add 0.5% of the total mass of a phosphate-based internal mol...

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Abstract

The invention discloses a high refractivity resin lens and a preparation method thereof; the preparation method comprises the following steps: mixing one or more of sulfur-containing monomers with one or more of polyisocyanates or isothiocyanate compound in a molar ratio of 0.8-1.3:1 evenly, then adding phosphate internal releasing agent accounting for 0.05-2% of the total mass of the above mixture and organo-tin catalyst accounting for 0.005-0.1% of the total mass of the above mixture, then adding light stabilizer, ultraviolet absorbent and antioxidant according to the standards and demands of resin lens synthesis and obtaining the lens by polymerization. The refractivity nD of the lens prepared by the method of the invention can reach 1.6725, the comprehensive performance is increased and the lens can be widely used as the lens of the telescope, the sighting telescope, the magnifier and the camera, thus expanding the application range of the resin lens.

Description

technical field [0001] The invention belongs to the technical field of organic chemical synthesis, and relates to a high refractive index resin lens and a preparation method thereof. Background technique [0002] In addition to inorganic glass, the research and development of using synthetic resin with excellent optical properties as lens materials is constantly developing, and there is a tendency to gradually replace traditional lens materials. Compared with inorganic glass lenses, resin lenses are characterized by light weight, high transparency, large lens size, impact resistance, easy processing and molding, and dyeing. Resin sheets are in a priority position in the eyewear market competition. According to reports, in 1988, optical resin lenses accounted for 65% in the United States and about 55% in Japan. About 85% to 90% of the 32 million people who wear glasses in Japan recently use resin lenses. Synthetic resin optical lenses were first made of polyallyl diglycol ...

Claims

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Application Information

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IPC IPC(8): G02B1/04C08G18/73C08G18/76C08G18/38
Inventor 陈盛雄吕金凤梁学正
Owner HANGZHOU XINSHUN CHEM
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