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A kind of 1.70 refractive index polyurethane resin lens and preparation method thereof

A technology of polyurethane resin and refractive index, applied in the field of 1.70 refractive index polyurethane resin lens and its preparation, can solve the problems of low light transmittance, poor compatibility, complicated preparation process and the like

Active Publication Date: 2021-11-26
江苏新视客光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is that most resins with a refractive index of 1.70 are homopolymers or copolymers prepared by ion ring-opening polymerization of episulfide monomers, but the preparation process of episulfide monomers is complicated, the cost is high, and There is no manufacturer in China, and adding nano-silica can increase the refractive index of the lens, but nano-silica is easy to agglomerate, and has poor compatibility with the resin lens matrix, resulting in poor mechanical strength and low light transmittance of the final lens.

Method used

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  • A kind of 1.70 refractive index polyurethane resin lens and preparation method thereof
  • A kind of 1.70 refractive index polyurethane resin lens and preparation method thereof
  • A kind of 1.70 refractive index polyurethane resin lens and preparation method thereof

Examples

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example 1

[0037] Add β-cyclodextrin and sodium hydroxide solution with a mass fraction of 70% to the beaker at a mass ratio of 1:5, stir at room temperature for 10 minutes, and then add cyclodextrin with 10% cyclodextrin mass to the beaker. Trimethylammonium chloride, put the beaker in a water bath, heat up to 50°C, keep the temperature for 3 hours, filter and separate to obtain the filter residue, and dry to obtain cationic cyclodextrin; the cationic cyclodextrin prepared above and deionized After the water is mixed at a mass ratio of 1:10, stir at a high speed of 700r / min for 10 minutes to obtain a cationic cyclodextrin suspension, and transfer the cationic suspension into a three-necked flask with a dropping funnel and a stirrer; Move the flask into a water bath, heat up to 60°C, start the mixer, and stir at a speed of 200r / min. During the stirring process, add cyclodextrin four times the mass of cyclodextrin dropwise to the three-necked flask through the dropping funnel. Titanium ch...

example 2

[0041] Add β-cyclodextrin and sodium hydroxide solution with a mass fraction of 70% to the beaker at a mass ratio of 1:5, and stir at room temperature for 13 minutes, then add cyclodextrin mass 10% glycidyl Trimethylammonium chloride, put the beaker in a water bath, heat up to 55°C, keep the temperature for 3 hours, filter and separate to obtain the filter residue, and dry to obtain cationic cyclodextrin; the cationic cyclodextrin prepared above and deionized After mixing the water at a mass ratio of 1:10, stir at a high speed of 750r / min for 13 minutes to obtain a cationic cyclodextrin suspension, and transfer the cationic suspension into a three-necked flask with a dropping funnel and a stirrer; Move the flask into a water bath, heat up to 65°C, start the mixer, and stir at a speed of 250r / min. During the stirring process, add cyclodextrin tetrachloride, which is 7 times the mass of cyclodextrin, dropwise to the three-necked flask through the dropping funnel. Titanium chlori...

example 3

[0045] Add β-cyclodextrin and sodium hydroxide solution with a mass fraction of 70% to the beaker at a mass ratio of 1:5, stir at room temperature for 15 minutes, and then add cyclodextrin mass 10% glycidyl Trimethylammonium chloride, put the beaker in a water bath, heat up to 60°C, keep the temperature for 4 hours, filter and separate to obtain the filter residue, and dry to obtain the cationic cyclodextrin; the cationic cyclodextrin prepared above and deionized After the water is mixed at a mass ratio of 1:10, stir at a high speed of 800r / min for 15 minutes to obtain a cationic cyclodextrin suspension, and transfer the cationic suspension into a three-necked flask with a dropping funnel and a stirrer; Move the flask into a water bath, heat up to 70°C, start the mixer, and stir at a speed of 300r / min. During the stirring process, add tetracycline 8 times the mass of cyclodextrin dropwise to the three-necked flask through the dropping funnel. Titanium chloride, the dropping ra...

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Abstract

The invention relates to a 1.70 refractive index polyurethane resin lens and a preparation method thereof, belonging to the technical field of optical lens preparation. In the present invention, the β-cyclodextrin is first alkalized and then added with glycidyl trimethyl ammonium chloride for heating reaction to prepare the cationic cyclodextrin, and then the cationic cyclodextrin is added to the hydrolyzed solution of titanium tetrachloride to prepare the cationic cyclodextrin. The modified nano-titanium dioxide is obtained, and then the modified nano-titanium dioxide is surface-modified with isocyanate to obtain a self-made titanium dioxide additive. Finally, it is mixed with a polythiol compound to obtain a polyurethane monomer. After adding auxiliary materials and catalysts, the 1.70 polyurethane lens is obtained by casting. , The polyurethane resin lens prepared by the invention has high refractive index, high mechanical strength, thin thickness and good light transmittance, and has broad application prospects.

Description

technical field [0001] The invention relates to a polyurethane resin lens with a refractive index of 1.70 and a preparation method thereof, belonging to the technical field of optical lens preparation. Background technique [0002] At present, under the same degree of power, high refractive index resin can greatly reduce the thickness of the lens. Therefore, for myopia patients with high degrees, high refractive index resin lenses have the advantages of beautiful appearance and light weight. A resin with a refractive index of 1.70 is generally classified as a high refractive index resin. Among them, the resin with a refractive index of 1.70 is mostly a homopolymer or a copolymer prepared by ionic ring-opening polymerization of episulfide monomers. However, the preparation process of episulfide monomer is complicated, the cost is high, and there is no domestic manufacturer to produce it, and adding nano-silica can improve the refractive index of the lens, but nano-silica is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/38C08K9/10C08K3/22G02B1/04G02C7/02
CPCC08G18/3876C08K3/22C08K9/10C08K2003/2241C08K2201/011G02B1/041G02C7/022
Inventor 刘建中郭耀钟
Owner 江苏新视客光电科技有限公司
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