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Plastic lens

A plastic lens, resin technology, applied in thin material processing, glasses/goggles, epoxy resin coatings, etc., can solve the problems of mechanical properties reduction, discoloration, increase, etc., to achieve high surface hardness, excellent cost performance, and interference fringes. produce a suppressive effect

Inactive Publication Date: 2020-05-01
DAICEL CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such high-refractive-index inorganic oxide particles are expensive, so the cost increases, and the hard coat compounded with inorganic oxide particles may be discolored to blue or yellow when exposed to ultraviolet rays, or mechanical properties such as flexibility may be reduced. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0316] Preparation Example 1: Preparation of Hard Coating Solution 1 and Evaluation of Surface Hardness and Scratch Resistance of Hard Coating Film

[0317] Drop into 2-(3,4-epoxycyclohexyl) ethyltrimethoxysilane 277.2 millimoles in 1000 milliliters flasks (reaction vessel) that thermometer, stirring device, reflux condenser and nitrogen inlet tube are installed under nitrogen flow ( 68.30 g), 3.0 mmol (0.56 g) of phenyltrimethoxysilane, and 275.4 g of acetone, and the temperature was raised to 50°C. To the thus obtained mixture was added dropwise 7.74 g (2.8 mmol as potassium carbonate) of a 5% potassium carbonate aqueous solution over 5 minutes, and then 2800.0 mmol (50.40 g) of water was added dropwise over 20 minutes. It should be noted that no significant temperature rise occurred during the dropwise addition. Then, polycondensation reaction was carried out for 5 hours under a nitrogen stream while maintaining 50°C.

[0318] Then, 137.70 g of methyl isobutyl ketone and...

preparation example 2

[0341] Preparation Example 2: Preparation of Hard Coating Solution 3 and Evaluation of Surface Hardness and Scratch Resistance of Hard Coating Film

[0342] Using 75 g of a colorless and transparent liquid product (low molecular weight polyorganosilsesquioxane containing alicyclic epoxy group) containing 25% by weight of methyl isobutyl ketone produced in Preparation Example 1, in order to increase the molecular weight Perform the following operations.

[0343] In a 1000 ml flask (reaction vessel) equipped with a thermometer, a stirring device, a reflux condenser, and a nitrogen gas introduction tube, the low molecular weight polyorganosilsesquisil containing alicyclic epoxy group obtained in Preparation Example 1 was charged under nitrogen flow. Oxane mixture (75g), with respect to the net content (56.2g) of the low molecular weight polyorganosilsesquioxane containing alicyclic epoxy group, add potassium hydroxide 100ppm (5.6mg), water 2000ppm (112mg), After heating at 80°...

Embodiment 1

[0353] Example 1: Manufacture of hard-coated lens 1 and evaluation of interference fringes

[0354] (Preparation of Hard Coating Solution 4)

[0355] Into a 500cc brown sample bottle, 54.7 g of low molecular weight polyorganosilsesquioxane containing alicyclic epoxy groups obtained by the same method as Preparation Example 1 [41 g as a substance containing 25% by weight of MIBK], Product name "SAN-AID SI-100" (manufactured by Sanshin Chemical Industry Co., Ltd., thermal cationic polymerization initiator) 1.0 g, product name "SurflonS-243" (manufactured by AGC SEIMI CHEMICAL, fluorine-based leveling agent) 0.25 g , and 150 g of ethyl acetate were stirred and mixed with a vibrator to prepare a curable composition (hard coating liquid 4).

[0356] (Creation of hard-coated lens 1)

[0357] A lens mold was installed in an injection molding machine (Tuparl TR150S manufactured by Sodic Plastech Co., Ltd.), and a transparent nylon resin (TROGAMID CX7323 manufactured by Daicel-Evon...

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Abstract

The purpose of the present invention is to provide a plastic lens which has a hard coat layer exhibiting high surface hardness and scratch resistance and in which the generation of interference bandsis suppressed. The plastic lens has a plastic lens substrate and a hard coat layer formed on at least one surface of the plastic lens substrate, and the plastic lens substrate includes at least one resin selected from the group consisting of polyamide resins, polycarbonate resins, acrylic resins, allyl resins, urethane resins and thiourethane resins. The hard coat layer is a cured product of a curable composition including the polyorganosilsesquioxane described below, and the polyorganosilsesquioxane content in relation to the total solids content (100% by mass) of the curable composition is 80% by mass or higher. The polyorganosilsesquioxane has structural units indicated by formula (1), the molar ratio of the structural units indicated by formula (I) and the structural units indicated byformula (II) is 5-500, the proportion of the structural units indicated by formula (1) and the structural units indicated by formula (4) in relation to the total siloxane structural unit content is 55-100 mol%, and the number-average molecular weight of the polyorganosilsesquioxane is 1000-50000, and the degree of dispersion of the molecular weight is 1.0-4.0.

Description

technical field [0001] The present invention relates to plastic lenses used in spectacles, sunglasses and the like. More specifically, it relates to a plastic lens having a plastic lens base and a hard coat layer formed on the surface of the plastic lens base. This application claims the priority of Japanese Patent Application No. 2017-175238 for which it applied in Japan on September 12, 2017, and uses the content for this specification. Background technique [0002] Generally, a hard coat layer for imparting high surface hardness and scratch resistance is formed on the surface of plastic lenses used in eyeglasses, sunglasses, and the like. As such a hard coat layer, a silicone-based hard coat agent in which a polycondensate of methyltriethoxysilane or the like is blended has been conventionally used (for example, Patent Document 1). However, the refractive index of the current hard coat layer formed by a silicone-based hard coat agent is as low as about 1.4. In some cas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/14C08G77/14C09D4/00C09D183/04G02C7/10G02C7/12
CPCC08G77/14G02B1/14G02C7/10G02C7/12C09J133/00G02B1/041G02C7/02G02C2202/16C09D163/00C09D183/06C08G77/20C08L77/00C09D183/04C09D4/00G02B1/08B32B2307/40B32B2307/412B32B2307/50Y10T428/31Y10T428/31504Y10T428/31663Y10T428/31725
Inventor 芝本明弘吉村隆史
Owner DAICEL CHEM IND LTD
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