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Coating composition and optical article

A technology for coating composition and articles, which is applied in the field of optical articles, can solve the problems of discoloration of hard coatings, and achieve the effects of preventing discoloration, excellent adhesion, and high industrial use value

Inactive Publication Date: 2012-04-18
TOKUYAMA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The idea of ​​solving the problem of preventing discoloration of hard coats from this point of view does not yet exist

Method used

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  • Coating composition and optical article
  • Coating composition and optical article
  • Coating composition and optical article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0178] Using an ultrasonic cleaner, the lens 1 (thiourethane-based resin plastic lens) having a thickness of 2 mm as a plastic lens substrate was subjected to alkali etching in a 20% by weight aqueous sodium hydroxide solution at 60° C. for 10 minutes. Then, wash with distilled water and warm water at 50°C to remove residual alkali, and then dry at room temperature for 10 minutes. At 20° C., the aforementioned coating composition (1) was dip-coated on the alkali-etched lens substrate at a pulling speed of 20 cm / min. After precuring in an oven at 70° C. for 10 minutes, curing was carried out at 110° C. for 2 hours to obtain a hard coat lens (optical article) having a hard coat layer with a refractive index of 1.69 and a film thickness of 2.8 μm on both surfaces.

[0179] About the said hard-coat lens, evaluation was performed about each evaluation item shown in following (1)-(5).

[0180] As a result, the hard-coated lens exhibited appearance: ◯, steel wool scratch resistance:...

Embodiment 2～14

[0202] Except for using the plastic lens substrates and coating compositions shown in Table 2, hard-coated lenses (optical articles) having a hard-coat layer were produced and evaluated in the same manner as in Example 1. The evaluation results are shown in Table 3.

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Abstract

Disclosed is a coating composition appropriately usable for forming a hard coat film that is obtained by applying the composition onto a light-permeable member, such as a plastic lens having a high refractive index or a photochromic plastic lens having a color-developing function and a high refractive index, and hardening. This coating composition exhibits an extremely improved weather resistance (prevention of discoloration) while sustaining a high refractive index, a good scratch resistance and an excellent adhesiveness to an optical base. Specifically disclosed is a coating composition, comprising: titanium oxide-containing metal oxide microparticles (A) together with titanium oxide-containing metal oxide microparticles (B), provided that the titanium oxide-containing metal oxide microparticles (A) and the titanium oxide-containing metal oxide microparticles (B) have been selected through a specific light irradiation test and show different properties; an epoxy group-containing organosilicon compound (C) such as ?-glycidoxypropyltrimethoxysilane; water (D); an organic solvent (E) such as methyl alcohol; and a hardening catalyst (F) such as aluminum acetylacetonate or magnesium perchlorate, each in a specific amount.

Description

technical field [0001] The present invention relates to a device for forming scratch resistance, weather resistance, and durability on the surface of a light-transmitting member such as a high refractive index lens made of plastic, especially a high refractive index photochromic lens. A coating composition for a hard coat layer, and an optical article having the hard coat layer. Background technique [0002] Plastic lenses have features that glass lenses do not have, such as light weight, safety, ease of processing, and fashion, and are becoming the mainstream in the current field of eyeglass lenses. In addition, in recent years, plastic lenses are becoming thinner and have a higher refractive index. [0003] On the other hand, since plastic lenses have the disadvantage of being easily scratched, this disadvantage is being improved by providing a silicone-based hard coat layer on the surface. However, since the refractive index of the plastic lens used as the base material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06B32B27/00C09D7/12G02B1/10G02B5/23G02C7/00G02C7/10C09D7/62G02B1/14
CPCC09D5/028C09D7/1225C08K3/22G02B1/105G02B5/23C08G77/14C08K5/5435C09D5/29C08K3/0016C08K9/06C09D7/62G02B1/14C09D183/06G02B1/10G02C7/00
Inventor 森力宏中司俊一郎
Owner TOKUYAMA CORP
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