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Optical article and process for producing optical article

A manufacturing method and article technology, which is applied in the field of optical articles, can solve problems such as coating peeling, and achieve the effects of excellent adhesion, increased degrees of freedom, and increased refractive index

Active Publication Date: 2009-08-05
HOYA LENS MFG PHILIPPINES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titanium dioxide has the property of acting as a photocatalyst when exposed to ultraviolet rays, and when it is used as a filler in the hard coat layer, the binder component composed of organic resin around titanium dioxide is often decomposed, causing the coating to peel off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] (1) Plastic lens substrate

[0121] As a plastic lens base material for eyeglasses, Seiko Prestige (manufactured by Seiko Epson, refractive index: 1.74) was used.

[0122] (2) Preparation of primer composition

[0123] Drop into 2900 mass parts methyl alcohol, 50 mass parts 0.1 equivalent sodium hydroxide aqueous solution in stainless steel container, after fully stirring, add 1500 mass parts with titanium dioxide, tin oxide, silicon dioxide as the main composite particle sol (rutile crystal structure, Dispersed in methanol, the surface treatment agent is γ-glycidoxypropyltrimethoxysilane, the total solid content concentration is 20% by mass, manufactured by Catalyst Chemicals Industry Co., Ltd., trade name Optolake), stirring and mixing. Then add 580 parts by mass of polyurethane resin (water dispersion, total solid content concentration is 35% by mass, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., trade name Superflex 210), 35 parts by mass of γ-glycidoxypr...

Embodiment 2

[0132] In preparation of the hard-coat composition of Example 1, the plastic lens which formed the primer layer, the hard-coat layer, and the antireflection layer was obtained similarly to Example 1 except having changed as follows.

[0133] (Preparation of dura mater composition)

[0134] Put 1,000 parts by mass of butyl cellosolve and 2,500 parts by mass of methanol into a stainless steel container, add 1,200 parts by mass of γ-glycidoxypropyltrimethoxysilane, stir well, and then add 300 parts by mass of 0.1 mol / liter hydrochloric acid aqueous solution , and continued to stir for a day and night to obtain silane hydrolyzate. Add 30 parts by mass of a silicone-based surfactant (manufactured by Toray Dow Corning Co., Ltd., trade name L-7001) to this silane hydrolyzate, and after stirring for 1 hour, add 5000 parts by mass of tin oxide, zirconia, and silicon dioxide. The main particle sol (methanol dispersion, total solid content concentration: 30% by mass, manufactured by Nis...

Embodiment 3

[0136] (1) Fabrication of plastic lens substrate

[0137] Under a nitrogen atmosphere, 90 parts by mass of bis(β-epithiopropyl) disulfide and 10 parts by mass of sulfur were mixed and stirred at 100° C. for 1 hour. After cooling, 0.05 parts by mass of tetrabutylammonium bromide was mixed as a catalyst to obtain a homogeneous liquid. Then, it was filtered through a 0.5 μm PTFE filter, poured into a 1.2 mm thick glass mold for lens molding, heated in an oven from 10°C to 120°C over 22 hours, polymerized and solidified, and a lens substrate was produced. The obtained lens substrate had a refractive index of 1.76 and an Abbe number of 33, was transparent, and had a good surface condition.

[0138] (2) Preparation of primer composition

[0139] Drop into 6268 mass parts methyl alcohol, 100 mass parts 0.1 equivalent sodium hydroxide aqueous solution in the stainless steel container, after fully stirring, add 2700 mass parts with titanium dioxide, tin oxide, silicon dioxide as the ...

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Abstract

The invention provides an optical article which includes a plastic substrate, a primer layer, a hard coat layer and an antireflecting layer, causes almost no interference fringe, and is excellent in light resistance and marresistance, and a process for producing an optical article. According to the invention, an optical article includes a plastic substrate and, formed on a surface thereof, a primer layer and a hard coat layer. The primer layer is formed from a coating composition containing the following components (A) to (C): (A) a polyurethane resin; (B) metal oxide fine particles; and (C) an organosilicon compound, and the hard coat layer is formed from a coating composition containing the following component (D): (D) metal oxide fine particles which do not contain titanium oxide.

Description

technical field [0001] The present invention relates to an optical article used as a plastic lens for spectacles, a camera, etc., and a method for producing the optical article. Background technique [0002] Compared with glass lenses, plastic lenses are light in weight, excellent in formability, processability, dyeability, etc., and are not easily broken and have high safety. Therefore, they are rapidly popularized in the field of spectacle lenses and occupy a large market in the field of spectacle lenses. part. In addition, in recent years, in order to meet further demands for thinning and weight reduction, high-refractive-index materials such as thiourethane-based resins and episulfide-based resins have been developed. For example, there is a proposal to produce an episulfide-based resin with a very high refractive index by polymerizing a compound having an episulfide group (episulfide compound) in the presence of sulfur (see Patent Documents 1 and 2). Such an episulfid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04G02B1/10G02B3/00B32B7/00B32B7/02B32B27/18B82Y20/00B82Y30/00C08J7/043C08J7/046G02B1/115G02B1/14G02C7/00
CPCB29D11/00865G02B1/105G02B1/115C08J7/045Y10T428/24975Y10T428/31533Y10T428/31515Y10T428/31598Y10T428/31609C08J7/0423G02B1/18G02B1/14C08J7/043C08J7/046
Inventor 内藤修二杉原洋亮
Owner HOYA LENS MFG PHILIPPINES INC
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