Supercharge Your Innovation With Domain-Expert AI Agents!

Plastic lens

A technology of plastic lenses and compounds, used in glasses/goggles, instruments, optics, etc., to achieve excellent weather resistance

Active Publication Date: 2014-06-11
HOYA CORP
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of benzophenone derivatives and phenols in Patent Documents 1 and 2 is for the initial optical properties of the plastic lens and the prevention of optical deformation, etc., and there is no reference to the improvement of the weather resistance of the plastic lens.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Plastic lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5 and comparative example 1～5

[0066] (1) Appearance evaluation (transparency) of the composition before polymerization

[0067] The compositions described in Examples and Comparative Examples were prepared, 50 ml of monomers before polymerization were put into a colorimetric tube (for 50 ml), and the transparency was evaluated under fluorescence in a dark room. The evaluation of each component in the composition is compatible and transparent is "A", and when the composition is cloudy or insoluble components such as (C) and / or (D) components are present, it is evaluated as "B" ".

[0068] (2) Appearance (transparency) of plastic lens

[0069] The appearance of the plastic lenses produced by the methods described in Examples and Comparative Examples was visually observed, and the evaluation was "A" when no turbidity occurred, and "B" when turbidity occurred.

[0070] (3) Evaluation of weather resistance of plastic lenses

[0071] For the D-000 plastic lens (ct2.0mm) that is made by the method described in...

Embodiment 1

[0075] 39.88 g of (A1) 4,4'-diphenylmethane diisocyanate (MDI) which is (A) a polyisocyanate compound having an aromatic ring and 39.88 g of a polyisocyanate compound which does not have an aromatic ring were placed in a 300 ml eggplant-shaped flask. (A2) 11.49 g of 1,6-hexamethylene diisocyanate (HDI), 1.50 g of (C1) 2-hydroxy-4-octyloxybenzophenone as (C) benzophenone compound, and (D) phenolic (D1) 1.50 g of 2,6-di-tert-butyl-p-cresol, butoxy ethyl acid phosphate (trade name "JP-506H", Johoku Chemical Co., Ltd. ) 0.10 g, 0.10 g of dimethyl tin dichloride as a polymerization catalyst, and stirring was continued for 10 minutes under nitrogen purging at 50°C. When they were completely dissolved, 31.40 g of (B1) 2,5-dimercaptomethyl-1,4-dithiacyclohexane (DMMD) and (B2) pentaerythritol tetra( 2-Mercaptoacetate) (PETMA) 17.23 g was stirred under reduced pressure at 0.13 kPa (1.0 Torr) for 20 minutes to prepare Composition 1.

[0076] The composition 1 was poured into a lens mo...

Embodiment 2

[0078] A plastic lens was produced in the same manner as in Example 1 except that the added amount of (C1) 2-hydroxy-4-octyloxybenzophenone was 2.50 g. The evaluation results are shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Provided is a plastic lens having excellent weather resistance, obtained by polymerizing a composition containing a polythiol compound and a polyisocyanate compound having an aromatic ring. The plastic lens is obtained by polymerizing a composition containing (C) 0.5 to 5.0 parts by mass of a benzophenone compound having a hydroxyl group in at least the ortho position, and (D) 0.5 to 5.0 parts by mass of a phenol with respect to a total of 100 parts by mass of (A) a polyisocyanate compound containing a polyisocyanate compound having an aromatic ring, and (B) a polythiol compound.

Description

technical field [0001] The present invention relates to plastic lenses. More specifically, it relates to a plastic lens having excellent weather resistance, which is formed by polymerizing a composition comprising a polyisocyanate compound having an aromatic ring and a polythiol compound. Background technique [0002] As a plastic lens having a high refractive index, a plastic lens made of a resin obtained by polyaddition of a polyisocyanate compound and a polythiol compound is known. For example, when the above-mentioned plastic lens is used as an eyeglass lens, the thickness of the lens can be reduced by using a resin having a high refractive index, which can be expected to give a good impression to the wearer. In addition, as the coloring of the resin, it is required to have excellent weather resistance with little initial coloring and aging changes. [0003] However, plastic lenses formed using polyisocyanate compounds having aromatic rings have a problem of lack of we...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04C08G18/30C08K5/13C08L75/04G02C7/00
CPCG02B1/041C08G18/2825C08G18/3876C08G18/2815C08G18/724C08K5/13C08K5/132C08L75/04C08L81/02
Inventor 伊藤伸介上坂昌久
Owner HOYA CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com