Transparent plastic substrate and plastic lens

Patent metadata

Field	Value
Publication number	US-2018362731-A1
Application number	US-201816113673-A
Country	US
Kind code	A1
Filing date	Aug 27, 2018
Priority date	Sep 30, 2013
Publication date	Dec 20, 2018
Grant date	—

Abstract

To provide a transparent plastic substrate having a high cut rate of blue light, a plastic lens and a transparent plastic member. A transparent plastic substrate containing a benzotriazole compound represented by the formula (1), a plastic lens containing the transparent plastic substrate, and a transparent plastic member containing a benzotriazole compound represented by the formula (1).

First claim

1 . A plastic lens consisting essentially of:
a transparent plastic substrate comprising:
a resin component comprising a (thio) urethane resin obtained by reaction of bis(isocyanatomethyl)bicyclo[2.2.1]heptane, pentaerythritoltetrakis(3-mercaptopropionate), and 1,2-bis(2-mercaptoethylthio)-3-mercaptopropane;
a benzotriazole compound of formula (1-1) in an amount of 0.10-2.00 parts by mass per 100 parts by mass of the resin component:

wherein R 1 represents an alkyl group having from 1 to 3 carbon atoms or an alkoxy group having from 1 to 3 carbon atoms;
m represents an integer of 0 or 1; and
R 2 represents an alkyl group having from 1 to 12 carbon atoms or an alkoxy group having from 1 to 12 carbon atoms, provided that in the case where m is 1, R 1 and R 2 may be the same as or different from each other; and

at least one a functional layer selected from a group consisting of a cured film, a primer layer, an antireflection film and a water repellent film,
wherein the cured film is formed by a coating liquid comprising an organosilicon compound and one or more fine particles being selected from the group consisting of tin oxide, silicon oxide, zirconium oxide and titanium oxide.

2 . The plastic lens according to claim 1 , wherein the benzotriazole compound is at least one selected from 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chloro-2H-benzotriazole, 2-(3-tert-butyl-2-hydroxy-5-ethylphenyl)-5-chloro-2H-benzotriazole, 2-(4-ethoxy-2-hydroxyphenyl)-5-chloro-2H-benzotriazole and 2-(4-butoxy-2-hydroxyphenyl)-5-chloro-2H-benzotriazole.

3 . The plastic lens according to claim 1 , wherein the benzotriazole compound is at least one selected from 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chloro-2H-benzotriazole and 2-(3-tert-butyl-2-hydroxy-5-ethylphenyl)-5-chloro-2H-benzotriazole.

4 . The plastic lens according to claim 1 , wherein the transparent plastic substrate has a cut rate of light in a wavelength range of from 380 to 500 nm of 35% or more.

5 . The plastic lens according to claim 1 , wherein the transparent plastic substrate has a cut rate of light having a wavelength of 410 nm of 50% or more.

Assignees

• Hoya Lens Thailand Ltd

Inventors

• Kousaka Masahisa
• Tasaki Natsumi

Classifications

• C08L81/04

  Polysulfides · CPC title

• G02B1/041

  Lenses · CPC title

• C08K5/3475 Primary

  condensed with carbocyclic rings · CPC title

• G02B5/223

  containing organic substances, e.g. dyes, inks or pigments · CPC title

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title