Eyeglass lens

• US 10,852,454 B2
• Filed: 05/30/2017
• Issued: 12/01/2020
• Est. Priority Date: 06/02/2016
• Status: Active Grant

• Current Assignee: Essilor International SA
• Original Assignee: Essilor International SA
• Inventors: Wakiyasu, Hideyuki
• Primary Examiner(s): Greece, James R
• Application Number:
  US16/306,854
• Publication Number:
  US 20190154878A1
• Time in Patent Office: 1,281 Days
• Field of Search: 35115965
• CPC Class Codes: C08G 18/08 Processes
• CPC Class Codes: C08G 18/242 organometallic compounds containing tin-carbon bonds
• CPC Class Codes: C08G 18/38 having heteroatoms other than oxygen C08G18/32 takes precedence
• CPC Class Codes: C08G 18/3876 containing mercapto groups
• CPC Class Codes: C08G 18/76 aromatic
• CPC Class Codes: C08G 18/7642 containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring
• CPC Class Codes: C08K 2201/014 Additives containing two or more different additives of the same subgroup in C08K
• CPC Class Codes: C08K 5/005 Stabilisers against oxidation, heat, light, ozone
• CPC Class Codes: C08K 5/3447 condensed with carbocyclic rings
• CPC Class Codes: C08K 5/3475 condensed with carbocyclic rings
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C08L 81/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing sulfur with or without nitrogen, oxygen or carbon only; Compositions of polysulfones; Compositions of derivatives of such polymers
• CPC Class Codes: G02B 1/041 Lenses
• CPC Class Codes: G02B 5/208 for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: G02C 7/02 Lenses; Lens systems ; Methods of designing lenses
• CPC Class Codes: G02C 7/10 Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses

Abstract

The present invention addresses the problem of providing an eyeglass lens that has excellent UV absorption properties and low yellowness. This eyeglass lens is produced using a resin composition that contains m-xylylene diisocyanate, a polythiol compound, and a UV absorber. The UV absorber contains at least a compound represented by formula (1) and a compound represented by formula (2). The M value represented by formula (X) is greater than 1.40 but less than 3.20.

Claims

1. An eyeglass lens prepared using a resin composition containing m-xylylene diisocyanate, a polythiol compound, and an ultraviolet absorber, wherein the ultraviolet absorber contains at least a compound represented by formula (1) and a compound represented by formula (2) and the M value represented by formula (X) is greater than 1.40 but less than 3.20:

2. The eyeglass lens as claimed in claim 1, wherein the amount of ultraviolet absorber having a molecular weight of 360 or less is less than 0.7 parts by weight when the total of the m-xylylene diisocyanate and the polythiol compound is 100 parts by weight.

3. The eyeglass lens as claimed in claim 1, wherein the sum of W₁ and W₂ is 0.1 parts by weight or more.

4. The eyeglass lens as claimed in claim 1, wherein the molecular weight of a compound represented by formula (1) is 360 or less.

5. The eyeglass lens as claimed in claim 1, wherein the molecular weight of a compound represented by formula (2) is greater than 360.

6. The eyeglass lens as claimed in claim 1, wherein a compound represented by formula (2) is represented by the following formula (4):