Eyeglass lens

• US 10,788,605 B2
• Filed: 05/30/2017
• Issued: 09/29/2020
• 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:
  US16/306,845
• Publication Number:
  US 20190137657A1
• Time in Patent Office: 1,218 Days
• Field of Search: 35115965
• CPC Class Codes: C08G 18/08 Processes
• CPC Class Codes: C08G 18/38 having heteroatoms other than oxygen C08G18/32 takes precedence
• CPC Class Codes: C08G 18/3863 containing groups having sulfur atoms between two carbon atoms, the sulfur atoms being directly linked to carbon atoms or other sulfur atoms
• CPC Class Codes: C08G 18/3865 containing groups having one sulfur atom between two carbon atoms
• CPC Class Codes: C08G 18/3876 containing mercapto groups
• CPC Class Codes: C08G 18/75 cycloaliphatic
• CPC Class Codes: C08G 18/758 containing two or more cycloaliphatic rings
• 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 5/3472 Five-membered rings
• CPC Class Codes: C08K 5/3475 condensed with carbocyclic rings
• CPC Class Codes: C08L 75/04 Polyurethanes
• 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 at least one isocyanate compound selected from the group consisting of 2,5-bis(isocyanatomethyl)bicyclo[2.2.1]heptane and 2,6-bis(isocyanatomethyl)bicyclo[2.2.1]heptane; a polythiol compound; a UV absorber represented by formula (1); and a UV absorber represented by formula (2). The M value represented by formula (X) is greater than 0.7 but less than 16.7.

Claims

1. An eyeglass lens prepared using a resin composition comprising at least one isocyanate compound selected from a group consisting of 2,5-bis(isocyanatomethyl)bicyclo[2.2.1]heptane and 2,6-bis(isocyanatomethyl)bicyclo[2.2.1]heptane, a polythiol compound, an ultraviolet absorber represented by formula (1), and an ultraviolet absorber represented by formula (2), wherein the eyeglass lens has an M value represented by the following formula (X) greater than 0.7 and less than 16.7:

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

3. The eyeglass lens as claimed in claim 1, wherein the M value is greater than 0.7 and less than 10.1.

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

5. The eyeglass lens according to claim 1, wherein the sum of W₁ and W₂ is 3.0 parts by weight or more.