Coating composition, eyeglass lens, and method for manufacturing eyeglass

Patent metadata

Field	Value
Publication number	US-11814493-B2
Application number	US-201916583384-A
Country	US
Kind code	B2
Filing date	Sep 26, 2019
Priority date	Mar 29, 2018
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

Provided are [1] a coating composition containing inorganic oxide particles (A), an epoxy compound (b1) having an organosilane moiety, a polyglycerol polyglycidyl ether (b2) having three or more epoxy groups, and a photocationic polymerization initiator (C), [2] a spectacle lens including a hard coat layer obtainable by curing the coating composition described in [1] above and a substrate, and [3] a method for producing a spectacle lens, including a step of applying the coating composition described in [1] above onto a substrate and a step of curing the applied coating composition by irradiation with light.

First claim

The invention claimed is:

1. A spectacle lens comprising:
a hard coat layer obtainable by curing a coating composition comprising:
inorganic oxide particles (A),
a silane coupling agent (b1) having an organosilane moiety and an epoxy group,
a polyglycerol polyglycidyl ether (b2) consisting of polyglycerol polyglycidyl ether having four or more epoxy groups, a content of the polyglycerol polyglycidyl ether (b2) relative to a solids content of the coating composition is in a range of 10 mass % or more and 50 mass % or less, and
a photocationic polymerization initiator (C); and

a substrate.

2. The spectacle lens according to claim 1 , wherein the polyglycerol polyglycidyl ether (b2) has an epoxy equivalent of 150 g/eq or more.

3. The spectacle lens according to claim 1 , wherein the polyglycerol polyglycidyl ether (b2) has a viscosity of 1,000 mPa·s or more and 8,000 mPa·s or less.

4. The spectacle lens according to claim 1 , wherein the inorganic oxide particles (A) are at least one kind selected from silica particles and zirconia particles.

5. The spectacle lens according to claim 1 , wherein the inorganic oxide particles (A) have a light transmittance of 50% or less at a wavelength of 660 nm in an affinity test for a dipentaerythritol acrylate compound.

6. A method for producing a spectacle lens, comprising:
a step of applying a coating composition onto a substrate, the coating composition comprising:
inorganic oxide particles (A),
a silane coupling agent (b1) having an organosilane moiety and an epoxy group,
a polyglycerol polyglycidyl ether (b2) consisting of polyglycerol polyglycidyl ether having four or more epoxy groups, a content of the polyglycerol polyglycidyl ether (b2) relative to a solids content of the coating composition is in a range of 10 mass % or more and 50 mass % or less, and
a photocationic polymerization initiator (C); and

a step of curing the applied coating composition by irradiation with light.

Assignees

• Hoya Lens Thailand Ltd

Inventors

• Ishizaki Takako
• Hamakubo Katsushi
• Tasaki Natsumi

Classifications

• C08J7/043 Primary

  Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50) · CPC title

• C08J7/046

  Forming abrasion-resistant coatings; Forming surface-hardening coatings · CPC title

• C09D163/00

  Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins · CPC title

• C09D171/08

  Polyethers derived from hydroxy compounds or from their metallic derivatives (C09D171/02 takes precedence) · CPC title

• G02B1/12

  by surface treatment, e.g. by irradiation · CPC title