Optical Article Comprising an Acrylic Substrate Coated with a Specific Hard-Coat

Patent metadata

Field	Value
Publication number	US-2016124122-A1
Application number	US-201314889612-A
Country	US
Kind code	A1
Filing date	May 7, 2013
Priority date	May 7, 2013
Publication date	May 5, 2016
Grant date	—

Abstract

This invention is related to an optical article, such as an ophthalmic lens, comprising a an acrylic substrate (1) coated with a specific hard-coat (2) formed from a composition comprising a hydrolyzed alkoxysilane, a colloidal metal oxide and a poly-glyceryl ether.

First claim

1 . An ophthalmic lens comprising:
(a) an acrylic substrate; (b) an anti-abrasion coating applied onto at least one surface of said substrate and obtained by curing a composition comprising the following constituents:
(a) a monomer compound of hydrolyzed alkoxysilane representing from 10 to 95 dry wt % of the dry weight of the composition;
(b) at least one colloidal metal oxide compound selected from titanium, zirconium, cerium, niobium, tantalum, and/or tin; and
(c) a polyglycidyl ether representing from 1 to 65 dry wt % of the dry weight of the composition;
with the proviso that the total amount of these constituents does not exceed 100 dry wt % of the dry weight of the composition.

2 . The ophthalmic lens according to claim 1 , wherein said coating composition further includes (d) a metal alkoxide.

3 . The ophthalmic lens according to claim 1 , wherein the polyglycidyl ether comprises a trimethylopropane triglycidyl ether (TMPTGE).

4 . The ophthalmic lens according to claim 1 , which has an abrasion resistance index above 3.

5 . The ophthalmic lens according to claim 1 , wherein the anti-abrasion coating has a refractive index of at least 1.55.

6 . The ophthalmic lens according to claim 1 , which further includes at least one functional coating placed on the anti-abrasion coating, said functional coating being selected from the group consisting of anti-reflective coating, anti-UV coating, polarizing coating, color filtration coating, photochromic coating, antistatic coating, tinted coating, anti-fog coating and anti-smudge coating.

7 . A method for manufacturing an ophthalmic lens, comprising:
providing an acrylic substrate; applying an anti-abrasion coating composition onto at least one surface of said substrate, said coating composition comprising the following constituents:
(a) a monomer compound of hydrolyzed alkoxysilane representing from 10 to 95 dry wt % of the dry weight of the composition;
(b) at least one colloidal metal oxide compound selected from titanium, zirconium, cerium, niobium, tantalum, and/or tin; and
(c) a polyglycidyl ether representing from 1 to 65 dry wt % of the dry weight of the composition;
with the proviso that the total amount of these constituents does not exceed 100 dry wt % of the dry weight of the composition; and
curing the coating at a temperature ranging from 120° C. to 135° C.

8 . The method according to claim 7 , further comprising a pre-curing step at 70 to 85° C. for a period of time of between 5 and 20 minutes.

9 . The method according to claim 7 , wherein said coating composition is applied directly onto said substrate, without first subjecting said substrate to any physical pre-treatment suitable for activating its surface.

10 . The method according to claim 7 , wherein the coating is cured at 120° C. for a period of time of between 2 and 3 hours.

Assignees

• Essilor Int

Inventors

• Duc Olivier
• Yu Hui
• Qi Yangiong
• Yong Kian Soon

Classifications

• G02B1/14 Primary

  Protective coatings, e.g. hard coatings · CPC title

• C08K2003/2213

  of cerium · CPC title

• C08K2003/2231

  of tin · CPC title

• C08K5/1515

  Three-membered rings · CPC title

• G02C2202/16

  Laminated or compound lenses · CPC title