PROCESS FOR PRODUCING PHOTOCHROMIC OPTICAL ARTICLES

• US 20150205020A1
• Filed: 03/31/2015
• Published: 07/23/2015
• Est. Priority Date: 06/30/2006
• Status: Abandoned Application

• Current Assignee: Tokuyama Corporation
• Original Assignee: Tokuyama Corporation
• Inventors: OTANI, Toshiaki, NAGOH, Hironobu
• Application Number:
  US14/675,282
• Publication Number:
  US 20150205020A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C08J 2369/00 Characterised by the use of polycarbonates; Derivatives of polycarbonates
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08J 7/043 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 Class Codes: C08J 7/046 Forming abrasion-resistant coatings; Forming surface-hardening coatings
• CPC Class Codes: G02B 5/23 Photochromic filters
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• CPC Class Codes: Y10T 428/31598 Next to silicon-containing [silicone, cement, etc.] layer

Abstract

Provided is a method for producing a photochromic optical article having a photochromic coating layer exhibiting photochromism formed on an optical base such as a plastic lens which has good optical characteristics and photochromic characteristics, and also has good adhesion between the base and the photochromic layer. The method enables to easily produce such a photochromic optical article by improving wettability of a photochromic coating agent for a primer. In this method, the photochromic optical article is produced by forming a primer layer on the optical base surface by coating a primer comprising an emulsion which has a colloidally dispersed urethane resin in a dispersion medium, and then forming on the primer layer.

Claims

1. An optical article comprising a laminate structure consisting of an optical substrate, a photochromic layer formed from a coating solution containing a radical polymerizing monomer, a compound having a silanol group or a group capable of preparing a silanol group by hydrolysis and a photochromic compound and a primer layer therebetween, wherein a surface of the optical substrate and the photochromic layer are bonding through the primer layer, and wherein said radical polymerizing monomer excludes (i) monomers having a silanol group or monomers having a group capable of preparing a silanol group by hydrolysis and (ii) monomers having a maleimide group, said optical article obtained by a process comprising the steps of:

(A) forming the primer layer on the surface of the optical substrate by applying a primer comprising an emulsion containing a dispersed urethane resin in a colloidal particle state or a more bulky particle state in water or a dispersing medium which comprises a mixture of an organic solvent having high affinity with water and water; and

(B) forming the photochromic layer on the primer layer formed in step (A);

wherein the primer is an emulsion comprising a urethane resin having a silanol group and at least one group selected from the group consisting of an acryloyloxy group and a methacryloyloxy group.

2. The optical article according to claim 1, wherein the optical substrate comprises polycarbonate.