Photochromic polyurethane laminate

Patent metadata

Field	Value
Publication number	US-10330828-B2
Application number	US-201715838037-A
Country	US
Kind code	B2
Filing date	Dec 11, 2017
Priority date	Apr 17, 2009
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A photochromic polyurethane laminate wherein the photochromic polyurethane layer of the laminate has been crosslinked with an isocyanate-active prepolymer using a crosslinking agent. The crosslinking agent is formulated to have at least three functional groups that are reactive with functional groups of the polyurethane or of the isocyanate-active prepolymer. A method of making the photochromic polyurethane laminate includes steps of causing the crosslinking.

First claim

What is claimed is:

1. A photochromic polyurethane laminate comprising:
a crosslinked photochromic polyurethane layer prepared from a composition comprising:
a polyurethane;
an isocyanate prepolymer;
a crosslinking agent comprising a molecule having at least one functional amine group and at least one functional hydroxyl group; and
a photochromic agent;

a first resin layer attached to a first side of the crosslinked photochromic polyurethane layer; and
a second resin layer attached to a second side of the crosslinked photochromic polyurethane layer.

2. The photochromic polyurethane laminate according to claim 1 , wherein the polyurethane is formed from a polycaprolactone diol.

Assignees

• Vision Ease Lp

Inventors

• Vu Hannah
• Sugimura Hideyo
• Fan Ping
• Vu Hao

Classifications

• B29L2011/0016

  Lenses · CPC title

• G02B1/041 Primary

  Lenses · CPC title

• C08G18/10

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• Y10T428/31551

  Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.] · CPC title

• C08G18/4277

  Caprolactone and/or substituted caprolactone · CPC title