PHOTOCHROMIC COMPOSITION OF HYPER-BRANCHED POLYURETHANE VINYL ETHER, ARTICLE, AND PREPARATION METHOD

WIPO Patent Application WO/2022/147863

A1

Provided are a photochromic composition of a hyper-branched polyurethane vinyl ether, an article, and a preparation method. The composition comprises a polyol, a diisocyanate, a solvent, a catalyst, a trihydric alcohol, a tetrahydric alcohol, a polymerization inhibitor, 4-hydroxybutyl vinyl ether, a leveling agent, a defoaming agent, an ultraviolet absorber, an antioxidant, a thiol, and a photochromic dye. The composition is applied to a substrate material and undergoes EB curing to prepare an optical product. The present invention involves: first pre-polymerizing a diisocyanate and a polyhydric alcohol into an oligomer, then sequentially using a trihydric alcohol and a tetrahydric alcohol to synthesize a polyurethane prepolymer with a hyper-branched structure, then carrying out blocking with 4-hydroxybutyl vinyl ether to obtain a hyper-branched polyurethane containing vinyl ether, and finally, mixing same with a thiol and a photochromic fuel to obtain a radiation-curable composition. The composition has a relatively high refractive index, oxygen resistance, inhibition resistance, and a good adhesive force performance.

SHEN LIQUAN (CN)
YUE SHAOJIE (CN)
FU ZAIWEI (CN)
ZHOU NA (CN)

PCT/CN2021/074166

July 14, 2022

January 28, 2021

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P&E TECH CO LTD (CN)

C09D175/14; C08G18/83

CN107513345A	2017-12-26
CN105164175A	2015-12-16
CN105384906A	2016-03-09
CN101512386A	2009-08-19
CN102627910A	2012-08-08
CN106833338A	2017-06-13
US20090280329A1	2009-11-12
US20090280709A1	2009-11-12
US20080067701A1	2008-03-20

CHENGGUO INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)

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