Photochromic composition, product and preparation method of hyperbranched polyurethane vinyl ether

A technology of polyurethane vinyl ether and photochromism, which is applied in the field of optical films, can solve the problems of high cost burden, waste of color changing powder, and inability to prepare high value-added lenses, and achieve the effect of increasing crosslinking density and improving solvent resistance
CN112708344BActive Publication Date: 2022-01-11P&E TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
P&E TECH CO LTD
Publication Date
2022-01-11

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Abstract

The invention provides a photochromic composition, product and preparation method of hyperbranched polyurethane vinyl ether. The composition includes polyol, diisocyanate, solvent, catalyst, trihydric alcohol, tetrahydric alcohol, polymerization inhibitor, 4 ‑Hydroxybutyl vinyl ether, leveling agent, defoamer, ultraviolet light absorber, antioxidant, mercaptan and photochromic dye, the composition is coated on the base material, and cured by EB to make optical products. In the present invention, diisocyanate and polyol are pre-polymerized into oligomers, then trihydric alcohols and tetrahydric alcohols are used to polymerize into polyurethane prepolymers with hyperbranched structure, and then 4-hydroxybutyl vinyl ether is used to end-block. The hyperbranched polyurethane containing vinyl ether is obtained, and finally mixed with mercaptan and photochromic fuel to form a radiation-curable composition. The composition has high refractive index, anti-oxidation inhibition and excellent adhesion performance.
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Description

technical field

[0001] The invention belongs to the field of optical films, and in particular relates to a hyperbranched polyurethane vinyl ether photochromic composition, product and preparation method, which are mainly used in the production and processing of color-changing glasses and color-changing films. Background technique

[0002] At present, there are two types of color-changing glasses on the market. One is the color-changing of the base material, which is to dissolve the photochromic powder in the resin or monomer, and then pour it into the mold and cure it at high temperature. This process has the following defects: 1) when the color changes, the depth of the color change is different, and the vision of panda eyes is easy to appear, which brings extremely bad visual experience to customers; 3) Due to the limitation of raw materials, this process can only produce 1.56 and 1.61 lenses, and cannot produce 1.67 or 1.71 high value-added lenses.

[0003] Coating disco...

Claims

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