Title:
POLYURETHANE-BASED PHOTOCHROMIC RESIN LENS AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/178928
Kind Code:
A1
Abstract:
A polyurethane-based photochromic resin lens and a preparation method therefor. The lens comprises the following components: 100 parts by weight of a polyurethane monomer, 0.01-0.1 part by weight of an initiator, 0.1-10 parts by weight of an additive and 0.01-0.2 part by weight of a color-changing powder, wherein the additive is a molecular weight modifier. The color of a substrate of the photochromic resin lens is changed by using a polyurethane base; the photochromic resin lens has a good impact strength and good photochromic effect; the visible light transmittance of the lens after hard coating can reach about 93%, and the visible light transmittance is only 15-25% after the deepest color-changing depth is reached under the irradiation of ultraviolet light. The preparation process for the lens is simple and easy to operate, and not only can same be used for preparing a single vision lens, but also can be used for preparing a bifocal lens, a trifocal lens and a multifocal lens. The advantages thereof are greater than that of a spin-coated color-changing lens, and the preparation cost of the lens is far lower than that of the spin-coated color-changing lens. The lens has great advantages and is easy to popularize.
Inventors:
WANG CHUANBAO (CN)
SHI LIANGLIANG (CN)
YAN QINGBO (CN)
SHI LIANGLIANG (CN)
YAN QINGBO (CN)
Application Number:
PCT/CN2021/081296
Publication Date:
September 01, 2022
Filing Date:
March 17, 2021
Export Citation:
Assignee:
JIANGSU CONANT OPTICAL CO LTD (CN)
SHANGHAI CONANT OPTICAL CO LTD (CN)
SHANGHAI CONANT OPTICAL CO LTD (CN)
International Classes:
C08G18/38; C08G18/48; C08K5/00; C09K9/02; G02B1/04; G02B5/23; G02C7/02; G02C7/10
Domestic Patent References:
| WO2020158813A1 | 2020-08-06 | |||
| WO2020203869A1 | 2020-10-08 |
Foreign References:
| CN109294208A | 2019-02-01 | |||
| CN109843957A | 2019-06-04 |
Attorney, Agent or Firm:
BEIJING SICHUANG DACHENG INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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