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Photochromic epoxy resin composition, cured product thereof, and preparation method and application thereof

An epoxy resin curing and epoxy resin technology, applied in chemical instruments and methods, color-changing fluorescent materials, optics, etc., can solve the problems of insufficient mechanical strength, limited application places, complicated and tedious procedures, etc., and achieve simple equipment and easy control. , the effect of rich functions

Active Publication Date: 2020-11-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a photochromic epoxy resin composition, its cured product and its preparation method and application, to overcome the high azobenzene content in the prior art, resulting in high price, complicated and cumbersome process, Insufficient mechanical strength and limited application places

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  • Photochromic epoxy resin composition, cured product thereof, and preparation method and application thereof
  • Photochromic epoxy resin composition, cured product thereof, and preparation method and application thereof
  • Photochromic epoxy resin composition, cured product thereof, and preparation method and application thereof

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[0055] Another aspect of the embodiments of the present invention also provides a method for preparing a photochromic epoxy resin cured product, which includes: curing the photochromic epoxy resin composition at 80-200°C for 2-6 hours, A photochromic epoxy resin cured product was obtained.

[0056] Further, the components used to synthesize the cured photochromic epoxy resin include:

[0057] Component A: It is an azobenzene epoxy resin with the following structure (1):

[0058]

[0059] R m and R n Can be at least one of H, F, Cl, Br, I, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, nitro, methoxy, k is an integer ≥ 0 , m takes an integer from 1 to 4, and n takes an integer from 5 to 8;

[0060] Component B: Aliphatic epoxy resin or aromatic epoxy resin;

[0061] Component C: curing agent.

[0062] Further, the preparation method of the cured photochromic epoxy resin specifically includes: reacting the mixture comprising component A, component B and curing agent...

Embodiment 1

[0086] Azobenzene epoxy resin (formula 8), bisphenol A epoxy resin (formula 4) are blended by weight 0.5:99.5, then add curing agent (diaminodiphenylmethane, based on azobenzene epoxy resin and 60% of the total mass of bisphenol A epoxy resin) mixed evenly, adding acetone to make the solid content 50wt%, coating the polyester film with a dry film thickness of 20 μm, and keeping the solvent at 80°C and 200°C for 2 hours The epoxy resin coating was obtained, the friction resistance test was 700 times (load 600g), the pencil hardness was 4H, and the photochromic response speed was 10 seconds. Wherein, the 1H-NMR spectrum of the azobenzene epoxy resin monomer of the present embodiment please refer to figure 1 shown.

Embodiment 2

[0088] Azobenzene epoxy resin (formula 8), bisphenol S epoxy resin (formula 6) are mixed by weight 10:90, then add curing agent (diaminodiphenylmethane, based on azobenzene epoxy resin and 60% of the total mass of bisphenol S epoxy resin) and mix evenly, add acetone so that the solid content is 50wt%, and coat the polyester film with a dry film thickness of 20 μm. The epoxy resin coating was obtained, the friction resistance test was 800 times (load 500g), the pencil hardness was 4H, and the photochromic response speed was 10 seconds. For the photochromic absorption curve of the photochromic epoxy resin prepared in this embodiment, please refer to figure 2 shown.

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Abstract

The invention discloses a photochromic epoxy resin composition, a cured product and a preparation method and application thereof. The photochromic epoxy resin composition comprises azobenzene epoxy resin, fatty epoxy resin or aromatic epoxy resin and a curing agent, wherein the azobenzene epoxy resin has a structure as shown in the following formula: Rm and Rn are independently selected from H, F,Cl, Br, I, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, nitryl, methoxyl and the like. Equipment adopted for preparing the photochromic epoxy resin is simple, operation is easy and convenient,control is easy, production efficiency is high so as to be suitable for industrial production. The prepared photochromic epoxy resin has good high hardness, high wear resistance and high mechanical properties, also has fast photochromic speed and mechanical properties, and has important significance in promoting the development of thermosetting epoxy resin functionalization and in the applicationof information storage elements and self-developing holographic recording photographic materials.

Description

technical field [0001] The invention relates to an epoxy resin material, in particular to a photochromic epoxy resin composition, its cured product, its preparation method and application, and belongs to the technical field of polymer materials. Background technique [0002] Photochromic materials refer to a class of materials that change the molecular structure of the material accompanied by a color change under the stimulation of a light source of a specific wavelength, and can be restored under the action of heat or light. In the 1960s, Corning Corporation of the United States first discovered and produced the first photochromic material. After decades of development, the types, application ranges and performance of this type of material have been continuously enriched and improved. At present, photochromic materials have been widely used in various fields such as decoration, protective packaging, smart windows, optical devices, information storage components, and self-im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J5/18C08L63/02C08L63/00C09K9/02G03C1/73C08L67/00
CPCC08J7/0427C08J5/18C09K9/02G03C1/73C08J2367/00C08J2363/02C08J2463/00
Inventor 刘小青曹丽军江艳华
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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