Modified epoxy resin sealant, and preparation method thereof

A technology of epoxy resin and sealant, applied in the direction of epoxy resin coating, application, coating, etc., can solve the problems of yellowing of sealant, cross-linked network structure, migration, etc., to solve the problem of yellowing resistance and mildew Effect

Active Publication Date: 2019-08-23
上海凯矜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can play a certain anti-yellowing effect during use, because the antioxidant or ultraviolet absorber cannot form a cross-linked network structure with the resin matrix, migration will occur during long-term use, and the sealant will turn yellow.

Method used

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  • Modified epoxy resin sealant, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A modified epoxy resin sealant, including two components A and B: wherein, component A mainly includes 100 parts of bisphenol A epoxy resin (E44), trimethylolpropane triglycidyl ether and C 12-14 8 parts of aliphatic glycidyl ether mixture (mass ratio 1:0.3), 2 parts of complex light stabilizer, 3 parts of methyltrimethoxysilane, 1 part of tetramethylammonium acetate; component B mainly includes formazan 100 parts of base hexahydrophthalic anhydride, 2 parts of polypropylene glycol diglycidyl ether, 1 part of methyltrimethoxysilane; the light stabilizer is ultraviolet absorber (UV-531): OCTA292: tea polyphenol= 1:2.5:2.5, the content of ester catechin is 73%. The preparation method of described modified epoxy resin sealant is as follows:

[0031] Preparation of glue A:

[0032] (1) Preparation of compound light stabilizer: UV absorber, OCTA292 light stabilizer, and tea polyphenols were sequentially added to the ethanol solution according to the mass ratio, and the amo...

Embodiment 2

[0036] A modified epoxy resin sealant, including two components A and B: wherein, component A mainly includes 100 parts of bisphenol A epoxy resin (E51), trimethylolpropane triglycidyl ether and C 12-14 A mixture of aliphatic glycidyl ether (mass ratio 1:0.3) in total 8 parts, compound light stabilizer 3 parts, methyltrimethoxysilane 3.6 parts, tetramethylammonium acetate 0.5 parts; B component mainly includes 100 parts of phthalic anhydride, 2 parts of polypropylene glycol diglycidyl ether, 1 part of methyltrimethoxysilane; the light stabilizer is an ultraviolet absorber (UV-531): OCTA292: tea polyphenols=1: 2.5: 2.5, wherein the content of ester catechins is 73%. The preparation method is the same as in Example 1.

Embodiment 3

[0038] A modified epoxy resin sealant, including two components A and B: wherein, component A mainly includes 100 parts of bisphenol F epoxy resin (NPEF-170), trimethylolpropane triglycidyl ether and C 12-14 A mixture of aliphatic glycidyl ether (mass ratio 1:0.3) in total 9 parts, compound light stabilizer 3 parts, methyltrimethoxysilane 3.6 parts, tetrabutylammonium acetate 0.5 parts; B component mainly includes formazan 100 parts of base hexahydrophthalic anhydride, 2 parts of polypropylene glycol diglycidyl ether, 1 part of methyltrimethoxysilane; the light stabilizer is an ultraviolet absorber (UV-531): OCTA292: tea polyphenols= 1:2.5:2.5, wherein the content of ester catechin is 73%. The preparation method is the same as in Example 1.

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Abstract

The invention relates to an anti-yellowing antibacterial modified epoxy resin sealant. The anti-yellowing antibacterial modified epoxy resin sealant comprises a component A and a component B; the component A comprises 100 parts of epoxy resin, 5 to 12 parts of a diluents, 0.3 to 5 parts of a light stabilizing agent, 0.5 to 10 parts of a coupling agent, and 0.2 to 5 parts of a dispersant; the component B mainly comprises 100 parts of a curing agent, 0.2 to 5 parts of a flexibilizer, and 0.2 to 3 parts of a coupling agent; the light stabilizing agent is composed of an ultraviolet ray absorber, OCTA292 type light stabilizing agent, and tea polyphenol at a mass ratio of 1:2-5:2-5. The composite light stabilizing agent is introduced into the anti-yellowing antibacterial modified epoxy resin sealant, so that the composite light stabilizing agent is capable of realizing effective combination of the ultraviolet ray absorber, the light stabilizing agent, and the anti-oxidant through structure optimization, and yellowing problem of sealant after long term of using is solved; and in addition, the introduced tea polyphenol type anti-oxidant possesses antibacterial mildew-resistant effect.

Description

technical field [0001] The invention belongs to the technical field of sealant, in particular to the technical field of an environment-friendly high-transparency electronic sealant. Background technique [0002] LED packaging is the packaging of light-emitting chips, which is quite different from integrated circuit packaging. LED packaging is not only required to protect the wick, but also to be able to transmit light, so LED packaging has higher requirements for light transmittance. Among many LED sealants, epoxy resin-based sealants have excellent airtightness and high bonding strength, and are widely used in the sealing of high-vacuum and high-airtight parts in aerospace, electronics, machinery and other fields. bonding. However, epoxy resin is very easy to yellow, how to inhibit the yellowing of epoxy resin is the key to determine the performance of epoxy resin sealant. [0003] Usually, the main channel to suppress the yellowing of epoxy resin sealants is to add ultra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D11/06C09D11/08
CPCC08L2205/025C08L2205/035C09D11/06C09D11/08C09D163/00C08L63/00C08L71/02C08K5/132C08K5/13
Inventor 杨向娟杰苏尔·艾合麦提
Owner 上海凯矜新材料科技有限公司
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