Preparation method of high-bonding-strength EVA film for glass fiber reinforced plastic interlayer

A high-adhesion, FRP technology, applied in the direction of adhesives, adhesive types, heat-activated films/sheets, etc., can solve problems such as not meeting the requirements of use, and achieve good reactivity and compatibilization effects, high cohesion, and good thermal adhesion Relay effect

Pending Publication Date: 2021-12-21
安徽省阳明达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

For types that require higher bonding strength, ordinary EVA or even EVA with a large vinyl acetate content still cannot meet the requirements

Method used

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  • Preparation method of high-bonding-strength EVA film for glass fiber reinforced plastic interlayer
  • Preparation method of high-bonding-strength EVA film for glass fiber reinforced plastic interlayer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] At first, the preparation macromolecular coupling agent is to be by in the reactor with agitator, dropping funnel, add 40 parts of EVA of parts by weight, the maleic anhydride of 18 parts and the solvent toluene of 350 parts, in Under the protection of nitrogen, heat and stir to dissolve. Under reflux, add 1.2 parts of dicumyl peroxide toluene solution with a mass fraction of 0.25% dropwise, stir for 90 minutes, cool to 30°C, and then add 35 parts of deionized water to the reaction kettle In the process, heat up to 120°C, heat and keep the temperature at 600rpm and stir for 2 hours, add 8 parts of ethylene glycol glycidyl ether and 0.4 parts of 2-methylimidazole, continue stirring for 2 hours, after the reaction is over, the product is precipitated by methanol and suction filtered The obtained white powder; secondly, the EVA premix is ​​ethylene-vinyl acetate copolymer 115phr, Guangdong Baolin chemical industry grade BL-1180 hydrogenated rosin glyceride 0.8phr, grade PEH...

Embodiment 2

[0020]At first, the preparation macromolecular coupling agent is to be by in the reactor that has stirrer, dropping funnel, adds 35 parts of EVAs of parts by weight, the maleic anhydride of 14 parts and the solvent toluene of 300 parts, in Under the protection of nitrogen, heat and stir to dissolve. Under reflux, add 1.0 parts of dicumyl peroxide toluene solution with a mass fraction of 0.25% dropwise, stir for 80 minutes, cool to 25°C, and then add 30 parts of deionized water to the reaction kettle In the process, heat up to 110°C, heat and maintain a constant temperature of 600rpm and stir for 2 hours, add 8 parts of ethylene glycol glycidyl ether and 0.3 parts of 2-methylimidazole, continue stirring for 1 hour, after the reaction is over, the product is precipitated by methanol and suction filtered The white powder that obtains; Secondly, the EVA premix is ​​ethylene-vinyl acetate copolymer 108phr, Guangdong Baolin Chemical brand BL-1180 hydrogenated rosin glyceride 0.6phr, ...

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Abstract

The invention discloses a preparation method of a high-bonding-strength EVA (Ethylene Vinyl Acetate) film for a glass fiber reinforced plastic interlayer, and belongs to the technical field of EVA interlayer glues. GMA (Glycidyl Methacrylate) is subjected to melt grafting, GMA (Glycidyl Methacrylate) contains a strong-activity epoxy group, and a macromolecular coupling agent is used, so that a good reactive compatibilization effect can be achieved in a blending reaction, the elasticity is high, the EVA film is rubbery and includes enoughpolyethylene crystals which play a physical crosslinking point erole, the EVA film has the characteristics of thermoplastic elastomer, large cohesive force, small surface tension during melting and high thermal bonding force to the surface of epoxy glass fiber reinforced plastic, such as a 3240 epoxy board, and further the chemical resistance, the thermal stability, the weather resistance and the electrical performance are excellent.

Description

technical field [0001] The invention belongs to the technical field of EVA interlayer adhesives, and in particular relates to a preparation method of high bonding strength EVA film for FRP interlayer. Background technique [0002] FRP sandwich material is a composite structural material composed of more than three layers of materials or structures, of which there are two layers of thin and high-strength panel materials. In recent years, many new diaphragm materials have been developed at home and abroad, such as EN sandwich film, EN sandwich film Ethylene and vinyl acetate copolymer is a high-viscosity film material processed by special equipment as the main raw material, also known as EVA laminated glass film. EN film can be used for flat laminated safety glass, curved laminated glass, decorative laminated glass, Bulletproof glass, dimming laminated glass, conductive smart glass, solar cells and other deep-processed glass. The colors of the film are transparent, translucen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F220/32C08F212/08C08F8/08C08F8/46C08F210/02C08F218/08C09J151/06C09J7/10C09J7/35
CPCC08F255/026C08F255/023C08F8/08C09J151/06C09J7/10C09J7/35C09J2301/304C08F220/325C08F212/08C08F8/46C08F210/02C08F218/08
Inventor 陈武杰周正发徐晓敏张华
Owner 安徽省阳明达新材料科技有限公司
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