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Flame-retardant intermediate-temperature cured epoxy film and preparation method thereof

An epoxy adhesive, flame retardant technology, applied in the field of epoxy adhesive film and its preparation, can solve the problem that epoxy adhesive film cannot satisfy good flame retardant performance and toughness at the same time, and achieve the effect of good toughness and good flame retardant performance

Active Publication Date: 2013-06-12
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the epoxy adhesive film prepared by the existing preparation method cannot satisfy good flame retardancy and good toughness at the same time, and provides a flame-retardant medium-temperature curing epoxy adhesive film and its preparation method

Method used

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  • Flame-retardant intermediate-temperature cured epoxy film and preparation method thereof

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specific Embodiment approach 1

[0027] Specific embodiment 1: This embodiment is a flame-retardant medium-temperature curing epoxy film, which is composed of 60 to 100 parts of bisphenol epoxy resin and 5 to 30 parts of reactive diluent in parts by weight. , 10-30 parts of toughening resin, 0.5-3 parts of silane coupling agent, 5-13 parts of latent curing agent, 1-4 parts of curing accelerator, 1-5 parts of coating It is prepared from red phosphorus and 2-10 parts of hydroxide.

[0028] The advantages of this embodiment: 1. A flame-retardant medium-temperature curing epoxy film of this embodiment has good flame-retardant properties, and its epoxy index is above 26; 2. A flame-retardant epoxy film of this embodiment The medium-temperature curing epoxy film has good toughness. After curing, the shear strength at room temperature can reach 34.5MPa, and the shear strength can reach 20.4MPa at 80°C; the peel strength of its honeycomb roller can reach 420kg·mm / 75mm.

specific Embodiment approach 2

[0029] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the bisphenol-type epoxy resin is bisphenol F epoxy resin or bisphenol A epoxy resin, wherein, bisphenol F epoxy resin The epoxy value of bisphenol A epoxy resin is 0.20 to 0.58; the epoxy value of bisphenol A epoxy resin is 0.20 to 0.58. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the reactive diluent is resorcinol diglycidyl ether, trimethylolpropane triglycidyl ether, neopentyl glycol One or a mixture of diglycidyl ether and polypropylene glycol diglycidyl ether. Others are the same as in the first or second embodiment.

[0031] Each component in the mixture described in this embodiment is in any ratio.

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Abstract

The invention discloses a flame-retardant intermediate-temperature cured epoxy film, which relates to field of epoxy films and preparation methods thereof and solves the problem that the epoxy film prepared by the conventional preparation method cannot achieve good flame retardant property and good toughness at the same time. The flame-retardant intermediate-temperature cured epoxy film is prepared from bisphenols epoxy resin, reactive diluent, toughened resin, a silane coupling agent, a latent curing agent, a curing accelerator, encapsulated red phosphorous and hydroxide. The preparation method comprises the following steps: step 1, preparing raw materials; step 2, preparing matrix resin; step 3, preparing sizing material; and step 4, pressing to obtain the film. The epoxy index of the flame-retardant intermediate-temperature cured epoxy film prepared by the preparation method disclosed by the invention is over 26; and after the cured epoxy film is cured, the room shearing strength can reach 34.5MPa, the shearing strength at 80 DEG C can reach 20.4MPa, and the honeycomb cylinder stripping strength can reach 420 kg.mm / 75mm.

Description

technical field [0001] The invention relates to the field of epoxy adhesive film and its preparation method. Background technique [0002] Epoxy adhesive film has excellent structural bonding performance and durability reliability, and has the characteristics of one-component easy operation and uniform glue application. It is widely used in the bonding of honeycomb sandwich structures in aerospace, high-speed trains, ships and other fields. The currently used epoxy film basically does not have flame retardant properties, and the oxygen index is generally around 20. To achieve good flame retardant properties, the oxygen index is required to reach 26. With the development of civil aviation, high-speed trains, ships and other fields in recent years, epoxy films are required to have good flame retardancy. Traditional halogen flame retardant methods, such as brominated epoxy, have high flame retardant efficiency and good effect, but the toxicity and corrosiveness of the smoke re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/02C09J11/04C09J11/06C09J11/08
Inventor 赵玉宇段恒范何影翠吴健伟赵汉清匡弘付春明
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI