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A high temperature resistant structural adhesive film that can be stored for a long time at room temperature and preparation method thereof

A long-term storage and high-temperature-resistant technology, applied in the direction of adhesives, polymer adhesive additives, film/sheet adhesives, etc., can solve the problems of short storage period of structural adhesive films at room temperature and high toxicity of combustion smoke, and achieve Resin toughened micro-crack expansion ability, low manufacturing cost, and increased interface bonding and bond strength effects

Active Publication Date: 2018-04-17
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of short storage period at room temperature and high toxicity of combustion smoke in the existing structural film

Method used

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  • A high temperature resistant structural adhesive film that can be stored for a long time at room temperature and preparation method thereof
  • A high temperature resistant structural adhesive film that can be stored for a long time at room temperature and preparation method thereof
  • A high temperature resistant structural adhesive film that can be stored for a long time at room temperature and preparation method thereof

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Experimental program
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specific Embodiment approach 1

[0030] Specific implementation mode 1: A high-temperature-resistant structural adhesive film that can be stored for a long time at room temperature according to this embodiment is composed of 75-100 parts by mass of benzoxazine resin, 10-20 parts of process modifier, It is made of 10-20 parts of toughening modifier, 1-2 parts of coupling agent, 1-3 parts of heat-conducting material and 1-3 parts of inorganic filler and carrier.

specific Embodiment approach 2

[0031] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the benzoxazine resin is composed of bisphenol A type benzoxazine, phenolphthalein type benzoxazine, bisphenol F type benzoxazine, 4, One or more of 4-diaminodiphenylmethane-type benzoxazine, dicyclopentadiene-type benzoxazine, and thiobisphenol-type benzoxazine are composed in any ratio. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0032] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the toughening modifier is made of polyether ketone with hydroxyl end groups, polyether ketone with hydroxyl end groups, amine end groups or anhydride end groups. One or more of imine, polyphenylene ether with hydroxyl end group and polyaryletherketone with hydroxyl end group are composed in any ratio. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a high-temperature-resisting structural adhesive film capable of being stored for a long time at the room temperature and a preparation method thereof and relates to a structural adhesive film and a method for preparing the adhesive film. The structural adhesive film and the method for preparing the adhesive film aim to solve the problems that an existing structural adhesive film is short in room temperature storage life, and combusted smoke is high in toxin. The adhesive film is composed of polybenzoxazine resin, a toughening agent, modifier, a heat conduction material, a coupling agent, inorganic filler and a carrier. The preparation method includes the steps that firstly, process modifier and toughening modifier are subjected to prepolymerization in a reaction kettle, then the polybenzoxazine resin is added and stirred to be uniform, and modified polybenzoxazine resin is obtained; then, the modified polybenzoxazine resin is subjected to vacuum kneading with the silane coupling agent, the heat conduction material and the inorganic filler through a kneading machine, and an adhesive material is obtained; finally, the adhesive material is subjected to hot pressing with the carrier on an adhesive film calender to be made into the film, and the high-temperature-resisting structural adhesive film can be obtained. The high-temperature-resisting structural adhesive film has the advantages of being flame retardant, low in smoke, low in toxin, capable of achieving complete curing at the temperature of 185 DEG C, high in adhesion strength and good in high temperature resistance; the adhesive film is stored for 180 days at the room temperature, and process performance and adhesion performance maintain unchanged.

Description

technical field [0001] The invention relates to a structural adhesive film and a method for preparing the adhesive film. Background technique [0002] The high temperature resistant structural adhesives in the aerospace field mainly include epoxy resin type, double horse resin type and cyanate ester resin type. These adhesives generally need to be stored at low temperature, and generally stored at room temperature for about 20 days. In addition, if these adhesives do not add flame retardants, most of the smoke released after burning is highly toxic. It cannot meet the requirements of flame retardancy, low smoke and low toxicity. [0003] Therefore, it is of great significance to develop a long-term room temperature storage period, flame-retardant, low-smoke and low-toxicity adhesive film to meet the requirements of high-temperature resistant adhesives in the aerospace field, and it is expected to be applied in various types of aerospace. Contents of the invention [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/30C09J179/04C09J11/04C09J11/08C09J11/06
CPCC08L2201/02C08L2201/08C08L2205/025C08L2205/03C08L2205/035C09J7/21C09J7/30C09J11/04C09J11/06C09J11/08C09J179/04C08L79/04C08L71/00C08L71/12C08K13/02C08K13/04C08K7/06C08K2003/385C08K2003/2241C08K5/18
Inventor 李洪峰曲春艳王德志张杨宿凯冯浩刘长威杨海冬肖万宝王海民关悦瑜
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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