High-temperature-resisting structural adhesive film capable of being stored for long time at room temperature and preparation method thereof

A long-term storage, high temperature resistant technology, used in adhesives, polymer adhesive additives, film/flaky adhesives, etc. The effect of low manufacturing cost, resin toughening micro-crack growth ability, good ablation resistance

Active Publication Date: 2016-06-22
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 r

Method used

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  • High-temperature-resisting structural adhesive film capable of being stored for long time at room temperature and preparation method thereof
  • High-temperature-resisting structural adhesive film capable of being stored for long time at room temperature and preparation method thereof
  • High-temperature-resisting structural adhesive film capable of being stored for long time at room temperature and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0030] Specific embodiment 1: A high temperature resistant structural adhesive film that can be stored for a long time at room temperature in 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 toughening modifier, 1-2 parts coupling agent, 1-3 parts thermal conductive material, and 1-3 parts inorganic filler and carrier.

Example Embodiment

[0031] Specific embodiment two: this embodiment is different from specific embodiment one in that: 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 of any ratio. Others are the same as the first embodiment.

Example Embodiment

[0032] Specific embodiment three: This embodiment is different from specific embodiment one or two in that: the toughening modifier is made of polyether ketone with hydroxyl end groups, polyether amide with hydroxyl end groups, amine end groups or anhydride end groups. One or more of imines, polyphenylene ethers with hydroxyl end groups, and polyaryl ether ketones with hydroxyl end groups are composed in an arbitrary ratio. Others are the same as 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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IPC IPC(8): C09J7/04C09J179/04C09J11/04C09J11/08C09J11/06
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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