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Silazane hybrid cyanate ester adhesive

A cyanate ester and silazane technology, applied in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of poor high temperature oxidation resistance and insufficient temperature resistance, and achieve improved high temperature performance and improved Temperature resistance and oxidation resistance, the effect of improving high temperature resistance and oxidation resistance

Active Publication Date: 2017-11-28
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a high temperature resistant silazane hybrid cyanate adhesive to solve the problems of insufficient temperature resistance and poor high temperature oxidation resistance of existing cyanate adhesives

Method used

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  • Silazane hybrid cyanate ester adhesive
  • Silazane hybrid cyanate ester adhesive
  • Silazane hybrid cyanate ester adhesive

Examples

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preparation example Construction

[0064] The preparation method of high temperature resistant structural adhesive of the present invention is:

[0065] Add a certain amount of auxiliary filler to 100 parts of cyanate ester or its modified difunctional, oligomer or multifunctional cyanate ester or its prepolymer and mix evenly, then add the corresponding curing agent, mix thoroughly and then degas After 5-10 minutes, it can be used as a high temperature resistant structural adhesive.

[0066] The curing method of the high temperature resistant structural adhesive of the present invention is:

[0067] The adhesive is pre-cured at 30-70°C, preferably 45-60°C, for 1-5 hours, and then heated to 130-240°C, preferably 150-200°C, and the curing time is 1-4 hours.

[0068] Among them, the cyanate is a mixture of one or more of difunctional or multifunctional cyanate, cyanate oligomers, and cyanate prepolymers; the cyanate can be liquid cyanate or cyanate The organic solvent solution of acid ester, the concentration o...

Embodiment 1

[0110] In this embodiment, 80 parts of SiO are added to 100 parts of 4,4'-bis(phenylcyanate)ethane (L10). 2 , 40 parts of ZrB 2 , 10 parts of SiC, 10 parts of TiC as solid filler, 3 parts of SiO 2 As chopped fiber, 3 parts Fe 2 o 3 As a solid pigment, mix thoroughly, then add 20 parts of silazane, and vacuum degass for 5 minutes to obtain a high temperature resistant silazane hybrid cyanate adhesive. The adhesive of the present invention is used in plastics, metals, graphite, ceramics and For the bonding of composite materials, the structural formula of 4,4'-bis(phenylcyanate)ethane (L10) is shown in Formula 1, and the structural formula of silazane is shown in Formula 2.

[0111] The curing process of the high temperature resistant silazane hybrid cyanate adhesive in this example is as follows: pre-cure at 45°C for 2 hours, then raise the temperature to 150°C for 2 hours, cool to room temperature, and test the cured adhesive. Room temperature bond strength of high tempera...

Embodiment 2

[0120]In this embodiment, 80 parts of SiO are added to 100 parts of 4,4'-bis(phenylcyanate)ethane (L10). 2 , 40 parts of ZrB 2 , 10 parts of SiC, 10 parts of TiC as solid filler, 3 parts of SiO 2 As chopped fiber, 3 parts Fe 2 o 3 As a solid pigment, mix well, then add silazane, the mass parts of silazane are (a) 5 parts, (b) 10 parts, (c) 15 parts, (d) 20 parts, (e) 25 parts, (f) 30 parts, after vacuum degassing for 5 minutes, obtain high temperature resistant silazane hybrid cyanate adhesive;

[0121] The present invention selects steel as the bonding substrate, wherein, the structural formula of 4,4'-bis(phenylcyanate)ethane (L10) is shown in Formula 1, and the structural formula of silazane is shown in Formula 2.

[0122] The curing process of the high temperature resistant silazane hybrid cyanate adhesive in this example is as follows: pre-cure at 45°C for 2 hours, then raise the temperature to 150°C for 2 hours, cool to room temperature, and test its room temperature...

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Abstract

The invention relates to the technical field of high-temperature-resistant adhesives, in particular to a silazane hybrid cyanate ester adhesive. The silazane hybrid cyanate ester adhesive is mainly prepared from the following raw materials in parts by mass: 100 parts of cyanate ester, 5-30 parts of silazane, 0-200 parts of solid fillers, 0-20 parts of solid pigments and 0-5 parts of chopped fibers. The silazane hybrid cyanate ester adhesive has the beneficial effects that: the silazane hybrid cyanate ester is used as matrix resin for high-temperature-resistant adhesive, so that temperature resistance and oxidization resistance of cyanate ester are improved; the silazane hybrid cyanate ester is matched with the corresponding filler to prepare the high-temperature-resistant adhesive; when the adhesive property of the cyanate ester adhesive is kept, high temperature performance of the cyanate ester is improved; and the prepared adhesive can meet requirements, on high-temperature-resistant structure adhesive, of the fields such as aviation and aerospace.

Description

technical field [0001] The invention relates to the technical field of high temperature resistant adhesives, in particular to a silazane hybrid cyanate adhesive. Background technique [0002] With the development of high technology, especially the development of aerospace, electronics, machinery, weapons and other industries, higher requirements are put forward for structural adhesives, such as temperature resistance and fatigue resistance. [0003] The current organic structural adhesives mainly include epoxy resin type and polyimide type, etc., but the temperature resistance of epoxy resin-based adhesives is lower than 200 ° C; polyimide type adhesives have good temperature resistance, but the curing High temperature; cyanate resin has good heat resistance and processability, and can be used for bonded structural parts with high heat resistance requirements, but its temperature resistance is still insufficient, and its high temperature oxidation resistance is poor. Conte...

Claims

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Application Information

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IPC IPC(8): C09J179/04C09J183/16C09J11/04C08G73/06
CPCC08G73/0644C08G73/065C08L2201/08C09J11/04C09J179/04C08L83/16C08K13/04C08K3/36C08K3/34C08K3/38C08K7/10C08K3/14
Inventor 罗永明徐彩虹张宗波李永明牟秋红彭丹
Owner INST OF CHEM CHINESE ACAD OF SCI
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