Ablation type sealing silicone rubber adhesive and preparation method thereof

A silicone rubber and adhesive technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of poor adhesion performance, ablation resistance and scratch performance, and achieve good application prospects. The effect of excellent environmental adaptability

Pending Publication Date: 2021-11-02
贵州航天风华精密设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of poor bonding performance, ablation resistance, and scratching performance of existing adhesives, the present invention provides an adhesive formula suitable for high-temperature

Method used

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  • Ablation type sealing silicone rubber adhesive and preparation method thereof
  • Ablation type sealing silicone rubber adhesive and preparation method thereof
  • Ablation type sealing silicone rubber adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Example 1

[0024] An ablative seal silicone rubber adhesive composition in parts by weight:

[0025] Part A: methylene bis-phenyl RTV silicone rubber 100 parts, 1 part of fumed silica, 3 parts of talc, 4 parts of a silane coupling agent, 3 parts of toluene;

[0026] Part B: 5 parts of ethyl orthosilicate;

[0027] Component C: dibutyl tin dilaurate 0.7 parts.

[0028] 2, preparation method of the ablative seal silicone rubber adhesive, is weighed first by formula methylene bis-phenyl RTV silicone rubber, fumed silica, talc, a silane coupling agent, and toluene to obtain formulations A component, when used to add C component and the B component were mixed, and then the mixture was placed on a spatula blade, with a doctor blade to scrape the mixture back and forth, to further ensure the uniformity of the compound, in order to achieve acceptable ablated adhesive type silicone rubber seal.

Example Embodiment

[0029] Example 2

[0030] One kind of ablative seals silicone rubber adhesive composition in parts by weight:

[0031] Part A: methylene bis-phenyl RTV silicone rubber 100 parts, 1 part of fumed silica, 2 parts of talc, 4 parts of a silane coupling agent, 3 parts of toluene;

[0032] Part B: 5 parts of ethyl orthosilicate;

[0033] Component C: dibutyl tin dilaurate 0.3 parts.

[0034] Adhesives prepared in Preparation Example 1 embodiment.

Example Embodiment

[0035] Example 3

[0036] One kind of ablative seals silicone rubber adhesive composition in parts by weight:

[0037] Part A: methylene bis-phenyl RTV silicone rubber 100 parts, 5 parts of fumed silica, 4 parts of talc, 3 parts of a silane coupling agent, 6 parts of toluene;

[0038] B component: 8 parts of tetraethylorthosilicate;

[0039] Component C: dibutyl tin dilaurate 0.8 parts.

[0040] Adhesives prepared in Preparation Example 1 embodiment.

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Abstract

The invention relates to the technical field of adhesive preparation, in particular to an ablation type sealing silicone rubber adhesive and a preparation method thereof. According to the ablative sealing silicone rubber adhesive, methyl biphenyl room temperature vulcanized silicone rubber, fumed silica, talcum powder, a silane coupling agent and methylbenzene are adopted as raw materials, tetraethoxysilane is adopted as a cross-linking agent, and dibutyltin dilaurate is adopted as a catalyst. Through reasonable proportion design, the surface of a component is coated with the adhesive, and after the adhesive is cured at normal temperature, an adhesive layer with excellent ablation resistance, adhesive performance and environmental adaptability can be formed; the elongation at break of the adhesive reaches 168%, the shear strength at the normal temperature reaches 1.63 MPa, the shear strength at the high temperature (300 DEG C) reaches 0.28 MPa, all the other indexes meet the standard requirements, and the engineering application requirements of aircraft products can be met.

Description

technical field [0001] The invention relates to the technical field of adhesive preparation, in particular to an ablation-type sealing silicone rubber adhesive and a preparation method thereof. Background technique [0002] The improvement of the comprehensive performance of aerospace vehicles in terms of range, flight speed, hit accuracy and defense penetration capability also puts forward higher requirements for the high-temperature sealing of the aircraft during flight. The single-component silicone rubber adhesive widely used at present can no longer meet the coating and sealing requirements of new aircrafts in terms of bonding performance, ablation resistance, and scratching performance. Based on the demand for the sealing technology of a new type of product fairing, the research on the molding formula and preparation process of ablative methyl biphenyl room temperature vulcanized silicone rubber adhesive was carried out. After theoretical analysis, material screening,...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC09J183/04C09J11/04C09J11/06C08K3/36C08K3/34C08K5/5415C08K5/54C08K13/02
Inventor 胡翠张绍波黄田燕鲁学峰
Owner 贵州航天风华精密设备有限公司
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