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Ablation-resistant fire-retardant sealing adhesive and preparation method thereof

A fire-retardant and sealant technology, which is applied in chemical instruments and methods, adhesives, and other chemical processes, can solve the problems of cracking, degumming, loss of bonding performance and sealing performance, and achieve the goal of increasing the viscosity of the system and reducing free movement. Effect of space, good heat resistance

Active Publication Date: 2014-12-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a kind of ablation-resistant, fire-proof and flame-retardant sealant based on silicone resin and inorganic additives, aiming at the problems of ordinary sealant materials cracking under high temperature conditions, degumming and loss of bonding performance and sealing performance. and its preparation method

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  • Ablation-resistant fire-retardant sealing adhesive and preparation method thereof

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Embodiment 1

[0033] A kind of ablation-resistant, fire-proof flame-retardant sealant, by weight, comprises the following components: Silicone polymer: 50 parts (PHMS and D 4 Vi ratio is 1:1), feldspar powder: 25 parts, platinum complex catalyst: 1 part (methyl vinyl siloxane coordination platinum catalyst), methyl cellulose: 3 parts, fumed silica: 2 parts, TaC: 12 parts, γ-aminopropyltriethoxysilane: 0.3 parts, BN whiskers: 5 parts.

[0034] The preparation method is:

[0035] (1) Weigh 5 parts of BN whiskers, 25 parts of feldspar powder, and 12 parts of TaCl and soak in 0.3 parts of γ-aminopropyltriethoxysilane for 30 minutes for surface treatment; the particle size of the feldspar is 1-10um , TaC particle size 2 ~ 5um;

[0036] (2) Weigh 50 parts of siloxane polymer (PHMS and D 4 The ratio of Vi is 1:1), 1 part of platinum complex catalyst, BN whiskers, feldspar powder, TaC, 3 parts of methyl cellulose and 2 parts of fumed silica after step 1), followed by Stir evenly after adding un...

Embodiment 2

[0040] A kind of ablation-resistant, fireproof and flame-retardant sealant, by weight, comprises the following components: Silicone polymer: 60 parts (PHMS and D 4 Vi ratio is 1:1.5), mica powder: 30 parts, platinum complex catalyst: 1.5 parts (chloroplatinic acid (H 2 Ptcl 6 .6H 2 O), hydroxypropyl methylcellulose: 3 parts, organic bentonite: 5 parts (calcium-based organic bentonite), TiO 2 : 20 parts, γ-glycidyloxypropyltrimethoxysilane: 0.2 parts, SiC whiskers: 8 parts.

[0041] The preparation method is:

[0042] (1) Weigh 8 parts of SiC whiskers, 30 parts of mica powder, TiO 2 : 20 parts are immersed in 0.2 parts of γ-glycidyl etheroxypropyl trimethoxysilane for 30 minutes for surface treatment; the particle size of the mica powder is 1-10um, TiO 2 Particle size 2 ~ 5um;

[0043] (2) Weigh 60 parts of siloxane polymer (PHMS and D 4 The ratio of Vi is 1:1.5), 1.5 parts of platinum complex catalyst, SiC whiskers, mica powder, TiO 2 , and 3 parts of hydroxypropyl met...

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Abstract

The invention discloses an ablation-resistant fire-retardant sealing adhesive and a preparation method thereof. The ablation-resistant fire-retardant sealing adhesive comprises the following component in parts by weight: 35-60 parts of siloxane polymers, 20-40 parts of silicate mineral fillers, 1-2 parts of platinum complex catalysts, 2-5 parts of thickening agents, 1-5 parts of thixotropic agents, 5-20 parts of high-melting point metal compounds, 0.1-0.5 part of silane coupling agents and 5-10 parts of high-temperature-resistant whisker reinforcing materials. The ablation-resistant fire-retardant sealing adhesive disclosed by the invention has good sealability and adhesion at normal temperature, and has the advantage that a high-temperature split product can be subjected to ceramic reaction with an inorganic filler to form a ceramic sealing layer with adhesion and self healing properties, thus ensuring that the materials have good sealing and adhesion effect under the condition of high temperature. The ablation-resistant fire-retardant sealing adhesive disclosed by the invention is mainly applied to the fields of sealing, plugging and adhesion of a special position under the condition of high temperature.

Description

technical field [0001] The invention belongs to the field of ablation-resistant, fire-proof and flame-retardant sealant, and relates to an ablation-resistant, fire-proof and flame-retardant sealant and a preparation method thereof. Background technique [0002] Due to the requirements of special environments, ablation-resistant, fire-resistant and flame-retardant sealants must have high-performance properties such as high-temperature resistance, fire-proof and flame-retardant, small thermal expansion coefficient, no obvious shrinkage or cracking, and excellent bonding performance. Although the existing sealant can meet the application requirements in some fields, it is far from satisfying the problems of easy loss of bonding performance under high temperature conditions, cracks on the surface, easy falling off, decreased viscoelasticity, and poor air tightness. Application requirements in special environments, especially ablative environments. Therefore, in the fields of ab...

Claims

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Application Information

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IPC IPC(8): C09J183/05C09J11/04C09J11/06C09J11/08C09K3/10
Inventor 秦岩黄志雄饶志龙张曦
Owner WUHAN UNIV OF TECH
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