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Grouting material and preparation method thereof

A grouting material and raw material technology, applied in the direction of adhesive additives, non-polymer adhesive additives, etc., can solve the problem of uncontrollable curing time at room temperature, poor fluidity, mechanical properties (tensile strength and bonding performance (low tear strength). and other problems, to achieve the effect of good bonding performance and process performance, good fluidity, and adjustable curing time

Inactive Publication Date: 2017-11-24
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing grouting materials use epoxy resin / polysulfide rubber system. This type of material uses epoxy resin and polysulfide rubber as the base material. The mechanical properties of the body (tensile strength, elongation), oxyacetylene ablation rate and The bonding performance with the interface (tear-off strength, shear strength) is low, and there are problems of poor fluidity and uncontrollable curing time at room temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: 100 g of hydroxyl-terminated polybutadiene (the hydroxyl group is 0.45*10 -4 mol / g), glycerin 4.5g, filler 30g, catalyst 0.1g and curing agent 17g.

Embodiment 2

[0021] Embodiment 2: 100g of hydroxyl-terminated polybutadiene (the hydroxyl group is 0.45*10 -4 mol / g), glycerin 3g, filler 30g, catalyst 0.3g and curing agent 11.6g.

Embodiment 3

[0022] Embodiment 3: 100g of hydroxyl-terminated polybutadiene (the hydroxyl group is 0.45*10 -4 mol / g), glycerin 6g, filler 30g, catalyst 0.5g and curing agent 24.8g.

[0023] The corresponding relationship between the dosage of the catalyst and the complete curing time is: 0.1 part, the curing time is 7 days, 20~25 ℃; 0.3 part, the curing time is 4 days, 20~25 ℃; 0.5 part, the curing time is 2 days, 20~25 25°C.

[0024] The concrete preparation method of above-mentioned grouting material is as follows:

[0025] (1) Raw material preparation

[0026] a) The raw materials of each component are inspected before use, and the raw materials are required to have a certificate of conformity and be used within the validity period of the verification;

[0027] b) The filler must be sieved through a 120-mesh copper screen before use, and the zinc oxide is evenly sieved without agglomeration; remove impurities;

[0028] c) Put the sieved filler into the oven for drying, and dry it fo...

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PUM

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Abstract

The invention discloses a grouting material and a preparation method thereof. The grouting material comprises the following raw materials by weight: 100 parts of hydroxyl terminated polybutadiene, 0.45 part of a cross-linking agent, 30 parts of filler, 0.1-0.5 part of a catalyst and a curing agent. The preparation method includes: firstly sieving filler, taking the siftage and performing drying; then mixing hydroxyl terminated polybutadiene and the cross-linking agent evenly, adding the curing agent, the filler and the catalyst in order, and mixing the substances evenly after each adding; and finally conducting vacuum pumping treatment, thus obtaining the grouting material. The grouting material provided by the invention has good body, bonding performance and technological properties, and can repair the defect space of solid rocket engine charge combustion chamber third interfacial debonding. The system of the grouting material is consistent with the lining and grain, has good compatibility, can improve the aging performance and prolong the service life, has good fluidity, and can realize room temperature curing.

Description

technical field [0001] The invention belongs to the technical field of solid rocket motor manufacturing, and in particular relates to a grouting material. Background technique [0002] The bonding interface structure of the charge combustion chamber of the solid rocket motor is the shell and the heat insulating layer, the heat insulating layer and the liner, the liner and the grain, and the third interface is between the liner and the grain. At present, the engine charge generally adopts the composite solid propellant formula based on butadiene rubber. Practice has shown that the debonding of the third interface will cause the burning surface of the engine grain to increase instantaneously, the working pressure will increase sharply, and in severe cases, an explosion will occur, resulting in the failure of the test. Research on grouting repair technology has been carried out both at home and abroad. The existing grouting materials use epoxy resin / polysulfide rubber system....

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J11/04C08G18/76C08G18/69C08G18/65C08G18/32
CPCC08G18/3206C08G18/6588C08G18/69C08G18/7614C08K2003/2296C09J11/04C09J175/14
Inventor 胡秀太万孝国黄刘华
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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