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A kind of high solid content ddi-htpb propellant with improved process performance and its processing technology

A technology with high solid content and process performance, applied in explosive processing equipment, offensive equipment, compressed gas generation, etc., can solve problems such as poor process performance, achieve good mechanical properties, ensure safety performance, and be beneficial to actual production.

Active Publication Date: 2021-03-23
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to solve the problem of poor process performance of high solid content DDI-HTPB propellant, to provide a formulation of high solid content DDI-HTPB propellant with improved process performance, by adding a small amount of highly reactive isocyanate in the formulation to cure In order to achieve the purpose of improving the technical performance of DDI-HTPB propellant, the processing technology of the above formula is provided, the order of addition is clarified, and the time of adding curing agent is advanced to further improve the technical performance of DDI-HTPB propellant , and the propellant can still maintain the special combustion performance and good mechanical properties of the propellant with DDI as the curing agent

Method used

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  • A kind of high solid content ddi-htpb propellant with improved process performance and its processing technology
  • A kind of high solid content ddi-htpb propellant with improved process performance and its processing technology
  • A kind of high solid content ddi-htpb propellant with improved process performance and its processing technology

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high estimate of process performance DDI-HTPB propellant, which is shown in Table 1.

[0030] Table 1 Proposal formula composition

[0031]

[0032] The main processing process of the above-mentioned formulation production propellant is: the mixed temperature of the slurry is 50 ° C, adding MDI and DDI after adding MDI and DDI after the oxidant AP is added, and then continues to mix 55min, the process performance test results of the resulting propulsion phama Table 2, where η is a slurry viscosity.

[0033] Table 2 Process Performance Test Results of Progressive Formulation Phase

[0034] Hybrid process Time, H 1h 3h 5h test temperature 1# η / pa · 582.3 617.1 703.9 50℃

[0035] As can be seen from Table 2, the solid content of the propellant is as high as 87%, adding 0.18% of the isocyanate curing agent MDI and the curing catalyst, and the propellant formulation of DDI is a curing agent, mixed under 50 degrees. The process of the resulting...

Embodiment 2

[0041] A high estimate of process performance DDI-HTPB propellant, which is shown in Table 4.

[0042] Table 4 propellant formulation

[0043]

[0044] The main processing process of the above formulation of the formulation of the formulation is: the mixed temperature of the slurry is 50 ° C, and TDI and DDI are added after 15 minutes after the oxidant AP is added, and then the process performance test results of the resulting propulsion phama will be given. table 5.

[0045] Table 5 Process performance test results of propellant formula

[0046] Hybrid process Time, H 1h 3h 5h test temperature 2# η / pa · 472.5 458.7 591.3 50℃

[0047] As can be seen from Table 5, the solid content of the propellant is as high as 87.5, and 0.06% highly active isocyanate curing agent TDI and the catalyst are mixed with DDI as a curing agent, mixed under 50 degrees, resulting The process of the propellant is very good, and the viscosity of the phama after 5 hours und...

Embodiment 3

[0053]A high estimate of process performance DDI-HTPB propellant, which is shown in Table 7.

[0054] Table 7 propellant formulation

[0055]

[0056] The main processing process of the formulation of the formulation of the above-mentioned formulation of the propellant is: the mixed temperature of the slurry is 50 ° C, and TDI and DDI are added after 12 minutes after the oxidant AP is added, and then the process performance test results of the resulting propulsion phama are obtained. Table 8.

[0057] Table 8 Process Performance Test Results of Propellant Formulation Phase

[0058] Hybrid process Time, H 1h 3h 5h test temperature 2# η / pa · 491.1 420.2 534.6 50℃

[0059] As can be seen from Table 8, the solid content of the propellant is as high as 86.5, and 0.23% highly active isocyanate curing agent TDI and the cure catalyst, the propellant formulation of DDI is a curing agent, mixed under 50 degrees, resulting The process of the propellant is ve...

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Abstract

The invention provides a technological-property-improved high-solid-content DDI-HTPB propellant. A small quantity of high-reaction-activity isocyanate curing agent and curing catalyst are added into ahydroxyl-terminated-polybutadiene propellant with DDI as a curing agent and with the solid content higher than 86%, and the mass percent content of the high-reaction-activity isocyanate curing agentis 0.06% to 0.25% of the hydroxyl-terminated-polybutadiene propellant. In the processing technology of the DDI-HTPB propellant, the adding time of the curing agent is shortened. According to the technological-property-improved high-solid-content DDI-HTPB propellant, under the condition that the mixing temperature cannot be increased, and the total mixing time is not prolonged, the technological property of the hydroxyl-terminated-polybutadiene propellant with the DDI as the curing agent is remarkably improved, the viscosity after propellant medicine pulp is subjected to thermal insulation for5 h at the temperature 50 DEG C is lower than 1,200 Pa s, and the requirement of medicine filling amplifying for the propellant technological property is met.

Description

Technical field [0001] The present invention generally relates to the field of rocket propellant, and in particular, there is a solid rocket engine mounted butyrox hydroxyl propellant formulation and a mixing process thereof. Background technique [0002] Delicate diisocyanate (DDI) is a biochemical product dimeric fatty acid as a starting material, and the end carboxyl group is converted to an isocyanate group, while a class isocyanate having no change occurs. The unique aliphatic isocyanate is used in the solid propellant with green, water resistance, the mechanical properties of the propellant, good aging performance, low combustion pressure index, is the development of two thrust propellants, solid pulses and large solids An important raw material for aerospace booster propellants. In addition, due to the biological renewability of DDI main raw material dimeric acid, low-carbon, green characteristics, with the development of oil resources, biotechnology and chemical synthesis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/06C06D5/06C06B23/00C06B21/00
CPCC06B21/0025C06B23/009C06B33/06C06B45/10C06D5/06
Inventor 庞爱民李爽贾方娜侯斌毛羽张晨孟嘉鑫
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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