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Method and product for improving process performance of tmxdi-htpb propellant

A technology of process performance and propellant, which is applied to the formulation of butylated hydroxy propellant for solid rocket motor charging and its mixing process, can solve the problems of poor process performance of HTPB propellant, and achieves early addition time, increased mixing temperature, and good performance. The effect of mechanical properties

Active Publication Date: 2020-09-01
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the problem of poor process performance of the HTPB propellant with TMXDI as the curing agent, and provides a method for improving the process performance of the TMXDI-HTPB propellant. By adding process additives, increasing the mixing temperature, and adding the curing agent in advance, the To achieve the purpose of improving the process performance of TMXDI-HTPB propellant without prolonging the total mixing time

Method used

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  • Method and product for improving process performance of tmxdi-htpb propellant
  • Method and product for improving process performance of tmxdi-htpb propellant
  • Method and product for improving process performance of tmxdi-htpb propellant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The formula (mass percentage) of propellant:

[0060] HTPB 7.30%, bonding agent MAPO 0.06%, TEA 0.04%, curing catalyst TPB 0.05%, process additive zinc octoate 0.03%, antioxidant H 0.12%, class I AP 25.0%, class III AP 35.0%, class IV AP 9.5 %, Al powder 18.5%, liquid burning rate catalyst T27 0.7%, DOS 3.2%, TMXDI 0.5%, of which the particle sizes of class I, class III and class IV AP are 332.5 μm, 133.9 μm and 7.2 μm respectively.

[0061] The conventional mixing process of propellant is:

[0062] Premix the HTPB, MAPO, TEA, H, T27, Al powder, TPB and DOS in the above weight ratio and put them into a VKM-5 5L vertical mixer without adding the process additive zinc octoate. During the mixing process Circulating hot water at 50°C for heat preservation, mix Class I, Class III, and Class IV APs evenly at a mass ratio of 25 / 35 / 9.5, and put them into the mixer twice within 20 minutes to mix with the aforementioned materials in the mixer , and then mix for another 30 minut...

Embodiment 2

[0072] The formula (mass percentage) of propellant:

[0073] HTPB 7.73%, bonding agent HX-752 0.08%, anti-aging agent Hs 0.12%, curing catalyst TPB 0.04%, process additive zinc isooctanoate 0.03%, class III AP 31.5%, class IV AP 36.0%, Al powder 17.0%, Fe 2 o 3 1.0%, liquid burning rate catalyst T27 3.0%, DOA 3.0%, TMXDI 0.5%, among which the particle sizes of Type III and Type IV APs are 133.9 μm and 3.4 μm respectively.

[0074] Ways to improve propellant process performance:

[0075] The above weight ratio of HTPB, HX-752, Hs, Fe 2 o 3 , Al powder, T27, DOA, TPB and process additive zinc isooctanoate are pre-mixed and put into VKM-5 type 5L vertical mixer. The AP is mixed evenly according to the mass ratio of 31.5 / 36, put into the mixer three times within 20 minutes to mix with the aforementioned materials in the mixer, and then mix for another 12 minutes to mix the materials, add the curing agent TMXDI and continue to mix for 55 minutes, Discharge. The process perfo...

Embodiment 3

[0083] The formula (mass percentage) of propellant:

[0084] HTPB 8.03%, bonding agent MAPO 0.06%, tetrahydroxyethylethylenediamine 0.03%, curing catalyst triethoxybismuth 0.03%, process additive zinc caprate 0.02%, antioxidant H 0.12%, class I AP42.0 %, Class III AP 21.0%, Class IV AP 7%, Al powder 18%, DOS 4.2%, TMXDI 0.5%, of which the particle sizes of Class I, Class III, and Class IV AP are 332.5 μm, 133.9 μm, and 7.2 μm, respectively.

[0085] Ways to improve propellant process performance:

[0086] Premix HTPB, MAPO, tetrahydroxyethylethylenediamine, H, Al powder, triethoxybismuth, DOS and process additive zinc decanoate in the above weight ratio and put them into VKM-5 5L stand Type mixer, put 60°C circulating hot water into the mixing process to keep warm, mix Class I, Class III, and Class IV AP evenly according to the mass ratio of 42 / 21 / 7, put it into the mixer twice within 22min and mix with it. The above-mentioned materials in the machine are mixed, and then mix...

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Abstract

The invention relates to a method for improving TMXDI-HTPB propellant process performance and a product. A process assistant ZnAR is added into the system, and the assistant accounts for 0.01%-0.2% ofthe mass percentage of an HTPB propellant. At the same time, the mixing temperature of the propellant slurry is raised, and the adding time of a curing agent is brought forward. Without adding the total mixing time, the method can significantly improve the process performance of the propellant with TMXDI as the curing agent and enhance the production efficiency, and the propellant has good mechanical properties, can meet the practical application needs, and lays the foundation for replacing the toxic curing agent TDI or IPDI with the low toxicity curing agent TMXDI.

Description

technical field [0001] The invention relates to the technical field of rocket propellants, in particular to a formulation of a butylated hydroxy propellant for solid rocket motor charge and a mixing process thereof. Background technique [0002] At present, domestic hydroxyl-terminated polybutadiene (commonly known as butyl hydroxy) propellants generally use toluene diisocyanate (TDI) and isophorone diisocyanate (IPDI) as curing agents. Among them, TDI is a highly toxic chemical with strong mucous membrane irritation and strong mutagenicity, while IPDI invades the body through the respiratory tract and skin, and its inhalation toxicity is highly toxic. Moreover, the TDI synthesis process involves heavily polluting nitration and phosgenation reactions, and a large amount of mixed acid and highly toxic phosgene are used in the preparation process, while the IPDI synthesis process uses highly toxic and deadly raw materials hydrogen cyanide and phosgene. Therefore, both TDI and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B23/00C06B33/06C06B33/02C06D5/06
CPCC06B23/00C06B33/02C06B33/06C06D5/06
Inventor 李爽贾方娜胡期伟侯斌刘学程迪高扬
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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