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Compound catalyst binder system used for room-temperature curing of PBX cast explosive

A technology for compounding catalysts and curing catalysts, which is applied in the direction of non-explosive desensitizers/passivators, non-explosives/non-thermal agent components, explosives, etc., and can solve problems such as easy sedimentation of solid components and unsatisfactory mechanical properties of cured products. , to speed up the curing reaction rate, improve the mechanical properties of the charge, and improve the safety

Active Publication Date: 2017-07-14
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems of the existing HTPB type pouring PBX explosives with high curing molding temperature, long curing time at room temperature, solid components are easy to settle, and the mechanical properties of the cured products are not ideal, a compound catalyst adhesive for room temperature curing PBX pouring explosives is provided binder system

Method used

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  • Compound catalyst binder system used for room-temperature curing of PBX cast explosive

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Effect test

Embodiment 1

[0015] Embodiment 1: A compound catalyst binder system for curing PBX pouring explosives at room temperature, made of the raw materials of the following weight: polypolyol polyol hydroxyl-terminated polybutadiene that is HTPB is 40g; polyisocyanate 3.7g; curing catalyst TNB 2 0.065g, nano-ZnO 0.044g; wherein the polyisocyanate is isophorone diisocyanate IPDI.

[0016] The preparation method is: use an electronic balance to accurately weigh HTPB, add it to a dry beaker, and add a compound catalyst mixed with a curing catalyst and nano-ZnO at the same time, use a digital display electric mixer to stir at high speed for 8 minutes (200rpm), add a curing agent isofor Alone diisocyanate IPDI, continue to stir for 1min, so that the components of the binder system are fully mixed evenly, after the stirring is completed, put the beaker into a vacuum desiccator and evacuate for 5min under the condition of a vacuum of 0.01MPa to remove air bubbles. The binder system is prepared. Under t...

Embodiment 2

[0017] Embodiment 2: A compound catalyst binder system for curing PBX pouring explosives at room temperature, made of the raw materials of the following weight: polypolyol polyol hydroxyl-terminated polybutadiene, that is, HTPB is 40g; polyisocyanate 3.7g; curing catalyst TNB 2 0.109g, nano-ZnO 1.154g; wherein the polyisocyanate is isophorone diisocyanate IPDI.

[0018] The specific preparation method is: use an electronic balance to accurately weigh HTPB, add it to a dry beaker, and add the curing catalyst TNB at the same time 2 For the composite catalyst mixed with nano-ZnO, use a digital display electric mixer to stir at high speed for 5 minutes (500rpm), add the curing agent isophorone diisocyanate IPDI, and continue to stir for 2 minutes to fully mix the components of the binder system evenly. After completion, put the beaker into a vacuum desiccator and evacuate for 3 minutes under the condition of a vacuum degree of 0.03 MPa to remove air bubbles. The prepared binder s...

Embodiment 3

[0019] Embodiment 3: A compound catalyst binder system for curing PBX pouring explosives at room temperature, made of the raw materials of the following weight: polypolyol polyol hydroxyl-terminated polybutadiene, namely HTPB, is 40g; polyisocyanate 6.17g; curing catalyst TNB 2 0.346g, nano-ZnO 1.154g; wherein the polyisocyanate is HDI trimer.

[0020] The specific preparation method is to use an electronic balance to accurately weigh HTPB, add it to a dry beaker, and add the curing catalyst TNB at the same time 2 For the composite catalyst mixed with nano-ZnO, use a digital display electric mixer to stir at high speed for 2 minutes (1000rpm), add the curing agent isophorone diisocyanate IPDI, and continue to stir for 3 minutes to fully mix the components of the binder system evenly, and stir After completion, put the beaker into a vacuum desiccator and evacuate for 2 minutes under the condition of a vacuum degree of 0.05 MPa to remove air bubbles. The prepared binder system ...

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Abstract

The invention belongs to the technical fields of cast explosive and solid propellants. In order to overcome problems like high curing molding temperature, long room-temperature curing time and easy sedimentation of solid components of a conventional HTPB type cast PBX explosive, the invention provides a compound catalyst binder system used for room-temperature curing of a PBX cast explosive. The compound catalyst binder system is prepared from hydroxy-terminated polybutadiene, polyisocyanate, a curing catalyst and a catalyst namely nanometer zinc oxide according to a certain proportion, wherein the polyisocyanate is any one selected from the group consisting of IPDI, HMDI and an HDI trimer; and the curing catalyst is any one selected from the group consisting of TNB2, TPB and TEPB. According to the invention, the curing temperature of a propellant grain is reduced; the safety of the cast PBX explosive in the process of curing is improved; shrinkage stress is reduced and eliminated; the mechanical performance of propellant filling is improved; energy consumption and process cost are reduced; the pot life of a binder system is regulated through regulation of the usage amount of a catalyst, so different demands of construction are met, and the processibility of a propellant slurry is improved; the time of curing is effectively shortened; solids are prevented from sedimentation; meanwhile, cured products are improved in hardness, tensile strength, elongation at break, etc.

Description

technical field [0001] The invention belongs to the technical field of castable explosives and solid propellants, in particular to a composite catalyst binder system for room temperature curing PBX castable explosives, in order to realize the room temperature curing of PBX castable explosives and the improvement of the mechanical properties of cured products. Background technique [0002] Polymer Bonded Explosives (PBX) are explosives that bond various explosive components together with a polymer binder and then solidify to form a rubber-like mixture. PBX explosives reduce the risk of accidental explosion during storage, use and transportation. , has become a key area in the development of insensitive munitions (IM). The performance of the binder and the formulation of the PBX determine the performance of the explosive. [0003] The hydroxyl-terminated polybutadiene (HTPB)-isocyanate binder system has high solid phase content, long pot life, good fluidity, and good bonding ...

Claims

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Application Information

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IPC IPC(8): C08G18/79C08G18/75C08G18/69C08G18/22C06B23/00
CPCC06B23/005C08G18/225C08G18/227C08G18/69C08G18/755C08G18/758C08G18/792
Inventor 柴涛马慧刘玉存郭嘉昒杨晓汾刘登程袁俊明
Owner ZHONGBEI UNIV
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