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Room temperature curing polyurethane bonding agent system for PBX (polymer bonded explosive) casting explosives

A room temperature curing, polyurethane technology, applied in the direction of explosives, etc., can solve the problems of easy sedimentation of solid components and high molding temperature, and achieve the effects of inhibiting solid phase sedimentation, reducing temperature requirements, and improving safety

Active Publication Date: 2017-06-20
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a room temperature curing polyurethane adhesive system for PBX pouring explosives in order to overcome the problems of high curing molding temperature of the existing HTPB pouring PBX explosives and long curing time at room temperature, and the solid components are easy to settle.

Method used

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  • Room temperature curing polyurethane bonding agent system for PBX (polymer bonded explosive) casting explosives
  • Room temperature curing polyurethane bonding agent system for PBX (polymer bonded explosive) casting explosives
  • Room temperature curing polyurethane bonding agent system for PBX (polymer bonded explosive) casting explosives

Examples

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Effect test

Embodiment 1

[0017] Example 1: A room-temperature-curing polyurethane adhesive system for PBX cast explosives, made of the following raw materials: 40 g of hydroxyl-terminated polybutadiene, 40 g of plasticizer isodecyl nonanoate IDP, 1,5-naphthalene Diisocyanate NDI 5g, stannous octoate TECH 0.25g, the construction period is 4h, suitable for pouring of large-sized powder columns.

[0018] The specific preparation method is: accurately weigh the hydroxyl-terminated polybutadiene and isodecyl nonanoate, add it to a dry beaker, and add the catalyst TECH at the same time; use a digital display electric mixer to stir at high speed for 5 minutes (1000rpm), and then add the curing agent 1 , 5-naphthalene diisocyanate, continue to stir for 1min, so that the components of the binder system are fully mixed, after the stirring is completed, put the beaker into a vacuum desiccator and vacuumize for 2min under the condition of a vacuum of 0.01MPa to remove air bubbles. After the components of the pour...

Embodiment 2

[0019] Embodiment 2: a kind of room temperature curing polyurethane adhesive system for PBX pouring explosives is made of the raw materials of following weight: 45g of hydroxyl-terminated polybutadiene, 50g of plasticizer butyl nitrate ethyl nitramine, terephthalate Isocyanate 7g, nano-ZnO0.35g,

[0020] The specific preparation method is as follows: accurately weigh the hydroxyl-terminated polybutadiene, butyl nitrate ethyl nitramine, add it to a dry beaker, and add the catalyst nano-ZnO at the same time; use a digital electric mixer to stir at high speed for 8 minutes (200rpm), Then add the curing agent p-phenylene diisocyanate and continue to stir for 2 minutes to fully mix the components of the binder system evenly. After the stirring is completed, put the beaker into a vacuum desiccator and evacuate for 5 minutes under the condition of a vacuum of 0.03MPa to remove air bubbles. After the components of the pouring explosives are fully mixed and uniform, pour them into shap...

Embodiment 3

[0021] Embodiment 3: a kind of room temperature curing polyurethane adhesive system for PBX pouring explosives is made of the following raw materials: 50g of hydroxyl-terminated polybutadiene, 60g of plasticizer isodecyl nonanoate, xylylene di Isocyanate 10g, DABCO 0.5g,

[0022] The specific preparation method is: accurately weigh the hydroxyl-terminated polybutadiene and isodecyl nonanoate, add it into a dry beaker, and add the catalyst DABCO; For dimethylene diisocyanate, continue to stir for 3 minutes to fully mix the components of the binder system evenly. After the stirring is completed, put the beaker into a vacuum desiccator and vacuumize for 1 minute at a vacuum degree of 0.05 MPa to remove air bubbles. After the components of the pouring explosives are fully mixed and uniform, pour them into shape at room temperature, and o Under the condition of curing temperature of C, the curing time is 5-7 days, and a good quality PBX cast explosive column is formed after curing...

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Abstract

The invention belongs to the technical field of casting explosives and solid propellants. In order to overcome the problems of the existing HTPB (hydroxyl-terminated polybutadiene) type PBX ((polymer bonded explosive)) casting explosive, including high curing forming temperature, long room temperature curing time, easy sedimentation of solid ingredients and the like, the invention provides a room temperature curing polyurethane bonding agent system for PBX casting explosives. The room temperature curing polyurethane bonding agent system for the PBX casting explosives is prepared from polyalcohol, plasticizing agents, polyisocyanates and curing catalysts according to a certain proportion. Good processing performance is realized; the viscosity is low in an early curing period; the viscosity increase is slow; bubbles can be favorably removed in a construction process; the system is suitable for charging process construction processes of PBX casting explosives in different dimensions; the system viscosity increase is obviously accelerated in a later curing period; the solid phase sedimentation problem of the PBX casting explosives in a curing and forming process can be inhibited to a certain degree; on the basis of meeting each construction index, the temperature requirements in the curing process are obviously reduced; the curing and forming under room temperature conditions can be achieved; the effects in aspects of improving the safety in the PBX casting explosive production process, the casting explosive column quality and the energy saving effect are obvious.

Description

technical field [0001] The invention belongs to the technical field of cast explosives and solid propellants, and in particular relates to a room-temperature-cured polyurethane adhesive system for PBX cast explosives. 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 cast PBX explosive with hydroxyl-terminated polybutadiene (HTPB)-isocyanate system as binder has good low fragility, slurry fluidity, long pot life, aging resistance stability, solid It has the characteristics of high phase content, good adhesion with metal, excellent explosive perform...

Claims

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Application Information

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IPC IPC(8): C08G18/69C08G18/76C08G18/79C08G18/77C06B45/10
CPCC06B45/10C08G18/69C08G18/7614C08G18/7678C08G18/776C08G18/794
Inventor 柴涛郭嘉昒刘玉存马慧袁俊明刘登程杨晓汾
Owner ZHONGBEI UNIV
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