A one-dose two-purpose borate bonding agent, its synthesis method and application

By synthesizing a novel borate ester bonding agent, a five-membered ring structure is formed using specific raw materials and reactions. This solves the problems of insufficient mechanical properties and poor hydrolytic stability of traditional borate ester bonding agents in solid propellants, and achieves significant improvement in interfacial adhesion and enhanced mechanical properties.

CN119954845BActive Publication Date: 2026-05-01HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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Patent Information

Application Number
CN202510117092.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-24
Publication Date
2026-05-01
Estimated Expiration
2045-01-24

AI Technical Summary

Technical Problem

Existing borate ester bonding agents are generally ineffective in improving the mechanical properties of solid propellants, and have poor hydrolytic stability. Their traditional molecular structures weaken the bonding effect and are sensitive to moisture.

Method used

A novel borate ester bonding agent was synthesized through a three-step reaction using boric acid, n-butanol, pinacol, and bis(2-hydroxyethyl)amino (trihydroxymethyl) to form a five-membered ring structure. The molecule contains tertiary amine groups and multiple hydroxyl groups, which can form stable complexes with ammonium nitrate explosives and enter the cross-linking network.

Benefits of technology

It significantly improves the interfacial adhesion performance between ammonium nitrate explosives and solid propellant binders, enhances the mechanical properties of the propellant, is suitable for GAP and hydroxyl-butyl propellant formulations, and improves interfacial bond strength and hydrolytic stability.

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Abstract

The application relates to a one-dose two-purpose borate ester bonding agent, a synthesis method and application thereof. The new borate ester bonding agent is synthesized from boric acid, n-butanol, pinacol and bis(2-hydroxyethyl)amino(trihydroxymethyl) according to a certain proportion through a three-step reaction. The new borate ester bonding agent synthesized by the application can significantly improve the interfacial bonding performance of nitramine explosives (HMX, RDX, CL-20) and a solid propellant binder matrix. Since the structure contains a polyhydroxy structure, the new borate ester bonding agent can also enter a crosslinking network to play a crosslinking agent role, thereby greatly improving the mechanical properties of the solid propellant. The new borate ester bonding agent is suitable for GAP propellant formulations and also suitable for hydroxyl-terminated propellant formulations. The application provides a new borate ester bonding agent design idea. The bonding agent synthesis method is simple and stable, the synthesis raw materials are widely sourced, the quality is easy to enlarge and control, and the mechanical properties of the polyether propellant can be significantly improved.
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