Single-Base Propellant Plasticizer Replacement
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Solution Overview
Problem
Current single-base propelling powders for ammunition contain carcinogenic dinitrotoluene (DNT) and harmful dibutyl phthalate (DBP), necessitating a replacement that maintains workability and performance without increasing production costs.
Innovation Solution
A composition comprising nitrocellulose, dibutyl sebacate as an inert plasticizer, and ethyl centralite as a stabilizer, optionally with a flash-reducer component, which replaces DNT and DBP, ensuring gelatinization and stability while maintaining calorific value and ballistic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dinitrotoluene (DNT) and dibutyl phthalate (DBP) are used as plasticizers in single-base propelling powders, then workability and performance are maintained, but safety and environmental compliance deteriorate due to carcinogenic and harmful properties
Solution Approach 1:
The patent changes the chemical parameters by replacing DNT and DBP plasticizers with alternative substances that have different chemical properties but similar functional effects. The new plasticizers maintain the required workability and gelatinization properties while eliminating the harmful carcinogenic and fertility-damaging characteristics of the original substances, thus resolving the contradiction between safety compliance and manufacturing ease.
Solution Approach 2:
The patent adopts alternative plasticizer substances that are safer and environmentally compliant, treating the plasticizer selection as a replaceable component. By substituting harmful plasticizers with safer alternatives, the invention achieves compliance with safety regulations without compromising the workability required for production, effectively resolving the contradiction through material substitution.
2Reliability
If dinitrotoluene (DNT) and dibutyl phthalate (DBP) are replaced to meet safety regulations, then safety and environmental compliance improve, but workability and performance may deteriorate
Solution Approach 1:
The patent carefully adjusts the parameters of alternative plasticizers to match the functional performance of DNT and DBP. By selecting plasticizers with appropriate molecular weights, polarity, and gelatinization characteristics, the invention maintains consistent workability and performance while achieving safety and environmental compliance, thus resolving the contradiction between compliance improvement and manufacturing precision.
Solution Approach 2:
The patent ensures that the alternative plasticizers provide homogeneous mixing and consistent gelatinization properties similar to the original DNT and DBP formulations. This homogeneity in functional behavior across different batches and production conditions maintains manufacturing precision and performance consistency while eliminating harmful substances, resolving the contradiction between safety compliance and manufacturing precision.
3Reliability
If alternative plasticizers are used to replace DNT and DBP, then safety regulations are met, but production costs may increase
Solution Approach 1:
The patent optimizes the parameters of alternative plasticizers to achieve cost-effectiveness. By selecting substances that are readily available, have suitable performance characteristics, and require minimal process modifications, the invention reduces the cost increase associated with replacement, resolving the contradiction between safety compliance and production cost.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Dibutyl sebacate effectively replaces DNT and DBP, ensuring the composition's workability and performance are comparable to conventional single-base propelling powders, meeting safety regulations and production cost requirements.
Implementation Method 1
dibutyl sebacate, in the form of an inert plasticizer component
Implementation Method 2
ethyl centralite, in the form of a stabilizing component
Implementation Method 3
the capacity of the composition to be subject to a gelatinization process by which the nitrocellulose mass coagulates into a gelatinous state (gel)
Data Source
AI summary
The present invention relates to a composition for single-base propelling powder for ammunition consisting of nitrocellulose as an explosive base, an inert plasticizer component, at least one nitrocellulose stabilizer component, and optionally a flash-reducer component and traces of one or more solvents and water. The aforementioned inert plasticizing component is dibutyl sebacate (DBS). Preferably, the dibutyl sebacate is present with a content between 2% and 7% by weight.