Poly (2-methyl-2-nitropropylene glycol adipate) as well as preparation method and application thereof
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of nitropropylene glycol ester and nitropropylene glycol, which is applied in the field of energetic materials, can solve the problems of low energy level and low energy level of inert polyester desensitizers, and achieve the effect of improving ballistic performance and good migration resistance
Active Publication Date: 2019-11-22
XIAN MODERN CHEM RES INST
View PDF5 Cites 1 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0004] The technical problem to be solved in the present invention is to provide a macromolecular desensitizer with higher energy and better migration resistance and its preparation method for the shortcomings of the existing inert polyester desensitizers with low energy levels
[0005] The idea of the present invention is based on the good migration resistance of polyester compounds with side chain structures, using energetic compounds as polymerized monomers, introducing energetic groups into the side chains of macromolecular desensitizing agents to replace the original inert group, to solve the problem of low energy level of inert polyester desensitizer, which not only has better anti-migration effect when used in propellants, but also can improve the detonation heat and projectile initial velocity
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0017] Adipic acid (146g, 1mol) and 2-methyl-2-nitropropanediol (148.5g, 1.1mol) were added to 300mL of toluene, then 3g of p-toluenesulfonic acid was added, the temperature was raised to reflux of toluene, and the ester Condensation reaction, reaction 8h. After the reaction, the temperature was lowered to below 30° C., the reaction solution was washed with water, and the toluene was evaporated under reduced pressure to obtain 274.3 g of poly-2-methyl-2-nitropropanediol adipate with a yield of 99.2%.
[0019] Properties: Appearance is yellow-brown solid; number average molecular weight 2972; molecular weight distribution 1.6324.
Embodiment 2
[0021] Add adipic acid (146g, 1mol) and 2-methyl-2-nitropropanediol (135g, 1mol) into 300mL of toluene, then add 3g of p-toluenesulfonic acid, heat up to toluene reflux, and carry out esterification condensation Reaction, reaction 6h. After the reaction, the temperature was lowered to below 30° C., the reaction liquid was washed with water, and the toluene was evaporated under reduced pressure to obtain 273.4 g of poly-2-methyl-2-nitropropanediol adipate with a yield of 98.9%.
Embodiment 3
[0023] Add adipic acid (146g, 1mol) and 2-methyl-2-nitropropanediol (121.5g, 0.9mol) into 300mL of toluene, then add 3g of p-toluenesulfonic acid, heat up to toluene reflux, and carry out esterification Condensation reaction, reaction 5h. After the reaction, the temperature was lowered to below 30° C., the reaction solution was washed with water, and the toluene was evaporated under reduced pressure to obtain 271.9 g of poly-2-methyl-2-nitropropanediol adipate with a yield of 98.3%.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
diffusion coefficient
aaaaa
aaaaa
diffusion coefficient
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses an energetic insensitive agent-containing poly (2-methyl-2-nitropropanediol adipate) for emission medicine as well as a preparation method and application of the energetic insensitive agent-containing poly (2-methyl-2-nitropropanediol adipate). The structural formula of the poly (2-methyl-2-nitropropanediol adipate) is shown in the specification, wherein n is greater than or equal to 2 and less than or equal to 20 and is an integer. The preparation method takes adipic acid and 2-methyl-2-nitropropylene glycol as raw materials, and comprises the following steps: adding adipic acid and 2-methyl-2-nitropropylene glycol into toluene, then adding a catalyst, heating until toluene flows back, and carrying out an esterification condensation reaction, after the reaction isfinished, cooling to below 30 DEG C, washing the reaction solution with water, and carrying out reduced pressure distillation to remove toluene, thereby obtaining the poly (2-methyl-2-nitropropylene glycol adipate). The poly (2-methyl-2-nitropropanediol adipate) synthesized by the method is applied as a desensitizer in propellant powder, the migration resistance is better, and the explosion heat and the projectile initial velocity are higher than those of an inert desensitizer.
Description
technical field [0001] The invention belongs to the technical field of energetic materials, and in particular relates to an energetic insensitivity agent poly(2-methyl-2-nitropropanediol adipate) for propellant and its preparation method and application. Background technique [0002] Desensitizer is an important functional component of propellant, its function is to penetrate into the surface of propellant to form a thin layer of slow-burning substance, so as to reduce the gas generation rate at the initial stage of combustion, and when the slow-burning layer is gradually burned away, the gas generation rate gradually increases. Large, forming a progressive combustion. [0003] The currently commonly used desensitizers are camphor, dinitrotoluene (DNT), methyl neutralizing agent (C2), ethyl neutralizing agent (C1), dibutyl phthalate (DBP), phthalic acid Small molecular compounds such as diphenyl ester (DPP) have small molecular weight and strong diffusion and mobility. The ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more