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Tri-functionality PNIMMO energy-containing adhesive and synthesis method thereof

A technology of trifunctionality and synthesis method, applied in the direction of explosives, etc., can solve the problems of not easy to stir evenly, high viscosity of the system, etc., and achieve the effects of wide range of curing agents, reduced viscosity, and shortened curing time.

Inactive Publication Date: 2018-09-28
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the synthesized bifunctional PNIMMO needs to be cured with toluene diisocyanate (TDI) and a crosslinking agent must be added at the same time; if the trifunctional isocyanate (N-100) is used for curing, the viscosity of the system is very high, and it is not easy to stir evenly

Method used

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  • Tri-functionality PNIMMO energy-containing adhesive and synthesis method thereof
  • Tri-functionality PNIMMO energy-containing adhesive and synthesis method thereof
  • Tri-functionality PNIMMO energy-containing adhesive and synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] In a 100mL four-neck round bottom flask equipped with mechanical stirring, reflux condenser, thermometer, and dropping funnel, add 20mL of dichloromethane, 1.3g (10mmol) of trimethylolpropane (TMP) and 1.4g of trifluorinated For the boron ether complex, after stirring for 30 minutes at a temperature of 20°C to 30°C, 22g (150mmol) of 3-nitratemethyl-3-methyloxetane (NIMMO) was added dropwise, and the dropwise addition time For 2h, continue to react for 24h after the dropwise addition, use Na 2 CO 3 The aqueous solution was neutralized, the organic phase was washed with water until neutral, and the solvent was distilled off under reduced pressure to obtain 22 g of light yellow viscous liquid.

[0024] Structure Identification:

[0025] IR, ν max (cm -1 ): 3444 (-OH), 1112 (fatty ether C-O-C), 1630, 1281, 870 (-ONO 2 ).

[0026] 1 H NMR (CDCl 3 ,500MHz): δ5.31(s,1H),4.31~4.49(m,2H),3.25~3.37(m,4H),2.37(m,3H); 13 C NMR (CDCl 3 ,125MHz): δ75.84, 74.93, 73.77, 71.51...

Embodiment 2

[0030] In a 100mL four-neck round bottom flask equipped with mechanical stirring, reflux condenser, thermometer, and dropping funnel, add 20mL of dichloromethane, 1.3g (10mmol) of trimethylolpropane (TMP) and 1.4g of trifluorinated For the boron ether complex, after stirring for 30 minutes at a temperature of 20°C to 30°C, 33g (225mmol) of 3-nitratemethyl-3-methyloxetane (NIMMO) was added dropwise, and the dropwise addition time For 3h, continue to react for 24h after the dropwise addition, use Na 2 CO 3 The aqueous solution was neutralized, the organic phase was washed with water until neutral, and the solvent was distilled off under reduced pressure to obtain 33 g of light yellow viscous liquid.

Embodiment 3

[0032] In a 100mL four-neck round bottom flask equipped with mechanical stirring, reflux condenser, thermometer, and dropping funnel, add 20mL of dichloromethane, 1.3g (10mmol) of trimethylolpropane (TMP) and 1.4g of trifluorinated For the boron etherate complex, after stirring for 30 minutes at a temperature of 20°C to 30°C, 44g (300mmol) of 3-nitratemethyl-3-methyloxetane (NIMMO) was added dropwise, and the dropwise addition time For 4h, continue to react for 24h after the dropwise addition, use Na 2 CO 3 The aqueous solution was neutralized, the organic phase was washed with water until neutral, and the solvent was distilled off under reduced pressure to obtain 44 g of light yellow viscous liquid.

[0033] The application properties of the trifunctionality PNIMMO energetic adhesive of the present invention:

[0034] 1) The curing time of the available diisocyanate curing agent

[0035] The trifunctional PNIMMO energetic adhesive prepared by the present invention is respe...

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Abstract

The invention discloses a tri-functionality PNIMMO energy-containing adhesive and a synthesis method thereof. The structural formula of the tri-functionality PNIMMO energy-containing adhesive is as shown in a formula (I). The synthesis method comprises the following steps: taking trimethylolpropane (TMP) as an initiator, and 3-nitrate methyl-3-trimethylene oxide (NIMMO) as a monomer, and performing cationic ring-opening polymerization reaction, so as to obtain the tri-functionality PNIMMO energy-containing adhesive. The adhesive can be directly obtained by curing two-functionality isocyanate,and a cross-linking agent is not required to be added. The adhesive is applied to compound solid propellants. In a formula as shown in the description, m is an integer ranging from 5 to 10.

Description

technical field [0001] The invention relates to a trifunctional PNIMMO energetic adhesive, belonging to the field of solid propellants. Background technique [0002] Two-functionality PNIMMO is obtained by initiating the polymerization of 3-nitratemethyl-3-methyloxetane (NIMMO) under the action of 1,4-butanediol and boron trifluoride·diethyl ether complex. The polymerization provides protons to the NIMMO monomer through the initiator boron trifluoride ether complex, and then the protonated NIMMO monomer reacts with other monomers to achieve chain growth, and finally the long chain of the polymer undergoes a chain termination reaction with water to form Hydroxyl-terminated PNIMMO. Because 1,4-butanediol is used as co-initiator, the prepared PNIMMO has only two functionalities. [0003] Currently, toluene diisocyanate (TDI) is used to cure the synthesized bifunctional PNIMMO, and a crosslinking agent needs to be added at the same time; if trifunctional isocyanate (N-100) is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/48C06B45/10
CPCC06B45/10C08G18/48C08G65/2609
Inventor 王晓川莫洪昌舒远杰卢先明刘宁徐明辉张倩汪伟
Owner XIAN MODERN CHEM RES INST
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