Combustion-restricted layer material applied to NEPE (Nitrate Ester Plasticized Polyether) propellant and preparation method of combustion-restricted layer material
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A layer material, propellant technology, applied in the direction of adhesive, adhesive type, adhesive additive, etc., to achieve the effect of strong environmental adaptability, stable performance and good producibility
Active Publication Date: 2015-01-14
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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Problems solved by technology
Corresponding to the flame-limited layer used in NEPE high-energy propellants, there are no published literature reports at home and abroad
Method used
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Embodiment 1
[0030] Embodiment 1 preparation process is as follows:
[0031] Add 6 grams of Is210 and 2 grams of MAPO to 51 grams of HTPB, add 12 grams of TiO after mixing for 5 minutes 2 , 5 grams of Cr 2 o 3 , 5 grams of SiO 2 , 1 gram of Fang-H, 2 grams of MNA, and 2 grams of 2-NDPA, mixed for 5 minutes, then added 7.6 grams of TDI and 6 grams of TTD, mixed for 10 minutes, then added 0.4 grams of SnO, mixed for 5 minutes, and discharged for use.
Embodiment 2
[0032] Embodiment 2 preparation process is as follows:
[0033] Add 4 grams of Is210 and 2 grams of MAPO to 62 grams of HTPB, add 10 grams of TiO after mixing for 5 minutes 2 , 5 grams of ZnO, 2 grams of MNA, and 2 grams of 2-NDPA, mixed for 5 minutes, then added 6 grams of TDI, 3 grams of N-100 and 3 grams of TTD, mixed for 10 minutes, then added 1 gram of DBTDL, mixed for 5 minutes, and the Materials are ready for use.
Embodiment 3
[0034] Embodiment 3 preparation process is as follows:
[0035] Add 10 grams of N330 to 51 grams of HTPB, add 5 grams of Is210, 1 gram of TEA and 2 grams of MAPO after mixing for 3 minutes, add 5 grams of TiO after mixing for 5 minutes 2 , 5 grams of ZnO, 5 grams of SiO 2 , 0.5 grams of anti-H, 2 grams of MNA, and 1.5 grams of 2-NDPA, mixed for 5 minutes, then added 8.4 grams of TDI, 3 grams of N-100, mixed for 10 minutes, then added 0.3 grams of SnO and 0.3 grams of CoN, mixed 5min, discharge and set aside.
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Abstract
The invention discloses a combustion-restricted layer formula applied to an NEPE (Nitrate Ester Plasticized Polyether) propellant. The combustion-restricted layer formula comprises the following components in percentage by mass: 51-74 percent of adhesive, 9-12 percent of a curing agent, 8-22 percent of reinforcing filler, 3-5 percent of an anti-aging agent, 5-8 percent of a network regulator and 1-2 percent of a curing catalyst, wherein the adhesive refers to a hydroxyl-terminated polymer; the curing agent refers to an isocyanate compound; the reinforcing filler refers to an inorganic compound; the anti-aging agent refers to an aromatic compound; the network regulator refers to a compound which contains at least two functional groups; and the curing catalyst refers to an organic metal compound. The combustion-restricted layer formula disclosed by the invention has the characteristics of good processing property, room temperature curing property, adjustable curing time and excellent overall performance and is applied to end face cladding of a high-energy propellant engine.
Description
technical field [0001] The invention relates to a flame-limiting layer material suitable for NEPE high-energy propellants and a preparation process thereof. Background technique [0002] The flame-limiting layer is a layer of fire-resistant material formed on a certain part of the surface of the grain after the propellant is solidified. Internal Ballistic Performance. With the wide application of NEPE high-energy propellant in strategic and tactical solid rocket motors, the development of its matching combustion-limited layer formula is becoming increasingly urgent. Good adhesion and process performance, adjustable curing speed at room temperature, and good anti-nitrate migration performance are the keys to the development of the formulation of the high-energy propellant flame-limiting layer. Regarding the flame-limiting layer used in NEPE high-energy propellants, there are no published literature reports at home and abroad. Contents of the invention [0003] The object...
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