China Ap/Htpb Propellant Bonding Agent 1, 1′-Isophthaloyl Bis (2-methylaziridine) /CAS. 7652-64-4 Hx-752, Find details about China CAS 7652-64-4, Leading Manufacturer of Bonding Agent 1 1′-Isop from Ap/Htpb Propellant Bonding Agent 1, 1′-Isophthaloyl Bis (2-methylaziridine) /CAS. 7652-64-4 Hx-752 - Yingkou Tanyun Chemical Research Institute Co, Ltd.
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A robust polyurethane liner is disclosed for solid propellant rocket motors which is insensitive to large variations in stoichiometry, exhibits increased cohesive strength and, when used in combination with a unique two coat (wet coat) liner process described below, modifies the ballistic properties of the adjacent interfacial propellant layer.
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Propellants in onboard rocket are burned in a controlled way (deflagration) to produce the desired thrust. A solid propellant consists of several chemical ingredients such as oxidizer, fuel, binder, plasticizer, curing agent, stabilizer, and cross-linking agent.
US5767221A US08/448,825 US44882595A US5767221A US 5767221 A US5767221 A US 5767221A US 44882595 A US44882595 A US 44882595A US 5767221 A US5767221 A US 5767221A Authority US Unite
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*NCO/OH ratio = 1.5-4.5 . The robust liner composition described above comprises the reaction product of a prepolymer binder which is terminated with hydroxyl or other functional groups which react with a isocyanate, a diisocyanate, polyisocyanate or oligomer of an isocyanate curing agent which will react with the binder to form a urethane or analogous linkage, a bonding agent, such as a ...
quality or activity of the product. If liquid HX-752 is allowed to stand at room temperature, it often crystallizes in a few days. HX-752 may be warmed to 45 °C (about 110°F) to melt the crystallites and lower the viscosity for easier handling. The safest way to avoid polymerization is to immerse the container in a water bath at 45 °C.
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White materials should be used for non-yellowing type PU adhesive, with non-yellow type curing agent. 3. The maintenance time of PU adhesive is short, and it must be pressurized when heated. 4. In the process of manua and assembly line work, it should avoid the direct blow of wet and cdd air. 5. AH solvent-based PU adhesive can be diluted by XC-03.
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The claimed invention is: 1. A solid rocket propellant polyurethane liner composition comprising: a polymeric binder having a plurality of reactive hydroxyl functional groups and a curing agent having a plurality of reactive isocyanate functional groups, wherein the quantity of binder and curing agent are selected such that the NCO/OH equivalents ratio is in the range from 1.5 to 4.5;
China Tanyun Tepanol Hx-878 Dynamar Cyanoethylated Polyamine Manufacturer/Hx-878 CAS. 68412-46-4 Propellant Htpb Linking Agent Hx-878, Find details about China Cyanoethylated Polyamine Manufacturer, CAS 68412-46-4 from Tanyun Tepanol Hx-878 Dynamar Cyanoethylated Polyamine Manufacturer/Hx-878 CAS. 68412-46-4 Propellant Htpb Linking Agent Hx-878 - Yingkou Tanyun Chemical Research Institute Co, Ltd.
The quantity of binder and curing agent is selected such that the NCO/OH ratio is in the range from 1.5 to 4.5. Diisocyanate curing agents are particularly useful. A bonding agent, such as a polyfunctional aziridine compound, is typically present in the liner composition in an amount ranging from about 3% to about 5%, by weight.
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