CN115216216A - Integrated material for spraying thermal insulation/lining layer on solid engine grain and forming method - Google Patents
Integrated material for spraying thermal insulation/lining layer on solid engine grain and forming method Download PDFInfo
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- CN115216216A CN115216216A CN202210871357.1A CN202210871357A CN115216216A CN 115216216 A CN115216216 A CN 115216216A CN 202210871357 A CN202210871357 A CN 202210871357A CN 115216216 A CN115216216 A CN 115216216A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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Abstract
The invention discloses an integrated material for spraying a heat insulation/lining layer on a solid engine grain and a forming method thereof, wherein the integrated material comprises matrix resin, fibrous filler, ablation-resistant resin, a flame retardant and other auxiliary agents, the forming method adopts a solvent-free spraying process, spraying a spraying slurry on the outer surface of a propellant grain directly, filling the propellant grain into an engine shell after the heat insulation/lining layer material gels for 10 to 30min, and heating and curing at the temperature of 30 to 50 ℃ for 24 to 72h to realize the integrated forming of the heat insulation lining layer of the engine grain. The invention solves the problems of low manufacturing efficiency, large environmental pollution, high cost, debonding of the rubber heat insulation layer and the butyl hydroxyl lining layer interface and the like in the processes of compression molding of the butyronitrile and ethylene propylene diene monomer rubber-based heat insulation material and spraying of the butyl hydroxyl lining layer solvent, realizes quick, batch and low-cost manufacturing of the heat insulation layer and the lining layer, and provides a new solution for manufacturing of a filling type solid engine.
Description
Technical Field
The invention relates to the technical field of solid engine heat insulation and ablation resistance materials, in particular to an integrated material for spraying a heat insulation/lining layer on a solid engine grain and a forming method.
Background
The solid rocket engine is a propulsion power device for flying missiles, rocket projectiles and the like, has the characteristics of simple structure, superior performance, good maneuverability, low cost, easy maintenance and the like, and is widely applied to military, aerospace and national economy construction. In the free-filling solid rocket engine, the heat insulating layer of the engine is mainly manufactured by a manual paster process, and the lining is adhered to the propellant grain by methods such as brushing and the like, so that the change of the charging combustion surface is controlled. The existing solid engine field adopts rubber-based heat-insulating material manual pasting and hydroxyl liner spraying processes, which have the problems of material mechanical and chemical property difference at two sides of a bonding interface, easy generation of bulge type, layer gap type, close type and spot type bonding defects, weak link of propellant/heat insulation and heat insulation/liner interface, interface debonding failure under the condition of complex load, intermittent process of the manufacturing method, incapability of realizing continuous production and manufacturing, long production period, high cost and the like.
The spraying technology has the characteristics of uniform thickness, good quality consistency, high reliability and the like of the formed coating, and has outstanding advantages in the aspects of quality consistency and reliability of formed products. The spray forming technology is applied to the field of solid engine heat insulation coating materials, the using amount and the proportion of the auxiliary agent in the spray slurry are optimized, the requirement on the performance of the heat insulation layer and the lining layer material is met, the integrated spraying manufacture of the engine propellant grain heat insulation/lining layer material is realized, the production efficiency is improved, the manufacturing cost of the engine is reduced, the manual operation influence is reduced, and the thickness of the heat insulation layer and the lining layer of the engine is accurately regulated and controlled.
Disclosure of Invention
The invention aims to solve the technical problem of providing an integrated material for spraying a thermal insulation/lining layer on a solid engine grain so as to solve the problems of easy debonding and low production efficiency of the interface between the traditional rubber-based thermal insulation material and a hydroxyl liner layer; meanwhile, a forming method of the solid engine grain spraying heat insulation/lining layer integrated material is provided, so that the problem of integrated manufacturing and forming of the propellant grain heat insulation/lining layer is solved.
In order to solve the existing technical problems, the technical scheme adopted by the invention is as follows: the solid engine grain spraying heat insulation/lining layer integrated material consists of matrix resin, fiber filler, ablation resistant resin and a flame retardant, and comprises the following components in parts by mass:
further, the matrix resin according to the present invention is preferably one or more of a polyurethane resin, a polyurethaneurea resin, or a polyurea resin.
Further, the base resin of the present invention is composed of a component A and a component B, wherein the component A is preferably one or two of diphenylmethane diisocyanate (MDI) prepolymer or Naphthalene Diisocyanate (NDI) prepolymer; the component B is preferably one or more of polyoxypropylene glycol PPG-400, polytetrahydrofuran polyol PTG-1000 or primary amino polyoxypropylene T-3000.
Further, the matrix resin comprises the following components in parts by mass:
100 to 110 portions of A component
And the component B is 80 to 100.
Further, the fiber filler of the present invention is preferably one or two of basalt fiber and polyimide fiber.
Further, the ablation-resistant resin is preferably one or more of phenolic resin, polyimide resin and furfural resin.
Further, the flame retardant of the present invention is preferably one or more of magnesium hydroxide, pentaerythritol phosphate, and piperazine pyrophosphate.
Further, the invention also discloses a forming method of the solid engine grain spray heat insulation/lining layer integrated material, which comprises the following specific steps:
s1, adding a fiber filler into a component A of matrix resin according to the mixture ratio of the components, adding an ablation-resistant resin and a flame retardant into a component B of the matrix resin, and respectively stirring and uniformly mixing to obtain spraying slurry A and spraying slurry B;
s2, respectively placing the uniformly mixed spraying slurry A and the spraying slurry B in a charging basket of a spraying device, placing a spray gun on a movable walking module of the spraying device, and placing the explosive columns on an automatic explosive column rotary table in the spraying device;
s3, setting the spraying temperature and the spraying pressure of the spraying slurry, selecting the diameter of a spray gun nozzle, setting the up-and-down moving speed of the spray gun on the movable walking module, the rotating speed of the automatic explosive column turntable and the distance between the movable walking module and the automatic explosive column turntable, synchronously starting the spray gun and the automatic explosive column turntable, and spraying the spraying slurry on the surface of the explosive column;
and S4, after spraying is finished, filling the powder into the engine shell to finish a powder charging process, and heating and curing to realize the integrated manufacturing of the powder column spraying heat insulation/lining layer of the solid engine.
Further, the stirring and mixing temperature of the spraying slurry is preferably 60 to 80 ℃.
Further, the slurry spraying pressure is preferably 1500-2500 psi, the spraying temperature is preferably 50-80 ℃, and the diameter of the spray gun nozzle is preferably 0.7-1.3 mm.
Further, the distance between the movable walking module and the automatic powder column rotary table is preferably 1.0-3.0 m, the automatic walking speed of the spray gun on the movable walking module is preferably 30-200 mm/s, and the rotating speed of the automatic powder column rotary table is preferably 10-60 r/min.
Furthermore, the curing temperature of the solid engine grain spray heat insulation/lining layer integrated material is preferably 30-50 ℃, and the curing time is preferably 24-72 hours.
According to the integrated forming method of the grain heat insulation/lining layer, the material has the functions of the heat insulation layer and the lining layer, the interface of the inner layer of the engine can be reduced, the forming process of the heat insulation lining layer is simplified, and the probability of interface debonding is reduced; the heat insulation/lining layer integrated spraying manufacturing technology can effectively solve the problems of low forming efficiency, more manual work, high forming precision control difficulty, influence on the health of operators due to solvent volatilization and the like existing in the manual sticking and hydroxyl lining layer spraying process of the rubber heat insulation layer.
Advantageous effects
The integrated material body of the heat insulation/lining layer has excellent mechanical property, simultaneously meets the performance requirements of the heat insulation layer and the lining layer material of an engine, adopts one material as the heat insulation layer and the lining layer, solves the defects of interface bulge, gaps, weak adhesion and the like caused by the difference of mechanical and chemical properties of different materials of the traditional rubber base and lining layer materials, and avoids potential safety hazards caused by the problems of insecure interface adhesion and the like in a solid engine.
The integrated manufacturing method of the heat insulation/lining layer adopts the spray forming process, and the process has the advantages of stable and uniform material spraying amount, high forming size precision and high automation degree, can greatly reduce the production cost and improve the quality stability and reliability of the heat insulation layer. On the other hand, the heat insulation/lining layer material is directly formed on the outer surface of the grain, the forming method is simple and easy to operate, the design and the forming of the gradient heat insulation structure of the heat insulation layer and the lining layer material of the solid engine are easily met, and the function/the structure of the heat insulation/material can be manufactured according to the requirement.
The integrated material of the heat insulation/lining layer is formed by solvent-free spraying, wherein the research on the related process performance is more important, and the related experimental research has higher difficulty and innovation. The continuous spraying operation of the heat insulation liner material is realized by regulating and controlling parameters such as the diameter of a nozzle, spraying pressure, temperature and the like in the spraying process; the relevance of the rotating speed of the explosive column rotary table, the up-and-down moving distance of a spray gun on the module, spraying process parameters and the like is explored, and the high-precision forming of the engine explosive column heat insulation/lining layer is realized.
Drawings
FIG. 1 is a schematic diagram of an integrated molding equipment for a heat-insulating/lining material of a charge column of a solid engine, in which a 1-spray gun moving and traveling module, a 2-charge column automatic rotating platform and a 3-baffle are arranged.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.
Table 1 shows the formulation ratios of the insulation/lining materials in different embodiments.
TABLE 1 formulation component ratios of the insulation/backing layer materials of examples 1-4
Example 1: adding the auxiliary agents into the spray resin according to the formula component ratio of the spray heat insulation/lining layer material, mixing the materials by using a pneumatic stirring paddle at the mixing temperature of 60 ℃, placing the mixed materials into a charging barrel of spray equipment, setting the spray pressure to be 2400psi, the spray temperature to be 80 ℃ and the diameter of a spray gun nozzle to be 1.3mm; the spray gun is arranged on an upper walking module and a lower walking module of the spray coating device, the powder column is arranged on an automatic rotary table of the spray coating device, the walking speed of the spray gun on the modules is set to be 50mm/s, the rotating speed of the rotary table is set to be 20r/min, the distance between the spray gun and the automatic rotary table is set to be 2.6m, the spray gun and the automatic rotary table are synchronously opened, and slurry is sprayed on the surface of the powder column. After the spray coating of the grain heat insulation/lining material is finished, the grain heat insulation/lining material is primarily cured and then filled in an engine shell, and the engine shell is placed in a drying room with the temperature of 40 ℃ and the curing time is 48h.
Example 2: adding the auxiliary agents into the spraying resin according to the formula and the component ratio of the spraying heat insulation/lining layer material, mixing the materials by using a pneumatic stirring paddle, wherein the mixing temperature is 80 ℃, placing the mixed materials into a charging barrel of spraying equipment, setting the spraying pressure to be 1900psi, the spraying temperature to be 50 ℃, and the diameter of a spray gun nozzle to be 0.7mm; the spray gun is arranged on an upper walking module and a lower walking module of the spray coating device, the powder column is arranged on an automatic rotary table of the spray coating device, the walking speed of the spray gun on the modules is set to be 90mm/s, the rotating speed of the rotary table is set to be 30r/min, the distance between the spray gun and the automatic rotary table is set to be 1.7m, the spray gun and the automatic rotary table are synchronously opened, and slurry is sprayed on the surface of the powder column. After the spray coating of the powder column heat insulation/lining layer material is finished, the powder column heat insulation/lining layer material is primarily cured and then is filled in an engine shell, and the engine shell is placed in a drying room with the temperature of 50 ℃, and the curing time is 24 hours.
Example 3: adding the auxiliary agents into the spraying resin according to the formula and the component ratio of the spraying heat insulation/lining layer material, mixing the materials by using a pneumatic stirring paddle, wherein the mixing temperature is 60 ℃, placing the mixed materials into a charging barrel of spraying equipment, setting the spraying pressure to be 1600psi, the spraying temperature to be 70 ℃, and the diameter of a spray gun nozzle to be 1.0mm; the spray gun is arranged on an upper walking module and a lower walking module of the spray column spraying device, the spray column is arranged on an automatic rotary table of the spray column spraying device, the walking speed of the spray gun on the modules is set to be 190mm/s, the rotating speed of the rotary table is 55r/min, the distance between the spray gun and the automatic rotary table is 1.2m, the spray gun and the automatic rotary table are synchronously opened, and slurry is sprayed on the surface of the spray column. After the spray coating of the grain heat insulation/lining material is finished, the grain heat insulation/lining material is primarily cured and then filled in an engine shell, and the engine shell is placed in a drying room with the temperature of 50 ℃ and the curing time is 24 hours.
Example 4: adding the auxiliary agents into the spraying resin component according to the formula and the proportion of the spraying heat insulation/lining layer material, mixing the materials by using a pneumatic stirring paddle, wherein the mixing temperature is 70 ℃, placing the mixed component materials into a charging barrel of spraying equipment, setting the spraying pressure to 2200psi, the spraying temperature to 60 ℃, and the diameter of a spray gun nozzle to be 0.9mm; the spray gun is arranged on an upper walking module and a lower walking module of the spray coating device, the powder column is arranged on an automatic rotary table of the spray coating device, the walking speed of the spray gun on the modules is set to be 130mm/s, the rotating speed of the rotary table is set to be 40r/min, the distance between the spray gun and the automatic rotary table is set to be 2.1m, the spray gun and the automatic rotary table are synchronously opened, and slurry is sprayed on the surface of the powder column. After the spray coating of the grain heat insulation/lining material is finished, the grain heat insulation/lining material is primarily cured and then filled in an engine shell, and the grain heat insulation/lining material is placed in a drying room with the temperature of 30 ℃ and the curing time is 72 hours.
Examples 1-4 spray insulation/backing layer materials the performance test results are shown in table 2.
Table 2 examples 1-4 test results of thermal insulation/lining layer material spraying performance
Examples 1-4 spray heat insulation/lining layer integrated molding performance the heat insulation/lining layer dimensions, thickness and quality and appearance at different positions of the charge column were tested, wherein the sampling positions were four positions, i.e., the top of the charge column end enclosure (position (1)), and the upper, middle and lower straight sections ((2), (3), (4)), and the test results are shown in table 3.
Table 3 examples 1-4 spray thermal insulation/underlayment dimensional thickness and quality appearance test results
Claims (12)
1. The solid engine grain spraying heat insulation/lining layer integrated material consists of matrix resin, fiber filler, ablation resistant resin and a flame retardant, and comprises the following components in parts by mass:
2. the integrated material of claim 1, wherein: the matrix resin is one or more of polyurethane resin, polyurethane urea resin or polyurea resin.
3. The integrated material according to claim 1 or 2, characterized in that: the base resin consists of a component A and a component B, wherein the component A is one or two of diphenylmethane diisocyanate (MDI) prepolymer or Naphthalene Diisocyanate (NDI) prepolymer; the component B is one or more of polyoxypropylene glycol PPG-400, polytetrahydrofuran polyalcohol PTG-1000 or primary amino polyoxypropylene T-3000.
4. The integrated material of claim 3, wherein: the matrix resin comprises a component A and a component B which are mixed in parts by mass,
100 to 110 portions of A component
And the component B is 80 to 100.
5. The integrated material of claim 1, wherein: the fiber filler is one or two of basalt fiber or polyimide fiber.
6. The integrated material of claim 1, wherein: the ablation-resistant resin is one or more of phenolic resin, polyimide resin or furfural resin.
7. The integrated material of claim 1, wherein: the flame retardant is one or more of magnesium hydroxide, pentaerythritol phosphate or piperazine pyrophosphate.
8. The molding method of the integrated material according to any one of claims 1 to 7, comprising the following specific steps:
s1, adding a fiber filler into the component A of matrix resin according to the component ratio, adding an ablation-resistant resin and a flame retardant into the component B of the matrix resin, and respectively stirring and uniformly mixing to obtain spraying slurry A and spraying slurry B;
s2, respectively placing the uniformly mixed spraying slurry A and the spraying slurry B in a charging basket of a spraying device, placing a spray gun on a movable travelling module of the spraying device, and placing the explosive columns on an automatic explosive column rotary table in the spraying device;
s3, setting the spraying temperature and the spraying pressure of the spraying slurry, selecting the diameter of a spray gun nozzle, setting the up-and-down moving speed of the spray gun on the movable walking module, the rotating speed of the automatic explosive column rotary table and the distance between the movable walking module and the automatic explosive column rotary table, synchronously starting the spray gun and the automatic explosive column rotary table, and spraying the spraying slurry on the surface of the explosive column;
and S4, after spraying, filling the powder into the engine shell to complete a powder charging process, and heating and curing to realize the integrated manufacturing of the solid engine powder column spraying heat insulation/lining layer.
9. The molding method according to claim 8, wherein: the stirring and mixing temperature of the spraying slurry is 60-80 ℃.
10. The molding method according to claim 8, wherein: the spraying pressure of the slurry is 1500-2500 psi, the spraying temperature is 50-80 ℃, and the diameter of the spray gun nozzle is 0.7-1.3 mm.
11. The molding method according to claim 8, wherein: the distance between the movable walking module and the automatic powder column turntable is 1.0-3.0 m, the automatic walking speed of the spray gun on the movable walking module is 30-200 mm/s, and the rotating speed of the automatic powder column turntable is 10-60 r/min.
12. The molding method according to claim 8, wherein: the curing temperature of the solid engine grain spray heat insulation/lining layer integrated material is 30-50 ℃, and the curing time is 24-72 hours.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4543366A (en) * | 1984-09-10 | 1985-09-24 | Thermocell Development, Ltd. | Sprayable urethane resin composition and method |
| JPH0255862A (en) * | 1988-08-12 | 1990-02-26 | Morton Thiokol Inc | Manufacture of rocket motor and rocket motor liner composition |
| US4956397A (en) * | 1989-07-17 | 1990-09-11 | The United States Of America As Represented By The Secretary Of The Air Force | Insulating liner for solid rocket motor containing vulcanizable elastomer and a bond promoter which is a novolac epoxy or a resole treated cellulose |
| CN105855145A (en) * | 2016-04-01 | 2016-08-17 | 上海新力动力设备研究所 | Engine lining layer solvent-free spray molding process |
| CN109232848A (en) * | 2018-03-22 | 2019-01-18 | 湖北航天化学技术研究所 | A kind of solid propellant rocket motor charge DDI lining and its application method |
| CN113714067A (en) * | 2020-05-25 | 2021-11-30 | 中国石油化工股份有限公司 | Spraying method of explosion-proof coating |
-
2022
- 2022-07-22 CN CN202210871357.1A patent/CN115216216B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4543366A (en) * | 1984-09-10 | 1985-09-24 | Thermocell Development, Ltd. | Sprayable urethane resin composition and method |
| JPH0255862A (en) * | 1988-08-12 | 1990-02-26 | Morton Thiokol Inc | Manufacture of rocket motor and rocket motor liner composition |
| US4956397A (en) * | 1989-07-17 | 1990-09-11 | The United States Of America As Represented By The Secretary Of The Air Force | Insulating liner for solid rocket motor containing vulcanizable elastomer and a bond promoter which is a novolac epoxy or a resole treated cellulose |
| CN105855145A (en) * | 2016-04-01 | 2016-08-17 | 上海新力动力设备研究所 | Engine lining layer solvent-free spray molding process |
| CN109232848A (en) * | 2018-03-22 | 2019-01-18 | 湖北航天化学技术研究所 | A kind of solid propellant rocket motor charge DDI lining and its application method |
| CN113714067A (en) * | 2020-05-25 | 2021-11-30 | 中国石油化工股份有限公司 | Spraying method of explosion-proof coating |
Non-Patent Citations (1)
| Title |
|---|
| 梁彦, 张弛, 张明: "固体火箭发动机燃烧室绝热层的设计与研究", 飞航导弹, no. 09 * |
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