Silicon resin filled EPDM heat insulation material
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A technology of thermal insulation material and silicone resin, which is applied in the field of rubber compound to achieve the effect of improving the ability to scour external stress, excellent ablation resistance, and hard and dense carbon layer
Active Publication Date: 2016-07-20
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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As for other types of silicone resins, especially phenyl silicone resins and vinyl silicone resins, because of their excellent thermo-oxidative stability, cold resistance, weather resistance, electrical insulation, hydrophobicity and a
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Embodiment 1- Embodiment 5
[0039] The formula of table 1 embodiment 1-embodiment 5 and material kind *
[0040]
[0041] SR-1 is phenyl silicone rubber with grade 120-1; SR-2 is a phenyl silicone resin; SR-3 is a methyl silicone resin;
[0042] SR-4 is a cage-type silsesquioxane silicone resin.
[0043] (1) stocking: stocking according to the proportioning of each embodiment in table 1;
[0044] Description: The total number of fillers in Example 2-Example 5 is 169phr, respectively: EPDM, 100.0; ZnO, 3.0; SA, 1.0; vulcanizing agent, 3.0; surfactant, 3.0; tackifying resin, 10.0; Fiber, 8.0; Carbon Black (C), 5.0; SiO 2 , 10.0; smoke suppressant (MoO 3 ), 3.0; MMg, 3.0; silicone, 20.0. Embodiment 1 does not add silicone resin, and the total number of parts of material is 149phr.
[0045] (2) Mixing and sample preparation: operate according to the mixing and vulcanization process of the conventional thermal insulation layer.
[0046] (3) Performance test: Test the performance of the insulation ma...
Embodiment 6- Embodiment 9
[0052] The formula of table 3 embodiment 6-embodiment 9
[0053] (1)
[0054] (2) stocking: stocking according to the proportioning of each embodiment in table 3;
[0055] The common basic formula of embodiment 6-embodiment 9 selects the material and proportion of embodiment 1, namely: EPDM, 100.0; ZnO, 3.0; SA, 1.0; DCP, 3.0; WD-70, 3.0; TR, 10.0; PA , 8.0; carbon black (C), 5.0; SiO 2 , 10.0; smoke suppressant (MoO 3 ), 3.0; MMg, 3.0, a total of 149phr.
[0056] (3) Mixing and sample preparation: operate according to the mixing and vulcanization process of the conventional heat insulation layer.
[0057] (4) Performance test: Test the performance of the insulation material according to the corresponding standard specifications, and the specific results are shown in Table 4.
[0058] Example 6-Example 9 adjusted the amount of two silicone resins, SR-2 and SR-4, and added an appropriate amount of magnesium salt (MMg). From the results in Table 5, it can be seen that wi...
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Abstract
A silicon resin filled EPDM heat insulation material is prepared from, by weight, 100 parts of EPDM rubber, 20-60 parts of silicon resin, 3-20 parts of a metallic compound, 15-20 parts of a fortifier, 8-15 parts of organic fibers, 8-12 parts of tackifying resin and 3-12 parts of other auxiliaries.An appropriate amount of silicon resin and metallic compound are added into the EPDM heat insulation material, a molten silicate sticky liquid membrane is generated in situ by means of high-temperature pyrolysis and reaction, the molten silicate sticky liquid membrane is attached to the surface of a cracked solid residue, a solid network structure is formed by the solid residue in a physical crosslinking mode through adhesion action of the liquid membrane, self-supporting capacity and the function of resisting outer scouring of a heat insulation carbonizing layer are added, and scouring resistance and ablation resistance of the heat insulation material are effectively improved.The rubber type heat insulation material can be used in an engine, widely used for manufacturing porcelainized wire and cable materials and widely used in other fields needing fire prevention and flame retardance.
Description
technical field [0001] The invention relates to a rubber compound filled with organosilicon polymers, in particular to a silicone-filled EPDM heat-insulating material, and at the same time relates to the effect of the silicone resin on the performance of the EPDM heat-insulated material. Background technique [0002] EPDM rubber has the advantages of low density, good weather resistance, aging resistance, heat resistance, etc., and its density is 0.86g / cm 3 Left and right, it has a large filling coefficient, and has good compatibility with various propellants and shell composite materials, and is an ideal thermal insulation material in the engine shell. At present, the commonly used EPDM insulation materials are mostly composed of organic fibers, flame retardants, tackifiers, reinforcing agents (mostly silica) and other functional additives. It is very easy to be cracked into small molecular gas by heat, and the pyrolysis carbon layer and inorganic filler remain. Since the ...
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