High-temperature-resistant anti-aging fluorine-silicone rubber and preparation method thereof

Abstract

The invention relates to the technical field of rubber, and discloses high-temperature-resistant anti-aging fluorine-silicone rubber and a preparation method thereof.The high-temperature-resistant anti-aging fluorine-silicone rubber is obtained by mixing and vulcanizing silicone rubber, fluorosilicon-based polystyrene, filler, fluororubber, an assistant crosslinker, a vulcanizing agent and the like. The fluorosilicon-based polystyrene improves the compatibility between the fluororubber and the silicone rubber, and is beneficial to improving the tensile property, high temperature resistance and aging resistance of the fluorine-silicone rubber. The fluorosilicon-based polystyrene contains a polystyrene structure, is high in strength, is grafted with a large number of flexible phenyl ether structures, can improve the strength and toughness of the fluorine-silicone rubber after being added into the fluorine-silicone rubber, and has higher tensile strength and elongation at break.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber, in particular to a high-temperature resistant and aging-resistant fluoro-silicone rubber and a preparation method thereof. Background Art

[0002] Fluororubber and silicone rubber blends combine the high-temperature and corrosion resistance of fluororubber with the low-temperature resistance, elasticity, and electrical insulation properties of silicone rubber, finding widespread application in aerospace, automotive, electronics, and other fields. However, the significant difference in polarity between fluororubber and silicone rubber results in poor compatibility, severely impacting the mechanical properties of the blend.

[0003] Developing new compatibilizers for use with fluororubber and silicone rubber is a research challenge. Patent publication number CN115678184B discloses a fluororubber-silicone rubber blend and its preparation method. The invention modifies silicone rubber with a long-chain fluorine-containing compatibilizer to produce a silicone rubber grafted with the fluorine-containing modifier. This compatibilizer improves the poor compatibility between fluororubber and silicone rubber. However, the blend in this patent suffers from low elongation at break and poor toughness. Compared to this patent, the present invention utilizes fluorosilicone-based polystyrene to improve the fluororubber-silicone rubber blend's tensile properties, including elongation at break, as well as its high-temperature resistance and aging resistance. Summary of the Invention

[0004] (1) Technical problems solved: In view of the deficiencies in the prior art, the present invention provides a high-temperature resistant and aging-resistant fluoro-silicone rubber and a preparation method thereof, which solves the problem of poor compatibility between fluoro-rubber and silicone rubber and improves the mechanical properties, high-temperature resistance and aging resistance of fluoro-silicone rubber.

[0005] (II) Technical solution of the present invention: a method for preparing high-temperature resistant and aging-resistant fluorosilicone rubber:

[0006] Step S1, adding silicone rubber into an open mill, adding fluorosilicone-based polystyrene, fillers, and structure control agents after rolling, and thinning and sheeting after mixing to obtain silicone rubber compound.

[0007] Step S2, adding fluororubber to an open mill, adding an acid absorber after rolling, making triangular packages and rolling after the material is eaten, adding the silicone rubber compound prepared in step S1, adding a co-crosslinking agent and a vulcanizing agent after mixing, thinning, sheeting, and then vulcanizing to obtain high temperature resistant and aging-resistant fluoro-silicone rubber.

[0008] Furthermore, the mass ratio of silicone rubber, fluorosilicone-based polystyrene, filler, structure control agent, fluororubber, acid scavenger, cross-linking agent and vulcanizing agent is (50-80):(5-20):(15-35):(3-7):(20-50):(3.6-8.2):(3-4):(2.4-3.2).

[0009] Furthermore, the filler is carbon black or white carbon black.

[0010] Furthermore, the structure control agent is hydroxy silicone oil.

[0011] Furthermore, the acid absorbent includes calcium hydroxide and magnesium oxide.

[0012] Furthermore, the vulcanizing agent includes dicumyl peroxide and bis-25.

[0013] Furthermore, the auxiliary cross-linking agent is triallyl isocyanurate.

[0014] Furthermore, the vulcanization process is first vulcanizing at 160-170° C. for 3-6 minutes in a flat vulcanizing machine, and then vulcanizing at 230-250° C. in a forced air drying oven for 2-3 hours.

[0015] Furthermore, the preparation method of fluorosilicone-based polystyrene includes:

[0016] (1) Add 100:(130-150) of 1,1,3,3-tetramethyl-1,3-bis[3-(oxiranylmethoxy)propyl]disiloxane and 4,4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether to isopropanol, heat to 40-60°C, stir and react for 8-12 hours, cool and filter, wash the product with ethanol, and dry to obtain a fluorosilicone polymer. The preparation reaction formula is:

[0017]

[0018] (2) Add chloromethyl polystyrene and fluorosilicone polymer to N,N-dimethylformamide, stir and then add aqueous sodium hydroxide solution, and control the mass ratio of chloromethyl polystyrene, fluorosilicone polymer and sodium hydroxide to be 100:(25-60):(4-10); heat to 60-75°C, stir and react for 18-24 hours, add water to dilute, filter and wash the product with water, ethanol and dichloromethane in sequence, and dry to obtain fluorosilicone polystyrene.

[0019] (3) Beneficial technical effects: The present invention conducts a ring-opening polymerization reaction of 1,1,3,3-tetramethyl-1,3-bis[3-(oxiranylmethoxy)propyl]disiloxane and 4,4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether to obtain a fluorosilicone polystyrene containing an imino group, a siloxane and a flexible phenyl ether bond; then, under the catalytic action of sodium hydroxide, the imino group of the fluorosilicone polystyrene and the chloromethyl group of the chloromethyl polystyrene undergo a substitution reaction to obtain a fluorosilicone polystyrene; finally, the fluorosilicone polystyrene is mixed with silicone rubber, fluororubber, etc. and vulcanized to obtain a high-temperature resistant and aging-resistant fluoro-silicone rubber.

[0020] The fluorosilicone-based polystyrene of the present invention is grafted with siloxane and fluorine-containing groups, and has a high structural similarity with both fluororubber and silicone rubber. It can make the fluorosilicone-based polystyrene play a volume-increasing role, improve the compatibility between fluororubber and silicone rubber, and is beneficial to improving the tensile properties of fluoro-silicone rubber. Fluororubber and silicone rubber form a uniform dispersed phase, which is not prone to phase separation defects, so that the rubber has better high-temperature resistance and aging resistance.

[0021] The fluorosilicone-based polystyrene of the present invention contains a polystyrene structure, has high strength, and is grafted with a large number of flexible phenyl ether structures. When added to fluoro-silicone rubber, it can improve the strength and toughness of the fluoro-silicone rubber and has higher tensile strength and elongation at break. DETAILED DESCRIPTION

[0022] In order to make the technical solution of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below. It should be noted that the following embodiments are only used to better understand the technical solution of the present invention and should not be understood as limiting the present invention.

[0023] The following silicone rubber is methyl vinyl silicone rubber, model RBG-0611, sourced from Guangzhou Shenkai Trading Co., Ltd. The fluororubber model PFE 133TB is sourced from Shanghai Xianshun Plastics Co., Ltd. The chloromethyl polystyrene resin is sourced from Wuhan Yuqing Jiaheng Pharmaceutical Co., Ltd.

[0024] 4,4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether was prepared according to the method described in the article "Synthesis and Characterization of Polyimide Membrane Materials Based on Phenyl Ether-Type Fluorinated Diamines" published in the Journal of Polymer Science, Issue 1, January 2010. The structural formula is

[0025] Example 1:

[0026] (1) To 400 mL of isopropanol were added 20 g (55.2 mmol) of 1,1,3,3-tetramethyl-1,3-bis[3-(oxiranylmethoxy)propyl]disiloxane and 28.7 g (55.2 mmol) of 4,4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether. The mixture was heated to 60°C and stirred for 8 h. After cooling, the mixture was filtered, washed with ethanol, and dried to obtain a fluorosilicone polymer.

[0027] (2) Add 60 g of chloromethyl polystyrene and 15 g of fluorosilicone polymer to 700 mL of N,N-dimethylformamide, stir, add 10 mL of an aqueous solution containing 2.4 g of sodium hydroxide, heat to 70 ° C, stir and react for 24 h, add water to dilute, filter, wash the product with water, ethanol, and dichloromethane in sequence, and dry to obtain fluorosilicone polystyrene.

[0028] (3) 800 g of silicone rubber was added to an open mill, and after being rolled, 50 g of fluorosilicone polystyrene, 350 g of white carbon black, and 70 g of hydroxy silicone oil were added. After mixing, the mixture was thinned and sheeted to obtain a silicone rubber compound.

[0029] (4) Add 200g of fluororubber to an open mill, add 12g of calcium hydroxide and 24g of magnesium oxide after rolling, make a triangle bag and roll it after eating, add the silicone rubber compound prepared in (3), add 30g of triallyl isocyanurate and 27g of diisopropylbenzene peroxide after mixing, thin it and put it into a sheet, then vulcanize it at 160℃ for 6min in a flat vulcanizer, and finally vulcanize it at 250℃ for 2h in a blast drying oven to obtain high temperature resistant and aging resistant fluoro-silicone rubber.

[0030] Example 2:

[0031] (1) To 400 mL of isopropanol, add 20 g of 1,1,3,3-tetramethyl-1,3-bis[3-(oxiranylmethoxy)propyl]disiloxane and 30 g of 4,4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether, heat to 60°C, stir and react for 8 h, cool and filter, wash the product with ethanol, and dry to obtain a fluorosilicone polymer.

[0032] (2) Add 60 g of chloromethyl polystyrene and 36 g of fluorosilicone polymer to 900 mL of N,N-dimethylformamide, stir, add 15 mL of an aqueous solution containing 6 g of sodium hydroxide, heat to 60 ° C, stir and react for 24 hours, add water to dilute, filter, wash the product with water, ethanol, and dichloromethane in sequence, and dry to obtain fluorosilicone polystyrene.

[0033] (3) Add 650g of silicone rubber into an open mill, add 120g of fluorosilicone polystyrene, 250g of carbon black, and 50g of hydroxy silicone oil after rolling, and after mixing, thin it and sheet it to obtain a silicone rubber compound.

[0034] (4) Add 350g of fluororubber into an open mill, add 20g of calcium hydroxide and 40g of magnesium oxide after rolling, make triangle packages and rolls after feeding, add the silicone rubber compound prepared in (3), add 33g of triallyl isocyanurate, 27g of diisopropyl peroxide and 24g of di-25 after mixing, thin it and put it into sheets, then vulcanize it at 170℃ for 3min in a flat vulcanizer, and finally vulcanize it at 230℃ for 3h in a blast drying oven to obtain high temperature resistant and aging resistant fluoro-silicone rubber.

[0035] Example 3:

[0036] (1) To 300 mL of isopropanol, add 20 g of 1,1,3,3-tetramethyl-1,3-bis[3-(oxiranylmethoxy)propyl]disiloxane and 26 g of 4,4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether, heat to 50°C, stir and react for 8 h, cool and filter, wash the product with ethanol, and dry to obtain a fluorosilicone polymer.

[0037] (2) Add 60 g of chloromethyl polystyrene and 25 g of fluorosilicone polymer to 900 mL of N,N-dimethylformamide, stir, add 12 mL of an aqueous solution containing 4 g of sodium hydroxide, heat to 75 ° C, stir and react for 18 h, add water to dilute, filter, wash the product with water, ethanol, and dichloromethane in sequence, and dry to obtain fluorosilicone polystyrene.

[0038] (3) Add 500g of silicone rubber into an open mill, add 200g of fluorosilicone polystyrene, 150g of white carbon black, and 30g of hydroxy silicone oil after rolling, and after mixing, thin it and slice it to obtain a silicone rubber compound.

[0039] (4) Add 500g of fluororubber into an open mill, add 30g of calcium hydroxide and 52g of magnesium oxide after rolling, make a triangle bag and roll it after eating, add the silicone rubber compound prepared in (3), add 40g of triallyl isocyanurate and 32g of diisopropylbenzene peroxide after mixing, thin it and put it into a sheet, then vulcanize it at 165℃ for 4min in a flat vulcanizer, and finally vulcanize it at 250℃ for 2h in a forced air drying oven to obtain high temperature resistant and aging resistant fluorosilicone rubber.

[0040] Comparative Example 1:

[0041] (1) Add 800g of silicone rubber into an open mill, add 350g of white carbon black and 70g of hydroxy silicone oil after rolling, mix and thin it and sheet it to obtain silicone rubber compound.

[0042] (2) Add 200g of fluororubber to an open mill, add 12g of calcium hydroxide and 24g of magnesium oxide after rolling, make a triangle bag and roll it after eating, add the silicone rubber compound prepared in (1), add 30g of triallyl isocyanurate and 27g of diisopropylbenzene peroxide after mixing, thin it and put it into a sheet, then vulcanize it in a flat vulcanizer at 160℃ for 6min, and finally vulcanize it in a blast drying oven at 250℃ for 2h to obtain fluoro-silicone rubber.

[0043] Comparative Example 2:

[0044] (1) 800 g of silicone rubber was added to an open mill, and after being rolled, 50 g of chloromethyl polystyrene, 350 g of white carbon black, and 70 g of hydroxy silicone oil were added. After mixing, the mixture was thinned and sheeted to obtain a silicone rubber compound.

[0045] (2) Add 200g of fluororubber to an open mill, add 12g of calcium hydroxide and 24g of magnesium oxide after rolling, make a triangle bag and roll it after eating, add the silicone rubber compound prepared in (1), add 30g of triallyl isocyanurate and 27g of diisopropylbenzene peroxide after mixing, thin it and put it into a sheet, then vulcanize it in a flat vulcanizer at 160℃ for 6min, and finally vulcanize it in a blast drying oven at 250℃ for 2h to obtain fluoro-silicone rubber.

[0046] Comparative Example 3

[0047] (1) To 400 mL of isopropanol, 20 g of 1,1,3,3-tetramethyl-1,3-bis[3-(oxiranylmethoxy)propyl]disiloxane and 18.4 g (55.2 mmol) of 2,2-bis(4-aminophenyl)hexafluoropropane (CAS No. 1095-78-9) were added. The mixture was heated to 60°C and stirred for 8 h. After cooling, the mixture was filtered, washed with ethanol, and dried to obtain a fluorosilicone polymer.

[0048] (2) Add 60 g of chloromethyl polystyrene and 15 g of fluorosilicone polymer to 700 mL of N,N-dimethylformamide, stir, add 10 mL of an aqueous solution containing 2.4 g of sodium hydroxide, heat to 70 ° C, stir and react for 24 h, add water to dilute, filter, wash the product with water, ethanol, and dichloromethane in sequence, and dry to obtain fluorosilicone polystyrene.

[0049] (3) 800 g of silicone rubber was added to an open mill, and after being rolled, 50 g of fluorosilicone polystyrene, 350 g of white carbon black, and 70 g of hydroxy silicone oil were added. After mixing, the mixture was thinned and sheeted to obtain a silicone rubber compound.

[0050] (4) Add 200g of fluororubber to an open mill, add 12g of calcium hydroxide and 24g of magnesium oxide after rolling, make a triangle bag and roll it after eating, add the silicone rubber compound prepared in (3), add 30g of triallyl isocyanurate and 27g of diisopropylbenzene peroxide after mixing, thin it and put it into a sheet, then vulcanize it in a flat vulcanizer at 160℃ for 6min, and finally vulcanize it in a blast drying oven at 250℃ for 2h to obtain fluoro-silicone rubber.

[0051] Comparative Example 4:

[0052] (1) To 400 mL of isopropanol, 9.6 g (55.2 mmol) of ethylene glycol diglycidyl ether and 27.2 g of 4,4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether were added, heated to 60°C, stirred and reacted for 8 h, cooled and filtered, and the product was washed with ethanol and dried to obtain a fluorinated polymer.

[0053] (2) Add 60 g of chloromethyl polystyrene and 15 g of fluorine-containing polymer to 700 mL of N,N-dimethylformamide, stir, add 10 mL of an aqueous solution containing 2.4 g of sodium hydroxide, heat to 70 ° C, stir and react for 24 h, add water to dilute, filter, wash the product with water, ethanol, and dichloromethane in sequence, and dry to obtain fluorine-containing polystyrene.

[0054] (3) 800 g of silicone rubber was added to an open mill, and after being rolled, 50 g of fluorinated polystyrene, 350 g of white carbon black, and 70 g of hydroxy silicone oil were added. After mixing, the mixture was thinned and sheeted to obtain a silicone rubber compound.

[0055] (4) Add 200g of fluororubber to an open mill, add 12g of calcium hydroxide and 24g of magnesium oxide after rolling, make a triangle bag and roll it after eating, add the silicone rubber compound prepared in (3), add 30g of triallyl isocyanurate and 27g of diisopropylbenzene peroxide after mixing, thin it and put it into a sheet, then vulcanize it in a flat vulcanizer at 160℃ for 6min, and finally vulcanize it in a blast drying oven at 250℃ for 2h to obtain fluoro-silicone rubber.

[0056] Comparative Example 5:

[0057] (1) Silicone rubber grafted with 2,2,2-trifluoroethyl methacrylate was prepared according to the method described in the article “Compatibilization effect of MVQ-g-TFEMA on fluororubber / silicone rubber blends” in the journal Elastomers, No. 2, 2010, pp. 25-28.

[0058] (2) 800 g of silicone rubber was added to an open mill, and after being rolled, 50 g of silicone rubber grafted 2,2,2-trifluoroethyl methacrylate, 350 g of white carbon black, and 70 g of hydroxy silicone oil were added. After mixing, the mixture was thinned and sheeted to obtain a silicone rubber compound.

[0059] (3) Add 200g of fluororubber to an open mill, add 12g of calcium hydroxide and 24g of magnesium oxide after rolling, make a triangle bag and roll it after eating, add the silicone rubber compound prepared in (2), add 30g of triallyl isocyanurate and 27g of diisopropylbenzene peroxide after mixing, thin it and put it into a sheet, then vulcanize it in a flat vulcanizer at 160℃ for 6min, and finally vulcanize it in a blast drying oven at 250℃ for 2h to obtain fluoro-silicone rubber.

[0060] The tensile properties of fluoro-silicone rubber are tested according to GB / T528-2009. The fluoro-silicone rubber is placed in a forced air drying oven and heat aged at 180°C for 120 hours. The rubber is removed and left at room temperature for 24 hours before the tensile properties are tested again.

[0061] Table 1 Performance test

[0062]

[0063] The compatibility between the fluororubber and silicone rubber in Comparative Example 1 is poor, resulting in low tensile strength and elongation at break of the fluoro-silicone rubber. Moreover, after thermal aging, the retention rate of the tensile strength and elongation at break of the rubber is low, and the high temperature resistance and aging resistance are poor.

[0064] Fluorosilicone-based polystyrene was added to Examples 1 to 3. Polystyrene was grafted with siloxane and fluorine-containing groups, and had a high structural similarity with both fluororubber and silicone rubber. Fluorosilicone-based polystyrene could play a role in volume expansion, thereby improving the compatibility between fluororubber and silicone rubber, which was beneficial to improving the tensile properties of fluoro-silicone rubber. Fluororubber and silicone rubber formed a uniform dispersed phase, which made the rubber have better high-temperature resistance and aging resistance. After thermal aging, the tensile strength and elongation at break of the rubber were highly retained. At the same time, fluorosilicone-based polystyrene contained a polystyrene structure, had high strength, and was grafted with a large amount of flexible phenyl ether structure. When added to fluoro-silicone rubber, the strength and toughness of the rubber could be improved, and the rubber had higher tensile strength and elongation at break.

[0065] In Comparative Example 2, only chloromethyl polystyrene is added, which cannot play the role of compatibilizing fluororubber and silicone rubber, and the reinforcing and compatibilizing effect of chloromethyl polystyrene is very poor, resulting in low tensile properties of the rubber, and low retention rate of tensile strength and elongation at break after thermal aging, and poor high temperature resistance and aging resistance.

[0066] The 2,2-bis(4-aminophenyl)hexafluoropropane of Comparative Example 3 does not contain a flexible phenyl ether bond, and the prepared fluorosilicone polymer and fluorosilicone-based polystyrene do not contain a flexible phenyl ether bond, making it difficult to effectively improve the toughness and elongation at break of the fluorosilicone rubber, which are significantly lower than those in Example 1.

[0067] The ethylene glycol diglycidyl ether of comparative example 4 does not contain a siloxane bond, and the prepared fluorine-containing polymer and its fluorine-containing polystyrene do not contain a siloxane bond, and cannot play the role of compatibilizing fluororubber and silicone rubber, resulting in low tensile properties of fluoro-silicone rubber, and low retention rate of tensile strength and elongation at break after thermal aging, and poor high temperature resistance and aging resistance.

[0068] Comparative Example 5 uses conventional rubber-grafted 2,2,2-trifluoroethyl methacrylate as a compatibilizer for fluororubber and silicone rubber. It does not contain polystyrene molecular chains or flexible phenyl ether bonds, resulting in the tensile strength and elongation at break of the fluoro-silicone rubber being significantly lower than those in Example 1.

Claims

1. A method for preparing high temperature resistant and aging resistant fluoro-silicone rubber, characterized in that: The preparation method comprises: Step S1, adding silicone rubber to an open mill, adding fluorosilicone-based polystyrene, fillers, and structure control agents after rolling, and thinning and sheeting after mixing to obtain a silicone rubber compound; Step S2, adding fluororubber to an open mill, adding an acid absorber after rolling, making triangular packages and rolling after the material is eaten, adding the silicone rubber compound prepared in step S1, adding a co-crosslinking agent and a vulcanizing agent after mixing, thinning, sheeting, and then vulcanizing to obtain high temperature resistant and aging-resistant fluoro-silicone rubber.

2. The method for preparing high temperature resistant and aging resistant fluoro-silicone rubber according to claim 1, characterized in that: The mass ratio of the silicone rubber, fluorosilicone-based polystyrene, filler, structure control agent, fluororubber, acid scavenger, cross-linking agent and vulcanizing agent is (50-80):(5-20):(15-35):(3-7):(20-50):(3.6-8.2):(3-4):(2.4-3.2).

3. The method for preparing high temperature resistant and aging resistant fluoro-silicone rubber according to claim 2, characterized in that: The filler is carbon black or white carbon black, and the structure control agent is hydroxy silicone oil.

4. The method for preparing high temperature resistant and aging resistant fluoro-silicone rubber according to claim 2, characterized in that: The acid scavenger is one or more of calcium hydroxide and magnesium oxide.

5. The method for preparing high temperature resistant and aging resistant fluoro-silicone rubber according to claim 2, characterized in that: The vulcanizing agent is dicumyl peroxide or diisocyanurate, and the auxiliary cross-linking agent is triallyl isocyanurate.

6. The method for preparing high temperature resistant and aging resistant fluoro-silicone rubber according to claim 1, characterized in that: The vulcanization process is as follows: first vulcanizing the material in a flat vulcanizing machine at 160-170° C. for 3-6 minutes, and then vulcanizing the material in a blast drying oven at 230-250° C. for 2-3 hours.

7. The method for preparing high temperature resistant and aging resistant fluoro-silicone rubber according to claim 2, characterized in that: The preparation method of the fluorosilicone-based polystyrene comprises: (1) Adding 1,1,3,3-tetramethyl-1,3-bis[3-(oxiranylmethoxy)propyl]disiloxane and 4,4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether to isopropanol, heating to 40-60°C, stirring and reacting for 8-12 hours, cooling and filtering, washing the product, and drying to obtain a fluorosilicone polymer; (2) Chloromethyl polystyrene and fluorosilicone polymer are added to N,N-dimethylformamide, and after stirring, sodium hydroxide aqueous solution is added, heated to 60-75°C, stirred for 18-24 hours, diluted with water, filtered, washed, and dried to obtain fluorosilicone polystyrene.

8. The method for preparing high temperature resistant and aging resistant fluoro-silicone rubber according to claim 7, characterized in that: The mass ratio of 1,1,3,3-tetramethyl-1,3-bis[3-(oxiranylmethoxy)propyl]disiloxane and 4,4'-bis(4-amino-2-trifluoromethylphenoxy)diphenyl ether in (1) is 100:(130-150).

9. The method for preparing high temperature resistant and aging resistant fluoro-silicone rubber according to claim 7, characterized in that: The mass ratio of chloromethyl polystyrene, fluorosilicone polymer and sodium hydroxide in (2) is 100:(25-60):(4-10).

10. A high temperature resistant and aging resistant fluoro-silicone rubber obtained by the preparation method according to any one of claims 1 to 9.

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