Platinum catalyst, one-component addition type silicone rubber composition prepared therewith, and method for preparing the same

Abstract

The application provides a platinum catalyst, a one-component addition type silicone rubber composition prepared by using the platinum catalyst and a preparation method of the one-component addition type silicone rubber composition. x (L2) y (L3) z Pt formula (I); in the formula (I), L1 is a methyl siloxane ligand containing a vinyl group, L2 is a ligand containing a tertiary amine group, and L3 is a ligand containing an unsaturated acid allyl ester; x is 0.1-2; y is 0.1-2; z is 0.1-2; and x+y+z=4. The platinum catalyst obtained by using a methyl siloxane containing a vinyl group, a compound containing a tertiary amine group and a compound containing an unsaturated acid allyl ester as ligands of Pt is used for catalyzing a silicon hydrogen addition, and has low catalytic activity at room temperature and low temperature and high catalytic activity at high temperature, and is suitable for being used in the field of addition type vulcanized liquid silicone rubber, and the obtained one-component addition type silicone rubber has excellent room temperature storage stability and storage and transportation stability.

Description

Technical Field

[0001] This application relates to the field of polymer materials technology, specifically to a platinum catalyst, a one-component addition-type silicone rubber composition prepared therefrom, and a method for preparing the same. Background Technology

[0002] In the field of addition-cured liquid silicone rubber, platinum catalysts are the main catalysts used for hydrosilylation. One-component addition-cured silicone rubber systems contain catalysts, crosslinking agents, and inhibitors. When not in use, they need to be stored at temperatures below zero or lower. When in use, they can be cured by raising the temperature to above 100°C for at least 60 minutes.

[0003] Low-temperature storage or transportation brings many inconveniences to one-component addition-curing silicone rubber. Therefore, it is of great significance to develop one-component addition-curing silicone rubber that can be stored for a long time at room temperature and cured rapidly at high temperature. Summary of the Invention

[0004] In view of this, the technical problem to be solved by this application is to provide a platinum catalyst, a one-component addition-type silicone rubber composition prepared therefrom, and a method for preparing the same. The platinum catalyst provided by this application has low activity at room temperature and high activity at high temperature, and has good room temperature storage performance and high temperature curing performance when used in one-component addition-type silicone rubber.

[0005] This application provides a platinum catalyst comprising the complex shown in formula (I):

[0006] (L1) x (L2) y (L3) z Pt formula (I);

[0007] In formula (I), L1 is a vinyl methylsiloxane ligand, L2 is a ligand containing a tertiary amine group, and L3 is a ligand containing an allyl ester of an unsaturated acid.

[0008] x is 0.1~2; y is 0.1~2; z is 0.1~2; x+y+z=4.

[0009] In some specific implementations, L1 is tetramethyldivinyldisiloxane;

[0010] L2 is tetramethylethylenediamine or 2,2'-bipiperidine;

[0011] L3 is diallyl maleate.

[0012] In some specific implementations, x is 1.5 to 2;

[0013] y is 0.5~1.5;

[0014] z is 1~1.5.

[0015] In some specific implementations, the platinum catalyst further includes a diluent;

[0016] The diluent includes one or more of α,ω-divinyl-terminated polydimethylsiloxane and toluene;

[0017] The content of the complex shown in formula (I) is 1000ppm to 10000ppm, calculated as platinum.

[0018] This application also provides a method for preparing the platinum catalyst described in the above technical solution, comprising the following steps:

[0019] 1) A mixed solution is obtained by reacting a platinum source, L1 ligand, L3 ligand, basic compound, and organic solvent.

[0020] 2) The mixed solution, L2 ligand, and diluent are reacted to obtain a platinum catalyst. In some specific implementations, the platinum source is chloroplatinic acid hexahydrate;

[0021] The alkaline compound is sodium bicarbonate;

[0022] The organic solvent is isopropanol;

[0023] The diluent includes one or more of α,ω-divinyl-terminated polydimethylsiloxane and toluene.

[0024] In some specific implementations, in step 1), the reaction temperature is 50℃~90℃ and the time is 40min~80min;

[0025] In step 2), the reaction temperature is 40℃~60℃ and the time is 2h~5h.

[0026] This application also provides a one-component addition-type silicone rubber composition, comprising a liquid silicone rubber base and the platinum catalyst described in the above-mentioned technical solution.

[0027] In some specific implementations, the liquid silicone rubber base material includes:

[0028] 50 to 100 parts by weight of vinyl silicone oil;

[0029] 5 parts by weight to 50 parts by weight of filler;

[0030] 1 to 10 parts by weight of filler modifier;

[0031] 1 to 10 parts by weight of crosslinking agent;

[0032] 0.1 to 5 parts by weight of adhesion promoter;

[0033] Inhibitors ranging from 0.01 to 1 part by weight.

[0034] In some specific implementations, the viscosity of the vinyl silicone oil is 2000 cs to 200000 cs;

[0035] The filler is fumed silica;

[0036] The filler modifier is hexamethyldisilazane;

[0037] The crosslinking agent is hydrogen-containing silicone oil;

[0038] In some specific implementations, the hydrogen content of the hydrogen-containing silicone oil is 0.1% to 1%.

[0039] The adhesion promoter includes one or more of glycidoxypropyltrimethoxysilane, aminopropyltriethoxysilane and N-aminoethyl-γ-aminopropyltrimethoxysilane;

[0040] The inhibitors include one or more of ethynylcyclohexanol and 2-methyl-3-butyn-2-ol.

[0041] In some specific implementations, the content of the platinum catalyst, calculated as platinum in the complex shown in formula (I), is 1 ppm to 30 ppm.

[0042] The platinum catalyst provided in this application has the structure of formula (I): (L1) x (L2) y (L3) z Pt is of formula (I); in formula (I), L1 is a vinyl-containing methylsiloxane ligand, L2 is a ligand containing a tertiary amine group, and L3 is a ligand containing an allyl ester of an unsaturated acid; x is 0.1~2; y is 0.1~2; z is 0.1~2; x+y+z=4. This application uses a vinyl-containing methylsiloxane, a compound containing a tertiary amine group, and a compound containing an allyl ester of an unsaturated acid as ligands for Pt. The resulting platinum catalyst exhibits low catalytic activity at room temperature and low temperatures, but high catalytic activity at high temperatures when used for catalyzing hydrosilylation. It is suitable for use in the field of addition-cured liquid silicone rubber. The resulting one-component addition-cured silicone rubber has excellent room temperature storage stability and storage and transportation stability, and good curing properties at high temperatures. Experimental results show that the one-component addition-cured silicone rubber composition provided in this application is stable under room temperature and occasional overheating conditions, and the properties after curing are almost identical to the initial properties. Detailed Implementation

[0043] This application provides a platinum catalyst, a one-component addition-type silicone rubber composition, and a method for preparing the same. Those skilled in the art can refer to the content of this application and appropriately modify the process parameters to achieve the desired results. The methods and applications of this application have been described through preferred embodiments. Those skilled in the art can clearly modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit, and scope of this application to realize and apply the technology of this application.

[0044] This application provides a platinum catalyst comprising the complex shown in formula (I):

[0045] (L1) x (L2) y (L3) z Pt formula (I);

[0046] In formula (I), L1 is a vinyl methylsiloxane ligand, L2 is a ligand containing a tertiary amine group, and L3 is a ligand containing an allyl ester of an unsaturated acid.

[0047] x is 0.1~2; y is 0.1~2; z is 0.1~2; x+y+z=4.

[0048] In formula (I), L1, L2 and L3 are ligands of Pt, wherein L1 is a vinyl methylsiloxane ligand, such as tetramethyldivinyldisiloxane; L2 is a ligand containing a tertiary amine group, such as tetramethylethylenediamine or 2,2'-bipiperidine, preferably 2,2'-bipiperidine; and L3 is a ligand containing an allyl ester of an unsaturated acid, such as diallyl maleate.

[0049] In formula (I), x, y, and z are the molar ratios of the corresponding ligands to Pt, x is 0.1~2, preferably 0.5~2, more preferably 1.5~2; y is 0.1~2, preferably 0.5~1.5; z is 0.1~2, preferably 0.5~1.5, more preferably 1~1.5; x+y+z=4.

[0050] In some specific implementations, the platinum catalyst further includes a diluent, which includes, but is not limited to, α,ω-divinyl-terminated polydimethylsiloxane, toluene, etc., and may be one or more of these, preferably α,ω-divinyl-terminated polydimethylsiloxane. In some specific implementations, when the platinum catalyst includes the complex shown in formula (I) and the diluent, the content of the complex shown in formula (I), calculated as platinum, is 1000 ppm to 10000 ppm, preferably 3000 ppm to 8000 ppm, and more preferably 5000 ppm.

[0051] This application also provides a method for preparing the platinum catalyst described in the above technical solution, comprising the following steps:

[0052] 1) A mixed solution is obtained by reacting a platinum source, L1 ligand, L3 ligand, basic compound, and organic solvent.

[0053] 2) The mixed solution, L2 ligand and diluent are mixed and reacted to obtain a platinum catalyst.

[0054] This application first uses a platinum source, L1 ligand, and L3 ligand as raw materials, and reacts them in an organic solvent under the action of a basic compound to obtain a mixed solution. The L1 and L3 ligands are as described above and will not be repeated here. In some specific implementations, the platinum source includes, but is not limited to, chloroplatinic acid or chloroplatinic acid hexahydrate, and may be one or more of these, preferably chloroplatinic acid or chloroplatinic acid hexahydrate. In some specific implementations, the basic compound includes, but is not limited to, sodium bicarbonate, potassium bicarbonate, and may be one or more of these, preferably sodium bicarbonate. In some specific implementations, the organic solvent is isopropanol.

[0055] Specifically, this application involves mixing a platinum source, L1 ligand, L3 ligand, a basic compound, and an organic solvent, then heating the mixture to allow for a reaction. After the reaction is complete, the resulting reaction solution is cooled and filtered to obtain a mixed solution. In some specific implementations, the heating is a slow process. In some specific implementations, the reaction temperature is 50℃~90℃, preferably 60℃~80℃; the reaction time is 40min~80min, preferably 50min~70min.

[0056] After obtaining the mixed solution, the mixed solution is reacted with the L2 ligand and diluent to obtain the platinum catalyst. The L2 ligand is described above and will not be repeated here. In some specific implementations, the diluent includes, but is not limited to, α,ω-divinyl-terminated polydimethylsiloxane, toluene, etc., and may be one or more of these, preferably α,ω-divinyl-terminated polydimethylsiloxane. In some specific implementations, the viscosity of the α,ω-divinyl-terminated polydimethylsiloxane is 200 cs to 1000 cs, preferably 400 cs to 700 cs. In some specific implementations, the amount of diluent is not particularly limited and can be added according to the concentration of the complex shown in formula (I) in the final product.

[0057] This application involves mixing a mixed solution, an L2 ligand, and a diluent, and then reacting the mixture under stirring. After the reaction is complete, the solvent and excess ligand are removed to obtain a platinum catalyst. In some specific implementations, the reaction temperature is 40℃~60℃, preferably 45℃~55℃; the reaction time is 2h~5h, preferably 3h~4h. After the reaction is complete, the resulting solution is subjected to rotary evaporation to remove the solvent and excess ligand, thus obtaining the platinum catalyst.

[0058] This application also provides a one-component addition-type silicone rubber composition, comprising a liquid silicone rubber base and the platinum catalyst described in the above-mentioned technical solution.

[0059] In some specific implementations, the platinum catalyst, calculated as platinum in the complex shown in formula (I), has a content of 1 ppm to 30 ppm, preferably 5 ppm to 10 ppm.

[0060] In some specific implementations, the liquid silicone rubber base material includes:

[0061] 50 to 100 parts by weight of vinyl silicone oil;

[0062] 5 parts by weight to 50 parts by weight of filler;

[0063] 1 to 10 parts by weight of filler modifier;

[0064] 1 to 10 parts by weight of crosslinking agent;

[0065] 0.1 to 5 parts by weight of adhesion promoter;

[0066] Inhibitors ranging from 0.01 to 1 part by weight.

[0067] The liquid silicone rubber base material provided in this application includes vinyl silicone oil, wherein the vinyl silicone oil is α,ω-divinyl-terminated polydimethylsiloxane. In some specific implementations, the viscosity of the vinyl silicone oil (i.e., α,ω-divinyl-terminated polydimethylsiloxane) is 2000 cs to 200000 cs, preferably 8000 cs to 100000 cs. In some specific implementations, the content of the vinyl silicone oil is 50 parts by weight to 100 parts by weight, preferably 60 parts by weight to 80 parts by weight.

[0068] The liquid silicone rubber base material provided in this application includes a filler, wherein the filler is fumed silica. In some specific implementations, the specific surface area of ​​the fumed silica is 100 m². 2 / g ~500m 2 / g, preferably 150 m 2 / g ~400m 2 / g, preferably 200 m 2 / g ~300m 2 / g. In some specific implementations, the content of the filler is 5 parts by mass to 40 parts by mass, preferably 10 parts by mass to 35 parts by mass, and more preferably 20 parts by mass to 30 parts by mass.

[0069] The liquid silicone rubber base material provided in this application includes a filler modifier, which includes, but is not limited to, hexamethyldisilazane, α,ω-dihydroxy-terminated polydimethylsiloxane, etc., and may be one or more of them, preferably hexamethyldisilazane. In some specific implementations, the content of the filler modifier is 1 part by weight to 10 parts by weight, preferably 2 parts by weight to 8 parts by weight, and more preferably 3 parts by weight to 7 parts by weight.

[0070] The liquid silicone rubber base material provided in this application includes a crosslinking agent, which is a hydrogen-containing silicone oil. In some specific implementations, the viscosity of the hydrogen-containing silicone oil is 10 cs to 200 cs, preferably 30 cs to 100 cs. In some specific implementations, the hydrogen content of the hydrogen-containing silicone oil is 0.1% to 1%, preferably 0.3% to 0.8%. In some specific implementations, the amount of the crosslinking agent is 1 part by weight to 10 parts by weight, preferably 3 parts by weight to 7 parts by weight.

[0071] The liquid silicone rubber base material provided in this application includes an adhesion promoter, which includes, but is not limited to, glycidoxypropyltrimethoxysilane, aminopropyltriethoxysilane, N-aminoethyl-γ-aminopropyltrimethoxysilane, etc., and may be one or more of them, preferably glycidoxypropyltrimethoxysilane. In some specific implementations, the content of the adhesion promoter is 0.1 parts by weight to 5 parts by weight, preferably 0.5 parts by weight to 3 parts by weight.

[0072] The liquid silicone rubber base material provided in this application includes an inhibitor, which includes, but is not limited to, ethynylcyclohexanol, 2-methyl-3-butyn-2-ol, etc., and may be one or more of them, preferably ethynylcyclohexanol. In some specific implementations, the content of the inhibitor is 0.01 parts by weight to 1 part by weight, preferably 0.05 parts by weight to 0.5 parts by weight.

[0073] This application does not impose any special limitations on the preparation method of the single-component addition-cure silicone rubber composition; simply mixing the components is sufficient. In the single-component addition-cure silicone rubber composition provided by this application, the platinum catalyst exhibits low catalytic activity at room temperature and low temperature, and will not catalyze the reaction of the base silicone rubber. It can be stored and transported at room temperature and low temperature, exhibiting good storage stability. Furthermore, the catalytic activity of the platinum catalyst does not change significantly when temporarily overheated, and it does not affect the stability of the single-component addition-cure silicone rubber composition even under temporary overheating. Moreover, the platinum catalyst exhibits good catalytic activity at high temperatures, enabling it to catalyze the reaction of the single-component addition-cure silicone rubber composition, resulting in a faster curing speed.

[0074] The platinum catalyst provided in this application has the structure of formula (I): (L1) x (L2) y (L3)z Pt is of formula (I); in formula (I), L1 is a vinyl-containing methylsiloxane ligand, L2 is a ligand containing a tertiary amine group, and L3 is a ligand containing an allyl ester of an unsaturated acid; x is 0.1~2; y is 0.1~2; z is 0.1~2; x+y+z=4. This application uses a vinyl-containing methylsiloxane, a compound containing a tertiary amine group, and an allyl ester of an unsaturated acid as ligands for Pt. The resulting platinum catalyst exhibits low catalytic activity at room temperature and low temperatures, but high catalytic activity at high temperatures when used for catalyzing hydrosilylation. It is suitable for use in the field of addition-cured liquid silicone rubber. The resulting one-component addition-cured silicone rubber has excellent room temperature storage stability and storage and transportation stability, and good curing properties at high temperatures. Experimental results show that the one-component addition-cured silicone rubber composition provided in this application is stable under room temperature and occasional overheating conditions, and the properties after curing are almost identical to the initial properties.

[0075] The following detailed description of this application is provided in conjunction with the embodiments. It should be noted that: unless otherwise specified, the conditions in the following embodiments are performed under conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, the raw materials used in the following embodiments are all from commercially available sources.

[0076] Example 1

[0077] In a four-necked flask equipped with a stirrer, condenser, heating mantle, and thermometer, 1 g of chloroplatinic acid hexahydrate, 5 g of tetramethyldivinyldisiloxane, 3.7 g of diallyl maleate, 3 g of sodium bicarbonate, and 10 g of isopropanol were added. After stirring until homogeneous, the mixture was slowly heated to 70°C. Once the orange color gradually faded, the mixture was kept at this temperature for one hour. The mixture was then cooled, filtered to remove the residue, and 60 g of α,ω-divinyl-terminated polydimethylsiloxane with a viscosity of 500 cs and 0.6 g of tetramethylethylenediamine were added. The mixture was stirred at 50°C for 3 hours, then transferred to a rotary evaporator to distill off the solvent and excess vinylsiloxane ligands, yielding 65 g of a platinum catalyst with a concentration of 5000 ppm, designated Pt1, with the structural formula (L1). x (L2) y (L3) z Pt, where L1 is tetramethyldivinyldisiloxane, L2 is tetramethylethylenediamine, L3 is diallyl maleate, x is approximately 1.5, y is approximately 1.5, and z is approximately 1.

[0078] Example 2

[0079] In a four-necked flask equipped with a stirrer, condenser, heating mantle, and thermometer, 1 g of chloroplatinic acid hexahydrate, 7 g of tetramethyldivinyldisiloxane, 2.5 g of diallyl maleate, 3 g of sodium bicarbonate, and 10 g of isopropanol were added. After stirring until homogeneous, the mixture was slowly heated to 70°C. Once the orange color gradually faded, the mixture was kept at this temperature for one hour. The mixture was then cooled, filtered to remove the residue, and 60 g of α,ω-divinyl-terminated polydimethylsiloxane with a viscosity of 500 cs and 0.33 g of 2,2'-bipiperidine were added. The mixture was stirred at 50°C for 3 hours, then transferred to a rotary evaporator to distill off the solvent and excess vinylsiloxane ligands. 65 g of a platinum catalyst with a concentration of 5000 ppm, designated as Pt2, was obtained, with the structural formula (L1). x (L2) y (L3) z Pt, where L1 is tetramethyldivinyldisiloxane, L2 is 2,2'-bipiperidine, L3 is diallyl maleate, x is approximately 2, y is approximately 1, and z is approximately 1.

[0080] Example 3

[0081] In a four-necked flask equipped with a stirrer, condenser, heating mantle, and thermometer, 1 g of chloroplatinic acid hexahydrate, 7 g of tetramethyldivinyldisiloxane, 3.7 g of diallyl maleate, 3 g of sodium bicarbonate, and 10 g of isopropanol were added. After stirring until homogeneous, the mixture was slowly heated to 70°C. Once the orange color gradually faded, the mixture was kept at this temperature for one hour. The mixture was then cooled, filtered to remove the residue, and 60 g of α,ω-divinyl-terminated polydimethylsiloxane with a viscosity of 500 cs and 0.17 g of 2,2'-bipiperidine were added. The mixture was stirred at 50°C for 3 hours, then transferred to a rotary evaporator to distill off the solvent and excess vinylsiloxane ligands. 65 g of a platinum catalyst with a concentration of 5000 ppm, designated as Pt3, was obtained, with the structural formula (L1). x (L2) y (L3) z Pt, where L1 is tetramethyldivinyldisiloxane, L2 is 2,2'-bipiperidine, L3 is diallyl maleate, x is approximately 2, y is approximately 0.5, and z is approximately 1.5.

[0082] Experimental Example 1

[0083] 70 parts by mass of α,ω-divinyl-terminated polydimethylsiloxane with a viscosity of 10000 cs and 25 parts by mass of polydimethylsiloxane with a specific surface area of ​​200 m² were added. 2A one-component addition-type silicone rubber composition was obtained by mixing 1g of fumed silica, 15 parts by mass of hexamethyldisilazane, 6 ppm of Pt catalyst, 4 parts by mass of hydrogen-containing silicone oil with a hydrogen content of 0.75 wt%, 1 part by mass of propylene oxide trimethoxysilane, and 0.1 parts by mass of ethynylcyclohexanol. The Pt catalyst was either the catalyst prepared in Examples 1-3 or a commercially available 2000 ppm Karst catalyst (Comparative Example 1).

[0084] The one-component addition-cure silicone rubber composition was stored at room temperature for 3 months and 6 months, and then at 50°C for 7 days. Its viscosity, hardness, strength, and vulcanization curve (120°C) were tested. The results are shown in Tables 1, 2, 3, and 4. Table 1 shows the initial performance parameters of the one-component addition-cure silicone rubber composition provided in this application. Table 2 shows the performance parameters of the one-component addition-cure silicone rubber composition provided in this application after 3 months of storage at room temperature. Table 3 shows the performance parameters of the one-component addition-cure silicone rubber composition provided in this application after 6 months of storage at room temperature. Table 4 shows the performance parameters of the one-component addition-cure silicone rubber composition provided in this application after 7 days of storage at 50°C.

[0085] Table 1 Initial performance parameters of the one-component addition-cure silicone rubber composition provided in this application

[0086]

[0087] Table 2 Performance parameters of the one-component addition-cure silicone rubber composition provided in this application after 3 months of storage at room temperature.

[0088]

[0089] Table 3 Performance parameters of the one-component addition-cure silicone rubber composition provided in this application after 6 months of storage at room temperature.

[0090]

[0091] Table 4 Performance parameters of the one-component addition-cure silicone rubber composition provided in this application after storage at 50°C for 7 days

[0092]

[0093] Based on the viscosity changes before and after aging, the properties of the cured sample, and the vulcanization curve, it can be seen that the one-component addition-type silicone rubber composition containing the platinum catalyst prepared in this application is stable under storage conditions at room temperature and occasional over-temperature conditions, and the properties after curing are almost the same as the initial properties. The one-component addition-type silicone rubber composition prepared by using piperidine as a catalyst with tetramethylethylenediamine as a ligand has better storage stability at low temperature.

[0094] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A platinum catalyst comprising a complex of formula (I): (L1) x (L2) y (L3) z Pt formula (I); In formula (I), L1 is tetramethyldivinyldisiloxane; L2 is 2,2'-bipiperidine; L3 is diallyl maleate; x is 0.1~2; y is 0.1~2; z is 0.1~2; x+y+z=4.

2. The platinum catalyst according to claim 1, characterized in that, x is 1.5~2; y is 0.5~1.5; z is 1~1.

5.

3. The platinum catalyst according to any one of claims 1 to 2, characterized in that, It also includes diluents; The diluent includes one or more of α,ω-divinyl-terminated polydimethylsiloxane and toluene; The content of the complex shown in formula (I) is 1000ppm to 10000ppm, calculated as platinum.

4. The method for preparing the platinum catalyst according to claim 1, comprising the following steps: 1) A mixed solution is obtained by reacting a platinum source, L1 ligand, L3 ligand, basic compound, and organic solvent. 2) The mixed solution, L2 ligand and diluent are mixed and reacted to obtain a platinum catalyst.

5. The preparation method according to claim 4, characterized in that, The platinum source is chloroplatinic acid hexahydrate; The alkaline compound is sodium bicarbonate; The organic solvent is isopropanol; The diluent includes one or more of α,ω-divinyl-terminated polydimethylsiloxane and toluene.

6. The preparation method according to claim 5, characterized in that, In step 1), the reaction temperature is 50℃~90℃ and the time is 40min~80min; In step 2), the reaction temperature is 40℃~60℃ and the time is 2h~5h.

7. A one-component addition-type silicone rubber composition comprising a liquid silicone rubber base and the platinum catalyst according to any one of claims 1 to 3.

8. The one-component addition-cure silicone rubber composition according to claim 7, characterized in that, The liquid silicone rubber base material includes: 50 to 100 parts by weight of vinyl silicone oil; 5 parts by weight to 50 parts by weight of filler; 1 to 10 parts by weight of filler modifier; 1 to 10 parts by weight of crosslinking agent; 0.1 to 5 parts by weight of adhesion promoter; Inhibitors ranging from 0.01 to 1 part by weight.

9. The one-component addition-cure silicone rubber composition according to claim 8, characterized in that, The viscosity of the vinyl silicone oil is 2000 cs to 200000 cs; The filler is fumed silica; The filler modifier is hexamethyldisilazane; The crosslinking agent is hydrogen-containing silicone oil; The adhesion promoter includes one or more of glycidoxypropyltrimethoxysilane, aminopropyltriethoxysilane and N-aminoethyl-γ-aminopropyltrimethoxysilane; The inhibitors include one or more of etynylcyclohexanol and 2-methyl-3-butyn-2-ol; The content of the platinum catalyst, calculated as platinum in the complex shown in formula (I), is 1 ppm to 30 ppm.

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