Single-component addition type organic silicon bonding glue and preparation method thereof

Abstract

The invention belongs to the technical field of organic silicon bonding adhesives, and particularly discloses a single-component addition type organic silicon bonding adhesive and a preparation method thereof.The single-component addition type organic silicon bonding adhesive is prepared from, by weight, 100 parts of vinyl silicone oil and 5-15 parts of cross-linking agent; 0.5-2 parts of a controllable catalyst, 1-2 parts of a tackifier and 10-50 parts of a reinforcing filler. The controllable catalyst is formed by compounding a platinum catalyst and an organic silicon phosphine oxide compound; the organic silicon phosphine oxide compound is prepared by reacting siloxane containing a vinyl functional group with alkane phosphine oxide; the reaction is carried out at the temperature of 60-100 DEG C in the presence of an initiator. According to the invention, the self-made controllable catalyst is applied to the silica gel, and the catalyst enables the silica gel to have good stability and long storage period at room temperature, the curing speed at high temperature is higher, and the silica gel also has long storage period.

Description

Technical Field

[0001] The invention relates to the technical field of organic silicon adhesives, and in particular to a one-component addition-type organic silicon adhesive and a preparation method thereof. Background Art

[0002] Organic silicone rubber is an elastic polymer, and its basic structure is organic siloxane polymer. Silicone rubber is different from traditional organic rubber. Its structure determines its special properties. The organic groups and inorganic groups on the polymer skeleton exist at the same time, and it has both organic and inorganic characteristics. And because the Si-O bond energy is higher than the CC bond energy of organic rubber, silicone rubber has better stability. The above advantages make silicone rubber widely used in various fields such as aerospace, military industry, construction, and electronic medical care. Organic silicone rubber can be classified by process and reaction mechanism. Among them, addition reaction type silicone rubber has developed rapidly in recent years. Addition reaction type silicone rubber is mainly composed of hydrogen silicone oil, vinyl silicone oil, catalyst, filler, and additives. The curing mechanism of addition reaction type silicone rubber is mainly the silylation reaction of carbon-carbon double bonds and silicon-hydrogen bonds catalyzed by platinum catalysts. There is no small molecule release in the reaction, and the performance is excellent, which has great development potential. At present, there are many studies on silicone oil, fillers and additives in addition type silicone, but the research progress of catalysts and inhibitors is relatively small.

[0003] At present, the catalysts used are basically platinum catalysts such as platinum-vinylsiloxane complex catalysts. Platinum catalysts have extremely high catalytic activity. Very low dosage can quickly crosslink low molecular weight polysiloxane at room temperature, which is not conducive to the construction process that requires a certain amount of time and the storage and use of single-component silicone. Therefore, inhibitors are added to adjust the curing time. There are many types of inhibitors, which can be mainly divided into the following three categories: 1. Alkynol compounds and unsaturated bond compounds such as vinyl siloxane. 2. Organic compounds containing N, P, S and other unshared electrons. 3. Heavy metal ion compounds. Most of the latter two types of compounds can form stable coordination bonds with catalysts, which can effectively reduce the activity of catalysts, but the difficulty of curing at high temperatures is significantly increased, and it is difficult to balance construction and storage. At present, the more mainstream is acetylene cyclohexanol and the like, but the melting point of acetylene cyclohexanol is slightly higher, and it may precipitate from the glue at a lower temperature, reducing the storage period or operation time of silicone, which has certain limitations. Summary of the invention

[0004] In view of the above-mentioned shortcomings, the present invention provides a one-component addition-type organic silicon adhesive and a preparation method thereof. The present invention uses a self-made controllable catalyst (a new platinum catalyst) in the silicone rubber, which can make the silicone rubber have good stability and a long storage period at room temperature, and can efficiently catalyze the hydrosilylation reaction at a certain temperature, so that the one-component silicone rubber can be cured quickly. The phosphine oxide compound used in the controllable catalyst is more stable than the disclosed organic phosphine ligand inhibitor, has a faster curing speed at high temperature, and also has a long storage period.

[0005] In order to achieve the above object, the present invention provides a one-component addition-type organic silicone adhesive, wherein the silicone rubber is composed of the following raw materials in parts by weight:

[0006]

[0007] Wherein, the controllable catalyst is compounded by a platinum catalyst and an organic silicon phosphine compound;

[0008] The organic silicon phosphine oxide compound is prepared by reacting siloxane containing vinyl functional groups with alkane phosphine oxide; the reaction is carried out under the conditions of 60-100° C. and in the presence of an initiator.

[0009] Preferably, the molar ratio of the vinyl functional group-containing siloxane to the alkane phosphine oxide is 1:1 to 2;

[0010] Preferably, the amount of the initiator added is 0.1-1 wt.% of the total mass of the vinyl functional siloxane and the alkane phosphine oxide.

[0011] According to one aspect of the present invention, the structural formula of the siloxane containing a vinyl functional group is as shown in Formula I, the structural formula of the alkane phosphine oxide is as shown in Formula II, and the organic silicon phosphine oxide compound is as shown in Formula III:

[0012]

[0013]

[0014] Wherein, in Formula I and Formula III, n is 1-5, and R1 is one of methyl, ethyl, and vinyl;

[0015] In formula II, R2 is an alkyl group or a phenyl group.

[0016] According to one aspect of the present invention, the siloxane containing vinyl functional groups is vinyl terminated polydimethylsiloxane.

[0017] According to one aspect of the present invention, the viscosity of the vinyl silicone oil is 100-2000 mPa·s, and the vinyl content of the vinyl silicone oil is 0.1-0.5 wt.%.

[0018] According to one aspect of the present invention, the cross-linking agent is hydrogen-containing silicone oil, the hydrogen-containing silicone oil is a branched hydrogen-containing silicone oil, and the hydrogen content in the hydrogen-containing silicone oil is 0.1-1.0 wt.%.

[0019] According to one aspect of the present invention, the catalyst platinum content in the controllable catalyst is 1000-5000 ppm.

[0020] According to one aspect of the present invention, the tackifier is an organosilicon tackifier; the organosilicon tackifier is prepared by a hydrosilylation reaction of tetramethyltetravinylcyclotetrasiloxane and ethyl acrylate.

[0021] It should be noted that the conditions of the above hydrosilylation reaction are: platinum catalyst, stirring at 60° C. for 6 hours under nitrogen protection. After the above hydrosilylation reaction is completed, low-boiling substances are removed by vacuum distillation to obtain an organosilicon tackifier.

[0022] According to one aspect of the present invention, the reinforcing filler is one or more of fumed silica, precipitated silica, silicone resin, calcium carbonate, silicon powder, alumina, silicon carbide, and silicon nitride.

[0023] Based on the same inventive concept, the present invention also provides a method for preparing the above-mentioned one-component addition-type silicone adhesive, comprising the following steps:

[0024] S1, adding siloxane containing vinyl functional groups and alkane phosphine oxide into solvent A in a specific ratio, adding an initiator, reacting at 60-100° C. for 4-12 hours, and then distilling under reduced pressure to obtain an organic silicon phosphine compound;

[0025] S2, adding the platinum catalyst and the organosilicon phosphine compound to solvent B, stirring at room temperature for 4-12 hours, and then distilling under reduced pressure to obtain a controllable catalyst;

[0026] S3, preparing a base material by kneading the reinforcing filler powder and vinyl silicone oil, and pre-treating the base material by a silane coupling agent or hexamethyldisilazane to obtain a vinyl-based adhesive;

[0027] Preferably, the amount of the silane coupling agent or hexamethyldisilazane added is 0.1-1 wt. % of the total mass of vinylpentamethyldisiloxane and dimethylphosphine oxide.

[0028] S4. Add vinyl-based adhesive, cross-linking agent, controllable catalyst and tackifier into the planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a single-component addition-type silicone adhesive.

[0029] According to one aspect of the present invention, in step S1, the solvent A is any one of toluene, xylene, tetrahydrofuran, and isopropanol; the initiator is any one of dibenzoyl peroxide, tert-butyl perbenzoate, diisopropyl peroxide, and di-tert-butyl peroxide; in step S2, the solvent B is any one of toluene, xylene, tetrahydrofuran, and isopropanol; in step S3, the silane coupling agent is at least one of γ-glycidyloxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and γ-aminopropyltriethoxysilane.

[0030] Beneficial effects of the present invention:

[0031] (1) The present invention prepares a controllable catalyst (a new platinum catalyst) and applies it to silica gel. The catalyst can make silica gel have good stability and long storage period at room temperature, and can efficiently catalyze the hydrosilylation reaction at a certain temperature, so that the single-component silicone rubber can be cured quickly.

[0032] (2) The phosphine oxide compound used as the controllable catalyst in the one-component addition-type silicone adhesive of the present invention is more stable than the disclosed organophosphine ligand inhibitor, has a faster curing speed at high temperature, and also has a long shelf life.

[0033] (3) The one-component addition-type silicone rubber solution of the present invention can have a good storage period at room temperature and can be quickly cured under high temperature conditions.

[0034] (4) Compared with the inhibitors used in traditional single-component silica gel, the catalytic system used in the present invention has an organic silicon structure, has good compatibility with the organic silica gel system, is not easy to precipitate from the silica gel system, and the organic phosphine oxide structure in the catalytic system has good chemical stability. This structure can also improve the flame retardant properties of silica gel to a certain extent. DETAILED DESCRIPTION

[0035] To make the present invention easier to understand, the present invention is further described below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention. Unless otherwise defined, the professional terms used below are consistent with the meanings understood by professional and technical personnel in the field; unless otherwise specified, the raw materials and reagents involved in this article can be purchased from the market or prepared by known methods.

[0036] Example 1

[0037] A method for preparing a one-component addition-type organic silicon adhesive comprises the following steps:

[0038] S1. Vinyl pentamethyldisiloxane and dimethylphosphine oxide (molar ratio 1:1) are added to toluene, and dibenzoyl peroxide (1 wt.%) is added, and the mixture is reacted at 80° C. for 12 h, and then the solvent and low-boiling substances are removed by reduced pressure distillation to obtain an organosilicon phosphine oxide compound as shown in Formula IV;

[0039]

[0040] S2, adding a platinum-vinylsiloxane complex catalyst and the organosilicon phosphine compound (molar ratio of 1:1) to isopropanol, stirring at room temperature for 12 hours, and then distilling under reduced pressure to obtain a controllable catalyst;

[0041] S3, preparing a base material by kneading 20 parts of fumed silica powder and 100 parts of vinyl silicone oil, and pre-treating it with hexamethyldisilazane (10 wt.%) to obtain a vinyl-based adhesive;

[0042] S4. Add the above-mentioned vinyl-based adhesive, 5 parts of hydrogenated silicone oil, 0.5 parts of controllable catalyst and 1 part of tackifier into the planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a one-component addition-type silicone adhesive.

[0043] Take some samples of the prepared silica gel for high temperature curing test and record the data. Use a sealed bottle to store the remaining silica gel. Observe the curing and thickening of the samples at a fixed time frequency.

[0044] Example 2

[0045] A method for preparing a one-component addition-type organic silicon adhesive comprises the following steps:

[0046] S1. Add divinyltetramethyldisiloxane and dimethylphosphine oxide (molar ratio 1:1) to toluene, and add dibenzoyl peroxide (1wt.%), react at 80°C for 12h, and then remove the solvent and low-boiling substances by reduced pressure distillation to obtain an organosilicon phosphine oxide compound as shown in Formula V;

[0047]

[0048] S2, adding a platinum-vinylsiloxane complex catalyst and the organosilicon phosphine compound (molar ratio of 1:1) to isopropanol, stirring at room temperature for 12 hours, and then distilling under reduced pressure to obtain a controllable catalyst;

[0049] S3, preparing a base material by kneading 20 parts of fumed silica powder and 100 parts of vinyl silicone oil, and pre-treating it with hexamethyldisilazane (10 wt.%) to obtain a vinyl-based adhesive;

[0050] S4. Add vinyl-based glue, 5 parts of hydrogenated silicone oil, 0.5 parts of controllable catalyst and 1 part of tackifier into the planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a single-component addition-type silicone adhesive.

[0051] Take some samples of the prepared silica gel for high temperature curing test and record the data. Use a sealed bottle to store the remaining silica gel. Observe the curing and thickening of the samples at a fixed time frequency.

[0052] Example 3

[0053] A method for preparing a one-component addition-type organic silicon adhesive comprises the following steps:

[0054] S1. Add divinyltetramethyldisiloxane and dimethylphosphine oxide (molar ratio 1:2) to toluene, and add dibenzoyl peroxide (1wt.%), react at 80°C for 12h, and then remove the solvent and low boiling points by reduced pressure distillation to obtain an organosilicon phosphine oxide compound as shown in Formula VI;

[0055]

[0056] S2, adding a platinum-vinylsiloxane complex catalyst and the organosilicon phosphine compound (molar ratio of 1:1) to isopropanol, stirring at room temperature for 12 hours, and then distilling under reduced pressure to obtain a controllable catalyst;

[0057] S3, preparing a base material by kneading 20 parts of fumed silica powder and 100 parts of vinyl silicone oil, and pre-treating it with hexamethyldisilazane (10 wt.%) to obtain a vinyl-based adhesive;

[0058] S4. Add vinyl-based glue, 5 parts of hydrogenated silicone oil, 0.5 parts of controllable catalyst and 1 part of tackifier into the planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a single-component addition-type silicone adhesive.

[0059] Take some samples of the prepared silica gel for high temperature curing test and record the data. Use a sealed bottle to store the remaining silica gel. Observe the curing and thickening of the samples at a fixed time frequency.

[0060] Example 4

[0061] A method for preparing a one-component addition-type organic silicon adhesive comprises the following steps:

[0062] S1, adding vinyl-terminated polydimethylsiloxane and dimethylphosphine oxide (molar ratio 1:1) to toluene, and adding dibenzoyl peroxide (1wt.%), reacting at 80°C for 12h, and then removing the solvent and low-boiling substances by reduced pressure distillation to obtain an organic silicon phosphine oxide compound, as shown in formula VII;

[0063]

[0064] S2, adding a platinum-vinylsiloxane complex catalyst and the organosilicon phosphine compound (molar ratio of 1:1) to isopropanol, stirring at room temperature for 12 hours, and then distilling under reduced pressure to obtain a controllable catalyst;

[0065] S3, preparing a base material by kneading 20 parts of fumed silica powder and 100 parts of vinyl silicone oil, and pre-treating it with hexamethyldisilazane (10 wt.%) to obtain a vinyl-based adhesive;

[0066] S4. Add vinyl-based glue, 5 parts of hydrogenated silicone oil, 0.5 parts of controllable catalyst and 1 part of tackifier into the planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a single-component addition-type silicone adhesive.

[0067] Take some samples of the prepared silica gel for high temperature curing test and record the data. Use a sealed bottle to store the remaining silica gel. Observe the curing and thickening of the samples at a fixed time frequency.

[0068] Example 5

[0069] A method for preparing a one-component addition-type organic silicon adhesive comprises the following steps:

[0070] S1, adding vinyl-terminated polydimethylsiloxane and dimethylphosphine oxide (molar ratio 1:2) to toluene, and adding dibenzoyl peroxide (1wt.%), reacting at 80°C for 12h, and then removing the solvent and low-boiling substances by reduced pressure distillation to obtain an organic silicon phosphine oxide compound, as shown in Formula VIII;

[0071]

[0072] S2, adding a platinum-vinylsiloxane complex catalyst and the organosilicon phosphine compound (molar ratio of 1:1) to isopropanol, stirring at room temperature for 12 hours, and then distilling under reduced pressure to obtain a controllable catalyst;

[0073] S3, preparing a base material by kneading 20 parts of fumed silica powder and 100 parts of vinyl silicone oil, and pre-treating it with hexamethyldisilazane (10 wt.%) to obtain a vinyl-based adhesive;

[0074] S4. Add vinyl-based glue, 5 parts of hydrogenated silicone oil, 0.5 parts of controllable catalyst and 1 part of tackifier into the planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a single-component addition-type silicone adhesive.

[0075] Take some samples of the prepared silica gel for high temperature curing test and record the data. Use a sealed bottle to store the remaining silica gel. Observe the curing and thickening of the samples at a fixed time frequency.

[0076] Comparative Example 1

[0077] A method for preparing a one-component addition-type organic silicon adhesive comprises the following steps:

[0078] S1, 20 parts of fumed silica powder and 100 parts of vinyl silicone oil are prepared into a base material by a kneader, and pre-treated with hexamethyldisilazane (10wt.%) to obtain a vinyl-based adhesive;

[0079] S2. Add the above-mentioned vinyl-based adhesive, 5 parts of hydrogenated silicone oil, 0.5 parts of (acetylene cyclohexanol and platinum-vinylsiloxane complex catalyst (molar ratio 1:1)), and 1 part of thickener into a planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a one-component addition-type silicone adhesive.

[0080] Except for the different catalyst and inhibitor systems, the platinum content, the amounts of other components, the storage temperature and environment, etc. in this comparative example are consistent with those in Example 1.

[0081] Take some samples of the prepared silica gel for high temperature curing test and record the data. Use a sealed bottle to store the remaining silica gel. Observe the curing and thickening of the samples at a fixed time frequency.

[0082] Comparative Example 2

[0083] A method for preparing a one-component addition-type organic silicon adhesive comprises the following steps:

[0084] S1, 20 parts of fumed silica powder and 100 parts of vinyl silicone oil are prepared into a base material by a kneader, and pre-treated with hexamethyldisilazane (10wt.%) to obtain a vinyl-based adhesive;

[0085] S2. Add vinyl-based glue, 5 parts of hydrogenated silicone oil, 0.5 parts of (dimethyl maleate and platinum-vinylsiloxane complex catalyst (molar ratio 1:1)), and a tackifier into a planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a one-component addition-type silicone adhesive.

[0086] Except for the different catalyst and inhibitor systems, the platinum content, the amounts of other components, the storage temperature and environment, etc. in this comparative example are consistent with those in Example 1.

[0087] Take some samples of the prepared silica gel for high temperature curing test and record the data. Use a sealed bottle to store the remaining silica gel. Observe the curing and thickening of the samples at a fixed time frequency.

[0088] Comparative Example 3

[0089] A method for preparing a one-component addition-type organic silicon adhesive comprises the following steps:

[0090] S1, preparing a base material by kneading 20 parts of fumed silica powder and 100 parts of vinyl silicone oil, and pre-treating it with hexamethyldisilazane to obtain a vinyl-based adhesive;

[0091] S2. Add vinyl-based glue, 5 parts of hydrogenated silicone oil, 0.5 parts of (vinyl pentamethyldisiloxane and platinum-vinylsiloxane complex (molar ratio 1:1)), and 1 part of thickener into the planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a one-component addition-type silicone adhesive.

[0092] Except for the different catalyst and inhibitor systems, the platinum content, the amounts of other components, the storage temperature and environment, etc. in this comparative example are consistent with those in Example 1.

[0093] Take some samples of the prepared silica gel for high temperature curing test and record the data. Use a sealed bottle to store the remaining silica gel. Observe the curing and thickening of the samples at a fixed time frequency.

[0094] Comparative Example 4

[0095] A method for preparing a one-component addition-type organic silicon adhesive comprises the following steps:

[0096] S1, 20 parts of fumed silica powder and 100 parts of vinyl silicone oil are prepared into a base material by a kneader, and pre-treated with hexamethyldisilazane (10wt.%) to obtain a vinyl-based adhesive;

[0097] S2. Add vinyl-based glue, 5 parts of hydrogenated silicone oil, 0.5 parts of (dimethylphosphine oxide and platinum-vinylsiloxane complex (molar ratio 1:1)), and 1 part of tackifier into the planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a one-component addition-type silicone adhesive.

[0098] Except for the different catalyst and inhibitor systems, the platinum content, the amounts of other components, the storage temperature and environment, etc. in this comparative example are consistent with those in Example 1.

[0099] Take some samples of the prepared silica gel for high temperature curing test and record the data. Use a sealed bottle to store the remaining silica gel. Observe the curing and thickening of the samples at a fixed time frequency.

[0100] Performance testing and result analysis:

[0101] Storage performance test of the silica gel prepared in Examples 1 to 5 and Comparative Examples 1 to 4: Examples 1 to 5 and Comparative Examples 1 to 4 were placed in the same environment to test their high temperature curing speed and storage period of normal packaging. The room temperature test was measured as its initial curing time (gel appeared), and the storage condition for the room temperature test was airtight. The high temperature curing test time is the time required for the organic silica gel to completely cure, and the results are shown in Table 1 below:

[0102] Table 1:

[0103]

[0104] As can be seen from Table 1, the storage period of Examples 1 to 5 is significantly longer than that of Comparative Examples 1 and 2 using conventional inhibitors, and the curing speed at high temperature is similar, indicating that the controllable catalyst of the present invention can ensure the high temperature curing speed while having a longer storage period compared to conventional inhibitors. In fact, groups with coordination ability have more or less inhibitory effects on platinum catalysts. In the 5 embodiments of the present application, the storage time of Example 1 is relatively short because it only has a single-ended phosphine oxide structure and does not contain a vinyl group, and the inhibitory ability is relatively weak. The controllable catalyst of the double-ended phosphine oxide structure has stronger inhibitory ability than the single-ended one, and the storage period will be longer, but it will slightly affect the curing speed at high temperature. For Example 2 and Example 4, due to the presence of vinyl groups, they can participate in the hydrosilylation reaction in the silica gel component and become part of the silica gel cross-linking structure, so the product as a whole is relatively more stable, and the product is not easily affected by external influences after curing into a gel, resulting in exudation. Both the phosphine oxide structure and the vinyl group can inhibit under normal storage. Although Comparative Examples 1, 2 and 3 have fast curing speed at high temperature, their storage period is short, and Comparative Examples 1 and 2 do not participate in the silicone curing reaction and may ooze out. Although Comparative Example 4 is an organic silicon component and vinyl has a certain inhibitory effect, the actual effect is obviously not as good as that of the embodiment. Although Comparative Example 5 has a good storage period, the simple phosphine oxide structure is not compatible with the silicone system and is easily affected by external factors and oozes out.

[0105] The controllable catalyst of the five embodiments of the present invention is relatively effective in embodiment 4, which can ensure a good storage period under the curing requirements of normal construction, and the inhibitor (organic silicon phosphine compound) can participate in the silicone curing reaction, and will not release substances at high temperature to affect the environment. The silica gel prepared by the embodiment has good tensile properties and bonding strength, excellent construction performance and excellent storage period. The inhibition principle of the inhibitor (organic silicon phosphine compound) of the present application is to coordinate the group with unshared electrons with the empty electron orbit, thereby limiting the coordination catalytic activity of the platinum catalyst at room temperature, and the difficulty of the coordination bond breaking at high temperature becomes the key to the high temperature curing speed. The coordination ability of the phosphine structure mainly comes from oxygen, which is slightly weaker than the organic phosphine structure, so that the coordination catalytic activity can be restored faster at high temperature, so that it can be cured quickly.

[0106] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A one-component addition-type silicone adhesive, characterized in that: The silicone rubber is composed of the following raw materials in parts by weight: Wherein, the controllable catalyst is compounded by a platinum catalyst and an organic silicon phosphine compound; The organic silicon phosphine oxide compound is prepared by reacting siloxane containing vinyl functional groups with alkane phosphine oxide; the reaction is carried out under the conditions of 60-100° C. and in the presence of an initiator.

2. The one-component addition-type silicone adhesive according to claim 1, characterized in that: The structural formula of the siloxane containing a vinyl functional group is as shown in Formula I, the structural formula of the alkane phosphine oxide is as shown in Formula II, and the organic silicon phosphine oxide compound is as shown in Formula III: Wherein, in Formula I and Formula III, n is 1-5, and R1 is one of methyl, ethyl, and vinyl; In formula II, R2 is an alkyl group or a phenyl group.

3. The one-component addition-type silicone adhesive according to claim 1, characterized in that: The siloxane containing vinyl functional groups is vinyl-terminated polydimethylsiloxane.

4. The one-component addition-type silicone adhesive according to claim 1, characterized in that: The viscosity of the vinyl silicone oil is 100-2000 mPa·s, and the vinyl content of the vinyl silicone oil is 0.1-0.5 wt.%.

5. The one-component addition-type silicone adhesive according to claim 1, characterized in that: The cross-linking agent is hydrogen-containing silicone oil, which is a branched hydrogen-containing silicone oil. The hydrogen content in the hydrogen-containing silicone oil is 0.1-1.0 wt.%.

6. The one-component addition-type silicone adhesive according to claim 1, characterized in that: The catalyst platinum content in the controllable catalyst is 1000-5000 ppm.

7. The one-component addition-type silicone adhesive according to claim 1, characterized in that: The tackifier is an organic silicon tackifier; the organic silicon tackifier is prepared by a hydrosilylation reaction of tetramethyltetravinylcyclotetrasiloxane and ethyl acrylate.

8. The one-component addition-type silicone adhesive according to claim 1, characterized in that: The reinforcing filler is one or more of fumed silica, precipitated silica, silicone resin, calcium carbonate, silicon powder, aluminum oxide, silicon carbide, and silicon nitride.

9. A method for preparing a one-component addition-type silicone adhesive as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1, adding siloxane containing vinyl functional groups and alkane phosphine oxide into solvent A in a specific ratio, adding an initiator, reacting at 60-100° C. for 4-12 hours, and then distilling under reduced pressure to obtain an organic silicon phosphine compound; S2, adding the platinum catalyst and the organosilicon phosphine compound to solvent B, stirring at room temperature for 4-12 hours, and then distilling under reduced pressure to obtain a controllable catalyst; S3, preparing a base material by kneading the reinforcing filler powder and vinyl silicone oil, and pre-treating the base material by a silane coupling agent or hexamethyldisilazane to obtain a vinyl-based adhesive; S4. Add vinyl-based adhesive, cross-linking agent, controllable catalyst and tackifier into the planetary machine in sequence, and stir evenly under a vacuum degree of 0.1 MPa to obtain a single-component addition-type silicone adhesive.

10. The preparation method according to claim 9, characterized in that: In step S1, the solvent A is any one of toluene, xylene, tetrahydrofuran, and isopropanol; the initiator is any one of dibenzoyl peroxide, tert-butyl perbenzoate, diisopropyl peroxide, and di-tert-butyl peroxide; in step S2, the solvent B is any one of toluene, xylene, tetrahydrofuran, and isopropanol; in step S3, the silane coupling agent is at least one of γ-glycidyloxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and γ-aminopropyltriethoxysilane.

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