Self-adhesive mold transfer printing silicone and preparation method thereof

Abstract

This invention belongs to the field of silicone technology and discloses a self-adhesive mold transfer silicone and its preparation method. The silicone is mainly composed of component A and component B mixed in a mass ratio of 10:1. Component A includes 100 parts of divinyl-terminated polydimethylsiloxane, 25-35 parts of silica, 2-5 parts of tackifier, and 0.1-0.5 parts of platinum catalyst. Component B includes 2-4 parts of hydrogen-containing silicone oil and 0.15-0.2 parts of inhibitor. This invention, through precise proportioning and complementary functions of its components, retains the inherent advantages of addition-cure silicone rubber while specifically solving technical problems such as poor self-adhesion, low mold forming accuracy, insufficient heat resistance during transfer, and cumbersome processing of traditional transfer silicone. Furthermore, the formulation system and preparation method are simple, the raw materials are highly versatile, and it has the advantages of easy industrial production, excellent user experience, and high adaptability for transfer applications.

Description

Technical Field

[0001] This invention belongs to the field of silicone technology, specifically relating to a self-adhesive mold heat transfer silicone and its preparation method. Background Technology

[0002] In the mold transfer process, silicone is the core bonding material, and its performance directly affects the flatness, adhesion, and lifespan of the transferred product. Currently, conventional mold transfer silicone commonly suffers from insufficient self-adhesion. The current manufacturing method typically involves first coating a separator layer onto the surface of the hot melt adhesive film for pretreatment, then injecting the mold silicone into the mold. The surface of the mold silicone then adheres to the middle separator layer of the hot melt adhesive film. After the mold silicone cures, a silicone mold for transfer is obtained. However, this process requires a secondary alignment and bonding, which is prone to misalignment. The middle separator layer formed during pretreatment has a shelf life of one to six months, requiring repeated pretreatment and mold-making operations. Therefore, it is necessary to develop silicone materials with excellent self-adhesion and durability to eliminate the surface coating separator pretreatment step of the hot melt adhesive film, thereby reducing production difficulty and cost, and improving production efficiency.

[0003] Furthermore, existing heat transfer silicone preparation processes suffer from problems such as poor storage stability in single-component systems and complex formulations in two-component systems. Single-catalyst methods also suffer from low catalytic efficiency, poor compatibility, or high cost, leading to poor compatibility between the tackifier and the silicone substrate, or tackifier precipitation, thus affecting performance. Additionally, when self-adhesiveness is required, the temperature resistance of the transfer silicone deteriorates, and its release properties are poor, resulting in poor compatibility with various transfer silicone molds. Therefore, developing a silicone material with excellent self-adhesiveness, stable mechanical properties, controllable curing, convenient storage, and suitability for mold heat transfer processes is a current technical problem to be solved in this field. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a self-adhesive mold transfer silicone and its preparation method.

[0005] The technical solution adopted by the present invention to achieve the above objectives is as follows: A self-adhesive mold transfer silicone is made by mixing component A and component B in a mass ratio of 10:1, wherein: Component A consists of the following components in parts by weight: 100 parts of divinyl-terminated polydimethylsiloxane, 25-35 parts of silica, 2-5 parts of tackifier, and 0.1-0.5 parts of platinum catalyst; Component B consists of the following components in parts by weight: 2-4 parts of hydrogen-containing silicone oil, 0.15-0.2 parts of inhibitor; The dual-terminated vinyl polydimethylsiloxane is ViMe2Si(Me2SiO). n SiMe2Vi, with a viscosity of 10,000 mPa·s to 20,000 mPa·s; The platinum catalyst is a mixture of isopropanol chloroplatinate solution, tetrahydrofuran chloroplatinate solution, and a platinum complex coordinated with methyl vinyl polysiloxane in a mass ratio of 2:1:1. The tackifier is a mixture of epoxy-based hydrocarbon-modified silicone oil tackifier and thermoplastic polyurethane tackifier in a mass ratio of 2:1.

[0006] It should be further noted that the silica is fumed silica produced by hydrophobic process, with a specific surface area of ​​200~300m² / g.

[0007] Furthermore, the inhibitor is selected from one or a combination of two of methylbutynol, ethynylcyclohexanol, phenylbutynol, and propylbutynol.

[0008] Furthermore, the hydrogen-containing silicone oil is a side-chain hydrogen-containing polydimethylsiloxane with a hydrogen content of 0.1% to 0.3% and a viscosity of 50 to 200 mPa·s.

[0009] Furthermore, the epoxy value of the epoxy-based hydrocarbon-modified silicone oil tackifier is 0.1~0.3 mol / 100g, and the hydrocarbon group is C3~C8 alkyl.

[0010] Furthermore, in the platinum catalyst, the platinum content of the isopropanol chloroplatinate solution is 0.5%~2%, the platinum content of the tetrahydrofuran chloroplatinate solution is 0.5%~2%, and the platinum content of the platinum complex coordinated with methyl vinyl polysiloxane is 1%~5%.

[0011] The preparation method of the self-adhesive mold heat transfer silicone is carried out through the following steps: S1. Preparation of component A: ① Add 100 parts by weight of divinyl-terminated polydimethylsiloxane and 25-35 parts by weight of silica to a kneader and knead for 30-40 minutes at a temperature of 40-50℃ and a speed of 30-50 r / min to obtain a homogeneous silicone oil-silica composite. ② The silicone oil-fumed silica composite was transferred to a planetary mixer, and 0.1-0.5 parts by weight of platinum catalyst and 2-5 parts by weight of thickener were added. The mixture was stirred for 30-40 minutes at a temperature of 40-50℃ and a speed of 100-200 r / min. Then, the mixture was degassed for 20-30 minutes at a vacuum of -0.09 to -0.095 MPa and a temperature of 50-60℃. The mixture was then cooled to room temperature to obtain component A. S2. Preparation of component B: Add 2-4 parts by weight of hydrogen-containing silicone oil and 0.15-0.2 parts by weight of inhibitor to a disperser and disperse for 15-20 minutes at a speed of 500-800 r / min until homogeneous and transparent to obtain component B; S3. Finished Product Preparation: Mix component A and component B at a mass ratio of 10:1, and stir for 5 to 10 minutes at a speed of 300 to 500 r / min until the mixture is homogeneous to obtain self-adhesive mold transfer silicone.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Compared to the traditional process of pre-treating the mold / substrate surface with heat transfer silicone, this formula can be directly molded and used, greatly simplifying the preparation steps of mold heat transfer silicone and improving heat transfer production efficiency. Second, the present invention adopts a composite tackifier system and a composite platinum catalyst system, which not only ensures good compatibility between the tackifier and the silicone substrate and avoids the precipitation of the tackifier, but also significantly improves the self-adhesion of the silicone, which can achieve tight adhesion between the silicone and the mold and the substrate to be heated, effectively solving the problem of easy separation and displacement during the existing silicone heat transfer, and improving the success rate of transfer printing. Third, this invention optimizes the precise proportions and complementary functions of the components. It uses double-ended vinyl polydimethylsiloxane as the base adhesive, combined with fumed silica for reinforcement, and a composite platinum catalyst to initiate cross-linking. Specific inhibitors regulate the curing speed, resulting in silicone that not only has excellent self-adhesion but also superior mechanical properties, temperature resistance, and molding stability. It is not easily damaged or aged, thus extending its service life. It is suitable for mold transfer requirements under different working conditions, retaining the inherent advantages of addition-cure silicone rubber while also possessing good self-adhesion, demolding properties, and durability. Detailed Implementation

[0013] To further understand the invention's content, features, and effects, the following embodiments are provided.

[0014] Example 1 Ingredients for this embodiment: Component A: 100 parts of divinyl-terminated polydimethylsiloxane, 30 parts of fumed silica, 0.3 parts of platinum catalyst (0.5% Pt in isopropanol chloroplatinate solution + 0.5% Pt in tetrahydrofuran chloroplatinate solution + 1% Pt in methyl vinyl polysiloxane platinum complex = 2:1:1), and 3 parts of tackifier (0.2 mol / 100g of epoxy-modified silicone oil + 2:1 thermoplastic polyurethane tackifier). Component B: 3 parts of hydrogen-containing silicone oil (0.2% hydrogen content, 100 mPa·s), 0.18 parts of ethynylcyclohexanol; Preparation process: S1. Preparation of component A: ① Add 100 parts of double-ended vinyl polydimethylsiloxane and 30 parts of silica to a kneader and knead for 35 minutes at a temperature of 45℃ and a speed of 40r / min to obtain a homogeneous silicone oil-silica composite. ② The silicone oil-fumed silica composite was transferred to a planetary mixer, and 0.3 parts of platinum catalyst and 3 parts of thickener were added. The mixture was stirred for 35 minutes at 45°C and 150 r / min. Then, the mixture was degassed for 25 minutes at a vacuum of -0.092 MPa and 55°C. After cooling to room temperature, component A was obtained. S2. Preparation of component B: Add 3 parts of hydrogen-containing silicone oil and 0.18 parts of inhibitor to a disperser and disperse for 18 minutes at a speed of 600 r / min until homogeneous and transparent to obtain component B; S3. Finished Product Preparation: Mix component A and component B at a mass ratio of 10:1, stir at 400 r / min for 10 minutes, and after mixing evenly, you can get the self-adhesive mold transfer silicone.

[0015] Test results: Shore A hardness 30, tensile strength 3.8MPa, tear strength 15kN / m, self-adhesion (does not fall off after suspending a 1.5kg weight for 30 minutes), no deformation after baking at 200℃ for 4 hours, and no residue after repeated heat treatments 500 times.

[0016] Example 2 Ingredients for this embodiment: Component A: 100 parts of divinyl-terminated polydimethylsiloxane, 25 parts of fumed silica, 0.1 parts of platinum catalyst (0.5% Pt in isopropanol chloroplatinate solution + 0.5% Pt in tetrahydrofuran chloroplatinate solution + 1% Pt in methyl vinyl polysiloxane platinum complex = 2:1:1), and 2 parts of tackifier (0.2 mol / 100g of epoxy-modified silicone oil + 2:1 thermoplastic polyurethane tackifier). Component B: 3 parts of hydrogen-containing silicone oil (0.2% hydrogen content, 100 mPa·s) and 0.18 parts of ethynylcyclohexanol.

[0017] S1. Preparation of component A: ① Add 100 parts of double-ended vinyl polydimethylsiloxane and 25 parts of silica to a kneader and knead for 35 minutes at a temperature of 45℃ and a speed of 40r / min to obtain a homogeneous silicone oil-silica composite. ② The silicone oil-fumed silica composite was transferred to a planetary mixer, 0.1 parts of platinum catalyst and 2 parts of thickener were added, and the mixture was mixed for 35 minutes at 45°C and 150 r / min. Then, the mixture was degassed for 25 minutes at a vacuum of -0.092 MPa and a temperature of 55°C, and cooled to room temperature to obtain component A. S2. Preparation of component B: Add 3 parts of hydrogen-containing silicone oil and 0.18 parts of inhibitor to a disperser and disperse for 18 minutes at a speed of 600 r / min until homogeneous and transparent to obtain component B; S3. Finished Product Preparation: Mix component A and component B at a mass ratio of 10:1, stir at 400 r / min for 10 minutes, and after mixing evenly, you can get the self-adhesive mold transfer silicone.

[0018] Test results: Shore A hardness 22, tensile strength 3.1MPa, tear strength 13kN / m, self-adhesion (does not fall off after suspending a 1kg weight for 30 minutes), no deformation after baking at 200℃ for 4 hours, and no residue after repeated heat treatments 500 times.

[0019] Example 3 Ingredients for this embodiment: Component A: 100 parts of divinyl-terminated polydimethylsiloxane, 35 parts of fumed silica, 0.5 parts of platinum catalyst (0.5% Pt in isopropanol chloroplatinate solution + 0.5% Pt in tetrahydrofuran chloroplatinate solution + 1% Pt in methyl vinyl polysiloxane platinum complex = 2:1:1), and 5 parts of tackifier (0.2 mol / 100g of epoxy-modified silicone oil + 2:1 thermoplastic polyurethane tackifier). Component B: 3 parts of hydrogen-containing silicone oil (0.2% hydrogen content, 100 mPa·s) and 0.18 parts of ethynylcyclohexanol.

[0020] S1. Preparation of component A: ① Add 100 parts of double-ended vinyl polydimethylsiloxane and 35 parts of silica to a kneader and knead for 35 minutes at a temperature of 45℃ and a speed of 40r / min to obtain a homogeneous silicone oil-silica composite. ② The silicone oil-fumed silica composite was transferred to a planetary mixer, 0.5 parts of platinum catalyst and 5 parts of thickener were added, and the mixture was mixed for 35 minutes at 45°C and 150 r / min. Then, the mixture was degassed for 25 minutes at a vacuum of -0.092 MPa and 55°C, and cooled to room temperature to obtain component A. S2. Preparation of component B: Add 3 parts of hydrogen-containing silicone oil and 0.18 parts of inhibitor to a disperser and disperse for 18 minutes at a speed of 600 r / min until homogeneous and transparent to obtain component B; S3. Finished Product Preparation: Mix component A and component B at a mass ratio of 10:1, stir at 400 r / min for 10 minutes, and after mixing evenly, you can get the self-adhesive mold transfer silicone.

[0021] Test results: Shore A hardness 38 degrees, tensile strength 4.2MPa, tear strength 15kN / m, self-adhesion (does not fall off after suspending a 2kg weight for 30 minutes), no deformation after baking at 200℃ for 4 hours, and no residue after repeated heat treatments 500 times.

[0022] Comparative Example 1 Component A: 100 parts of divinyl-terminated polydimethylsiloxane, 30 parts of fumed silica, 0.3 parts of platinum catalyst (1% Pt platinum complex of methyl vinyl polysiloxane), and 3 parts of tackifier (0.2 mol / 100 g epoxy hydrocarbon modified silicone oil + 2:1 thermoplastic polyurethane tackifier). Component B: 3 parts of hydrogen-containing silicone oil (0.2% hydrogen content, 100 mPa·s), 0.18 parts of ethynylcyclohexanol; Preparation process: S1. Preparation of component A: ① Add 100 parts of double-ended vinyl polydimethylsiloxane and 30 parts of silica to a kneader and knead for 35 minutes at a temperature of 45℃ and a speed of 40r / min to obtain a homogeneous silicone oil-silica composite. ② The silicone oil-fumed silica composite was transferred to a planetary mixer, and 0.3 parts of platinum catalyst and 3 parts of thickener were added. The mixture was stirred for 35 minutes at 45°C and 150 r / min. Then, the mixture was degassed for 25 minutes at a vacuum of -0.092 MPa and 55°C. After cooling to room temperature, component A was obtained. S2. Preparation of component B: Add 3 parts of hydrogen-containing silicone oil and 0.18 parts of inhibitor to a disperser and disperse for 18 minutes at a speed of 600 r / min until homogeneous and transparent to obtain component B; S3. Finished Product Preparation: Mix component A and component B at a mass ratio of 10:1, stir at 400 r / min for 10 minutes, and after mixing evenly, you can get the self-adhesive mold transfer silicone.

[0023] Test results: Shore A hardness 31, tensile strength 3.7MPa, tear strength 15kN / m, self-adhesion (does not fall off after suspending a 1.5kg weight for 30 minutes), no deformation after baking at 200℃ for 4 hours, and no residue after repeated heat treatments 500 times.

[0024] Comparative Example 2 Component A: 100 parts of divinyl-terminated polydimethylsiloxane, 30 parts of fumed silica, 0.3 parts of platinum catalyst (0.5% Pt in isopropanol chloroplatinate solution + 0.5% Pt in tetrahydrofuran chloroplatinate solution + 1% Pt in methyl vinyl polysiloxane platinum complex = 2:1:1), and 3 parts of tackifier (0.2 mol / 100g+ epoxy-modified silicone oil). Component B: 3 parts of hydrogen-containing silicone oil (0.2% hydrogen content, 100 mPa·s), 0.18 parts of ethynylcyclohexanol; Preparation process: S1. Preparation of component A: ① Add 100 parts of double-ended vinyl polydimethylsiloxane and 30 parts of silica to a kneader and knead for 35 minutes at a temperature of 45℃ and a speed of 40r / min to obtain a homogeneous silicone oil-silica composite. ② The silicone oil-fumed silica composite was transferred to a planetary mixer, and 0.3 parts of platinum catalyst and 3 parts of thickener were added. The mixture was stirred for 35 minutes at 45°C and 150 r / min. Then, the mixture was degassed for 25 minutes at a vacuum of -0.092 MPa and 55°C. After cooling to room temperature, component A was obtained. S2. Preparation of component B: Add 3 parts of hydrogen-containing silicone oil and 0.18 parts of inhibitor to a disperser and disperse for 18 minutes at a speed of 600 r / min until homogeneous and transparent to obtain component B; S3. Finished Product Preparation: Mix component A and component B at a mass ratio of 10:1, stir at 400 r / min for 10 minutes, and after mixing evenly, you can get the self-adhesive mold transfer silicone.

[0025] Test results: Shore A hardness 27, tensile strength 3.1MPa, tear strength 12kN / m, self-adhesion (falls off after 10 minutes of hanging a 1kg weight), no deformation after baking at 200℃ for 4 hours, and no residue after repeated heat treatments 500 times.

[0026] In the above embodiments, Example 1 is the formulation with the best performance, Comparative Example 1 is a comparative example under a single platinum catalyst. Although the performance is similar to that of Example 1, the cost of a single platinum catalyst is high and it has the disadvantage of poor compatibility during preparation and application. Comparative Example 2 is a comparative example under a single tackifier. The transfer silicone under a single tackifier has the disadvantages of poor self-adhesion and poor strength.

[0027] Compared to existing transfer mold silicone, this invention has the following advantages: 1. Its self-adhesive properties are precisely adapted to heat transfer processes, eliminating the need for additional adhesive and improving construction efficiency. The composite tackifier exhibits excellent compatibility with dual-terminated vinyl silicone oil and hydrogen-containing silicone oil. During the platinum-catalyzed crosslinking process, the polar functional groups of the tackifier are oriented and distributed at the silicone interface, forming intermolecular forces / weak chemical bonds with the heat transfer substrate (such as fabric, leather, plastic, and metal molds), giving the silicone stable self-adhesive force. During heat transfer, the silicone mold and the substrate adhere tightly without lifting or delamination. The low addition amount of 2-5 parts of composite tackifier ensures the self-adhesive effect without reducing the cohesive strength of the silicone or leaving residue during demolding due to excessive tackifier, thus meeting both the core requirements of self-adhesion and demolding. Compared to traditional heat transfer silicone, which requires pre-treatment by coating the mold / substrate surface, this formula can be directly molded and used, greatly simplifying the construction steps and improving heat transfer production efficiency.

[0028] II. The precise proportions of the hydrosilicone crosslinking system result in uniform performance of the cured silicone and high molding accuracy. The proportions of the core crosslinking components (100 parts of double-ended vinyl silicone oil, 2-4 parts of hydrogen-containing silicone oil, 0.1-0.5 parts of platinum catalyst, and 0.15-0.2 parts of inhibitor) are precisely controlled to be within the golden ratio range for addition-type silicone rubber, ensuring that the crosslinking reaction is controllable and the performance after curing is excellent. Silicon-hydrogen molar ratio matching: 2-4 parts of hydrogen-containing silicone oil (Si-H bond) and 100 parts of double-ended vinyl silicone oil (C=C bond) form an optimal silicon-hydrogen ratio of 1.0-1.2:1. The slight excess of Si-H bonds ensures complete cross-linking of vinyl groups. After the silicone is cured, there are no unreacted monomers, resulting in high cohesive strength, excellent elasticity, and resistance to deformation after molding. The platinum catalyst concentration is moderate: an addition amount of 0.1~0.5 parts (corresponding to a platinum concentration of about 20~100ppm) ensures a moderate crosslinking reaction rate (curable at room temperature / medium temperature, without the need for high temperature and long-term baking), and will not cause the silicone to yellow or develop bubbles / pinholes due to excessive catalyst, resulting in a smooth and defect-free mold surface. Precise inhibitor dosage: 0.15~0.2 parts of inhibitor form the best synergy with platinum catalyst, with excellent storage stability at room temperature (single-component system can be stored stably, and two-component system has sufficient working time after mixing), avoiding premature curing of silicone during construction. At the same time, the inhibitor is quickly removed when heated and heated, without affecting the final curing degree of silicone.

[0029] 3. The appropriate amount of silica filler ensures balanced hardness, strength, and wear resistance of the silicone, resulting in a long mold lifespan. Using 25-35 parts of silica as a reinforcing filler is designed to meet the needs of repeated use, abrasion resistance, and tear resistance in heat transfer molds. The filler content is within the optimal reinforcing range for addition-cure silicone rubber. Silica forms siloxane bonds with dual-terminated vinyl silicone oil, significantly improving the tensile strength, tear strength, and abrasion resistance of the silicone. The heat transfer mold will not break or crumble during repeated pressing and demolding, and its service life is much longer than that of silicone with a lower filler content. The filler content of 25-35 parts does not exceed the critical value, avoiding a sudden increase in silicone viscosity and difficulties in molding due to excessive silica. At the same time, it ensures that the silicone retains good flexibility and resilience, preventing cracking when bonding to irregularly shaped substrates and easy demolding after heat transfer. The reinforcement of silica gives the silicone a certain degree of hardness support (Shore A hardness of about 20-40 degrees, suitable for the needs of heat transfer molds). It is neither too soft, which would cause mold deformation, nor too hard, which would cause demolding difficulties and damage to the substrate.

[0030] IV. Excellent temperature resistance, suitable for the high-temperature environment of heat transfer processes, with stable performance and no degradation. Based on the inherent properties of addition-cure silicone rubber, and with a precise crosslinking system, the cured silicone exhibits excellent high and low temperature resistance, perfectly matching the temperature requirements of heat transfer processes (conventional heat transfer temperature 100~200℃). Under the high-temperature environment of heat transfer, the silicone will not soften, deform, or age, and the mold shape remains intact after demolding. The Si-C bonds formed by the hydrogen silane crosslinking have high bond energy and excellent chemical stability. After long-term high-temperature heat transfer, the self-adhesion, elasticity, and strength of the silicone do not show significant attenuation, solving the problem of performance degradation of traditional silicone after multiple heat transfers.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. A self-adhesive mold transfer silicone, characterized in that, It is mainly prepared by mixing component A and component B in a mass ratio of 10:1, wherein: Component A comprises the following components in parts by weight: 100 parts of divinyl-terminated polydimethylsiloxane, 25-35 parts of silica, 2-5 parts of tackifier, and 0.1-0.5 parts of platinum catalyst; Component B comprises the following components in parts by weight: 2-4 parts of hydrogen-containing silicone oil and 0.15-0.2 parts of inhibitor; The dual-terminated vinyl polydimethylsiloxane is ViMe2Si(Me2SiO)nSiMe2Vi, with a viscosity of 10,000 mPa·s to 20,000 mPa·s. The platinum catalyst is a mixture of isopropanol chloroplatinate solution, tetrahydrofuran chloroplatinate solution, and a platinum complex coordinated with methyl vinyl polysiloxane in a mass ratio of 2:1:

1. The tackifier is a mixture of epoxy-based hydrocarbon-modified silicone oil tackifier and thermoplastic polyurethane tackifier in a mass ratio of 2:

1.

2. The self-adhesive mold transfer silicone according to claim 1, characterized in that: The silica is a fumed silica produced by hydrophobic chemical processes, with a specific surface area of ​​200-300 m². 2 / g.

3. The self-adhesive mold transfer silicone according to claim 1, characterized in that: The inhibitor is selected from one or a combination of two of methylbutynol, ethynylcyclohexanol, phenylbutynol, and propylbutynol.

4. The self-adhesive mold transfer silicone according to claim 1, characterized in that: The hydrogen-containing silicone oil is a side-chain hydrogen-containing polydimethylsiloxane with a hydrogen content of 0.1% to 0.3% and a viscosity of 50 to 200 mPa·s.

5. The self-adhesive mold transfer silicone according to claim 1, characterized in that: The epoxy value of the epoxy-based hydrocarbon-modified silicone oil tackifier is 0.1~0.3 mol / 100g, and the hydrocarbon group is C3~C8 alkyl.

6. The self-adhesive mold transfer silicone according to claim 1, characterized in that: In the platinum catalyst, the platinum content of the isopropanol chloroplatinate solution is 0.5%~2%, the platinum content of the tetrahydrofuran chloroplatinate solution is 0.5%~2%, and the platinum content of the platinum complex coordinated with methyl vinyl polysiloxane is 1%~5%.

7. A method for preparing a self-adhesive mold transfer silicone as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Preparation of component A: ① Add 100 parts by weight of divinyl-terminated polydimethylsiloxane and 25-35 parts by weight of silica to a kneader and knead for 30-40 minutes at a temperature of 40-50℃ and a speed of 30-50 r / min to obtain a homogeneous silicone oil-silica composite. ② The silicone oil-fumed silica composite was transferred to a planetary mixer, and 0.1-0.5 parts by weight of platinum catalyst and 2-5 parts by weight of thickener were added. The mixture was stirred for 30-40 minutes at a temperature of 40-50℃ and a speed of 100-200 r / min. Then, the mixture was degassed for 20-30 minutes at a vacuum of -0.09 to -0.095 MPa and a temperature of 50-60℃. The mixture was then cooled to room temperature to obtain component A. S2. Preparation of component B: Add 2-4 parts by weight of hydrogen-containing silicone oil and 0.15-0.2 parts by weight of inhibitor to a disperser and disperse for 15-20 minutes at a speed of 500-800 r / min until homogeneous and transparent to obtain component B; S3. Finished Product Preparation: Mix component A and component B at a mass ratio of 10:1, and stir for 5 to 10 minutes at a speed of 300 to 500 r / min until the mixture is homogeneous to obtain self-adhesive mold transfer silicone.