Two-component thermally conductive gel composition

Abstract

The invention provides a bi-component heat-conducting gel composition. The bi-component heat-conducting gel composition comprises a component A and a component B, the component A is prepared from 5 to 20 parts of first vinyl polydimethyl organosiloxane, 0.2 to 1 part of silane coupling agent, 60 to 95 parts of first heat-conducting filler and 0.1 to 1 part of catalyst; the first vinyl polydimethyl organic siloxane is prepared from vinyl polydimethyl organic siloxane A1 and vinyl polydimethyl organic siloxane A2; the component B is prepared from 5 to 20 parts of second vinyl polydimethyl organosiloxane, 0.2 to 1 part of silane coupling agent, 0.8 to 5 parts of polysiloxane with hydrogen-containing end, 0.05 to 1 part of cross-linking agent, 60 to 95 parts of second heat-conducting filler, 0.1 to 1 part of inhibitor and 0.02 to 0.1 part of coloring agent; each of the first heat-conducting filler and the second heat-conducting filler comprises aluminum oxide powder with the particle size of 10-20 microns, aluminum oxide powder with the particle size of 1-5 microns and zinc oxide powder with the particle size of 0.2-2 microns. The invention has the advantages of high thermal conductivity, process adaptability and long-acting storage stability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of silicone heat-conducting gels, and particularly relates to a two-component heat-conducting gel composition. BACKGROUND

[0002] The silicone heat-conducting gel realizes high heat conductivity, flexibility and temperature resistance through a silicone matrix (vinyl / hydrogen-containing polysiloxane platinum gold catalytic crosslinking) and high-filled heat-conductive fillers, and has the properties of automatic dispensing adaptability and micron-level gap filling capacity, and is widely used in heat dissipation of high-power chips, new energy automobile battery packs and 5G communication modules.

[0003] As a core material in the field of thermal management, the silicone heat-conducting gel plays a key role in the electronic, automotive, new energy and other industries, and the market demands higher heat conductivity, lower thermal resistance, more stable reliability and longer storage stability. However, in the existing silicone heat-conducting gel, due to the high filler density and low silicone oil matrix, mismatching and weak interfacial bonding occur, the silicone oil floats and the filler settles, resulting in oil and powder stratification, which leads to imbalance of the heat-conducting gel mixing and causes imbalance of various performances, greatly increasing the risk of heat management out of control in the application process. Although the existing technology discloses the use of white carbon black thickening for improvement, the oil out rate is still greater than 0.5%, and the extrusion rate is low, which affects the process dispensing performance.

[0004] Therefore, it is of great significance to develop a heat-conducting gel with high heat conductivity, process adaptability and long-term storage stability for product stability application. SUMMARY

[0005] In view of this, the present application provides a two-component heat-conducting gel composition with high heat conductivity, process adaptability and long-term storage stability.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions: The present application provides a two-component heat-conducting gel composition, comprising A component and B component; The A component comprises, in mass fraction: 5-20 parts of first vinyl polydimethyl organosiloxane, 0.2-1 part of silane coupling agent, 60-95 parts of first heat-conducting filler and 0.1-1 part of catalyst; wherein the first vinyl polydimethyl organosiloxane comprises vinyl polydimethyl organosiloxane A1 and vinyl polydimethyl organosiloxane A2, wherein the viscosity of the vinyl polydimethyl organosiloxane A1 is 50-500 mPa·s, the vinyl content is 0.4-1.6 wt%, the viscosity of the vinyl polydimethyl organosiloxane A2 is 1000-3000 mPa·s, and the vinyl content is 0.1-0.5 wt%; The B component includes, in mass parts, 5-20 parts of a second vinyl polydimethyl organosiloxane, 0.2-1 part of a silane coupling agent, 0.8-5 parts of a hydrogen-terminated polysiloxane, 0.05-1 part of a crosslinking agent, 60-95 parts of a second heat-conducting filler, 0.1-1 part of an inhibitor, and 0.02-0.1 part of a dyeing agent; The first heat-conducting filler and the second heat-conducting filler each include alumina powder with a particle size of 10-20 μm, alumina powder with a particle size of 1-5 μm, and zinc oxide powder with a particle size of 0.2-2 μm; and the silane coupling agent has a structural formula of:

[0007] R1, R2 are each independently selected from C1-C4 alkyl, x is an arbitrary integer selected from 4-15, m is an arbitrary integer selected from 1-5, and n is an arbitrary integer selected from 50-400.

[0008] The first heat-conducting filler includes alumina powder with a particle size of 10-20 μm, alumina powder with a particle size of 1-5 μm, and zinc oxide powder with a particle size of 0.2-2 μm, the second heat-conducting filler includes alumina powder with a particle size of 10-20 μm, alumina powder with a particle size of 1-5 μm, and zinc oxide powder with a particle size of 0.2-2 μm; the preparation method of the silane coupling agent is referred to the preparation method of the silane coupling agent of formula I in the patent CN116355422B, and the silane coupling agent is the silane coupling agent of formula I in CN116355422B.

[0009] Preferably, the vinyl polydimethyl organosiloxane has at least two unsaturated groups connected to silicon atoms per molecule.

[0010] Preferably, the second vinyl polydimethyl organosiloxane includes at least one of vinyl polydimethyl organosiloxane B1 and vinyl polydimethyl organosiloxane B2, wherein the viscosity of the vinyl polydimethyl organosiloxane B1 is 50-500 mPa·s, and the vinyl content is 0.4-1.6 wt%, the viscosity of the vinyl polydimethyl organosiloxane B2 is 1000-3000 mPa·s, and the vinyl content is 0.1-0.5 wt%.

[0011] Preferably, the hydrogen-terminated polysiloxane has a hydrogen content of 0.07-0.15 wt%.

[0012] Preferably, the hydrogen-terminated polysiloxane has a viscosity of 10-200 mPa·s.

[0013] Preferably, the crosslinking agent includes at least one of hydrogen-containing silicone resin and hydrogen-containing side polysiloxane.

[0014] Preferably, the hydrogen content of the hydrogen-containing silicone resin is 0.5-2 wt%, and the hydrogen content of the polysiloxane with a side hydrogen-containing group is 0.1-0.6 wt%.

[0015] Preferably, the viscosity of the hydrogen-containing silicone resin is 10-500 mPa·s, and the viscosity of the polysiloxane with a side hydrogen-containing group is 10-200 mPa·s.

[0016] Preferably, the catalyst comprises a platinum gold catalyst.

[0017] Preferably, the platinum gold content of the platinum gold catalyst is 3000-5000 ppm.

[0018] Preferably, the inhibitor comprises at least one of ethynylcyclohexanol, cyclic vinyl siloxane, tetra-vinyl tetramethyl cyclotetrasiloxane, and benzotriazole.

[0019] The application also provides a preparation method of the two-component heat-conducting gel composition, comprising the following steps: S1, preparation of component A: stirring and dispersing the first vinyl polydimethyl organosiloxane, silane coupling agent, and first heat-conducting filler, adding a catalyst, stirring and dispersing, to obtain component A; S2, preparation of component B: stirring and dispersing the second vinyl polydimethyl organosiloxane, silane coupling agent, second heat-conducting filler, and dyeing agent, adding the end-hydrogen-containing polysiloxane, crosslinking agent, and inhibitor, stirring and dispersing, to obtain component B.

[0020] It should be noted that the order of steps S1 and S2 is not limited; specifically, step S1 can be stirring and dispersing the first vinyl polydimethyl organosiloxane, silane coupling agent, and first heat-conducting filler in a reaction kettle under the conditions of stirring at 10 Hz and dispersing at 100 Hz, and then stirring and dispersing under vacuum at 150℃, at a stirring speed of 50 Hz and a dispersing speed of 300 Hz, and constant-temperature stirring under vacuum for 60 min; then stirring and dispersing under vacuum at 35℃, at a stirring speed of 5 Hz and a dispersing speed of 0 Hz, and stirring under vacuum for 30 min after adding a catalyst at a stirring speed of 50 Hz and a dispersing speed of 600 Hz, to obtain component A; and step S2 can be stirring and dispersing the second vinyl polydimethyl organosiloxane, silane coupling agent, second heat-conducting filler, and dyeing agent in a reaction kettle under the conditions of stirring at 10 Hz and dispersing at 100 Hz, and then stirring and dispersing under vacuum at 150℃, at a stirring speed of 50 Hz and a dispersing speed of 300 Hz, and constant-temperature stirring under vacuum for 60 min; then stirring and dispersing under vacuum at 35℃, at a stirring speed of 5 Hz and a dispersing speed of 0 Hz, and stirring under vacuum for 30 min after adding the end-hydrogen-containing polysiloxane, crosslinking agent, and inhibitor at a stirring speed of 50 Hz and a dispersing speed of 600 Hz, to obtain component B.

[0021] Compared with the prior art, the present application has the following beneficial effects: The two-component heat-conducting gel composition provided by the present application has low viscosity, high thixotropy, high thermal conductivity, low thermal resistance, high extrusion rate, high mechanical properties, and can reduce oil separation rate, and the surface does not separate oil after 180 days of storage, and has high thermal conductivity, process adaptability and long-term storage stability. DETAILED DESCRIPTION

[0022] The present application will be further described in detail below with reference to specific examples, so that those skilled in the art can more clearly understand the present application.

[0023] In Examples 1-4 and Comparative Examples 1-3, the silane coupling agent is the silane coupling agent of formula I prepared in patent CN116355422B, and the preparation method is as follows: In a three-necked flask, 80-300 parts by mass of hydrogen-terminated polysiloxane S-83 (Zhejiang Runhe Organic Silicon New Material Co., Ltd.) was weighed and heated to 60-80 ℃. Platinum-gold catalyst (platinum-divinyltetramethyldisiloxane complex) 0.01-0.1 parts by mass and vinyltrimethoxysilane 0.2-1.5 parts by mass were taken and mixed uniformly in a constant pressure dropping funnel, and were added dropwise into the three-necked flask at a flow rate of 1 drop per second, and stirred and reacted. After the dropwise addition was completed, the reaction was continued for 2-5 h. The temperature was controlled at 60-80 ℃, then 1-5 parts by mass of 1-octene was added, and stirred and reacted for 2-5 h. After the reaction was completed, the temperature was raised to 170-180 ℃, vacuum was applied to remove low boiling point substances for 4-6 h, and the low boiling point substances were removed to obtain.

[0024] Example 1 A two-component heat-conducting gel composition, comprising A component and B component; The composition of the A component, in parts by mass, comprises: 100 mPa·s vinyl polydimethyl organosiloxane (vinyl content: 1.05 wt%) 6.7 parts, 1000 mPa·s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 2.4 parts, silane coupling agent 0.5 parts, 10 μm aluminum oxide 47.6 parts, 2 μm aluminum oxide 25.7 parts, 0.7 μm zinc oxide 16.7 parts, platinum-gold catalyst (platinum-gold content: 3000 ppm) 0.4 parts; The composition of the B component, in terms of mass parts, includes: 100 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 1.05 wt%) 3.4 parts, 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 2.4 parts, silane coupling agent 0.5 parts, 50 mPa-s hydrogen-containing silicone resin (hydrogen content: 0.9 wt%) 0.07 parts, 100 mPa-s hydrogen-terminated polysiloxane (hydrogen content: 0.1 wt%) 3.34 parts, 10 μm alumina 47.6 parts, 2 μm alumina 25.7 parts, 0.7 μm zinc oxide 16.7 parts, ethynylcyclohexanol (inhibitor) 0.24 parts, blue dye 0.05 parts.

[0025] Example 2 A two-component heat-conducting gel composition including an A component and a B component; The composition of the A component, in terms of mass parts, includes: 100 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 1.05 wt%) 2.4 parts, 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 6.7 parts, silane coupling agent 0.5 parts, 10 μm alumina 47.6 parts, 2 μm alumina 25.7 parts, 0.7 μm zinc oxide 16.7 parts, platinum gold catalyst (platinum gold content: 3000 ppm) 0.4 parts; The composition of the B component, in terms of mass parts, includes: 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 6.72 parts, silane coupling agent 0.5 parts, 50 mPa-s hydrogen-containing polysiloxane (hydrogen content: 0.1 wt%) 0.24 parts, 100 mPa-s hydrogen-terminated polysiloxane (hydrogen content: 0.1 wt%) 2.14 parts, 10 μm alumina 47.6 parts, 2 μm alumina 25.7 parts, 0.7 μm zinc oxide 16.7 parts, ethynylcyclohexanol (inhibitor) 0.24 parts, blue dye 0.05 parts.

[0026] Example 3 A two-component heat-conducting gel composition including an A component and a B component; The composition of the A component, in terms of mass parts, includes: 100 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 1.05 wt%) 2.4 parts, 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 6.7 parts, silane coupling agent 0.5 parts, 20 μm alumina 47.6 parts, 2 μm alumina 25.7 parts, 0.7 μm zinc oxide 16.7 parts, platinum gold catalyst (platinum gold content: 3000 ppm) 0.4 parts; The composition of the B component, in mass parts, includes: 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 6.72 parts, silane coupling agent 0.5 parts, 50 mPa-s hydrogen-containing polysiloxane (hydrogen content: 0.1 wt%) 0.24 parts, 100 mPa-s hydrogen-terminated polysiloxane (hydrogen content: 0.1 wt%) 2.14 parts, 20 μm alumina 47.6 parts, 2 μm alumina 25.7 parts, 0.7 μm zinc oxide 16.7 parts, ethynylcyclohexanol (inhibitor) 0.24 parts, blue dye 0.05 parts.

[0027] Example 4 A two-component heat-conducting gel composition including an A component and a B component; The composition of the A component, in mass parts, includes: 500 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.45 wt%) 5.8 parts, 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 2.7 parts, silane coupling agent 0.5 parts, 10 μm alumina 56.9 parts, 5 μm alumina 23.3 parts, 0.7 μm zinc oxide 10.5 parts, platinum gold catalyst (platinum gold content: 3000 ppm) 0.4 parts; The composition of the B component, in mass parts, includes: 500 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.45 wt%) 5.8 parts, 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 1.88 parts, silane coupling agent 0.5 parts, 50 mPa-s hydrogen-containing silicone resin (hydrogen content: 0.9 wt%) 0.07 parts, 100 mPa-s hydrogen-terminated polysiloxane (hydrogen content: 0.1 wt%) 1.07 parts, 10 μm alumina 56.9 parts, 5 μm alumina 23.3 parts, 0.7 μm zinc oxide 10.5 parts, ethynylcyclohexanol (inhibitor) 0.24 parts, blue dye 0.05 parts.

[0028] Comparative Example 1 A two-component heat-conducting gel composition including an A component and a B component; The composition of the A component, in mass parts, includes: 100 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 1.05 wt%) 6.7 parts, 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 2.4 parts, silane coupling agent 0.5 parts, 10 μm alumina 73.3 parts, 0.7 μm zinc oxide 16.7 parts, platinum gold catalyst (platinum gold content: 3000 ppm) 0.4 parts; The composition of the B component, in terms of parts by mass, includes: 100 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 1.05 wt%) 3.4 parts, 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 2.4 parts, silane coupling agent 0.5 parts, 50 mPa-s hydrogen-containing silicone resin (hydrogen content: 0.9 wt%) 0.07 parts, 100 mPa-s hydrogen-terminated polysiloxane (hydrogen content: 0.1 wt%) 3.34 parts, 10 μm alumina 73.3 parts, 0.7 μm zinc oxide 16.7 parts, ethynylcyclohexanol (inhibitor) 0.24 parts, blue dye 0.05 parts.

[0029] Comparative Example 2 A two-component heat-conducting gel composition including an A component and a B component; The composition of the A component, in terms of parts by mass, includes: 500 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.45 wt%) 9.6 parts, silane coupling agent 0.5 parts, 10 μm alumina 47.6 parts, 2 μm alumina 25.7 parts, 0.7 μm zinc oxide 16.7 parts, platinum gold catalyst (platinum gold content: 3000 ppm) 0.4 parts; The composition of the B component, in terms of parts by mass, includes: 500 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.45 wt%) 7.8 parts, silane coupling agent 0.5 parts, 50 mPa-s hydrogen-containing polysiloxane (hydrogen content: 0.1 wt%) 0.16 parts, 100 mPa-s hydrogen-terminated polysiloxane (hydrogen content: 0.1 wt%) 1.75 parts, 10 μm alumina 47.6 parts, 2 μm alumina 25.7 parts, 0.7 μm zinc oxide 16.7 parts, ethynylcyclohexanol (inhibitor) 0.24 parts, blue dye 0.05 parts.

[0030] Comparative Example 3 A two-component heat-conducting gel composition including an A component and a B component; The composition of the A component, in terms of parts by mass, includes: 100 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 1.05 wt%) 2.4 parts, 1000 mPa-s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 6.7 parts, silane coupling agent 0.5 parts, 40 μm alumina 47.6 parts, 5 μm alumina 25.7 parts, 1 μm zinc oxide 16.7 parts, platinum gold catalyst (platinum gold content: 3000 ppm) 0.4 parts; The composition of the B component, in mass parts, includes: 1000 mPa s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 6.72 parts, silane coupling agent 0.5 parts, 50 mPa s hydrogen-containing polysiloxane (hydrogen content: 0.1 wt%) 0.24 parts, 100 mPa s hydrogen-containing end group-containing polysiloxane (hydrogen content: 0.1 wt%) 2.14 parts, 40 μm alumina 47.6 parts, 5 μm alumina 25.7 parts, 1 μm zinc oxide 16.7 parts, ethynyl cyclohexanol (inhibitor) 0.24 parts, blue dye 0.05 parts.

[0031] Comparative Example 4 A two-component heat-conducting gel composition includes an A component and a B component; The composition of the A component, in mass parts, includes: 100 mPa s vinyl polydimethyl organosiloxane (vinyl content: 1.05 wt%) 6.7 parts, 1000 mPa s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 2.4 parts, KH560 (silane coupling agent) 0.5 parts, 10 μm alumina 47.6 parts, 2 μm alumina 25.7 parts, 0.7 μm zinc oxide 16.7 parts, platinum gold catalyst (platinum gold content: 3000 ppm) 0.4 parts; The composition of the B component, in mass parts, includes: 100 mPa s vinyl polydimethyl organosiloxane (vinyl content: 1.05 wt%) 3.4 parts, 1000 mPa s vinyl polydimethyl organosiloxane (vinyl content: 0.26 wt%) 2.4 parts, KH560 (silane coupling agent) 0.5 parts, 50 mPa s hydrogen-containing silicone resin (hydrogen content: 0.9 wt%) 0.07 parts, 100 mPa s hydrogen-containing end group-containing polysiloxane (hydrogen content: 0.1 wt%) 3.34 parts, 10 μm alumina 47.6 parts, 2 μm alumina 25.7 parts, 0.7 μm zinc oxide 16.7 parts, ethynyl cyclohexanol (inhibitor) 0.24 parts, blue dye 0.05 parts.

[0032] Performance test and results The two-component heat-conducting gel compositions of Examples 1-4 and Comparative Examples 1-4 were tested for performance, and each product was divided into two parts, one part was tested for performance before curing (viscosity, thixotropic index, extrusion rate, oil separation rate) and after curing (A component and B component were cured at a mass ratio of 1:1) (thermal conductivity, elongation at break, thermal resistance), and the other part was defoamed, placed at room temperature and kept flat, and the surface oil separation performance was tracked, and the results are shown in Table 1; wherein: The viscosity was tested by a Brookfield rotational viscometer; The extrusion rate was tested by a point dispenser with a model of YMS-886A; The thermal conductivity and thermal resistance were tested by a Swingle thermal resistance meter with a model of SN:5354-1; The oil separation rate was tested by a centrifuge, and the specific method was as follows: equal amounts of samples m1 were placed in 20 mL centrifuge tubes, centrifugation was performed at 3000 rpm for 60 min, the surface oil portion m2 was weighed, and the oil separation rate = (m2 / m1) * 100%; The long-term storage surface oil separation performance test was performed, and the results were as follows: "O" represented no oil separation during storage, "X" represented oil separation during storage, and "XX" represented serious oil separation during storage.

[0033] Table 1 shows the performance test results of the two-component thermal conductive gel compositions of the examples and the comparative examples.

[0034] As shown in Table 1, the two-component thermal conductive gel composition provided by the application has low viscosity, high thixotropy, an extrusion rate of not less than 3 g / s, a thermal conductivity of not less than 2 W / (m*K) after curing, a thermal resistance of less than 0.3 ℃*cm / W, an elongation at break of up to 240%, an oil separation rate of as low as 0.07%, and no surface oil separation after storage for 180 days, and the composition has high thermal conductivity, process adaptability and long-term storage stability. 2

[0035] In the application, the specific raw materials are not described, and are all existing substances that can be directly purchased on the market.

[0036] The above is only a preferred embodiment of the application, and is not used to limit the protection scope of the application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application should be included in the protection scope of the application.​

Claims

1. A two-component heat conducting gel composition, characterized in that, The A component and the B component are included; The A component includes, in mass parts, 5-20 parts of a first vinyl polydimethyl organosiloxane, 0.2-1 part of a silane coupling agent, 60-95 parts of a first heat-conducting filler, and 0.1-1 part of a catalyst; wherein the first vinyl polydimethyl organosiloxane includes vinyl polydimethyl organosiloxane A1 and vinyl polydimethyl organosiloxane A2, wherein the viscosity of the vinyl polydimethyl organosiloxane A1 is 50-500 mPa·s, and the vinyl content is 0.4-1.6 wt%, the viscosity of the vinyl polydimethyl organosiloxane A2 is 1000-3000 mPa·s, and the vinyl content is 0.1-0.5 wt%. The B component includes, in mass parts, 5-20 parts of a second vinyl polydimethyl organosiloxane, 0.2-1 part of a silane coupling agent, 0.8-5 parts of a hydrogen-terminated polysiloxane, 0.05-1 part of a crosslinking agent, 60-95 parts of a second heat-conducting filler, 0.1-1 part of an inhibitor, and 0.02-0.1 part of a dyeing agent. The first heat-conducting filler and the second heat-conducting filler both include alumina powder with a particle size of 10-20 μm, alumina powder with a particle size of 1-5 μm, and zinc oxide powder with a particle size of 0.2-2 μm; the structure formula of the silane coupling agent is: wherein R1 and R2 are independently selected from C1-C4 alkyl, x is an arbitrary integer selected from 4-15, m is an arbitrary integer selected from 1-5, and n is an arbitrary integer selected from 50-400.

2. The two-component heat conducting gel composition according to claim 1, characterized in that, The second vinyl polydimethyl organosiloxane includes at least one of vinyl polydimethyl organosiloxane B1 and vinyl polydimethyl organosiloxane B2, wherein the viscosity of the vinyl polydimethyl organosiloxane B1 is 50-500 mPa·s, and the vinyl content is 0.4-1.6 wt%, the viscosity of the vinyl polydimethyl organosiloxane B2 is 1000-3000 mPa·s, and the vinyl content is 0.1-0.5 wt%.

3. The two-component heat conducting gel composition according to claim 1, characterized in that, The hydrogen content of the hydrogen-terminated polysiloxane is 0.07-0.15 wt%.

4. The two-component heat conducting gel composition according to claim 1, characterized in that, The viscosity of the hydrogen-terminated polysiloxane is 10-200 mPa·s.

5. The two-part heat-conductive gel composition according to claim 1, wherein The crosslinking agent includes at least one of hydrogen-containing silicone resin and hydrogen-containing side group polysiloxane.

6. The two-component heat conducting gel composition according to claim 5, characterized in that, The hydrogen content of the hydrogen-containing silicone resin is 0.5-2 wt%, and the hydrogen content of the hydrogen-containing side group polysiloxane is 0.1-0.6 wt%.

7. The two-part heat-conductive gel composition according to claim 5, wherein The viscosity of the hydrogen-containing silicone resin is 10-500 mPa·s, and the viscosity of the hydrogen-containing side group polysiloxane is 10-200 mPa·s.

8. The two-part, heat-conductive gel composition of claim 1, wherein, The catalyst includes platinum gold catalyst.

9. The two-component heat conducting gel composition according to claim 8, characterized in that, The platinum gold content of the platinum gold catalyst is 3000-5000 ppm.

10. The two-part, heat-conductive gel composition of claim 1, wherein, The inhibitor includes at least one of ethynylcyclohexanol, cyclic vinyl siloxane, tetraethenyltetramethylcyclotetrasiloxane, and benzotriazole.

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