Addition type organic silicon pouring sealant as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of pouring sealants, and particularly relates to an addition type organic silicon pouring sealant as well as a preparation method and application thereof. The preparation raw materials of the addition type organic silicon pouring sealant comprise a component A and a component B, the component A comprises methyl vinyl polysiloxane, methyl hydrogen polysiloxane, a cross-linking agent and a coupling agent; the component B comprises methyl vinyl polysiloxane, a catalyst A and a catalyst B; the catalyst A comprises a platinum catalyst; the catalyst B comprises a titanate catalyst. The cross-linking agent and the specific coupling agent are subjected to hydrolytic condensation under the action of the titanate catalyst and are combined with hydrogen bonds on a base material, so that the bonding capacity of the organic silicon pouring sealant is improved, and the Al / Al shear strength of the organic silicon pouring sealant reaches 2 MPa or above. Under the action of a platinum catalyst, C = C double bonds in methyl vinyl polysiloxane and Si-H in methyl hydrogen polysiloxane are subjected to an addition reaction to form a spatial network structure, so that the body strength of the organic silicon pouring sealant can be improved.

Description

Technical Field

[0001] This invention belongs to the field of potting compound technology, and specifically relates to an addition-type silicone potting compound, its preparation method, and its application. Background Technology

[0002] Silicone potting compounds are used for potting electronic and electrical appliances, mainly serving protective functions such as sealing, moisture protection, dust protection, thermal conductivity, and flame retardancy. Currently, addition-type silicone potting compounds on the market do not have adhesive properties. To obtain good adhesion, a primer is required, but primers contain a large amount of solvents, are volatile, and have poor environmental performance.

[0003] Therefore, it is of great significance to provide an addition-type silicone potting compound with good adhesion. Summary of the Invention

[0004] The present invention aims to solve one or more technical problems existing in the prior art, and at least provide a beneficial solution. Specifically, the present invention provides an addition-type silicone potting compound with good adhesion.

[0005] The inventive concept of this invention: The raw materials for preparing the addition-type silicone potting compound of this invention include component A and component B; component A includes methyl vinyl polysiloxane, methyl polyhydrosiloxane, crosslinking agent, and coupling agent; component B includes methyl vinyl polysiloxane, catalyst A, and catalyst B; catalyst A includes a platinum catalyst; catalyst B includes a titanate catalyst.

[0006] This invention utilizes a crosslinking agent and a specific type of coupling agent, under the action of catalyst B, to hydrolyze and condense, forming hydrogen bonds with the substrate, thereby improving the adhesion of the silicone potting compound and achieving an Al / Al shear strength of over 2 MPa. Under the action of catalyst A, the C=C double bonds in methyl vinyl polysiloxane and the Si-H bonds in methyl polyhydrosiloxane undergo an addition reaction to form a spatial network structure, which can improve the bulk strength of the silicone potting compound.

[0007] Therefore, a first aspect of the present invention provides an addition-type silicone potting compound.

[0008] Specifically, the raw materials for preparing the addition-type silicone potting compound include component A and component B; Component A includes methyl vinyl polysiloxane, methyl polyhydrosiloxane, crosslinking agent, and coupling agent; Component B includes methyl vinyl polysiloxane, catalyst A, and catalyst B; Catalyst A includes a platinum catalyst; catalyst B includes a titanate catalyst.

[0009] Preferably, the structural formula of the methyl vinyl polysiloxane is CH2=CH(CH3)2SiO[R4R5SiO] 1 / 2 ] a [(R4)2SiO 1 / 2 ] b Si(CH3)2R6, wherein R4 is selected from any one of C1-C5 straight-chain or branched alkyl or phenyl, R5 is selected from any one of C1-C5 straight-chain or branched alkyl or phenyl, R6 is selected from any one of -CH=CH2, C1-C5 straight-chain or branched alkyl or phenyl, and a and b are independently selected from any integer from 40 to 1000.

[0010] Preferably, the viscosity of the methyl vinyl polysiloxane at 25°C is 10-1000 cps.

[0011] Preferably, the structural formula of the methylpolyhydrosiloxane is R7(CH2)2SiO[SiMeR8O]. m [SiR9HO 3 / 2 ] n [SiO2] s Si(R 10 )2R 11 Among them, R7, R8, R9, R 10 and R 11 The components are independently selected from -H, C1-C5 straight-chain or branched alkyl groups, and phenyl groups; m, n, and s are independently selected from any integer from 10 to 200.

[0012] Preferably, the viscosity of the methyl polyhydrosiloxane at 25°C is 5-500 cps.

[0013] Preferably, the crosslinking agent includes at least one of methyltrimethoxysilane, ethyltrimethoxysilane, propyltrimethoxysilane, methyltriethoxysilane, ethyltriethoxysilane, and vinyltrimethoxysilane.

[0014] Preferably, the coupling agent comprises at least one of tris(2-carboxyethyl) isocyanurate, triallyl isocyanurate, triglycidyl isocyanurate, tris(2-hydroxyethyl) isocyanurate, and tris(2-acryloyloxyethyl) isocyanurate.

[0015] Preferably, the platinum catalyst comprises a mixture of platinum coordination compounds or platinum chelates and organopolysiloxanes.

[0016] Preferably, the platinum catalyst includes at least one of chloroplatinic acid, platinum dioxide, and cassiterite.

[0017] Preferably, the titanate catalyst includes at least one of tetrabutyl titanate, propyl titanate, ethyl titanate, methyl titanate, and diisopropyl titanate.

[0018] More preferably, the titanate catalyst includes at least one of tetrabutyl titanate, tetramethyl titanate, tetraethyl titanate, diisopropyl titanate, and n-butyl titanate.

[0019] Preferably, by weight, component A comprises 100 parts of methyl vinyl polysiloxane, 4.5-55 parts of methyl polyhydrosiloxane, 4.5-55 parts of crosslinking agent, and 4.5-55 parts of coupling agent.

[0020] More preferably, by weight, component A comprises 100 parts of methyl vinyl polysiloxane, 5-50 parts of methyl polyhydrosiloxane, 5-50 parts of crosslinking agent, and 5-50 parts of coupling agent.

[0021] Preferably, by weight, component B comprises 100 parts of methyl vinyl polysiloxane, 0.1-2.2 parts of catalyst A, and 0.01-1.1 parts of catalyst B.

[0022] More preferably, by weight, component B comprises 100 parts of methyl vinyl polysiloxane, 0.1-2 parts of catalyst A, and 0.01-1 parts of catalyst B.

[0023] Preferably, component A further includes fillers and inhibitors.

[0024] Preferably, component B further includes filler.

[0025] Preferably, by weight, component A comprises 100 parts of methyl vinyl polysiloxane, 4.5-55 parts of methyl polyhydrosiloxane, 4.5-55 parts of crosslinking agent, 4.5-55 parts of coupling agent, 100-1000 parts of filler, and 0.01-0.1 parts of inhibitor.

[0026] More preferably, by weight, component A comprises 100 parts of methyl vinyl polysiloxane, 5-50 parts of methyl polyhydrosiloxane, 5-50 parts of crosslinking agent, 5-50 parts of coupling agent, 100-1000 parts of filler, and 0.01-0.1 parts of inhibitor.

[0027] Preferably, by weight, component B comprises 100 parts of methyl vinyl polysiloxane, 0.1-2.2 parts of catalyst A, 0.01-1.1 parts of catalyst B, and 90-1100 parts of filler.

[0028] More preferably, by weight, component B comprises 100 parts of methyl vinyl polysiloxane, 0.1-2 parts of catalyst A, 0.01-1 parts of catalyst B, and 100-1000 parts of filler.

[0029] Preferably, the filler comprises at least one of aluminum hydroxide, quartz sand, silica powder, alumina, and kaolin.

[0030] Specifically, the filler is a powder filler.

[0031] Preferably, the inhibitor comprises at least one of acetylenol, diallylformamide, tetramethyldivinyldisiloxane, tetramethyltetravinylcyclotetrasiloxane, and diallyl fumarate.

[0032] Preferably, the mass ratio of component A to component B is 1:(0.8-1.2); more preferably, the mass ratio of component A to component B is 1:(0.9-1.1); even more preferably, the mass ratio of component A to component B is 1:1.

[0033] A second aspect of the present invention provides a method for preparing the addition-type silicone potting compound described in the first aspect of the present invention.

[0034] Specifically, the preparation method of the addition-type silicone potting compound includes the following steps: The raw material components of component A are mixed to obtain component A; The raw material components of component B are mixed to obtain component B; The addition-type silicone potting compound consists of components A and B.

[0035] Preferably, during the preparation of component A, the mixing is carried out under vacuum conditions, the vacuum degree is 0.01-0.1 MPa, and the mixing time is 5-60 min.

[0036] Preferably, in the preparation process of component A, after mixing, the mixture is heated and stirred to 100-120°C and then cooled to obtain component A.

[0037] Preferably, during the preparation of component B, the mixing is carried out under vacuum conditions, the vacuum degree is 0.01-0.1 MPa, and the mixing time is 5-60 min.

[0038] Preferably, in the preparation process of component B, after mixing, the mixture is heated and stirred to 100-120°C and then cooled to obtain component B.

[0039] A third aspect of the present invention provides an application of the addition-type silicone potting compound described in the first aspect of the present invention in electronic and electrical appliances.

[0040] Compared with the prior art, the beneficial effects of the technical solution provided by the present invention are as follows: (1) This invention improves the adhesion of silicone potting compound by hydrolyzing and condensing crosslinking agents and specific types of coupling agents under the action of titanate catalysts, which then bond with hydrogen bonds on the substrate, thereby achieving an Al / Al shear strength of over 2 MPa. Under the action of platinum catalyst, the C=C double bonds in methyl vinyl polysiloxane and the Si-H in methyl polyhydrosiloxane undergo addition reactions to form a spatial network structure, which can improve the bulk strength of silicone potting compound.

[0041] (2) The preparation process of this invention is simple and easy to promote and apply on a large scale. Detailed Implementation

[0042] To enable those skilled in the art to more clearly understand the technical solutions described in this invention, the following embodiments are provided for illustration. It should be noted that the following embodiments do not constitute a limitation on the scope of protection claimed by this invention.

[0043] Unless otherwise specified, the raw materials, reagents or devices used in the following examples are available from conventional commercial sources or can be obtained by existing known methods.

[0044] Example 1 This embodiment provides an addition-type silicone potting compound, the raw materials of which are composed of equal masses of component A and component B; by weight, component A consists of 100 parts of methyl vinyl polysiloxane, 30 parts of methyl polyhydrosiloxane, 500 parts of powder filler, 0.05 parts of inhibitor, 30 parts of crosslinking agent, and 30 parts of coupling agent; component B consists of 100 parts of methyl vinyl polysiloxane, 500 parts of powder filler, 0.5 parts of catalyst A, and 0.5 parts of catalyst B.

[0045] The methyl vinyl polysiloxane has a viscosity of 100 cps at 25°C and a structural formula of CH2=CH(CH3)2SiO[C2H5C6H5SiO]. 1 / 2 ] 40 [(C2H5)2SiO 1 / 2 ] 55 Si(CH3)2CH=CH2.

[0046] The viscosity of methylpolyhydrosiloxane at 25°C is 50 cps, and its structural formula is H(CH2)2SiO[SiMeC2H5O]. 10 [SiCH3HO 3 / 2 ] 10 [SiO2]20 Si(CH3)2H.

[0047] The powder filler is aluminum hydroxide, the inhibitor is tetramethyldivinyldisiloxane, the crosslinking agent is methyltrimethoxysilane, the coupling agent is tris(2-carboxyethyl)isocyanurate, the catalyst A is chloroplatinic acid (H2PtCl6·6H2O), the platinum content is 3000ppm, and the catalyst B is tetrabutyl titanate.

[0048] The preparation process of the above addition-type silicone potting compound is as follows: (1) Mix the raw materials of component A, namely methyl vinyl polysiloxane, methyl polyhydrosiloxane, powder filler, inhibitor, crosslinking agent and coupling agent, under vacuum conditions of 0.09 MPa for 40 min and mix them evenly; heat and stir to 110℃ and then cool to obtain component A; (2) Mix the raw materials of component B, methyl vinyl polysiloxane, powder filler, catalyst A and catalyst B under a vacuum of 0.09 MPa for 40 min until they are uniformly mixed; heat and stir to 110°C and then cool to obtain component B; (3) When using, mix component A and component B at a mass ratio of 1:1, degas under vacuum for 2 minutes, and then heat at 100°C for 15 minutes to obtain addition-type silicone potting compound.

[0049] Example 2 This embodiment provides an addition-type silicone potting compound, the raw materials of which are composed of equal masses of component A and component B; by weight, component A consists of 100 parts of methyl vinyl polysiloxane, 30 parts of methyl polyhydrosiloxane, 500 parts of powder filler, 0.05 parts of inhibitor, 30 parts of crosslinking agent, and 30 parts of coupling agent; component B consists of 100 parts of methyl vinyl polysiloxane, 500 parts of powder filler, 0.5 parts of catalyst A, and 0.5 parts of catalyst B.

[0050] The methyl vinyl polysiloxane has a viscosity of 300 cps at 25°C and a structural formula of CH2=CH(CH3)2SiO[CH3C5H. 11 SiO 1 / 2 ] 50 [(CH3)2SiO 1 / 2 ] 150 Si(CH3)2CH=CH2.

[0051] The viscosity of methylpolyhydrosiloxane at 25°C is 500 cps, and its structural formula is C6H5(CH2)2SiO[SiMeHO]. 20 [SiC2H5HO 3 / 2 ] 30 [SiO2] 200Si(H)2C6H5.

[0052] The powder filler is aluminum hydroxide, the inhibitor is acetylenecyclohexanol, the crosslinking agent is vinyltrimethoxysilane, the coupling agent is triallyl isocyanurate, catalyst A is a caster catalyst with a platinum content of 3000 ppm, and catalyst B is tetramethyl titanate.

[0053] The preparation method of the addition-type silicone potting compound in Example 2 is the same as that in Example 1.

[0054] Example 3 This embodiment provides an addition-type silicone potting compound, the raw materials of which are composed of equal masses of component A and component B; by weight, component A consists of 100 parts of methyl vinyl polysiloxane, 30 parts of methyl polyhydrosiloxane, 500 parts of powder filler, 0.05 parts of inhibitor, 30 parts of crosslinking agent, and 30 parts of coupling agent; component B consists of 100 parts of methyl vinyl polysiloxane, 500 parts of powder filler, 0.5 parts of catalyst A, and 0.5 parts of catalyst B.

[0055] The methyl vinyl polysiloxane has a viscosity of 500 cps at 25°C and a structural formula of CH2=CH(CH3)2SiO[CH3C5H. 11 SiO 1 / 2 ] 100 [(CH3)2SiO 1 / 2 ] 150 Si(CH3)2CH=CH2.

[0056] The viscosity of methylpolyhydrosiloxane at 25°C is 500 cps, and its structural formula is C6H5(CH2)2SiO[SiMeHO]. 100 [SiC2H5HO 3 / 2 ] 20 [SiO2] 120 Si(H)2C6H5.

[0057] The powder filler is aluminum hydroxide, the inhibitor is tetramethyltetravinylcyclotetrasiloxane, the crosslinking agent is methyltripropoxysilane, the coupling agent is triglycidyl isocyanurate, the catalyst A is platinum dioxide with a platinum content of 3000 ppm, and the catalyst B is tetraethyl titanate.

[0058] The preparation method of the addition-type silicone potting compound in Example 3 is the same as that in Example 1.

[0059] Example 4 This embodiment provides an addition-type silicone potting compound, the raw materials of which are composed of equal masses of component A and component B; by weight, component A consists of 100 parts of methyl vinyl polysiloxane, 30 parts of methyl polyhydrosiloxane, 500 parts of powder filler, 0.05 parts of inhibitor, 30 parts of crosslinking agent, and 30 parts of coupling agent; component B consists of 100 parts of methyl vinyl polysiloxane, 500 parts of powder filler, 0.5 parts of catalyst A, and 0.5 parts of catalyst B.

[0060] The methyl vinyl polysiloxane has a viscosity of 800 cps at 25°C and a structural formula of CH2=CH(CH3)2SiO[CH3C5H. 11 SiO 1 / 2 ] 110 [(CH3)2SiO 1 / 2 ] 200 Si(CH3)2CH=CH2.

[0061] The viscosity of methylpolyhydrosiloxane at 25°C is 500 cps, and its structural formula is C6H5(CH2)2SiO[SiMeHO]. 100 [SiC2H5HO 3 / 2 ] 20 [SiO2] 120 Si(H)2C6H5.

[0062] The powder filler is aluminum hydroxide, the inhibitor is tetramethyltetravinylcyclotetrasiloxane, the crosslinking agent is methyltripropoxysilane, the coupling agent is tris(2-hydroxyethyl)isocyanurate, the catalyst A is chloroplatinic acid, and the platinum content is 3000ppm; the catalyst B is diisopropyl titanate.

[0063] The preparation method of the addition-type silicone potting compound in Example 4 is the same as that in Example 1.

[0064] Example 5 This embodiment provides an addition-type silicone potting compound, the raw materials of which are composed of equal masses of component A and component B; by weight, component A consists of 100 parts of methyl vinyl polysiloxane, 30 parts of methyl polyhydrosiloxane, 500 parts of powder filler, 0.05 parts of inhibitor, 30 parts of crosslinking agent, and 30 parts of coupling agent; component B consists of 100 parts of methyl vinyl polysiloxane, 500 parts of powder filler, 0.5 parts of catalyst A, and 0.5 parts of catalyst B.

[0065] The methyl vinyl polysiloxane has a viscosity of 1000 cps at 25°C and a structural formula of CH2=CH(CH3)2SiO[CH3C5H. 11 SiO 1 / 2 ] 130 [(CH3)2SiO 1 / 2] 230 Si(CH3)2CH=CH2.

[0066] The viscosity of methylpolyhydrosiloxane at 25°C is 500 cps, and its structural formula is C6H5(CH2)2SiO[SiMeHO]. 100 [SiC2H5HO 3 / 2 ] 20 [SiO2] 120 Si(H)2C6H5.

[0067] The powder filler is aluminum hydroxide, the inhibitor is tetramethyltetravinylcyclotetrasiloxane, the crosslinking agent is methyltripropoxysilane, the coupling agent is tris(2-acryloyloxyethyl)isocyanurate, the catalyst A is chloroplatinic acid with a platinum content of 3000 ppm, and the catalyst B is n-butyl titanate.

[0068] The preparation method of the addition-type silicone potting compound in Example 5 is the same as that in Example 1.

[0069] Comparative Example 1 The only difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not contain a coupling agent; otherwise, they are the same as Example 1.

[0070] Comparative Example 2 The only difference between Comparative Example 2 and Example 1 is that Comparative Example 2 uses an equal amount of the coupling agent γ-aminopropyltriethoxysilane (KH-550) to replace tris(2-carboxyethyl) isocyanurate, while the rest is the same as in Example 1.

[0071] Comparative Example 3 The only difference between Comparative Example 3 and Example 1 is that Comparative Example 3 uses an equal amount of coupling agent γ-(2,3-epoxypropoxy)propyltrimethoxysilane (KH-560) to replace tris(2-carboxyethyl)isocyanurate, while the rest is the same as Example 1.

[0072] Comparative Example 4 The only difference between Comparative Example 4 and Example 1 is that Comparative Example 4 uses an equal amount of coupling agent γ-(methacryloyloxy)propyltrimethoxysilane (KH-570) to replace tris(2-carboxyethyl) isocyanurate, while the rest is the same as in Example 1.

[0073] Comparative Example 5 The only difference between Comparative Example 5 and Example 1 is that the amount of coupling agent used in Comparative Example 5 is 1 part, and everything else is the same as in Example 1.

[0074] Comparative Example 6 The only difference between Comparative Example 6 and Example 1 is that the amount of coupling agent used in Comparative Example 6 is 60 parts, while the rest is the same as in Example 1.

[0075] Performance testing The addition-type silicone potting compounds prepared in Examples 1-5 and Comparative Examples 1-6 were subjected to performance tests. The test items and methods are as follows: Viscosity: Tested according to GB / T 10247; Al / Al shear strength: tested according to GB / T 7124.

[0076] The performance test results of the addition-type silicone potting compounds in Examples 1-5 and Comparative Examples 1-6 are shown in Table 1.

[0077] Table 1: Performance test results of addition-type silicone potting compounds in Examples 1-5 and Comparative Examples 1-6

[0078] As shown in Table 1, when the coupling agents are tris(2-carboxyethyl) isocyanurate, triallyl isocyanurate, triglycidyl isocyanurate, tris(2-hydroxyethyl) isocyanurate, and tris(2-acryloyloxyethyl) isocyanurate, the viscosity of the silicone potting compound at 25°C is 1800-2800 cps, and the Al / Al bond shear strength reaches more than 2 MPa, indicating good bonding performance.

[0079] As can be seen from the comparison between Example 1 and Comparative Examples 1 and 5, when no coupling agent is added or the amount of coupling agent added is insufficient, the shear strength of the silicone potting compound is very weak, less than 1.0 MPa, and it relies more on the adsorption force between the silicone potting compounds.

[0080] As can be seen from the comparison between Example 1 and Comparative Example 6, when the coupling agent is in excess, the shear strength of the silicone potting compound actually decreases. This is because the coupling agent increases the viscosity of the silicone potting compound, which makes the wettability of the silicone potting compound to the substrate worse, thereby reducing the shear strength of the silicone potting compound.

[0081] As can be seen from the comparison between Example 1 and Comparative Examples 2-4, when the coupling agent is KH-550 or KH-570, because these two coupling agents contain amino groups, these groups will poison the platinum catalyst, causing the adhesive to fail to cure; when the coupling agent is KH-560, the shear strength of the silicone potting compound is only 1.2 MPa, and the improvement of the adhesion of the silicone potting compound is small.

[0082] In summary, this invention improves the adhesion of silicone potting compounds by hydrolyzing and condensing crosslinking agents and specific types of coupling agents under the action of titanate catalysts, thereby bonding with hydrogen bonds on the substrate and achieving an Al / Al shear strength of over 2 MPa. Furthermore, under the action of a platinum catalyst, the C=C double bonds in methyl vinyl polysiloxane and the Si-H bonds in methyl polyhydrosiloxane undergo addition reactions to form a spatial network structure, which can enhance the bulk strength of the silicone potting compound.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An addition-type silicone encapsulant, characterized by, The preparation raw materials of the addition type silicone pouring sealant include an A component and a B component; The A component includes methyl vinyl polysiloxane, methyl polyhydrogen siloxane, crosslinking agent, coupling agent; The B component includes methyl vinyl polysiloxane, catalyst A, catalyst B; The catalyst A includes platinum gold catalyst; the catalyst B includes titanate catalyst.

2. The addition type silicone sealant according to claim 1, wherein CH2=CH(CH3)2SiO[R4R5SiO 1 / 2 ] a [(R4)2SiO 1 / 2 ] b Si(CH3)2R6, wherein R4 is selected from any one of C1-C5 linear or branched alkyl, phenyl, R5 is selected from any one of C1-C5 linear or branched alkyl, phenyl, R6 is selected from any one of -CH=CH2, C1-C5 linear or branched alkyl, phenyl, and a and b are independently selected from any integer from 40 to 1000; And / or, the viscosity of the methyl vinyl polysiloxane at 25℃ is 10-1000cps.

3. The addition type silicone sealant according to claim 1, wherein R7(CH2)2SiO[SiMeR8O]mSi(CH2)2R7 m [SiR9HO 3 / 2 ] n [SiO2] s Si(R 10 )2R 11 ; wherein R7, R8, R9, R 10 and R 11 are independently selected from one of -H, C1-C5 straight chain or branched alkyl, phenyl; m, n and s are independently selected from any integer between 10 and 200; And / or, the viscosity of the methyl polyhydrogen siloxane at 25℃ is 5-500cps.

4. The addition type silicone sealant according to claim 1, wherein The crosslinking agent includes at least one of methyl trimethoxysilane, ethyl trimethoxysilane, propyl trimethoxysilane, methyl triethoxysilane, ethyl triethoxysilane, vinyl trimethoxysilane; And / or, the coupling agent includes at least one of tris (2-carboxyethyl) isocyanurate, triallyl isocyanurate, triglycidyl isocyanurate, tris (2-hydroxyethyl) isocyanurate, tris (2-acryloyloxyethyl) isocyanurate.

5. The addition type silicone encapsulant according to any one of claims 1 to 4, characterized in that, The A component includes methyl vinyl polysiloxane 100 parts, methyl polyhydrogen siloxane 4.5-55 parts, crosslinking agent 4.5-55 parts, coupling agent 4.5-55 parts by weight; And / or, the B component includes methyl vinyl polysiloxane 100 parts, catalyst A 0.1-2.2 parts, catalyst B 0.01-1.1 parts by weight.

6. The addition type silicone encapsulant according to any one of claims 1 to 4, characterized in that, The A component further includes filler, inhibitor; and / or, the B component further includes filler.

7. The addition type silicone sealant according to claim 6, wherein The A component includes methyl vinyl polysiloxane 100 parts, methyl polyhydrogen siloxane 4.5-55 parts, crosslinking agent 4.5-55 parts, coupling agent 4.5-55 parts, filler 100-1000 parts, inhibitor 0.01-0.1 parts by weight; And / or, the B component includes methyl vinyl polysiloxane 100 parts, catalyst A 0.1-2.2 parts, catalyst B 0.01-1.1 parts, filler 90-1100 parts by weight.

8. The addition type silicone sealant according to claim 7, wherein The filler includes at least one of aluminum hydroxide, quartz sand, silicon powder, aluminum oxide, kaolin; And / or, the inhibitor includes at least one of ethynyl cyclohexanol, diallyl formamide, tetramethyl divinyl disiloxane, tetramethyl tetra vinyl cyclo tetra siloxane, diallyl fumarate; And / or, the mass ratio of the A component and the B component is 1: (0.8-1.2).

9. The method of producing the addition-type silicone encapsulant according to any one of claims 1 to 8, characterized by, The preparation method includes the following steps: Mixing each raw material component of the A component to obtain the A component; Mixing each raw material component of the B component to obtain the B component; The A component and the B component constitute the addition type silicone pouring sealant.

10. The addition type silicone pouring sealant according to any one of claims 1-8 is applied in electronic appliances.

Images