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Dealcoholized high-thermal-conductivity single-component room-temperature vulcanized silicone rubber adhesive and preparation method thereof

A room temperature vulcanization, high thermal conductivity technology, used in the rubber field, can solve the problems of inability to prepare high thermal conductivity, increase in filler filling, and decrease in thermal conductivity, and achieve excellent bond strength, increase in filling, and improve the effect of dispersion.

Pending Publication Date: 2022-07-01
QINGDAO ZHUOYOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alumina superfine powder is easy to agglomerate due to its small particle size. It is difficult to break the agglomeration by ordinary processing technology. If the thermal conductivity is small, the agglomeration can be partially opened by three-roll grinding, but it is time-consuming and labor-intensive. , the surface of large particle size will be partially destroyed, the thermal conductivity will decrease, and it is impossible to prepare products with high thermal conductivity
In addition, due to the partial incompatibility of alumina and room temperature vulcanized silicone rubber, the addition of surface treatment is limited, and the filler is treated with a single filler surface treatment agent, the increase in filler filling is limited, and the thermal conductivity is also limited.

Method used

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  • Dealcoholized high-thermal-conductivity single-component room-temperature vulcanized silicone rubber adhesive and preparation method thereof
  • Dealcoholized high-thermal-conductivity single-component room-temperature vulcanized silicone rubber adhesive and preparation method thereof
  • Dealcoholized high-thermal-conductivity single-component room-temperature vulcanized silicone rubber adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The dealcoholized high thermal conductivity one-component RTV silicone rubber adhesive of this example is prepared from the following raw materials in parts by weight:

[0029] 100 parts of dihydroxy polydimethylsiloxane with a viscosity of 2000cP, 30 parts of dimethicone with a viscosity of 100cP

[0030] 1900 parts of alumina, 5 parts of triisostearoyl isopropyl titanate, 2 parts of γ-(2,3-glycidoxy)propyltrimethoxysilane, 50cP dihydroxy polydimethylsiloxane 8 parts, 11 parts of methyltrimethoxysilane, 3 parts of ethyl acetoacetate-isopropyl titanate chelate, 1 part of γ-aminopropyltriethoxysilane

[0031] The above-mentioned raw materials are prepared according to the following steps:

[0032] (1) Dihydroxy polydimethylsiloxane, 15 parts of dimethicone oil, and alumina with a particle size of ≤20 μm are stirred evenly in a planetary mixer;

[0033] (2) Add the remaining 15 parts of dimethyl silicone oil, 30-90 μm alumina, and simultaneously add triisostearoyl isopr...

Embodiment 2

[0036] The dealcoholized high thermal conductivity one-component RTV silicone rubber adhesive of this example is prepared from the following raw materials in parts by weight:

[0037] 100 parts of dihydroxy polydimethylsiloxane with a viscosity of 2000cP, 30 parts of dimethicone with a viscosity of 50cP

[0038] 2000 parts of alumina, 6 parts of triisostearoyl isopropyl titanate, 3 parts of γ-(2,3-glycidoxy)propyltrimethoxysilane, 50cP dihydroxy polydimethylsiloxane 8 parts, 11 parts of methyltrimethoxysilane, 3 parts of ethyl acetoacetate-isopropyl titanate chelate, 0.5 part of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane

[0039] The above-mentioned raw materials are prepared according to the following steps:

[0040] (1) Dihydroxy polydimethylsiloxane, 15 parts of dimethicone oil, and alumina with a particle size of ≤20 μm are stirred evenly in a planetary mixer;

[0041] (2) Add the remaining 15 parts of dimethyl silicone oil, 30-90 μm alumina, and simultaneously add t...

Embodiment 3

[0044] The dealcoholized high thermal conductivity one-component RTV silicone rubber adhesive of this example is prepared from the following raw materials in parts by weight:

[0045] 100 parts of dihydroxy polydimethylsiloxane with a viscosity of 1000cP, 30 parts of dimethicone with a viscosity of 50cP

[0046] 2050 parts of alumina, 7 parts of isopropyl triisostearoyl titanate; 3 parts of γ-(2,3-glycidoxy)propyltrimethoxysilane, 50cP dihydroxy polydimethylsiloxane 8 parts, 3 parts of vinyltrimethoxysilane, 9 parts of methyltrimethoxysilane, 3 parts of ethyl acetoacetate isopropyl titanate chelate, N-(β-aminoethyl)-γ-aminopropyl 0.5 part of trimethoxysilane

[0047] The above-mentioned raw materials are prepared according to the following steps:

[0048] (1) Dihydroxy polydimethylsiloxane, 15 parts of dimethicone oil, and alumina with a particle size of ≤20 μm are stirred evenly in a planetary mixer;

[0049] (2) Add the remaining 15 parts of dimethyl silicone oil, 30-90 μ...

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Abstract

The invention discloses a dealcoholization type high-thermal-conductivity single-component room-temperature vulcanized silicone rubber adhesive and a preparation method, and relates to the field of room-temperature vulcanized silicone rubber, the dealcoholization type high-thermal-conductivity single-component room-temperature vulcanized silicone rubber adhesive comprises the following components by mass: 100 parts of dihydroxy polydimethylsiloxane, 5-50 parts of dimethyl silicone oil, 1900-2500 parts of aluminum oxide, 0.1-0.5 part of a coupling agent, 0.1-0.5 part of an antioxidant, 0.1-0.5 part of a coupling agent, and 0.1-0.5 part of a lubricant. The adhesive is prepared from the following components in parts by weight: 5-10 parts of a surface treating agent, 2-15 parts of a thixotropic agent, 5-20 parts of a cross-linking agent, 1-5 parts of a catalyst and 0.1-3 parts of a tackifier. According to the dealcoholized high-thermal-conductivity single-component room-temperature vulcanized silicone rubber adhesive disclosed by the invention, the surface treating agent is used for cooperatively treating the thermal conductive filler, so that the thermal conductivity of the adhesive is greatly improved; the preparation method is simple in process, easy to produce and good in economic benefit.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a dealcoholized high thermal conductivity one-component room temperature vulcanized silicone rubber adhesive and a preparation method. Background technique [0002] The room temperature vulcanized silicone rubber itself has poor thermal conductivity, and the thermal conductivity is generally only 0.2W / m·K. It is necessary to add thermal conductive fillers to improve the thermal conductivity. The commonly used α-phase alumina is alumina. With the increase of the filling amount of alumina filler, the viscosity of the silicone rubber system increases, and the maximum filling amount of alumina with a single particle size is limited. In order to increase the filling amount to better improve the thermal conductivity of RTV silicone rubber, different shapes are different The matching between the particle size alumina fillers is very important, and the addition amount of non-spherical alu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04
CPCC09J183/04C09J11/04C08K2003/2227C08K2201/005C08L83/04C08K3/22C08K9/04C08K9/06
Inventor 吴伟张佩斐
Owner QINGDAO ZHUOYOU NEW MATERIAL