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Heat-conducting silica gel and continuous production process and equipment thereof

A technology of heat-conducting silica gel and production technology, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of single cylinder and low labor intensity, and achieve the effects of improving compatibility, reducing labor intensity, and fully mixing

Pending Publication Date: 2021-03-02
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention mainly aims at the disadvantages that the current traditional production methods and devices are difficult to scale up and uninterruptedly prepare high thermal conductivity addition-type organic silica gel products. , intermittent production problems; the second purpose of the present invention is to provide a non-stop continuous production equipment for the heat-conducting silica gel, which has simple structure, high efficiency, large production capacity, fewer operating positions, and low labor intensity.

Method used

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  • Heat-conducting silica gel and continuous production process and equipment thereof
  • Heat-conducting silica gel and continuous production process and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 , figure 2 As shown, a continuous production equipment for heat-conducting silica gel of the present invention includes a first twin-screw machine and a second twin-screw machine, and the first terminal outlet of the first twin-screw machine is connected to the second end of the second twin-screw machine. The feeding port in the front section is connected, and also includes the first feeder, the second feeder, the third feeder, the first metering pump, the second metering pump, and the third metering pump,

[0044] The first feeder and the first metering pump are sequentially connected to the first front-stage feeding port of the first twin-screw machine;

[0045] The second feeder and the second metering pump are sequentially connected to the first middle section feed port of the first twin-screw machine;

[0046] The third feeder and the third metering pump are sequentially connected to the second middle stage feed port of the second twin-screw mac...

Embodiment 2

[0060] The difference between this embodiment and embodiment 1 is:

[0061] The length-to-diameter ratios of the first twin-screw machine and the second twin-screw machine are both 12:1.

[0062] In terms of mass fraction, the ratio of each raw material is as follows: 45 parts of vinyl-terminated polydimethylsilane resin, 7 parts of dimethyl silicone oil, 12 parts of toughening and tackifying resin, 15 parts of reinforcing filler, 11 parts of high thermal conductivity filler, 5 parts of hydrogen-containing silicone oil, 1 part of platinum catalyst, 2 parts of volatile catalyst inhibitor, and 2 parts of coupling agent.

[0063] The toughening and tackifying resin is reactive liquid nitrile rubber, the reinforcing filler is fumed titanium dioxide, and the high thermal conductivity filler is an average particle diameter D 50 It is ultrafine silicon carbide of 10-30um, the volatile catalytic inhibitor is ethynyl cyclohexanol, and the coupling agent is vinyltrimethoxysilane.

[0...

Embodiment 3

[0066] The difference between this embodiment and embodiment 2 is:

[0067] The length-to-diameter ratio of the screw of the first twin-screw machine is 9:1, and the length-to-diameter ratio of the screw of the second twin-screw machine is 6:1.

[0068] In terms of mass fraction, the proportions of each raw material are as follows: 42 parts of vinyl-terminated polydimethylsilane resin, 4 parts of dimethyl silicone oil, 10 parts of toughening and tackifying resin, 8 parts of reinforcing filler, 30 parts of high thermal conductivity filler, 3.5 parts of hydrogen-containing silicone oil, 0.5 parts of platinum catalyst, 1 part of volatile catalytic inhibitor, and 1 part of coupling agent.

[0069] The toughening and tackifying resin is reactive liquid nitrile rubber, the reinforcing filler is precipitated silica, and the high thermal conductivity filler is an average particle diameter D 50 The volatile catalyst inhibitor is 2-methyl-3-butyn-2-ol, and the coupling agent includes v...

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Abstract

The invention discloses heat-conducting silica gel and a continuous production process and equipment thereof. The equipment comprises a first double-screw machine and a second double-screw machine, afirst tail-section discharging port of the first double-screw machine is connected with a second front-section feeding port of the second double-screw machine, the equipment further comprises a firstfeeding machine, a second feeding machine, a third feeding machine, a first metering pump, a second metering pump and a third metering pump, the first feeding machine and the first metering pump are sequentially connected with a first front-section feeding port of the first double-screw machine, the second feeding machine and the second metering pump are sequentially connected with a first middle-section feeding hole of the first double-screw machine, the third feeding machine and the third metering pump are sequentially connected with a second middle-section feeding hole of the second double-screw machine, a heating jacket and a vacuumizing device are arranged on the first double-screw machine, and a chilled water jacket and a protective gas filling device are arranged on the second double-screw machine. Continuous large-scale production of the heat-conducting silica gel is realized, the production efficiency can be greatly improved, the labor intensity is reduced, and post workers are reduced.

Description

technical field [0001] The invention relates to the field of preparation of heat-conducting silicone rubber materials, in particular to a heat-conducting silica gel and its continuous production process and equipment. Background technique [0002] Due to their good physical and chemical properties and environmental friendliness, silicone compositions have been widely used in people's production and life. The synthesis, modification and preparation of such materials have always been one of the focuses of the chemical industry. Among them, the Chinese invention patent with the application number of 201310331297.5 discloses the process technology and production equipment for the continuous production of thermal silica gel. The machine realizes the continuous production of condensation polymerization type (polycondensation type) thermal conductive silica gel. At present, for the one-component condensation polymerization type silica gel, it is only necessary to strictly control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/385B29C48/39B29C48/625B29C48/285B29C31/06B29C31/10C08L83/07C08L83/05C08L83/04C08K13/04C08K7/26C08K3/36C08K3/34C08K7/20C08K7/18C09K5/14
CPCB29C48/385B29C48/39B29C48/625B29C48/286B29C48/297B29C31/06C08L83/04C09K5/14C08L2205/025
Inventor 林益军黄活阳马彦
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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