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A kind of two-component potting silica gel and its preparation method and potting method

A two-component, potting technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problems of uneven cells, easy contamination of the surface, large pore size, etc., and achieve excellent impact resistance and foaming Multiplier control, the effect of easy foaming multiplier

Active Publication Date: 2018-12-04
GUANGZHOU RUIHE SILICONE RUBBER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing foamed silica gel is foamed and vulcanized at the same time, and there are problems such as difficult control of foaming ratio, uneven cell size, large pore size, large thermal expansion coefficient, easy contamination of the surface and accumulation of pollutants, etc., especially in small When electronic equipment is sealed, the airtightness will be greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A two-component potting silica gel, including A and B two components, A component includes the following raw materials in parts by mass: 100 parts of vinyl silicone oil, 0.5 parts of acrylic hollow micropowder, 0.5 parts of platinum complex catalyst; The following raw materials are included in parts by mass: 100 parts of vinyl silicone oil, 100 parts of polydimethylsiloxane, 5 parts of acrylic hollow micropowder, 0.4 part of acetylenic alcohol inhibitor, 15 parts of hydrogen-containing silicone oil, and 3 parts of black paste. Wherein, the hydrogen content of the hydrogen-containing silicone oil is 0.01 wt%. The vinyl silicone oil is α, ω-divinyl polydimethylsiloxane, and the vinyl content is 0.08wt%. The black pulp is a mixture of high-pigment carbon black and silicone oil, wherein the mass percentage of high-pigment carbon black is 10%.

[0025] The preparation method of two-component potting silica gel of the present invention comprises the following steps:

[0026...

Embodiment 2

[0031] A two-component potting silica gel, including A and B two components, A component includes the following raw materials in parts by mass: 100 parts of vinyl silicone oil, 50 parts of polydimethylsiloxane, 5 parts of glass hollow microspheres, 1 part of white paste, 0.1 part of platinum complex catalyst; component B includes the following raw materials by mass: 100 parts of vinyl silicone oil, 50 parts of polydimethylsiloxane, 5 parts of glass hollow microspheres, acetylenic alcohol inhibitor 0.02 parts of agent, 40 parts of hydrogen-containing silicone oil, and 1 part of black paste. Wherein, the hydrogen content of the hydrogen-containing silicone oil is 0.03 wt%. The vinyl silicone oil is α, ω-divinyl polydimethylsiloxane, and the vinyl content is 0.6wt%. The white slurry is a mixture of titanium dioxide and silicone oil, wherein the mass percentage of titanium dioxide is 50%. The black slurry is a mixture of high-pigment carbon black and silicone oil, wherein the ma...

Embodiment 3

[0038] A two-component potting silica gel, including A and B two components, A component includes the following raw materials in parts by mass: 100 parts of vinyl silicone oil, 30 parts of polydimethylsiloxane, 9 parts of acrylic hollow micropowder, platinum 1 part of complex catalyst; Component B includes the following raw materials by mass: 100 parts of vinyl silicone oil, 30 parts of polydimethylsiloxane, 0.8 parts of acrylic acid hollow powder, 1 part of acetylenic alcohol inhibitor, hydrogen-containing silicone oil 10 servings. Wherein, the hydrogen content of hydrogen-containing silicone oil is 0.8wt%. The vinyl silicone oil is α, ω-divinyl polydimethylsiloxane, and the vinyl content is 0.1 wt%.

[0039] The preparation method of two-component potting silica gel of the present invention comprises the following steps:

[0040] 1) Preparation of component A: Add 1000g vinyl silicone oil, 300g polydimethylsiloxane, 10g platinum complex catalyst and 90g acrylic hollow micr...

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Abstract

The invention discloses double-component pouring silica gel. The double-component pouring silica gel comprises a component A and a component B. The component A comprises, by weight, 100 parts of vinyl silicone oil, 0-100 parts of non-reactive silicone oil, 0.05-10 parts of hollow micro-powder, 0.01-1.5 parts of transition metal complex catalysts and 0-3 parts of white paste; the component B comprises, by weight, 100 parts of vinyl silicone oil, 0-100 parts of non-reactive silicone oil, 0.05-10 parts of hollow micro-powder, 0.01-1 part of alkynol inhibitors, 10-40 parts of hydrogen-containing silicone oil and 0-3 parts of black paste. The double-component pouring silica gel has the advantages that the hollow micro-powder is used as a pre-foam filler, so that stable foam is available in the component A and the component B before the double-component pouring silica gel is used, and the double-component pouring silica gel is low in density and small in pore diameter, and foam holes are uniform; the double-component pouring silica gel is used as a pore closing material and is excellent in impact resistance, rebounding performance, softness, sound insulation, waterproof performance and steam-proof performance, and the like.

Description

technical field [0001] The invention relates to the technical field of polymer compounding, in particular to a two-component potting silica gel, a preparation method thereof and a potting method. Background technique [0002] Low-density silica gel foam material is a porous polymer elastic material prepared by foaming and curing silica gel, so it can be used as an excellent protective material. In the electronics industry, in order to prevent moisture, dust, and harmful gases from damaging outdoor electronic equipment, and to slow down vibration and prevent external damage, outdoor electronic equipment needs to be potted with foamed silica gel to minimize the adverse effects of the outside world. The existing foamed silica gel is foamed and vulcanized at the same time, and there are problems such as difficult control of foaming ratio, uneven cell size, large pore size, large thermal expansion coefficient, easy contamination of the surface and accumulation of pollutants, etc....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/07C09J183/04C09J11/08C09J11/04C09K3/10
CPCC08L2205/025C08L2205/035C09J11/04C09J11/08C09J183/04C09K3/10C08L83/04C08L33/00C08K3/04C08K2003/2241C08K7/28
Inventor 王岩周长伟乔根
Owner GUANGZHOU RUIHE SILICONE RUBBER TECH CO LTD
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