Dual-component silica gel material and preparation method and application thereof

A two-component, silica gel technology, applied in the field of high temperature resistant silica gel, can solve the problems of slow curing speed, not suitable for large-scale industrial production, poor product stability, etc., achieve excellent high and low temperature impact resistance, shorten curing time, and high reliability sexual effect

Inactive Publication Date: 2016-04-13
陕西工业职业技术学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One-component room temperature vulcanized silicone rubber (such as 704 silicone rubber) can be used for a long time in the range of -50 ° C to 250 ° C, although it is a one-component room temperature vulcanized silicon rubber with good adhesion, high strength and non-corrosiveness. Rubber, but the one-component silica gel belongs to the dealcoholized condensation type silica gel, and its reaction mechanism is that the silica gel solidifies and forms by contacting the water molecules in the air and the water molecules on the surface of the adherend, which leads to its slow curing speed (general curing Time exceeds 24h), product stability is poor, so it is not suitable for large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Component A includes the following raw materials in weight percentage: 22 parts of vinyl silicone oil, 3 parts of hydrogen-containing silicone oil, 0.002 part of inhibitor, 0.8 part of antioxidant, and 75 parts of ceramic powder. Wherein, the inhibitor is ethynyl cyclohexanol; the antioxidant is 168 of Nanjing Milan Chemical Company; the ceramic powder is a mixed powder in iron oxide and alumina, and the mass fraction ratio of the two is 3:2, and the The particle size is 800nm~1200nm.

[0027] Component B includes the following raw materials in weight percent: 20 parts of vinyl silicone oil, 3 parts of tackifier, 0.0015 parts of catalyst, 0.6 part of antioxidant, and 78 parts of ceramic powder. Among them, the tackifier is vinyl glycidyl ether; the catalyst is platinum (0)-1,3-diethylene-1,1,3,3-tetramethyldisiloxane; the antioxidant is Nanjing Milan Chemical Co., Ltd. The company's 1076; ceramic powder is a mixed powder of tin dioxide and alumina, the mass fraction ra...

Embodiment 2

[0032] Component A includes the following raw materials in weight percentage: 25 parts of vinyl silicone oil, 3 parts of hydrogen-containing silicone oil, 0.003 parts of inhibitor, 0.5 part of antioxidant, and 72 parts of ceramic powder. Among them, the inhibitor is ethynyl cyclohexanol; the antioxidant is a mixture of 168, 1076 and 2246 from Nanjing Milan Chemical Company; the ceramic powder is zinc oxide, and the particle size of the ceramic powder is 1000nm.

[0033] Component B includes the following raw materials in weight percent: 20 parts of vinyl silicone oil, 3 parts of tackifier, 0.0015 parts of catalyst, 0.6 part of antioxidant, and 78 parts of ceramic powder. Among them, the tackifier is a mixture of vinyl glycidyl ether and butanediol diglycidyl ether; the catalyst is tetrakistriphenylphosphine platinum; the antioxidant is a mixture of 168, 1076 and 2246 from Nanjing Milan Chemical Company; ceramic powder The body is zinc oxide, and the particle size of the cerami...

Embodiment 3

[0038] Component A includes the following raw materials in weight percentage: 25 parts of vinyl silicone oil, 3 parts of hydrogen-containing silicone oil, 0.003 parts of inhibitor, 0.5 part of antioxidant, and 72 parts of ceramic powder. Among them, the inhibitor is ethynyl cyclohexanol; the antioxidant is a mixture of 300, 1024 and 2246 from Nanjing Milan Chemical Company; the ceramic powder is magnesium oxide, and the particle size of the ceramic powder is 500nm.

[0039]Component B includes the following raw materials in weight percent: 20 parts of vinyl silicone oil, 3 parts of tackifier, 0.0015 parts of catalyst, 0.6 part of antioxidant, and 78 parts of ceramic powder. Among them, the tackifier is silane coupling agent KH560; the catalyst is platinum-chitosan / halloysite nanotube supported catalyst; the antioxidant is a mixture of 300, 1024 and 2246 from Nanjing Milan Chemical Co., Ltd.; ceramic powder It is magnesium oxide, and the particle size of the ceramic powder is 5...

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Abstract

The invention relates to the technical field of high-temperature-resistant silica gel and particularly discloses a dual-component silica gel material and a preparation method and application thereof. The dual-component silica gel material is prepared from a component A and a component B. The component A is prepared from vinyl silicon oil, hydrogen containing silicone oil, an inhibitor, ceramic powder and antioxygen. The component B is prepared from vinyl silicon oil, a tackifying agent, a catalyst, ceramic powder and antioxygen. The raw materials of the component A and the raw materials of the component B are placed in stainless steel or ceramic lined tanks according to the mass ratio to be mixed and stirred and ground and dispersed through a ceramic three-roller grinding machine, heavy paste A and heavy paste B are prepared, the heavy paste A and the heavy paste B are mixed according to the mass ratio of 1:1 during use, the curing temperature ranges from 150 DEG C to 200 DEG C, and curing time ranges from 1 h to 2 h. The product is used for binding and sealing of ceramic heating sheets and aluminum sheets of a PTC heater, the heat-resistant performance and binding performance of the PTC heater are improved, the service life is prolonged, production cost is reduced, and the material is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of high-temperature resistant silica gel, in particular to a two-component silica gel material and its preparation method and application. Background technique [0002] PTC (PositiveTemperatureCoefficient, thermistor) heater adopts PTCR (positive temperature thermistor) thermal ceramic element, which is composed of several single pieces combined with corrugated heat-dissipating aluminum strips and bonded with high-temperature adhesive. The advantage of high thermal efficiency. Its biggest advantage lies in its safety, as follows: when the fan fails to stop working, the power of the PTC heater will drop rapidly due to the inability to dissipate heat sufficiently. At this time, the surface temperature of the heater will be controlled near the Curie temperature, thereby It effectively avoids the "redness" phenomenon on the surface of the electric heating tube heater, and eliminates the hidden danger of acciden...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J183/05C09J11/04C09J11/06H05B3/10
CPCC09J183/04C08K2201/014C08L2201/08C08L2203/20C08L2205/025C08L2205/03C09J11/04C09J11/06H05B3/10C08L83/04C08K13/02C08K2003/2265C08K2003/2227C08K2003/2231C08K5/05C08K2003/2296C08K5/1515C08K2003/222C08K3/36
Inventor 齐锴亮
Owner 陕西工业职业技术学院
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