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Addition-type organic silicon pouring sealant and preparation method thereof

A silicone potting and addition molding technology, applied in the directions of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems that affect the thermal conductivity and flame retardant properties of the potting glue, and the potting glue is difficult to disperse evenly.

Active Publication Date: 2018-03-13
HANGZHOU ZHIJIANG SILICONE CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When agglomeration occurs, it is difficult to disperse the potting compound evenly, which will seriously affect the thermal conductivity and flame retardancy of the potting compound.

Method used

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  • Addition-type organic silicon pouring sealant and preparation method thereof
  • Addition-type organic silicon pouring sealant and preparation method thereof
  • Addition-type organic silicon pouring sealant and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0039] The present invention provides a method for preparing the addition-type silicone potting compound described in the above technical solution, comprising the following steps:

[0040] Mix 100 parts of vinyl silicone oil, 0-100 parts of dimethyl silicone oil, 1-50 parts of hydrogen-containing silicone oil, 20-250 parts of aluminum hydroxide, 0-200 parts of thermal conductive filler and 1-50 parts of nano-calcium carbonate, and heat to After dehydration at 100-150°C for 2-4 hours, vacuumize, lower the temperature to below 70°C, add 0.01-1 part of inhibitor, stir evenly, and obtain component A;

[0041] Mix 100 parts of vinyl silicone oil, 0-100 parts of dimethyl silicone oil, 20-250 parts of aluminum hydroxide, 0-200 parts of thermal conductive filler, 1-50 parts of nano-calcium carbonate and 0-10 parts of color paste, and heat to 100 After ~150°C, dehydrate for 2~4 hours, vacuumize, cool down to below 70°C, add 0.01~1 part of platinum catalyst, stir evenly, and obtain B co...

Embodiment 1

[0048] Component A: Put vinyl-terminated silicone oil, dimethyl silicone oil, hydrogen-containing silicone oil, aluminum hydroxide, and nano-calcium carbonate into the high-speed dispersing planetary machine according to the formula in Table 1 and stir, while heating to 100-150°C. Vacuum dehydration at -0.09~-0.1MPa for 2~4 hours, after dehydration, cool down to within 70°C, add inhibitor, stir evenly and discharge to obtain component A.

[0049] Component B: Put vinyl-terminated silicone oil, dimethyl silicone oil, aluminum hydroxide, nano-calcium carbonate, and color paste into the high-speed dispersing planetary machine according to the formula in Table 1 and stir, while heating to 100-150°C. Vacuum dehydration at -0.09~-0.1MPa for 2~4 hours, after dehydration, lower the temperature to less than 70°C, add platinum catalyst, stir evenly, and discharge to obtain component B.

[0050] Test the viscosity of component A and component B, and take part of component A and component...

Embodiment 2

[0058] Component A: Put vinyl-terminated silicone oil, dimethyl silicone oil, hydrogen-containing silicone oil, aluminum hydroxide, and nano-calcium carbonate into the high-speed dispersing planetary machine according to the formula in Table 3 and stir, while heating to 100-150°C. Vacuum dehydration at -0.09~-0.1MPa for 2~4 hours, after dehydration, cool down to within 70°C, add inhibitor, stir evenly, and discharge to obtain component A.

[0059] Component B: Put vinyl-terminated silicone oil, dimethyl silicone oil, aluminum hydroxide, nano-calcium carbonate, and color paste into the high-speed dispersing planetary machine according to the formula in Table 3 and stir, while heating to 100-150°C, Vacuum dehydration at -0.09~-0.1MPa for 2~4 hours, after dehydration, lower the temperature to less than 70°C, add platinum catalyst, stir evenly, and discharge to obtain component B.

[0060] Test the viscosity of A and B components, and take part A and B glues according to the weigh...

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Abstract

The invention provides an addition-type organic silicon pouring sealant and a preparation method thereof. The pouring sealant is prepared from a component A and a component B in parts by weight, wherein the component A comprises the following raw materials in parts by weight: 100 parts of vinyl silicone oil, 0-100 parts of dimethyl silicone oil, 1-50 parts of hydrogen-containing silicone oil, 20-250 parts of aluminum hydroxide, 0-200 parts of heat conduction fillers, 1-50 parts of nano-calcium carbonate and 0.01-1 part of an inhibitor; and the component B comprises the following raw materialsin parts by weight: 100 parts of vinyl silicone oil, 0-100 parts of dimethyl silicone oil, 20-250 parts of aluminum hydroxide, 0-200 parts of heat conduction fillers, 1-50 parts of nano-calcium carbonate, 0.01-1 part of a platinum catalyst and 0-10 parts of color paste. Through the synergistic effect of the components, the pouring sealant is high in sedimentation resistance, thermal conductivity and flame retardance. The caking time is at least more than three months after the pouring sealant starts settling, the heat conductivity coefficient is 0.4-0.7 W.m<-1>.k<-1>, and the flame retardant rating reaches V-0.

Description

technical field [0001] The invention relates to the technical field of silicone sealants, in particular to an addition-type silicone potting compound and a preparation method thereof. Background technique [0002] Silicone addition type potting adhesive is a two-component potting adhesive, which is mainly prepared from base rubber, curing agent, thermally conductive and flame retardant filler, catalyst, inhibitor, etc., and is used according to the volume ratio or weight of 1:1 After mixing evenly, it can be cured into elastomer at room temperature or under heating conditions. Before curing, it has very good fluidity and fast curing speed. When curing, the inside and outside are cured at the same time. The cured elastomer has good thermal conductivity. Flame retardant performance, sealing performance, waterproof performance, vibration damping performance, etc., the operating temperature is generally between -45 ° C and 200 ° C, so it has been widely used in various electroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J183/04C09J183/05C09J11/04C09J11/06
CPCC08K2003/2227C08K2003/265C08K2003/282C08K2201/011C08K2201/014C08L2201/02C08L2205/025C08L2205/035C09J11/04C09J11/06C09J183/04C08L83/04C08K13/02C08K3/26C08K3/22C08K3/28C08K3/36C08K3/34
Inventor 郝开强郑苏秦俞波陶小乐何永富
Owner HANGZHOU ZHIJIANG SILICONE CHEM
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