Pouring sealant for electronic components of automobile control system and preparation method thereof

A technology for electronic components and automobile control, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problems of control system temperature rise, poor current constant effect, control system damage, etc., and achieve good bonding performance and corrosion resistance Ideal performance, process requirements and equipment are not harsh

Active Publication Date: 2012-06-27
江苏明昊新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the car is working, the power used by its control system is the DC power provided by the car's own battery.

Method used

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  • Pouring sealant for electronic components of automobile control system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A) To prepare component A, 120 parts by weight of α-ω-dihydroxy polydimethylsiloxane, 35 parts of methyl vinyl silicone oil, the average particle size is 48-52nm, and the purity is >99.9 %, the specific surface area is not 43.2-43.4m 2 / g and bulk density of 0.155-0.165g / cm 3 6 parts of thermally conductive fillers, 75 parts of active magnesium hydroxide and active aluminum hydroxide mixed in a weight ratio of 1:1, and 35 parts of heavy calcium carbonate with an average particle diameter of 20nm were added to the vacuum kneader, and the vacuum degree of the kneader was at - 0.09MPa, kneading temperature 130°C, and kneading for 120 minutes to obtain component A, in which: thermally conductive filler is a mixture of nano-silicon nitride, nano-magnesium nitride, nano-silicon carbide, nano-aluminum nitride, nano-boron nitride and aluminum oxide , and the parts by weight of these raw materials constituting the thermally conductive filler are the same;

[0034] B) To prepar...

Embodiment 2

[0037] A) To prepare component A, 115 parts of α-ω-dihydroxypolydimethylsiloxane, 30 parts of dimethyl silicone oil, 5 parts of thermally conductive filler, 60 parts of activated aluminum hydroxide, and 32 parts of heavy calcium carbonate Add one part to a vacuum kneader, the vacuum degree of the kneader is -0.07MPa, the kneading temperature is 120°C, and after kneading for 110min, component A is obtained;

[0038] B) To prepare component B, 88 parts of methyl vinyl silicone oil, 19 parts of methyl triisobutylketoximosilane, 5.5 parts of hexamethyldisiloxane, 2.5 parts of dibutyltin dioctoate, the color Put 2.8 parts of the black colored slurry into a double planetary high-speed mixer, blend at a rotation speed of 360n / min and a revolution speed of 38n / min for 45min to obtain component B.

[0039] When in use, components A and B are mixed and used at a weight ratio of A:B=6.5:1. The content not involved in this embodiment is the same as the description of Embodiment 1.

Embodiment 3

[0041] A) To prepare component A, 110 parts of α-ω-dihydroxy polydimethylsiloxane, 25 parts of methyl vinyl silicone oil, 5.5 parts of thermal conductive filler, active magnesium hydroxide and active aluminum hydroxide by 2 : 60 parts after 1 mixing, 33 parts of heavy calcium carbonate were added to the vacuum kneader, the vacuum of the kneader was at -0.08MPa, the kneading temperature was 110°C, and after kneading for 100min, component A was obtained;

[0042]B) To prepare component B, 85 parts of methyl vinyl silicone oil, 18 parts of vinyl triisobutylketoximosilane, and 6 parts of γ-[2,3-glycidoxy]propyltrimethoxysilane , 2 parts of dibutyl tin diacetate, 2.6 parts of gray colored slurry were put into a double planetary high-speed mixer, and after blending for 40 minutes at a rotation speed of 350n / min and a revolution speed of 36n / min, component B was obtained;

[0043] In actual compounding, components A and B are mixed according to the weight ratio of A:B=7:1. The conte...

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Abstract

The invention which relates to a pouring sealant for electronic components of an automobile control system and a preparation method thereof belongs to the technical field of high molecular materials. The pouring sealant comprises a component A and a component B, wherein the component A comprises, by weight, 90-120 parts of alpha-omega-dihydroxypolydimethylsiloxane, 20-35 parts of silicone oil, 4-6 parts of a heat conduction filler, 45-75 parts of a flame retardation filler and 30-35 parts of heavy calcium carbonate; and the component B comprises, by weight, 80-90 parts of the silicone oil, 17-20 parts of a crosslinking agent, 5-6 parts of a coupling agent, 1.5-3 parts of a catalyst and 2-3 parts of a colored slurry. The pouring sealant has the advantages: above formula is reasonable, so the flame retardation of the pouring sealant can be effective increased, the heat conduction effect can be greatly improved, and heat radiated by the components in an integrated circuit board is timelyand effectively conducted to the outside; the electrical property is excellent; the adhesion is good; and the corrosion resistance is ideal. A recommended preparation method of the pouring sealant has the advantages of concise process, and low requirements on the process and equipment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a potting glue for electronic components of an automobile control system, and also relates to a preparation method thereof. Background technique [0002] With the development of the automobile industry at an astonishing speed, the degree of refinement of the automobile control system is getting higher and higher, such as integrated circuits, modular control devices, etc. It is composed of many precision electrical appliances, usually in the form of welding and wire connection, and its requirements on the working environment are also quite strict, especially in terms of shockproof, dustproof, humidity and temperature requirements. When the car is working, the power supply used by its control system is the DC power provided by the car's own battery. Its current constant effect is poor, and large or small currents can easily cause the control system to heat up,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/07C09J183/04C09J11/04C09K3/10
Inventor 韩仁明王益昌费志刚
Owner 江苏明昊新材料科技股份有限公司
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