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Surface modification method of spherical aluminum oxide for high-strength epoxy molding compound

A technology of spherical alumina and epoxy molding compound, which is applied in the field of surface modification of spherical alumina for high-strength epoxy molding compound, can solve the problems of high production cost, inactivation of phosphorus-containing curing agent, poor moisture resistance, etc., and achieve The effect of high Shore hardness, high bending strength, and good moisture resistance

Active Publication Date: 2021-03-12
JIANGSU NOVORAY NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent application CN106660817A discloses a spherical alumina powder and a resin composition using the spherical alumina powder. The filler is modified by a dry modification method of a ball mill or a mixer and a wet modification method of mixing and stirring an organic solvent. , although the above method improves the thermal conductivity, fluidity and wettability of the filler, there are still problems such as inhibiting the curing effect of the phosphorus-containing curing accelerator, deactivating the phosphorus-containing curing agent, and poor moisture resistance.
And the production flow and production cycle of this method are longer, and production cost is higher, is not suitable for batch production

Method used

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  • Surface modification method of spherical aluminum oxide for high-strength epoxy molding compound
  • Surface modification method of spherical aluminum oxide for high-strength epoxy molding compound
  • Surface modification method of spherical aluminum oxide for high-strength epoxy molding compound

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Spherical alumina hydroxylation: 3 kg of spherical alumina 1kg of 9-11 μm, 100 g of hydrogen peroxide, a mixed solution of pure water 100g, at a temperature of 60 ° C, stirred for 4 hours, filtrate crushing Drying to give 1 kg of hydroxylated alumina.

[0029] (2) Surface modification: 3 kg of hydroxylated alumina is introduced to the powder surface modification machine, and the spray is added to KBM 573 7G, a acetic acid 0.1 g, pure water 14g, a mixture of isopropyl alcohol 7g, a thermal flow field at 110 ° C Mix for 1 hour.

[0030] (3) Heat treatment: 1 kg of alumina after surface modification is placed in a muffle, and heat treatment at 300 ° C for 6 hours to give alumina for 1 kg of surface heat treatment.

Embodiment 2

[0032] (1) Spherical alumina hydroxylation: 9-11 μm of spherical alumina 1 kg was put into a stirrer, and 100 g of hydrogen peroxide, a mixed solution of pure water 100 g, under 60 ° C, stirred for 4 hours, filtration Dry crushing to give 1 kg of hydroxylated alumina.

[0033] (1) Surface modification: Putting step (2) hydroxylated alumina 1 kg into a stirred tank, and sprayed into A18717 g, acetic acid 0.1 g, pure water 14g, a mixture of isopropyl alcohol 7g, mixed under 110 ° C for 1 hour.

[0034] (1) Heat treatment: 1 kg of alumina after surface modification is placed in a muffle furnace, and heat treatment at 300 ° C for 6 hours to give 1 kg of surface heat treatment alumina.

Embodiment 3

[0036] (1) Spherical alumina hydroxylation: 9-11 μm of spherical alumina 1 kg is administered in a stirrer, and a mixed solution of hydrogen peroxide 100g, pure water 100 g, at 80 ° C, stirred for 4 hours, filtration Dry crushing to give 1 kg of hydroxylated alumina.

[0037] (2) Surface modification: 3 kg of hydroxylated alumina in the stirrer is added to the stirred tank, and a double amino group A178 7G, a acetic acid is 0.1 g, pure water 14g, and a mixture of 7 g of isopropyl alcohol is added in a spray. It was mixed under 110 ° C for 1 hour.

[0038] (3) Heat treatment: 1 kg of alumina after surface modification is placed in a muffle furnace, and heat treatment at 300 ° C for 6 hours to obtain 1 kg of surface heat treatment alumina.

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Abstract

The invention discloses a surface modification method of spherical aluminum oxide for a high-strength epoxy molding compound. The method comprises the following steps: firstly, carrying out hydroxylation treatment on spherical aluminum oxide, then carrying out surface treatment on the hydroxylated aluminum oxide by using a silane coupling agent, and finally carrying out heat treatment on the surface-modified aluminum oxide at the temperature of 250-300 DEG C to obtain the spherical aluminum oxide for the epoxy molding compound. The spherical alumina prepared in the invention has excellent compatibility with epoxy resin, high shore hardness, high bending strength and good moisture resistance.

Description

Technical field [0001] The present invention belongs to the preparation of thermally conductive fillers, and it is directed to a surface modification method of spherical alumina for high intensity epoxy mold plastics. Background technique [0002] With the further in-depth of 5G, electronic products such as smartphones, tablets, wearable devices are more treated, high frequency, high speed, high integration, and provide higher requirements for the performance of epoxy mold plastics. The fillers in epoxy mold plastics have a greater impact on the performance of epoxy mold plastics. At present, the refill requirements mainly include: 1) Good insulation, high reliability; 2) low thermal expansion coefficient, high thermal conductivity; 3) Good moisture resistance, not easy to produce micro-cracking phenomenon. [0003] Conventional insulating conductive filters include alumina, aluminum nitride, boron nitride, and the like. Since aluminum nitride and boron nitride are expensive, the...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K9/02C08K9/00C08K7/18C08K3/22C08L63/00
CPCC08K9/06C08K9/02C08K9/00C08K7/18C08K3/22C08K2003/2227C08L63/00
Inventor 李晓冬曹家凯刘亚飞孙小耀王聿东顾东进
Owner JIANGSU NOVORAY NEW MATERIAL CO LTD
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