Surface Modification Method of Spherical Alumina 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 problem of long production process and production cycle, inactivation of phosphorus-containing curing agent, and unsuitable for batch production. Production and other problems, to achieve the effect of good molding, improved compatibility, good moisture resistance

Active Publication Date: 2021-12-10
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 Alumina for High Strength Epoxy Molding Compound
  • Surface Modification Method of Spherical Alumina for High Strength Epoxy Molding Compound
  • Surface Modification Method of Spherical Alumina for High Strength Epoxy Molding Compound

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Hydroxylation of spherical alumina: put 1 kg of spherical alumina of 9-11 μm into a stirrer, and add a mixed solution of 100 g of hydrogen peroxide and 100 g of pure water, stir for 4 hours at a temperature of 60 ° C, and filter and crush Dry to obtain 1 kg of aluminum oxide hydroxide.

[0029] (2) Surface modification: put 1 kg of hydroxylated alumina into the powder surface modification machine, and spray a mixture of 7 g of KBM573, 0.1 g of acetic acid, 14 g of pure water, and 7 g of isopropanol. Mix down for 1 hour.

[0030] (3) Heat treatment: 1 kg of surface-modified alumina was put into a muffle furnace, and heat-treated at 300° C. for 6 hours to obtain 1 kg of surface-heat-treated alumina.

Embodiment 2

[0032] (1) Hydroxylation of spherical alumina: Put 1 kg of spherical alumina of 9-11 μm into a stirred tank, add a mixed solution of 100 g of hydrogen peroxide and 100 g of pure water, stir for 4 hours at 60°C, and filter with suction Dry and crush to obtain 1 kg of aluminum oxide hydroxide.

[0033] (1) Surface modification: Put 1 kg of hydroxylated aluminum oxide in step (2) into the stirred tank, and spray the mixed solution of A18717 g, 0.1 g of acetic acid, 14 g of pure water, and 7 g of isopropanol, and mix at 110 ° C for 1 Hour.

[0034] (1) Heat treatment: 1 kg of surface-modified alumina was put into a muffle furnace, and heat-treated in a heat flow field of 300° C. for 6 hours to obtain 1 kg of surface heat-treated alumina.

Embodiment 3

[0036] (1) Hydroxylation of spherical alumina: put 1 kg of spherical alumina of 9-11 μm into a stirred tank, add a mixed solution of 100 g of hydrogen peroxide and 100 g of pure water, stir for 4 hours at 80 ° C, and filter with suction Dry and crush to obtain 1 kg of aluminum oxide hydroxide.

[0037] (2) Surface modification: put step (2) 1 kg of hydroxylated aluminum oxide into a stirred tank, and add 7 g of bisamino A178, 0.1 g of acetic acid, 14 g of pure water, and a mixed solution of 7 g of isopropanol in a spray mode. Mix at 110°C for 1 hour.

[0038] (3) Heat treatment: 1 kg of surface-modified alumina was put into a muffle furnace, and heat-treated in a heat flow field of 300° C. for 6 hours to obtain 1 kg of surface heat-treated alumina.

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Abstract

The invention discloses a surface modification method of spherical alumina for high-strength epoxy molding compound. In the method, the spherical alumina is first subjected to hydroxylation treatment, then the hydroxylated alumina is subjected to surface treatment with a silane coupling agent, and finally the surface-modified alumina is subjected to heat treatment at a temperature of 250-300° C. , to obtain spherical alumina for epoxy molding compounds. The spherical alumina prepared by the invention has excellent compatibility with epoxy resins, and meanwhile has high Shore hardness, bending strength and good moisture resistance.

Description

technical field [0001] The invention belongs to the technical field of preparation of thermally conductive fillers, and relates to a method for surface modification of spherical alumina used in high-strength epoxy molding compounds. Background technique [0002] With the further development of 5G, electronic products such as smartphones, tablet computers, and wearable devices tend to be more miniaturized, high-frequency, high-speed, and highly integrated, which puts forward higher requirements for the performance of epoxy molding compounds. The filler in the epoxy molding compound has a great influence on the performance of the epoxy molding compound. At present, the requirements for fillers mainly include: 1) good insulation and high reliability; 2) low thermal expansion coefficient and high thermal conductivity; 3) good moisture resistance and less prone to microcracks. [0003] Conventionally used insulating and thermally conductive fillers include alumina, aluminum nitr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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