Preparation method of environment-friendly and flame-retardant composite hexagonal boron nitride film

A hexagonal boron nitride and flame retardant composite technology, which is applied in the field of solid hexagonal boron nitride film preparation, can solve the problems of pollution, low flame retardant level, inconvenient manufacturing process, etc., and achieve simple operation process and major innovation value, the effect of excellent heat resistance

CN104387774AActive Publication Date: 2015-03-04庞红桥
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-03-04
Patent Text Reader

Abstract

The invention provides a preparation method of an environment-friendly and flame-retardant composite hexagonal boron nitride film. The preparation method comprises the following steps: selecting and uniformly mixing hexagonal boron nitride particles with different grain sizes, adding a silane coupling agent, obtaining mixed hexagonal boron nitride power, then adding dimethicone, hydroxide composite powder, fumed silica gel and superoxide in the mixed hexagonal boron nitride power in sequence, obtaining a hexagonal boron nitride film semi-finished product, putting the hexagonal boron nitride film finished product into vulcanizing equipment for vacuumizing, pressurizing and shaping, and obtaining an environment-friendly and flame-retardant composite hexagonal boron nitride film finished product. The film prepared by the preparation method integrates high heat conductivity coefficient of hexagonal boron nitride and excellent flame retardancy of the hydroxide composite powder and simultaneously has the functions of environmental friendliness and no electric conduction, and the flame retardant rating is the highest in UL94 standard. The preparation method has the advantages of wide adaptability, simple operation process, major innovation value and practical application prospect.
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Description

technical field

[0001] The invention relates to an environment-friendly flame-retardant composite hexagonal boron nitride film technology, in particular to a method for preparing a solid hexagonal boron nitride film with a thermal conductivity as high as 10W / M-K obtained after silane treatment.

[0002] Background technique

[0003] Entering the 21st century, with the rapid development of electronic information products and technologies, the demand for organic materials with high thermal conductivity, electrical insulation and environmental protection and flame retardancy has surged. Faced with this demand, people have successively developed products such as ceramic sheets and alumina-filled silica gel gaskets, but there are several problems in existing such products.

[0004] Although ceramic sheets have both high thermal conductivity and electrical insulation, but because of their hard texture, deformation and compression ratio are almost zero, the manufacturing process i...

Examples

Embodiment 1

[0030] (1) Select the hexagonal boron nitride powder with a particle size of 20um and the hexagonal boron nitride powder with a particle size of 2.0um, and mix the hexagonal boron nitride powder with two different particle sizes at a mass ratio of 7:3 and stir evenly to obtain hexagonal boron nitride A powder;

[0031] (2) Select the hexagonal boron nitride powder with a particle size of 8um and the hexagonal boron nitride powder with a particle size of 0.8um, and mix the two kinds of hexagonal boron nitride powders with different particle sizes at a mass ratio of 6:4 and stir evenly to obtain hexagonal boron nitride B powder;

[0032] (3) Mix the above-mentioned hexagonal boron nitride A powder and hexagonal boron nitride B powder according to the mass ratio of 1:1 and stir evenly to obtain mixed hexagonal boron nitride powder, take 1000g, add 100g of silane coupling agent, the silane coupling agent is γ-(2,3-glycidoxy)propyltrimethoxysilane, after mixing the two materials, ...

Embodiment 2

[0040] (1) Select the hexagonal boron nitride powder with a particle size of 20um and the hexagonal boron nitride powder with a particle size of 0.8um, and mix the two kinds of hexagonal boron nitride powders with different particle sizes at a mass ratio of 7:3 and stir evenly to obtain hexagonal boron nitride A powder;

[0041] (2) Select the hexagonal boron nitride powder with a particle size of 8um and the hexagonal boron nitride powder with a particle size of 2.0um, and mix the two kinds of hexagonal boron nitride powders with different particle sizes at a mass ratio of 6:4 and stir evenly to obtain hexagonal boron nitride B powder;

[0042] (3) Mix the above-mentioned hexagonal boron nitride A powder and hexagonal boron nitride B powder according to the mass ratio of 1:1 and stir evenly to obtain mixed hexagonal boron nitride powder, take 1000g, add 100g of silane coupling agent, the silane coupling agent is γ-aminopropyltriethoxysilane, the two materials are mixed and t...