Preparation method of high heat-resistant boehmite

A boehmite, high heat-resistant technology, applied in the direction of alumina/aluminum hydroxide, etc., can solve the problems of lower qualification rate of electronic substrates, foaming of synthetic resin, uneven surface, etc., to achieve widened applications, high oil absorption rate, High whiteness effect

Inactive Publication Date: 2010-09-15
上海百图高新材料科技有限公司
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curing of thermoplastic resins is mostly within the dehydration temperature range of aluminum hydroxide, which leads to foaming in the finished synthetic resin, uneven surface, and lower yield
For example, when thermosetting resin is used for electronic substrates, the temperature of soldering and lead-free soldering reaches 230-260°C, so dehydration of aluminum hydroxide may reduce the yield of electronic substrates

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of high heat-resistant boehmite
  • Preparation method of high heat-resistant boehmite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The preparation method of high heat-resistant boehmite comprises the following steps:

[0020] (1) Put the aluminum hydroxide of 1 μm under the conditions of temperature ≥ 350°C and pressure ≥ 10kPa until the gibbsite crystal structure of aluminum hydroxide is converted into boehmite, and the dehydration amount is greater than 16% ;

[0021] (2) Grind the boehmite to a particle size of 50-400 nanometers, then evenly disperse the boehmite particles into the water, use a wet high-speed stirring method to disperse the boehmite, and perform nano-SiO on the surface 2 Coating treatment, while controlling the pH value of the slurry within the range of 6.8-7.2;

[0022] (3) The product boehmite is obtained by drying after impurity removal and purification.

[0023] In this embodiment, 1 μm aluminum hydroxide is used as raw material, and the 1% dehydration temperature of the aluminum hydroxide raw material is 235° C., and the 1% dehydration temperature of the boehmite product ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of high heat-resistant boehmite. The method comprises the following steps: firstly converting aluminium hydroxide with the crystalline structure of gibbsite to boehmite under the condition that the temperature is not less than 350 DEG C and the pressure is not less than 10kPa; secondly grinding boehmite to 50-400nm (particle size), then dispersing boehmite particles evenly in water, adopting wet high-speed mixing method to disperse boehmite, performing surface nano-SiO2 coating; and finally removing impurities, purifying, and drying to obtain the boehmite product. Boehmite which is prepared by the dry heat method adopted by the invention has low content of impurities, the boehmite conversion rate is high, and the grain size is controllable. In addition, the invention uses the inorganic modifier, thus significantly reducing oil adsorption of material, increasing liquidity and broadening the application of boehmite in the field of electronic materials.

Description

technical field [0001] The invention relates to a preparation method of a new material, especially a preparation method of high heat-resistant boehmite. Background technique [0002] Boehmite is boehmite, also known as boehmite, with a structural formula of AlO(OH) and a molecular formula of Al 2 o 3 ·H 2 O, Boehmite is soluble in acid and alkali. This mineral is formed in acidic medium, mainly in sedimentary bauxite, and is characterized by symbiosis with siderite. It can be replaced by diaspore, gibbsite, kaolinite, etc., dehydrated into diaspore and α-corundum, and hydrated into gibbsite. The flammability of synthetic resin meets the requirements of use due to the addition of flame retardants. Among many flame retardants, aluminum hydroxide (Al(OH) 3 ) is the most widely used due to rich structural water, good flame retardant effect, excellent acid and alkali resistance, and low cost. However, the dehydration of aluminum hydroxide starts at 200°C and is completely d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02
Inventor 蒋学鑫程松波
Owner 上海百图高新材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap