Title:
ALUMINUM HYDROXIDE AND METHOD FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO2004050556
Kind Code:
A8
Abstract:
A method for the production of aluminum hydroxide includes the steps of suspending aluminum hydroxide obtained by the Bayer process in a sodium aluminate solution to obtain slurry and elevating a temperature of the slurry from 60°C or less to 90°C or more. The aluminum hydroxide has an average particle diameter D in a range of 1 to 10 gm, a BET specific surface area S of 1.5 m<2>/g or less, a degree of aggregation D/D bet of less than 3, wherein Dbet stands for a particle diameter calculated by spherical approximation from the BET specific surface area S as Dbet = 6(S x p), in which p denotes a specific gravity of the aluminum hydroxide, and a content of particles having diameters exceeding 20 µm that is 0.5% or less by mass. A composition that contains the aluminum hydroxide as filler, can be formed.
Inventors:
ONISHI AKIRA (JP)
Application Number:
PCT/JP2003/015472
Publication Date:
August 05, 2004
Filing Date:
December 03, 2003
Export Citation:
Assignee:
SHOWA DENKO KK (JP)
ONISHI AKIRA (JP)
ONISHI AKIRA (JP)
International Classes:
C01F7/02; C01F7/021; C01F7/023; C08K3/22; C08L101/00; C09C1/40; (IPC1-7): C01F7/02; C09C1/40; C08K3/22
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