ACID-RESISTANT MAGNESIUM HYDROXIDE PARTICLE FLAME RETARDANT AND FLAME-RETARDANT RESIN COMPOSITION

Japanese Patent JP3499716

B2

PROBLEM TO BE SOLVED: To obtain a flame retardant which, when added to a resin, exhibits excellent acid resistance and dispersibility and giving a composition inhibited from foaming during processing by forming a specified amount of aluminum hydroxide in the form of a film on the surfaces of magnesium hydroxide particles.
SOLUTION: A film of aluminum hydroxide in an amount corresponding to 0.05-5 wt.% in terms of Al2O3 is formed on the surfaces of magnesium hydroxide particles. The magnesium hydroxide may be anything that has a BET specific surface area of 20 m2/g or below and a mean particle diameter of 5 μm or below and is used as a flame retardant. The magnesium hydroxide coated with aluminum hydroxide can be used as such. However, when it is used after being surface-treated with a higher fatty acid, a phosphoric ester or an alkali metal salt thereof, it can show improved acid resistance, improved compatibility with resins, improved dispersibility and can give a composition having improved moldability and being capable of giving moldings improved in physical properties.

Tomoko Hasitani
Tsutomu Nosu
Makoto Yoshii

JP14939697A

February 23, 2004

June 06, 1997

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Kyowa Chemical Industry Co., Ltd.

C09K21/02; C08K9/00; C08K9/02; C08L101/00; C09C1/02; C09C3/06; C09C3/08; (IPC1-7): C09K21/02; C08K9/02; C08L101/00

JP52128899A
JP2293317A
JP6440541A
JP6440540A
JP63265960A
JP1104687A
JP6221704A
JP6445716A

Masataka Oshima

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