Process for producing modified alumina hydrate crystals

Details Process for producing modified alumina hydrate crystals Process for producing modified alumina hydrate crystals

1979-11-30

1982-07-20

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

524430, C01F 702

Patent

active

043405797

ABSTRACT:
The present invention relates to a modified form of alumina hydrate filler, thermosetting and thermoplastic compositions having improved workability and mechanical properties containing such filler and methods of manufacturing such modified alumina hydrate filler. More specifically, the invention provides for the admixture of modified alumina hydrate crystals with a resinous composition in which the individual alumina hydrate crystal edges are substantially rounded, have a mean crystal size of less than about 35 microns and less than about 0.1% by volume of alumina hydrate crystals have a diameter of less than 2 microns. The resulting compositions have improved viscosity properties and exhibit good bending strength and flame retardant characteristics.

REFERENCES:
patent: 1314710 (1919-09-01), Sherwin
patent: 1943786 (1934-01-01), Cowles
patent: 1953201 (1934-04-01), Toslerud
patent: 3265466 (1966-08-01), Mallard
patent: 3466142 (1969-09-01), Hambly
patent: 3619309 (1971-11-01), Faktor et al.
patent: 3653937 (1972-04-01), Koenig et al.
patent: 3832442 (1974-08-01), Emerson
patent: 4203962 (1980-05-01), Lippman

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