Process for producing modified alumina hydrate crystals
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United States of America Patent
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Jul 20, 1982
Grant Date -
N/A
app pub date -
Nov 30, 1979
filing date -
Dec 2, 1978
priority date (Note) -
Expired
status (Latency Note)
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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.
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