Patent · US Active

Method for the production of a finely crystalline boehmite and application of said boehmite as flame retardant in plastics

US8119096B2 · kind B2 · utility

0Cited by

9References

15Claims

0Family size

Assignee

NABALTEC AG · DE

Inventors

Alfred Reimer · Bergneustadt, DE
Reiner Sauerwein · Fulda, DE
Manfred Sorgalla · Schwandorf, DE
Ludwig Edenharter · Burglengenfeld, DE

Key dates

Filing date	Mar 14, 2007
Grant date	Feb 21, 2012
Priority date	—
Expiry date	Dec 25, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01P2006/14
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Method for the production of a finely crystalline boehmite and application of said boehmite as flame retardant in plastics. The method involves mixing aluminum monohydrate with a boehmite crystal structure in water to form an aqueous dispersion of said aluminum monohydrate in said water, and then grinding the dispersion while maintaining the dispersion in a pH range of 2 to 4 and forming boehmite seed crystals. The boehmite seed crystals can then optionally be mixed with a hydrate and a basic aqueous solution to form a dispersion which may be heated to convert at least a substantial portion of the aluminum monohydrate to boehmite.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.