Ultrafine Natural Ground Brucite
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United States of America Patent
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Issued Date -
Nov 29, 2007
app pub date -
Feb 4, 2005
filing date -
Feb 6, 2004
priority date (Note) -
Abandoned
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Abstract
The invention provides particulate natural magnesium hydroxide (e.g. brucite) having a d.sub.90 less than or equal to 6.2 .mu.m, as measured by CILAS, and a particulate filler material for use in a polymeric composition, particularly but not exclusively a flame-retardant polymeric composition, the filler material comprising the particulate natural magnesium hydroxide and optionally one or more other particulate inorganic material (e.g. alumina trihydrate).
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