Natural particulate carbonate
OwnerDavid Preston, Erik Van Dijnen +3inventors
InventorsDavid Preston, Erik Van Dijnen, Anthony Asbridge, Deborah Thrale, Edward Sare
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Abstract
There is provided a natural alkaline earth metal carbonate having a d50 of about 0.5 μm or less and a moisture pick up of less than about 0.2 wt %, as well as a process for making the particulate carbonate by grinding. The carbonate may be used in polymer compositions.
Claims41
1-40. (canceled)
A natural alkaline earth metal carbonate in particulate form having a d50 of about 0.5 μm or less and a moisture pick up of less than about 0.2 wt %.
A process for making a particulate alkaline earth metal carbonate, comprising grinding a natural source of alkaline earth metal carbonate under conditions to produce a particulate material having a d50 of about 0.5 μm or less and a surface area of less than about 14 m2/g as measured by the BET nitrogen method.
A process for making a particulate alkaline earth metal carbonate, comprising processing a natural source of alkaline earth metal carbonate under conditions including grinding conditions to produce a particulate material having a d50 of about 0.5 μm or less and a moisture pick up of less than about 0.2 wt %.
Dependencies are inferred from the claim text.