Light colored and low density mineral filler from magnesium...

Details Light colored and low density mineral filler from magnesium... Light colored and low density mineral filler from magnesium...

C - Chemistry, Metallurgy

09

C

6/212

C09C 1/28 (2006.01) C09C 3/06 (2006.01)

Patent

CA 1201557

A B S T R A C T A light coloured and asbestos free granular material of the invention is suitable for use as light- weight fillers in plastics and is derived from asbestos tailings wherein the MgO:SiO2 ratio is at least 1.0, said granular material comprising particles consisting of a mixture of enstatite, forsterite and silica having a particle size of from -400 to -10 mesh, said particles being coated with a silicate bonded layer of calcium oxide or magnesium oxide or mixtures thereof, said particles being further characterized by having a den- sity of from 17 to 25 psi and having a degree of white- ness within the range of from 50 to 60 when measured by the ASTM Procedure No. E-97-77.

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