Light colored and low density mineral filler from magnesium sili

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

1983-10-18

1984-10-30

Cockeram, Herbert S.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106306, 106309, C09C 136

Patent

active

044798288

ABSTRACT:
A light colored and asbestos free granular material of the invention is suitable for use as lightweight fillers in plastics and is derived from asbestos tailings wherein the MgO:SiO.sub.2 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 density of from 17 to 25 lb/ft.sup.3 and having a degree of whiteness within the range of from 50 to 60 when measured by the ASTM Procedure No. E-97-77.

REFERENCES:
patent: 2212446 (1940-08-01), MacIntire
patent: 2283758 (1942-05-01), Pike
patent: 3862294 (1975-01-01), Engelhart
patent: 3966884 (1976-06-01), Jacob
patent: 3967974 (1976-07-01), Ohnemuller
patent: 4277449 (1981-07-01), Lalancette

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