Process for producing perlite microspheres

Details Process for producing perlite microspheres Process for producing perlite microspheres

1974-09-20

1976-06-08

Garvin, Patrick P.

Compositions: coating or plastic

Materials or ingredients

106DIG2, 106 40R, 252378P, C09C 128, C04B 3122

Patent

active

039619788

ABSTRACT:
Perlite reduced to a particle size of less than 200 mesh in a binder of aqueous sodium ligno-sulfonate is expanded while suspended in a gaseous medium in a fluidized state at temperatures ranging from 1800.degree. to 2200.degree.F. for a period of 30 to 60 seconds. The resultant microspheres have excellent physical properties and are suited to use as fillers for resins.

REFERENCES:
patent: 2977240 (1961-03-01), Houston
patent: 3458332 (1969-07-01), Alford et al.
patent: 3752685 (1973-08-01), Honda et al.
patent: 3810773 (1974-05-01), Shannon

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