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US 5,516,351 AGranted
Foamed glass manufacture
AssigneeRecycled Glass Products, Inc.
InventorsDavid Solomon, Michael Rossetti
Life of this patent
Estimating the term…
Abstract
A foamed glass product and its manufacturer are disclosed. According to the present invention, crushed glass particles and a foaming agent, preferably selected from CaCO.sub.3 and CaSO.sub.4, are provided. The glass particles and foaming agent are mixed and heated to a desired foaming temperature for creating foamed glass. A nonreactive gas having desired insulative properties, preferably selected from SO.sub.2 and CO.sub.2 is provided to sweep air away from the mixture during heating.
Claims14
A method of making foamed glass having a selected R-value consisting essentially of:
- (a) mixing glass particles and a foaming agent;
- said foaming agent being selected from the group consisting of CaSO.sub.4 and CaCO.sub.3 to produce a mixture;
- (b) introducing a nonreactive gas to sweep air away from said mixture;
- (c) heating said mixture to a foaming temperature from about 800.degree. to about 1100.degree. C. to produce said foamed glass;
- and
- (d) maintaining a nonreactive gas atmosphere of said nonreactive gas over said mixture during said heating to sweep air away from said mixture.
3 more elements
Dependencies are inferred from the claim text.