Cement reinforced gypsum foam with mineral wool
AssigneeGeneral Electric Company
InventorsRobert F. Mulvey, Charles E. Crepeau
Life of this patent
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Abstract
An improved material particularly suited for the thermal insulation of building structures such as residential housing. The material comprises an inorganic, low-density cellular thermally insulating foam comprising a gypsum matrix having minute cavities homogeneously distributed therein. The material has a dry density of less than about 6 pounds per cubic foot and a thermal coefficient of less than about 0.37. The gypsum matrix includes therein approximately 1 to 15% by weight of cement, approximately 0.5 to 7% by weight of mineral wool and at least approximately 0.25% by weight of chopped glass.
Claims6
A thermally insulating composite assembly, comprising generally at least one structural surface element and a low-density cellular gypsum material positioned adjacent to said surface element, said cellular gypsum material comprising a gypsum matrix having minute cavities homogeneously distributed therein, said gypsum material having a dry density of less than about 6 pounds per cubic foot and a thermal coefficient of less than about 0.37, said gypsum matrix including therein:
- (a) approximately 1 to 15 percent by weight of a cement dispersed homogeneously throughout said gypsum matrix;
- (b) approximately 0.5 to 7 percent by weight of a mineral wool dispersed homogeneously throughout said gypsum matrix;
- and
- (c) at least approximately 0.25 percent by weight of a chopped glass distributed homogeneously throughout said gypsum matrix.
A low-density cellular thermally insulating gypsum material comprising a gypsum matrix having minute cavities homogeneously distributed therein, said gypsum material having a dry density of less than about 6 pounds per cubic foot, and a thermal coefficient of less than about 0.37, said gypsum matrix including therein:
- (a) approximately 1 to 15 percent by weight of a cement dispersed homogeneously throughout said gypsum matrix;
- (b) approximately 0.5 to 7 percent by weight of a mineral wool dispersed homogeneously throughout said gypsum matrix;
- and
- (c) at least approximately 0.25 percent by weight of a chopped glass distributed homogeneously throughout said gypsum matrix.
Dependencies are inferred from the claim text.