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US 4,539,254 AGranted
Reinforcing composite for roofing membranes and process for making such composites
AssigneeBay Mills Limited
InventorsTerry J. O'Connor, Ian G. Cooper
Life of this patent
Estimating the term…
Abstract
A reinforcing composite for bituminous roofing membranes is made by laminating fiberglass and polyester mats and scrims coated with selected adhesives.
Claims9
A composite for reinforcing roofing membranes comprising three or more layers bonded together with a thermosetting resin one of which layers is made of fiberglass, one of which is made of polyester, and the third of which is made of either polyester or fiberglass;
- further, at least one of which is in the form of a scrim, one of which is in the form of a mat, and a third of which is in the form of a mat or a scrim;
- wherein the composite is flexible, capable of being impregnated by a bitumenous material, and has sufficient strength to be useful in reinforcing membrances.
A process for making a composite to use in reinforcing roofing membranes comprising the steps of;
- selecting at least three materials, one of which is fiberglass, one of which is polyester, and the third of which is fiberglass or polyester;
- one of which is in the form of a scrim, one of which is the form of a mat, and the third of which is in the form of either a mat or a scrim;
- applying to at least one scrim a coating of thermosetting adhesive;
- combining the other selected materials with said scrim before the adhesive has fully set;
- and
- thereafter causing the adhesive to set further, thus binding the materials together into a composite;
- and
- cooling the composite thus created;
- wherein the resulting composite is flexible, capable of being impregnated by bitumenous material, and has sufficient strength to be useful in reinforcing roofing membranes.
6 more elements
Dependencies are inferred from the claim text.