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US 8,017,663 B2Granted
Modified asphaltic foam materials
AssigneeDevpat, LLC
InventorsGeorge F. Thagard, III, Nicolae Achim
Life of this patent
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Abstract
An asphaltic isocyanurate foam useful in roofing applications. Asphalt is liquified and mixed with a mixture of polyisocyanate. In a separate mixture, other chemicals, such as polyols, surfactant, catalyst, and blowing agent are combined. The mixtures are combined and reacted to form an asphaltic polyurethane foam.
Claims30
A method for producing asphaltic foam comprising the steps of:
- providing an asphalt;
- liquefying said asphalt;
- adding to said asphalt one or more isocyanates, thereby forming a first intermediate mixture;
- bringing the temperature of said first intermediate mixture to between about 120° F. and 170° F.;
- forming a second intermediate mixture comprising one or more polyols, a blowing agent, and a surfactant, wherein the second intermediate mixture is segregated from the first intermediate mixture;
- forcing said first intermediate mixture through a first impingement dispensing head;
- forcing said second intermediate mixture through a second impingement dispensing head;
- and
- mixing said first intermediate mixture forced through said first impingement dispensing head with said second intermediate mixture forced through said second impingement dispensing head, thereby forming a final reaction mixture, wherein said first intermediate mixture and said second intermediate mixture react and expand in a controllable manner such that the final reaction mixture does not expand beyond a form desired in a final molded asphaltic foam or cure before taking on said form to produce said asphaltic foam.
6 more elements
Dependencies are inferred from the claim text.