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US 7,678,467 B2Granted
Asphalt shingle coating with improved tear strength
AssigneeICL Performance Products LP
InventorsMichael Falkiewicz, Rene Maldonado
Life of this patent
Estimating the term…
Abstract
The present invention is directed to an air-blown roofing asphalt modified with polyphosphoric acid and roofing products made with the polyphosphoric acid-modified, air-blown asphalt.
Claims19
An asphalt shingle comprising:
- an organic felt or fiberglass mat;
- a first layer of a chemically-modified, air-blown asphalt and a second layer of a chemically-modified, air-blown asphalt, wherein the mat is coated on its top surface by one of the layers of chemically-modified, air-blown asphalt and the mat is coated on its bottom surface by the other layer of chemically-modified, air-blown asphalt;
- and a surfacing material embedded into the surface, that is opposed to the mat, of at least one of the chemically-modified, air-blown asphalt layers;
- wherein said chemically-modified, air-blown asphalt is formed by a process for modifying an asphalt that comprises air blowing the asphalt and mixing polyphosphoric acid with the asphalt before the air blowing, during the air blowing, or a combination thereof to form the chemically-modified, air-blown asphalt.
1 more element
In a process for manufacturing an asphalt shingle comprising:
- an organic felt or fiberglass mat;
- a first layer of a chemically-modified, air-blown asphalt and a second layer of a chemically-modified, air-blown asphalt, wherein the mat is coated on its top surface by one of the layers of chemically-modified, air-blown asphalt and the mat is coated on its bottom surface by the other layer of chemically-modified, air-blown asphalt;
- and a surfacing material embedded into the surface, that is opposed to the mat, of at least one of the chemically-modified, air-blown asphalt layers;
- the improvement comprises using a chemically-modified, air-blown asphalt that is formed by a process for modifying an asphalt that comprises air blowing the asphalt and mixing polyphosphoric acid with the asphalt before the air blowing, during the air blowing, or a combination thereof to form the chemically-modified, air-blown asphalt.
1 more element
A method of increasing the tear strength of an asphalt shingle that comprises:
- an organic felt or fiberglass mat;
- a first layer of a chemically-modified, air-blown asphalt and a second layer of a chemically-modified, air-blown asphalt, wherein the mat is coated on its top surface by one of the layers of chemically-modified, air-blown asphalt and the mat is coated on its bottom surface by the other layer of chemically-modified, air-blown asphalt;
- and a surfacing material embedded into the surface, that is opposed to the mat, of at least one of the chemically-modified, air-blown asphalt layers;
- the method comprising manufacturing the asphalt shingle so that the asphalt of said asphalt shingle is a chemically-modified, air-blown asphalt that is formed by a process for modifying an asphalt that comprises air blowing the asphalt and mixing polyphosphoric acid with the asphalt before the air blowing, during the air blowing, or a combination thereof to form the chemically-modified, air-blown asphalt, wherein the increase in the tear strength is determined by comparing the tear strength of said asphalt shingle to a standard asphalt shingle that is identical to said asphalt shingle except for the fact that a corresponding portion of the asphalt of said standard asphalt shingle is an otherwise identical air-blown asphalt that was not mixed with polyphosphoric acid before or during the air blowing or a combination thereof.
1 more element
Dependencies are inferred from the claim text.