Roof covering having improved tear strength
AssigneeOwens Corning Intellectual Capital, LLC
InventorsJerry H C Lee, Gregory S. Helwig, David R. Jones, IV, David C. Trumbore
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Abstract
A roof covering includes a roofing mat formed from fibers of a fiber material. The fibers are coated with a sizing. The roof covering also includes a coating material that coats the mat. The coating material is based on an organic material. The sizing includes a sulfur-containing material that bonds to the fiber material. The sulfur-containing material has sulfur groups that form cross-links with the organic material. In another embodiment, the coating material contains sulfur added to the organic material. The sizing includes a bonding material that bonds to the fiber material and that bonds to the sulfur. The sulfur forms cross-links with the organic material.
Claims21
A roof covering comprising:
- a roofing mat formed from a fiber material having fibers with properties suitable for forming the roofing mat, the fibers being coated with a sizing containing a film-forming polymer and a bonding material;
- and
- an asphalt-based coating material that coats the mat and binds to the fibers, the binding of the coating material to the fibers of the mat being enhanced by crosslinking via (a) the bonding material that is coated onto and bonds to fibers of the mat and (b) sulfur groups bound to the bonding material and forming cross-links with the asphalt of the coating material;
- wherein the tear strength of the roof covering is increased as measured by ASTM D 1922 compared to the same roof covering without the sulfur groups bound to the bonding material and cross-linked with the asphalt of the coating material.
Dependencies are inferred from the claim text.