Roof coverings having improved tear strength
AssigneeOwens Corning Intellectual Capital, LLC
InventorsJerry H C Lee, Gregory S. Helwig, David R. Jones, IV, David C. Trumbore
Life of this patent
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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.
Claims36
A roof covering comprising:
- a roofing mat formed from fibers of a fiber material, the fibers having properties suitable for forming the roofing mat, the fibers coated with a sizing;
- and
- an asphalt-based coating material that coats the mat;
- the sizing including a film forming polymer, and a sulfur-containing material that bonds to the fiber material, the sulfur-containing material having therein sulfur groups that form cross-links with the asphalt;
- wherein the roof covering is a roofing shingle and the tear strength of the roofing shingle is increased by at least about 5% as measured by ASTM D 1922 compared to the same roof covering without the sulfur-containing material in the sizing.
A roof covering comprising:
- a roofing mat formed from fibers of a fiber material, the fibers being coated with a sizing;
- and
- a coating material that coats the mat, the coating material consisting essentially of asphalt, filler, and elemental sulfur, the elemental sulfur being added to the coating material in an amount from about 0.1% to about 2.0% by weight of the coating material,
- the sizing including a film forming polymer, a coupling agent, a lubricant, and a bonding material that bonds both to the fiber material and to the elemental sulfur;
- wherein the elemental sulfur forms cross-links with the asphalt;
- and
- wherein the roof covering is a roofing shingle and the tear strength of the roofing shingle is increased by at least about 5% as measured by ASTM D 1922 compared to the same roof covering without the bonding material in the sizing and the sulfur added to the coating material.
A roof covering comprising:
- a roofing mat formed from fibers selected from silica-based fibers, metal fibers, and combinations thereof coated with a sizing;
- and
- an asphalt-based coating material that coats the mat;
- wherein the sizing includes a film forming polymer and a sulfur-containing material that has functional groups that bond to the fiber material, the sulfur-containing material having therein sulfur groups that form cross-links with the asphalt;
- and
- wherein the roof covering is a roofing shingle and the tear strength of the roofing shingle is increased by at least about 5% as measured by ASTM D 1922 compared to the same roof covering without the sulfur-containing material in the sizing.
A roof covering comprising:
- a roofing mat formed from fibers of a fiber material, the fibers being coated with a sizing;
- and
- a coating material that coats the mat, the coating material consisting essentially of asphalt, filler, and elemental sulfur, the elemental sulfur being added to the coating material in an amount from about 0.1% to about 2.0% by weight of the coating material,
- wherein the sizing includes a film forming polymer and a bonding material that bonds both to the fiber material and to the elemental sulfur;
- wherein the elemental sulfur forms cross-links with the asphalt;
- and
- wherein said elemental sulfur and said bonding material cooperate to enhance interfacial bonding between said fiber material and said coating material.
Dependencies are inferred from the claim text.