Coated roofing materials
AssigneeOwens Corning Intellectual Capital, LLC
InventorsScott Schweiger, Jonathan Verhoff, Jesse Gadley
Life of this patent
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Abstract
A roofing membrane is provided that includes at least one substrate at least partially impregnated with a first asphalt coating composition and a liquid parting agent emulsion applied to the upper surface of the asphalt-coated substrate. The liquid parting agent emulsion comprises one or more thermoplastic polymers and about 15 wt. % to about 40 wt. % of at least one mineral filler, based on the weight of the total solids in the emulsion. The first asphalt coating composition is free of oxidized asphalt.
Claims20
A roofing membrane comprising:
- an asphalt-coated substrate comprising a substrate at least partially impregnated with a first asphalt coating composition comprising paving-grade asphalt, the substrate having an upper surface and a lower surface, wherein the asphalt coating composition comprises no greater than 20 wt. % oxidized asphalt;
- a liquid parting agent emulsion applied to the upper surface of the asphalt-coated substrate, the liquid parting agent emulsion comprising:
- up to 40 wt. % of a polypropylene emulsion, based on the weight of the total solids in the liquid parting agent emulsion;
- and
- at least 5 wt. % of at least one mineral filler, based on the weight of the total solids in the liquid parting agent emulsion;
- wherein the liquid parting agent emulsion is free of thermoset polyurethane polymers, and
- wherein the liquid parting agent emulsion is applied at a coating weight of 90 g/100 sq. ft to 500 g/100 sq. ft.
A roofing membrane comprising:
- an asphalt-coated substrate comprising a substrate at least partially impregnated with a first asphalt coating composition comprising paving-grade asphalt, the substrate having an upper surface and a lower surface;
- a liquid parting agent emulsion applied to the upper surface of the asphalt-coated substrate, the liquid parting agent emulsion consisting of:
- up to 40 wt. % of a polypropylene emulsion, based on the weight of the total solids in the liquid parting agent emulsion;
- at least 5 wt. % of at least one mineral filler, based on the weight of the total solids in the liquid parting agent emulsion;
- optionally, one or more of a dispersant, a defoaming agent, and a colorant;
- and
- water,
- wherein the liquid parting agent emulsion is applied at a coating weight of 90 g/100 sq. ft to 500 g/100 sq. ft.
A method of forming a roofing membrane, the method comprising the steps of:
- at least partially impregnating a substrate with a first asphalt coating composition, forming an asphalt-coated substrate, the substrate having an upper surface and a lower surface;
- and
- applying a liquid parting agent emulsion to the upper surface of the asphalt-coated substrate, the liquid parting agent emulsion comprising:
- up to 40 wt. % of a polypropylene emulsion, based on the weight of the total solids in the liquid parting agent emulsion;
- and
- at least 5 wt. % of at least one mineral filler, based on the weight of the total solids in the liquid parting agent emulsion,
- wherein the liquid parting agent emulsion is applied at a coating weight of 90 g/100 sq. ft to 500 g/100 sq. ft.
Dependencies are inferred from the claim text.