Solar heat reflective roofing membrane and process for making the same
First Claim
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1. A process for preparing a roofing membrane with solar heat-reflectance, the process comprising:
- laminating a tie-layer to a bituminous base sheet to form an intermediate sheet, the bituminous base sheet comprising a continuous substrate sheet of fibrous material, the continuous substrate sheet being saturated with a bituminous material and coated on at least one side with a bituminous material;
depositing a solar heat-reflective polymeric coating composition directly on the intermediate sheet;
curing the solar heat-reflective polymeric coating composition to form a solar heat-reflective coating; and
depositing an upper coating composition directly on the solar heat-reflective coating to form an upper coating layer;
wherein the tie-layer is laminated to the bituminous base sheet by heating the surface of the base sheet to above the softening temperature of the bituminous material, and adhering the tie-layer to the base sheet by contacting the base sheet with the tie-layer and permitting the bituminous material to partially saturate the tie-layer.
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Abstract
A roofing membrane with high solar heat reflectance includes a bituminous base sheet, a tie-layer with a reinforcement material, and a solar heat-reflective upper layer.
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Citations
20 Claims
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1. A process for preparing a roofing membrane with solar heat-reflectance, the process comprising:
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laminating a tie-layer to a bituminous base sheet to form an intermediate sheet, the bituminous base sheet comprising a continuous substrate sheet of fibrous material, the continuous substrate sheet being saturated with a bituminous material and coated on at least one side with a bituminous material; depositing a solar heat-reflective polymeric coating composition directly on the intermediate sheet; curing the solar heat-reflective polymeric coating composition to form a solar heat-reflective coating; and depositing an upper coating composition directly on the solar heat-reflective coating to form an upper coating layer; wherein the tie-layer is laminated to the bituminous base sheet by heating the surface of the base sheet to above the softening temperature of the bituminous material, and adhering the tie-layer to the base sheet by contacting the base sheet with the tie-layer and permitting the bituminous material to partially saturate the tie-layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A process for preparing a roofing membrane with solar heat-reflectance, the process comprising:
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depositing a solar heat-reflective polymeric coating composition directly on a tie-layer to form an intermediate sheet; curing the solar heat-reflective polymeric coating composition to form a solar heat-reflective coating on top of the tie-layer; laminating the tie-layer of the intermediate sheet directly to a bituminous base sheet, the bituminous base sheet comprising a continuous substrate sheet of fibrous material, the continuous substrate sheet being saturated with a bituminous material and coated on at least one side with a bituminous material; and depositing an upper polymeric coating composition directly on the solar heat-reflective coating to form an upper coating layer; wherein the tie-layer is laminated to the bituminous base sheet by heating the surface of the base sheet to above the softening temperature of the bituminous material, and adhering the tie-layer to the base sheet by contacting the base sheet with the tie-layer and permitting the bituminous material to partially saturate the tie-layer. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of constructing a roof having solar heat reflectance, the method comprising adhering to a roofing deck a roofing membrane with solar heat reflectance, the roofing membrane comprising:
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a bituminous base sheet comprising a continuous substrate sheet of fibrous material, the continuous substrate sheet being saturated with a bituminous material and coated on at least one side with a bituminous material; a tie-layer comprising a reinforcement material laminated directly to the bituminous base sheet; a solar heat-reflective layer deposited directly onto the tie-layer; and a protective top coating deposited directly onto the solar heat-reflective layer; wherein the tie-layer is laminated to the bituminous base sheet by heating the surface of the base sheet to above the softening temperature of the bituminous material, and adhering the tie-layer to the base sheet by contacting the base sheet with the tie-layer and permitting the bituminous material to partially saturate the tie-layer. - View Dependent Claims (17, 18, 19, 20)
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Specification