WEATHERPROOF UNDERLAYMENT WITH HIGH FILLER CONTENT POLYMER ASPHALT LAYER
First Claim
1. A roofing membrane material comprising:
- a) fibrous mat having an upper surface and a lower surface;
b) a non-adhesive asphalt coating applied to said fibrous mat and generally completely saturating said fibrous mat and providing a layer of non-adhesive asphalt at least on said upper surface of said fibrous mat, said non-adhesive asphalt coating comprising an oxidized asphalt, a non-oxidized asphalt, a polyolefin melted with a polyethylene wax, and a filler material; and
c) an adhesive asphalt coating, applied to the lower surface of the non-adhesive asphalt saturated mat.
2 Assignments
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Accused Products
Abstract
A roofing membrane underlayment material includes a fibrous mat generally encapsulated within a non-adhesive asphalt coating, the resulting encapsulated mat having an adhesive asphalt layer applied to one surface thereof, typically the bottom surface. An acrylic, talc or granular coating is applied to the surface of the encapsulated mat that is not in contact with the adhesive asphalt layer. The non-adhesive asphalt coating is characterized in that it includes a high filler content made possible by the use of non-oxidized flux asphalt to which has been added a small percentage of an asphalt additive such as radial or linear polymer or other elastomer. The resulting membrane, when applied to a roofing deck, provides a high traction surface that will not adhere to shingles and provides an effective waterproofing seal on the roofing deck and is flexible in both hot and cold environments.
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Citations
20 Claims
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1. A roofing membrane material comprising:
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a) fibrous mat having an upper surface and a lower surface; b) a non-adhesive asphalt coating applied to said fibrous mat and generally completely saturating said fibrous mat and providing a layer of non-adhesive asphalt at least on said upper surface of said fibrous mat, said non-adhesive asphalt coating comprising an oxidized asphalt, a non-oxidized asphalt, a polyolefin melted with a polyethylene wax, and a filler material; and c) an adhesive asphalt coating, applied to the lower surface of the non-adhesive asphalt saturated mat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A roofing membrane material which comprises in combination:
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a) a fibrous mat having an upper surface and a lower surface; b) a non-adhesive asphalt coating applied to and generally completely saturating said fibrous mat, said non-adhesive asphalt coating comprising approximately 0.5% to 3% polyolefin, 10% to 60% filler, 10% to 40% non-oxidized asphalt and 10% to 40% to oxidized asphalt, and wherein said polyolefin is a radial copolymer selected from the group consisting of styrene-butadiene copolymers and styrene-butadiene-styrene copolymers; and c) an adhesive asphalt coating applied to the lower surface of the asphalt saturated fibrous mat. - View Dependent Claims (16, 17)
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18. A roofing membrane material that comprises in combination:
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a) a fibrous mat having an upper surface and a lower surface; b) a non-adhesive asphalt coating applied to and generally completely saturating at least one surface of said fibrous mat, said non-adhesive asphalt coating comprising approximately 20% to 95% of oxidized and/or non-oxidized asphalt, 0.5% to 30% thermoplastic polymer, 0.5% to 30% organic filler, 0% to 20% process oil and 5% to 60% inorganic filler material; and c) an adhesive asphalt coating applied to the lower surface of the asphalt saturated fibrous mat. - View Dependent Claims (19, 20)
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Specification