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US 8,791,193 B2Granted
Non-black rubber membranes
AssigneeFirestone Building Products Company, LLC
InventorsHao Wang, James A. Davis, William F. Barham, Jr.
Life of this patent
Estimating the term…
Abstract
A roofing membrane comprising an olefinic rubber; and from about 20 to about 250 parts by weight of a silica filler per 100 parts by weight rubber; wherein the silica filler is chemically coupled to the olefinic rubber; and wherein the roofing membrane is non-black.
Claims15
A laminate membrane comprising:
- a first layer including an olefinic rubber including units deriving from ethylene, α-olefin, and diene monomer, where the olefinic rubber includes at least 1.5 percent by weight and less than 4 percent by weight units deriving from diene monomer;
- at least 20 parts by weight and less than 90 parts by weight titanium dioxide per 100 parts by weight rubber;
- and silica, where at least a portion of the silica is coupled to the elastomeric olefinic rubber;
- a second layer including cured elastomeric olefinic copolymer and carbon black;
- and
- optionally a scrim fabric.
3 more elements
Dependencies are inferred from the claim text.