Asphalt-block copolymer roofing composition
AssigneeShell Oil Company
InventorsRichard Gelles, Mark A. Berggren
Life of this patent
Estimating the term…
Abstract
A composition for use in roll roofing membrane applications which comprise: (a) from about 1 part to about 50 parts per hundred of filler, and (b) from about 50 parts to about 99 parts per hundred of a bituminous composition which is comprised of (1) from about 87 to about 93 parts per hundred of a bituminous component having a penetration of greater than about 125 dmm at 25.degree. C., and (2) from about 7 to about 13 parts per hundred of a hydrogenated block copolymer of a monoalkenyl aromatic hydrocarbon and a conjugated diolefin having a contour arm molecular weight before hydrogenation of from about 80,000 to about 150,000 and a polystyrene content of from about 25% to about 37%.
Claims4
A composition for use in roll roofing membrane applications which comprises:
- (a) from about 1 part to about 50 parts per hundred of filler, and
- (b) from about 50 parts to about 99 parts per hundred of a bituminous composition which is comprised of
- (1) from about 87 to about 92 parts per hundred of a bituminous component having a penetration of greater than about 125 dmm at 25.degree. C., and
- (2) from about 7 to about 13 parts per hundred of a hydrogenated block copolymer of a monoalkenyl aromatic hydrocarbon and a conjugated diolefin having a contour arm molecular weight before hydrogenation of from about 80,000 to about 150,000 and a polystyrene content of from about 25% to about 37%, the molecular weight being peak molecular weight determined by gel permeation chromatography.
A composition for use in roll roofing membrane applications which consists of:
- (a) from about 1 part to about 50 parts per hundred of filler, and
- (b) from about 50 parts to about 99 parts per hundred of a bituminous composition which consists of
- (1) from about 87 to about 93 parts per hundred of a bituminous component having a penetration of greater than about 125 dmm at 25.degree.C., and
- (2) from about 7 to about 13 parts per hundred of a hydrogenated block copolymer of a monoalkenyl aromatic hydrocarbon and a conjugated diolefin having a contour arm molecular weight before hydrogenation of from about 120,000 and a polystyrene content of from about 25% to about 37%, the molecular weight being peak molecular weight determined by gel permeation chromatography.
A process for making a roll roofing membrane which consists of:
- (i) providing a composition consisting of
- (a) from about 1 part to about 50 parts per hundred of filler, and
- (b) from about 50 parts to about 99 parts per hundred of a bituminous composition which consists of
- (1) from about 87 to about 93 parts per hundred of a bituminous component having a penetration of greater than about 125 dmn at 25.degree.C.,
- (2) from about 7 to about 13 parts per hundred of a hydrogenated block copolymer of a monoalkenyl aromatic hydrocarbon and a conjugated diolefin having a contour arm molecular weight before hydrogenation of about 120,000 and a polystyrene content of from about 25% to about 37%, the molecular weight being peak molecular weight determined by gel permeation chromatography, and
- (ii) applying said composition to a reinforcing mat.
Dependencies are inferred from the claim text.