Asphalt compositions containing acrylonitrile-butadiene-styrene copolymer
AssigneeGeneral Electric Company
InventorG. Fred Willard
Life of this patent
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Abstract
An improved asphalt composition is provided with the addition of a graft copolymer resin comprising a rubbery polymeric substrate and a rigid polymeric superstrate. A preferred graft copolymer resin is acrylonitrile-butadiene-styrene copolymer resin. Preferred compositions have increased temperature range performance and/or decreased penetration values as compared to the same compositions not containing the graft copolymer resins. The asphalt compositions may optionally contain a vulcanized rubber, preferably obtained from scrap tires.
Claims24
An asphalt composition comprising:
- a) an asphalt;
- b) a graft copolymer resin comprising a rubbery polymeric substrate and a rigid polymeric superstrate;
- and
- c) at least one additional component selected from the group consisting of aggregate, vulcanized rubber, reinforcing fiber, block copolymer resin, and oil.
An asphalt composition consisting essentially of:
- a) an asphalt;
- b) a graft copolymer resin comprising a rubbery polymeric substrate and a rigid polymeric superstrate;
- and
- c) at least one additional component selected from the group consisting of aggregate, vulcanized rubber, reinforcing fiber, block copolymer resin, and oil.
A method of increasing the viscosity of an asphalt composition wherein the asphalt composition is admixed with a graft copolymer resin comprising a rubbery polymeric substrate and a rigid polymeric superstrate;
- wherein the asphalt composition further comprises at least one additional component selected from the group consisting of aggregate, vulcanized rubber, reinforcing fiber, block copolymer resin, and oil.
A method of increasing the temperature range performance of an asphalt composition wherein the asphalt composition is admixed with a graft copolymer resin comprising a rubbery polymeric substrate and a rigid polymeric superstrate;
- wherein the asphalt composition further comprises at least one additional component of aggregate, vulcanized rubber, reinforcing fiber, block copolymer resin, and oil.
Dependencies are inferred from the claim text.