Back to results
US 4,374,944 AGranted
ABS Composition containing coal tar pitch
AssigneeUnited States Steel Corporation
InventorsDonald G. Ashburn, Glendon T. Steady
Life of this patent
Estimating the term…
Abstract
Coal tar pitch is blended with ABS (acrylonitrile-butadiene-styrene) molding or extrusion composition. The product produced therefrom is superior in some ways for applications such as pipe manufacture and meets generally accepted specifications therefor. Furthermore, such a product is less expensive than an ABS product without the coal tar pitch additive.
Claims12
An extended ABS type resinous plastic composition consisting essentially of:
- (a) polymerized acrylonitrile, butadiene and styrene constituting together at least about 50 percent of the composition by weight;
- and
- (b) coal tar pitch intimately mixed with said polymerized acrylonitrile, butadiene and styrene and constituting up to about 40 percent of said composition by weight.
An extended ABS type resinous plastic composition suitable for use in making pipe having high impact strength, tensile strength, and chemical resistance comprising:
- polymerized acrylonitrile, butadiene and styrene constituting together at least about 50 percent of the composition by weight;
- and
- coal tar pitch intimately mixed with said polymerized acrylonitrile, butadiene and styrene and constituting between 2 and 15 percent of the composition by weight:
- said coal tar pitch having a Mettler softening point in the range of about 75.degree. C. to about 120.degree. C.
1 more element
Dependencies are inferred from the claim text.