Polyamide-polyolefin compositions
AssigneeStandard Oil Company (Indiana)
InventorsEdward F. Paschke, Michael A. Stasi, Edward F. Rader
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Abstract
Compositions of amorphous polyamides which are thermoplastic and characterized by an improved impact resistance which comprise terephthalamide and/or isophthalamide polymers, physically blended with polyolefin polymers.
Claims8
A composition comprising a polyamide of amorphous structure and a polyolefin selected from the group consisting of low density polyethylene, high density polyethylene and polypropylene wherein said composition is characterized by improved impact resistance and contains said polyolefin from about 2.5 to 5 percent by weight of the combined weight of said polyamide and said polyolefin, said polyamide being selected from the group consisting of polymers and copolymers of terephthalamide and isophthalamide wherein said terephthalamide and isophthalamide are present in ratios by weight of from 100 parts to zero parts per hundred isophthalamide and from zero parts to 100 parts per hundred terephthalamide.
A process for producing a composition comprising a polyamide of amorphous structure and a polyolefin selected from the group consisting of low density polyethylene, high density polyethylene and polypropylene wherein said composition is characterized by improved impact resistance and contains said polyolefin from about 2.5 to 5 percent by weight of the combined weight of said polyamide and said polyolefin, said polyamide being selected from the group consisting of polymers and copolymers of terephthalamide and isophthalamide wherein said terephthalamide and isophthalamide are present in ratios by weight of from 100 parts to zero parts per hundred isophthalamide and from zero parts to 100 parts per hundred terephthalamide which process comprises melt mixing said polyamide and said polyolefin at a temperature at which said polyamide has been thermally softened, subjecting the mass of said polyamide and polyolefin to a pressure in excess of 500 pounds per square inch.
Dependencies are inferred from the claim text.