Thermoplastic elastomer composition
AssigneeUniroyal, Inc.
InventorHenno A. Petersen
Life of this patent
Estimating the term…
Abstract
Dynamically partially cured blends of monoolefin copolymer rubber with a polyolefin resin and a conjugated diene rubber are thermoplastic and can be fabricated into useful articles by conventional processing methods such as injection molding or extrusion.
Claims32
A thermoplastic elastomer comprising a dynamically partially cured blend of 10% to 80% monoolefin copolymer rubber, said monoolefin copolymer being an amorphous, random, elastomeric copolymer of two or more monoolefins, at least one of said monoolefins being ethylene, 5% to 50% polyolefin resin, said resin being a solid, high molecular weight resinous plastic material, and 10% to 80% conjugated diene natural or synthetic rubber having an amount of unsaturation on the order of that occurring in Hevea rubber, wherein the percentages are percent by weight of the total composition, said blend being crosslinked only to an extent that will not prevent its becoming knit together into a coherent mass when processed on conventional rubber or plastic processing machinery.
A method of preparing a thermoplastic elastomer comprising dynamically partially curing a mixture which comprises 10% to 80% monoolefin copolymer rubber, said monoolefin copolymer being an amorphous, random, elastomeric copolymer of two or more monoolefins, at least one of said monoolefins being ethylene, 5% to 50% polyolefin resin, said resin being a solid, high molecular weight resinous plastic material, and 10% to 80% conjugated diene natural or synthetic rubber, wherein the percentages are percentages by weight of the total composition, said blend being crosslinked only to an extent that will not prevent its becoming knit together into a coherent mass when processed on conventional rubber or plastic processing machinery.
Dependencies are inferred from the claim text.