Abstract: A novel thermoplastic, elastomeric material is obtained by curing under shear conditions (e.g. in a high shear internal mixer) a blend of vulcanizable rubber (e.g. SBR, EPDM) and a bituminous material (e.g., asphalt) in the presence of a rubber vulcanizing agent (e.g. sulfur or peroxide). The product has a unique combination of elastomeric and thermoplastic properties. It can be processed by conventional thermoplastic methods at elevated temperatures (e.g. extrusion, calendering, vacuum forming) and at normal temperatures possesses good elastomeric properties without the need for subsequent vulcanization. If desired, the material can be re-processed.

Abstract: Thermoplastic blends of a minor amount of chlorinated polyethylene with a major proportion of thermoplastic polyurethane elastomer have good processing and mold release properties. Thermoplastic blends of a minor amount of thermoplastic polyurethane elastomer with a major proportion of chlorinated polyethylene have good strength properties and processing characteristics. Sheets made from the blends have good vacuum-forming properties and low temperature flexibility.