Thermoplastic urethane elastomer

Details Thermoplastic urethane elastomer Thermoplastic urethane elastomer

1993-10-12

1995-10-17

Marquis, Melvyn I.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 368, 428 3692, 2642091, 604280, 525458, A61M 2500

Patent

active

054589355

ABSTRACT:
The invention provides a thermoplastic polyurethane elastomer which contains a blend of polyurethane resins and is suitable for use in the form of tubing. The blend has a tensile strength of more than 7000 psi and an ultimate elongation greater than 200%. The blend contains about 50% to about 80% by weight of an elastomeric polyurethane resin having a hardness in the range of about 60 to 70 Shore D units. The blend additionally contains about 20% to about 50% of a relatively rigid polyurethane resin having a hardness of about 10 units more than the elastomeric resin. The invention also provides methods for using and methods for manufacturing tubing fabricated from the thermoplastic polyurethane elastomer. Preferred extrusion conditions are described.

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patent: 5149722 (1992-09-01), Soukup
patent: 5192607 (1993-03-01), Soukup
patent: 5254618 (1993-10-01), Ohashi et al.
patent: 5281677 (1994-01-01), Onwunaka et al.
patent: 5322874 (1994-06-01), Fujii et al.

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