Cross-linked thermoplastic polyurethane/polyurea and method...

Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface

Reexamination Certificate

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C264S279100

Reexamination Certificate

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07540990

ABSTRACT:
A process for forming a cross-linked thermoplastic polymer is disclosed herein. The cross-linked thermoplastic polymer is formed by heating a first mixture containing a thermoplastic urethane base material, a monomeric diisocyanate comprising between 1 to 10% of the total weight of the first mixture, and a second mixture of a first diamine and a second diamine comprising between 1 to 10% of the total weight of a total reaction product. The heated first mixture, which is flowable, is injected into at least one injection molding device, with the second mixture injected at predetermined intervals to create a homogeneous reaction product.

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patent: 6939924 (2005-09-01), Kim et al.
patent: 2002/0039935 (2002-04-01), Dewanjee
patent: 2003/0065124 (2003-04-01), Rosenberg et al.
patent: 2007/0155895 (2007-07-01), Rukavina et al.
Estane 58130 TPU Product Data Sheet, Estane Thermoplastic Polyurethanes (2001), 2 pages.

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