Process for making molded thermoplastic polyurethane articles ex

Details Process for making molded thermoplastic polyurethane articles ex Process for making molded thermoplastic polyurethane articles ex

1996-10-31

1998-07-28

Niland, Patrick D.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

26433119, 524 91, 524323, 525 66, 525123, 525308, 525455, C08J 500, C08K 320, C08L 7500, C08F 830

Patent

active

057859167

ABSTRACT:
Instant invention provides thermoplastic polyurethane compositions comprising one or more thermoplastic polyurethanes A) one or more acrylate based rubbers B), and one or more UV and/or heat stabilizers C), wherein the thermoplastic polyurethane composition of A)+B)+C) has a greater UV stability as compared to a thermoplastic polyurethane composition of A)+C), wherein (a.) UV stability is measured as the difference between (1.) Delta E versus white tile after molded, and (2.) Delta E versus white tile after 1000 hours of QUV (b.) increasing stability is indicated by minimization of the difference between (1.) and (2.).
The invention further provides a process of making molded thermoplastic polyurethane articles using the aforementioned thermoplastic polyurethane compositions.

REFERENCES:
patent: 4317890 (1982-03-01), Goyert et al.
patent: 5240975 (1993-08-01), Winter et al.

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