Lubrizol Advanced Materials, Inc.

Edward W Ault

Joseph J Vontorcik, Jr

An Plessers

Geert Vermunicht

John M Cox

Jr Joseph J Vontorcik

Joseph J Vontorcik

The present invention relates to systems and methods for solid freeform fabrication, especially fused deposition modeling, as well as various articles made using the same, where the systems and methods utilize certain thermoplastic polyurethanes which are particularly suited for such processing. The useful thermoplastic polyurethanes are derived from (a) a polyisocyanate component, (b) a polyol component, and (c) an optional chain extender component where the resulting thermoplastic polyurethane has a crystallization temperature above 80° C. and retains more than 20% of its shear storage modulus at 100° C. relative to its shear storage modulus at 20° C.

Methods of using thermoplastic polyurethanes in fused deposition modeling and systems and articles thereof

The present invention relates to systems and methods for solid freeform fabrication, especially selective laser sintering, as well as various articles made using the same, where the systems and methods utilize certain thermoplastic polyurethanes which are particularly suited for such processing. The useful thermoplastic polyurethanes are derived from (a) a polyisocyanate component, (b) a polyol component, and (c) an optional chain extender component; wherein the resulting thermoplastic polyurethane has a melting enthalpy of at least 5.5J/g, a Tc (crystallization temperature) of more than 70&#xb0; C., a &#x394;(Tm:Tc) of from 20 to 75 degrees, where &#x394;(Tm:Tc) is the difference between the Tm (melting temperature) and Tc.

Methods of using thermoplastic polyurethanes in selective laser sintering and systems and articles thereof

The present invention relates to systems and methods for solid freeform fabrication, especially selective laser sintering, as well as various articles made using the same, where the systems and methods utilize certain thermoplastic polyurethanes which are particularly suited for such processing. The useful thermoplastic polyurethanes are derived from (a) a polyisocyanate component, (b) a polyol component, and (c) an optional chain extender component; wherein the resulting thermoplastic polyurethane has a melting enthalpy of at least 5.5 J/g, a Tc (crystallization temperature) of more than 70&#xb0; C., a &#x394;(Tm:Tc) of from 20 to 75 degrees, where &#x394;(Tm:Tc) is the difference between the Tm (melting temperature) and Tc.

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Grafton, OH, United States of America

Edward W Ault