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US 12,552,930 B2Granted
Thermoplastic polyurethane composition
AssigneeLubrizol Advanced Materials, Inc.
InventorsVahab Solouki Bonab, Kenneth H. Kim, Aditi Shankar
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Abstract
The invention relates to an article made from a thermoplastic polyurethane composition having that has high flex modulus, low density, and is capable of withstanding repeated cyclic deformation. The thermoplastic polyurethane composition is formed from the reaction product of a polyol component, which includes a blend of a polyether polyol, such as poly(tetramethylene ether glycol), and polybutadiene diol, a diisocyanate component, and a chain extender component.
Claims23
An article comprising:
- a thermoplastic polyurethane composition having a flex modulus measured according to ASTM D790 of at least 160 MPa that can withstand at least 30,000 low temperature fatigue cycles measured according to ASTM D1052 at −10° C., wherein the thermoplastic polyurethane composition comprises the reaction product of a polyol component comprising a mixture of a polyether polyol and an unsaturated polybutadiene polyol in a weight ratio from 90:10 to 40:60 or, a diisocyanate component, and a chain extender component, wherein the thermoplastic polyurethane has a hard segment content of 49% to 80% by weight, wherein the hard segment content is defined as the combined weight of the diisocyanate component and the chain extender component.
A method of making an article, comprising:
- molding, extruding, or 3D printing a thermoplastic polyurethane composition having a flex modulus measured according to ASTM D790 of at least 160 MPa that can withstand at least 30,000 low temperature fatigue cycles measured according to ASTM D1052 at −10° C. to form an article, wherein the thermoplastic polyurethane composition comprises the reaction product of a polyol component comprising a mixture of a polyether polyol and an unsaturated polybutadiene polyol in a weight ratio from 90:10 to 40:60 or, a diisocyanate component, and a chain extender component, wherein the thermoplastic polyurethane has a hard segment content of 49% to 80% by weight, wherein the hard segment content is defined as the combined weight of the diisocyanate component and the chain extender component.
Dependencies are inferred from the claim text.