US 11,306,177 B2 · Thermoplastic polyurethane

Abstract

The present invention relates to thermoplastic polyurethanes obtainable or obtained by reaction of at least one polyisocyanate composition, at least one chain extender (KV1) of general formula (I) and one further chain extender (KV2) selected from the group consisting of compounds having at least two isocyanate-reactive groups having a molecular weight of <500 g/mol, and at least one polyol composition. The present invention further relates to a production process for such thermoplastic polyurethanes and to the use of a thermoplastic polyurethane according to the invention or of a thermoplastic polyurethane obtainable or obtained by a process according to the invention for producing extrusion products, films and molded articles.

Claims16

Dependent claims

A thermoplastic polyurethane obtained by reaction of

at least a polyisocyanate composition;
hydroxyquinone bis(2-hydroxyethyl)ether as a first chain extender;
a polyol composition;
and
a second chain extender,
wherein the second chain extender has at least two isocyanate-reactive groups and has a molecular weight of <500 g/mol, and
the second chain extender is a compound of general formula (II):
wherein
A is O, N(R3), S, or CH2,
Q is O, N(R3), S, or CH2,
R1 is CH2—(CH2)n—OH, CH(CH3)—CH2—OH, or OH,
R2 is CH2—(CH2)n—OH, CH(CH3)—CH2—OH, CH2—CH(CH3)—OH, or OH,
n is 0, 1, 2, 3, 4, 5 or 6, and
R3 is CH3, or CH2—CH3,
wherein
a molar ratio of hydroquinone bis(2-hydroxyethyl)ether to the second chain extender is in a range of 9:1 to 19:1;
and
the polyol present in the polyol composition is a polyetherol.

15 more elements

Dependencies are inferred from the claim text.

Thermoplastic polyurethane

Life of this patent

Thermoplastic polyurethane

Life of this patent

Abstract

Claims16