Polyester-modified polybutadienols for producing polyurethane elastomers and thermoplastic polyurethanes
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United States of America Patent
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Jul 20, 2021
Grant Date -
Aug 24, 2017
app pub date -
Aug 17, 2015
filing date -
Aug 18, 2014
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Abstract
The invention relates to polyurethanes obtainable by reaction of (a) polyisocyanates A selected from modified or unmodified 4,4′-methanediphenyl diisocyanate, higher nuclear homologs of 4,4′-methanediphenyl diisocyanate, isocyanated groups containing prepolymers based on 4,4′-methanediphenyl diisocyanate, and mixtures thereof, with (b) compounds having at least two isocyanate-reactive hydrogen atoms, comprising (b1) block copolymers formed from a polybutadienol and a cyclic ester as component B1, and (b2) low molecular weight extenders or crosslinkers each having a molecular weight of 62 to 500 g/mol as component B2.
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