Thermoplastic polyurethane foamed articles comprising a thermoplastic polyurethane composition and an epoxy, functional styrene acrylic copolymer
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United States of America Patent
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Jan 30, 2018
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app pub date -
Nov 20, 2014
filing date -
Nov 20, 2013
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Abstract
A thermoplastic polyurethane foamed article has a plurality of bubbles distributed throughout the thermoplastic polyurethane foamed article and comprises a thermoplastic polyurethane composition and an epoxy-functional styrene acrylic copolymer which are foamed in the presence of a blowing agent. The epoxy-functional styrene acrylic copolymer is present in an amount ranging from 0.1 to 5% of the total combined weight of the thermoplastic polyurethane composition and the epoxy-functional styrene acrylic copolymer. The thermoplastic polyurethane foamed article has an average diameter of the plurality of bubbles ranging from 50 to 120 μm with at least 75% of the plurality of bubbles having a diameter of less than 200 μm.
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