A HYBRID RUNNING TRACK ARTICLE AND METHOD FOR PREPARING THE SAME
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United States of America Patent
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Issued Date -
Dec 21, 2023
app pub date -
Dec 8, 2020
filing date -
Dec 8, 2020
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The present application provides a hybrid running track article, comprising, from top to bottom: (I) a top coating layer made from a first composition comprising an externally emulsified polyurethane dispersion and rubber particles, wherein the externally emulsified polyurethane dispersion is derived from: (Ai) an isocyanate component comprising one or more compounds having at least two isocyanate groups, (Bi) an isocyanate-reactive component comprising one or more compounds having at least two isocyanate-reactive groups; (Ci) an optional catalyst, (Di) an external emulsifier, (Ei) a chain extender and (Fi) water, and (II) a bottom layer made from a second composition comprising a 1K solvent-free polyurethane binder and rubber particles.
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