Thermoplastic polyurethane precursor, and thermoplastic polyurethane, method of manufacturing the same and uses of the same

Abstract

A thermoplastic polyurethane precursor that can be used to prepare a polyurethane having a low initial yellowness index, high yellowing resistance, high thermal oxidative aging resistance, high hydrolysis resistance, and low fisheye. The thermoplastic polyurethane precursor includes a polyisocyanate, a chain extender, a polymer polyol, and a first auxiliary agent, wherein the first auxiliary agent includes: (d1) benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-C7-C9 branched alkyl esters; (d2) phosphorous acid, mixed 2,4-bis(1,1-dimethylpropyl)phenyl and 4-(1,1-dimethylpropyl)phenyl triesters; (d3) 4-tert-butyl-2-(5-tert-butyl-2-oxo-3H-benzofuran-3-yl)phenyl-3,5-di-tert-butyl-4-hydroxybenzoate; and (d4) at least one of a compound of formula (I) and a compound of formula (II), wherein R1 is a C12 alkenyl;

Dependencies are inferred from the claim text.