High-strength stain-resistant TPU (thermoplastic polyurethane) material and preparation method thereof

The invention discloses a high-strength stain-resistant TPU (thermoplastic polyurethane) material and a preparation method thereof. The high-strength stain-resistant TPU material is prepared from the following raw materials in parts by mass: 30 to 70 parts of TPU and 5 to 20 parts of cross-linking agent, and the cross-linking agent contains an organic silicon oxygen chain segment and is terminated by isocyanato. The preparation method comprises the following step: carrying out melting reaction on TPU and the cross-linking agent in a protective atmosphere to obtain the high-strength stain-resistant TPU material. According to the invention, the smudginess resistance of the material can be obviously improved, a micro-crosslinking structure can be introduced, the molecular weight of the material is obviously improved, and the physical properties and smudginess resistance of the composite material are further improved. 本发明公开了一种高强度耐脏污TPU材料及其制备方法。以质量份计，高强度耐脏污TPU材料的原料组成包括30-70份TPU和5-20份交联剂；交联剂含有机硅氧链段且由异氰酸根封端。制备方法：在保护