Organosilicon modified thermoplastic polyurethane resin for 3D printing and preparation method thereof

• Main Authors: GUO XINGLONG, ZHANG ZHENCHONG, JI CHANGXING, HAN HENG, MA JINQIU
• Format: Patent
• Language: Chinese; English
• Published: 18.04.2023
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

The invention belongs to the technical field of 3D printing thermoplastic polyurethane materials, and particularly relates to organic silicon modified thermoplastic polyurethane resin for 3D printing and a preparation method of the organic silicon modified thermoplastic polyurethane resin. The organosilicone modified thermoplastic polyurethane resin for 3D printing comprises a component A and a component B. The component A is a-OH terminated polyurethane prepolymer prepared through a reaction of polyol and isocyanate, and the R value of the component A is 0.95-0.98. The component B comprises-NCO terminated organosilane and a catalyst; the molar ratio of-OH in the component A to-NCO in the component B is 1: 1. According to the invention, the temperature resistance of the polyurethane resin is improved, and the mechanical strength of a melt is improved, so that the feeding stability during 3D printing is ensured, and the polyurethane resin has good mechanical properties and better melt flowability. The inventio