Aliphatic polyester resin powder suitable for selective laser sintering and its preparation method

US10787546B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION · CN

Inventors

• Jianye LIU · Beijing, CN
• Liqiu CHU · Beijing, CN
• Yun LYU · Beijing, CN
• Shijun Zhang · Beijing, CN
• Liying Zhang · Singapore, SG
• Hao ZOU · Nanhu, CN
• Mu DONG · Beijing, CN
• Dali GAO · Beijing, CN
• Baige CHOU · Beijing, CN
• Yiqing BAI · Beijing, CN
• Jingbo Shao · Beijing, CN
• Meng Xu · San Jose, US
• Yihui Tom Xu · Shanghai, CN
• Ruoshi Chen · Beijing, CN

Key dates

• Filing date: Apr 13, 2018
• Grant date: Sep 29, 2020
• Expiry date: Dec 17, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2367/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method for preparing an aliphatic polyester resin powder includes the steps ofa) heat dissolving a crystalline aliphatic polyester resin in an organic solvent to obtain an aliphatic polyester resin solution;b) cooling the aliphatic polyester resin solution to precipitate a solid, thereby obtaining a solid-liquid mixture;c) optionally adding an adjuvant to the solid-liquid mixture and mixing; andd) conducting solid-liquid separation and drying to obtain an aliphatic polyester resin powder suitable for selective laser sintering.The crystalline aliphatic polyester resin powder obtained has good antioxidant property, good powder flowability, moderate size, smooth surface, suitable bulk density, and suitable dispersibility and particle size distribution. The aliphatic polyester resin powder is particularly suitable for selective laser sintering method.