Copolyester containing aromatic secondary amine structure as well as preparation method and application of copolyester

• Main Authors: FU TENG, NI YANPENG, WANG XIULI, DUAN PINGHUI, WU WANSHOU, WANG YUZHONG, CHEN LIN
• Format: Patent
• Language: Chinese; English
• Published: 21.12.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a copolyester containing an aromatic secondary amine structure and a preparation method and application thereof, the copolyester is composed of structural units represented by I, II and III, and the intrinsic viscosity [eta] of the copolyester is 0.30-3.5 dL/g; the limit oxygen index ranges from 23.0% to 55.0%; the vertical combustion grade is V-2 to V-0 grade; and the tensile strength is increased by 5-300% compared with that of pure PET. Due to the tackifying effect and the charring effect of the introduced flame-retardant unit containing the aromatic secondary amine structure during combustion, the copolyester not only has excellent flame retardance and molten drop resistance, but also has better smoke suppression performance; can be independently applied to the fields of fibers, non-woven fabrics, engineering plastics, film materials, container materials, self-repairing materials, shape memory materials or 3D printing materials, or can be used as an additive for modification of hig