Patent ID: 11937655
Assignee: XUCHANG HONGYANG BIOCHEMICAL INDUSTRIAL DEVELOPMENT CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC A  C  D | IPC A  C

Claim 3:
4. The flame retardant and antistatic regenerated polyester wig fiber of claim 1, wherein the modified antistatic regenerated polyester is prepared by following steps:
(1) cutting, grinding, washing, and drying the waste PET bottle flake to keep the moisture content within 50 ppm to obtain waste PET bottle flake powder;
(2) placing the waste PET bottle flake powder obtained in step (1) into an alcoholysis reactor and adding an ethylene glycol solution 4-6 times the weight of the waste PET bottle flake powder, adding zinc acetate in a weight ratio of 4-8% to a total mass of the waste PET bottle flake powder, and adding ethylene terephthalate (BHET) in a weight ratio of 1-3% to the total mass of the waste PET bottle flake powder, respectively to conduct an alcoholysis reaction at 210-250° C. and 0.3-0.5 MPa for 15-25 min, and then filtering a molten PET bottle flake material after alcoholysis to obtain the alcoholysis product BHET;
(3) preparing an antistatic suspension: preparing a uniform antistatic suspension with the biomass-derived graphene and ethylene glycol by ultrasonic oscillation; and
(4) adding the alcoholysis product BHET obtained in step (2) and the antistatic suspension obtained in step (3) into a polymerization reactor together with antimony trioxide and polyphosphoric acid to react at 255° C.-265° C. for 3-4 h while maintaining a vacuum degree of 1-1.2 MPa to obtain a system, then reducing the system to 25° C. and 0.1 MPa at a uniform speed of 5° C./min and 16 kPa/min after the reaction, and then cooling in a cold water tank and pelletizing to obtain the modified antistatic regenerated polyester masterbatch.