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 2:
3. The flame retardant and antistatic regenerated polyester wig fiber of claim 1, wherein the modified flame retardant regenerated polyester is prepared by following steps:
(1) cutting, grinding, washing, and drying the waste PET bottle flake to keep a 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 by a weight of 4-6 times a weight of the waste PET bottle flake powder, zinc acetate in a weight ratio of 4-8% to a total weight of the waste PET bottle flake powder, and ethylene terephthalate (BHET) in a weight ratio of 1-3% to the total weight of the waste PET bottle flake powder into the alcoholysis reactor, conducting an alcoholysis reaction at a temperature of 210° C.-250° C. and a vacuum degree of 0.3-0.5 MPa for 15-25 min, and then filtering a molten PET bottle flake material after alcoholysis to obtain an alcoholysis product BHET;
(3) preparing a flame retardant suspension with the composite flame retardant composed of the PSPPP, the derivative of DOPO-FT, and the DOPO-TPN with the mass ratio of (2-4):(0.5-2):(3-5) and ethylene glycol by ultrasonic oscillation; and
(4) adding the alcoholysis product BHET obtained in step (2) and the flame retardant suspension obtained in step (3) into a polymerization reactor together with antimony trioxide and polyphosphoric acid to react at a temperature of 265° C.-275° C. for 4-5 h while maintaining a vacuum degree of 0.9-1 MPa, which is regarded as a system, then causing the system at 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 flame retardant regenerated polyester masterbatch.