Manufacturing method of polyester
AssigneeNan Ya Plastics Corporation
InventorsChing-Yao Yuan, Cheng-Shui Huang, Chung Yu Chen, Mong-Chen Chang, Zhang-Jian Huang
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Abstract
A manufacturing method of a polyester includes: providing a recycled material, ethylene glycol, and a catalyst, in which the recycled material includes PET; performing a depolymerization step with use of the recycled material, the ethylene glycol, and the catalyst to obtain a BHET crude product; performing a purification step with use of the BHET crude product to obtain a BHET monomer; providing a phosphorus-containing monomer; and performing an esterification step and a polymerization step with use of the BHET monomer and the phosphorus-containing monomer.
Claims10
A manufacturing method of a polyester, comprising:
- providing a recycled material, ethylene glycol, and a catalyst, wherein the recycled material comprises polyethylene terephthalate;
- performing a depolymerization step with use of the recycled material, the ethylene glycol, and the catalyst to obtain a bis(2-hydroxyethyl) terephthalate crude product;
- performing a purification step with use of the bis(2-hydroxyethyl) terephthalate crude product to obtain a bis(2-hydroxyethyl) terephthalate monomer;
- providing a phosphorus-containing monomer;
- and
- performing an esterification step and a polymerization step with use of the bis(2-hydroxyethyl) terephthalate monomer and the phosphorus-containing monomer.
Dependencies are inferred from the claim text.