US 12,435,182 B2
Manufacturing method of polyester for plastic wrap
Te-Chao Liao, Taipei (TW); Jung-Jen Chuang, Taipei (TW); and Tzu-Huan Wong, Taipei (TW)
Assigned to NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed by NAN YA PLASTICS CORPORATION, Taipei (TW)
Filed on Dec. 15, 2022, as Appl. No. 18/081,708.
Claims priority of application No. 111143216 (TW), filed on Nov. 11, 2022.
Prior Publication US 2024/0158570 A1, May 16, 2024
Int. Cl. C08G 63/183 (2006.01); C08J 5/18 (2006.01); C09D 167/02 (2006.01)
CPC C08G 63/183 (2013.01) [C08J 5/18 (2013.01); C09D 167/02 (2013.01); C08J 2367/02 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A manufacturing method of a polyester for a plastic wrap, comprising:
providing an aromatic carboxylic acid, an aliphatic carboxylic acid and an aliphatic alcohol, wherein the aromatic carboxylic acid comprises at least two from the group consisting of a phthalic acid, an isophthalic acid, and a terephthalic acid; and
obtaining a polybutylene adipate terephthalate by subjecting the aromatic carboxylic acid, the aliphatic carboxylic acid, and the aliphatic alcohol to at least an esterification reaction, a pre-polymerization reaction and a polymerization reaction in sequence,
wherein in the polybutylene adipate terephthalate, a ratio of a number of moles of the aromatic carboxylic acid to a number of moles of the aliphatic carboxylic acid ranges from 0.55:0.45 to 0.2:0.8, and the polybutylene adipate terephthalate accounts for more than 95 wt % of the plastic wrap.