	US 12,344,705 B2
	Copolymerized polyester resin, molded product, and heat-shrinkable film
Satoru Nakagawa, Tsuruga (JP); Hideto Ohashi, Tsuruga (JP); Nobuyuki Hironaka, Tsuruga (JP); Hironao Sasaki, Osaka (JP); Kosuke Uotani, Tsuruga (JP); and Keiichiro Togawa, Otsu (JP)
Assigned to TOYOBO CO., LTD., Osaka (JP)
Appl. No. 17/276,477
Filed by TOYOBO CO., LTD., Osaka (JP)
PCT Filed Oct. 28, 2019, PCT No. PCT/JP2019/042138 § 371(c)(1), (2) Date Mar. 15, 2021, PCT Pub. No. WO2020/090720, PCT Pub. Date May 7, 2020.
Claims priority of application No. 2018-205331 (JP), filed on Oct. 31, 2018.
Prior Publication US 2022/0041800 A1, Feb. 10, 2022
Int. Cl. C08G 63/183 (2006.01); B29C 45/00 (2006.01); C08J 5/18 (2006.01); B29K 67/00 (2006.01); B29L 7/00 (2006.01)

CPC C08G 63/183 (2013.01) [B29C 45/0001 (2013.01); C08J 5/18 (2013.01); B29K 2067/003 (2013.01); B29L 2007/002 (2013.01)]

12 Claims

1. A copolymerized polyester resin which contains

(a) terephthalic acid, wherein terephthalic acid is the most abundant dicarboxylic acid component on a % by mole basis,

(b) ethylene glycol, wherein ethylene glycol is the most abundant diol component on a % by mole basis,

(c) neopentyl glycol in an amount of more than 15% by mole and not more than 40% by mole when a total amount of the whole diol component is taken as 100% by mole, and

(d) diethylene glycol in an amount of from 6 to 20% by mole when a total amount of the whole diol component is taken as 100% by mole,

wherein a content of a cyclic dimer consisting of terephthalic acid, neopentyl glycol, and diethylene glycol is 1000 ppm or more and 5000 ppm or less, and

wherein a content of a cyclic trimer consisting of terephthalic acid and ethylene glycol is 1000 ppm or more and 5000 ppm or less.