US 12,454,597 B2
Polyester resin
Yoko Tamura, Tokyo (JP); Tadahiro Ozawa, Tokyo (JP); Yoshihiro Kamon, Tokyo (JP); and Takafumi Asai, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Sep. 10, 2020, as Appl. No. 17/016,712.
Application 17/016,712 is a continuation of application No. PCT/JP2019/008329, filed on Mar. 4, 2019.
Claims priority of application No. 2018-046937 (JP), filed on Mar. 14, 2018.
Prior Publication US 2020/0407493 A1, Dec. 31, 2020
Int. Cl. C08G 63/42 (2006.01); C08G 63/183 (2006.01); C08L 67/02 (2006.01); C09D 11/104 (2014.01)
CPC C08G 63/42 (2013.01) [C08G 63/183 (2013.01); C08L 67/025 (2013.01); C09D 11/104 (2013.01); C08G 2230/00 (2013.01)] 19 Claims
 
1. A polyester resin, comprising:
at least one structural unit (A) represented by General Formula (1):

OG Complex Work Unit Chemistry
at least one structural unit (B) selected from the group consisting of neopentyl glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, diethylene glycol, triethylene glycol, and 1,4-cyclohexanedimethanol; and
at least one structural unit (C) selected from the group consisting of structural unit (c1) derived from a trivalent or higher-valent acid component and structural unit (c2) derived from a trihydric or higher-hydric alcohol component,
wherein the polyester resin includes the structural unit (B) in an amount of 20 molar parts or more with respect to 100 molar parts of all the structural units derived from acid components, wherein the acid components are carboxylic acid components,
every structural unit in the polyester resin that is derived from an acid is derived from a carboxylic acid, and
every structural unit in the polyester resin that is a diol consists of a structural unit (A), a structural unit (B), or an ethylene glycol unit.