公开(公告)号：US11046864B2

公开(公告)日：2021-06-29

申请号：US14902609

申请日：2013-07-05

申请人： DAIWA CAN COMPANY ,  Bell Polyester Products, Inc.

发明人： Takashi Kimiduka ,  Yuji Takeuchi ,  Junji Matsumura ,  Masaya Okimoto ,  Keita Katsuma ,  Hideaki Tomura ,  Sadamu Nakatsuka

IPC分类号： C08G63/183 ,  C09D167/02 ,  B65D1/12 ,  B65D25/14 ,  B65D25/34 ,  B32B27/36 ,  B32B15/09 ,  C08G63/199 ,  C09D167/08 ,  C08G63/78

摘要： The problem to be solved by the present invention is to provide a polyester resin excellent in various properties wherein the film formability is good, film fracture (hairs) and scraping (galling) are not easily generated in the drawing/ironing process when applied to a metal-sheet-coating polyester film, the film surface is not damaged when used as the inner-surface film for a metallic can, and the metallic can is hardly corroded (dent resistance), by dropping or external impact (denting), after a product is made by enclosing contents into the can.
The copolyester resin of the present invention is characterized by comprising, as the constituent units, 50 to 93 mass % of (A) ester oligomer with the number-average molecular weight of 700 or lower and consisting of a dicarboxylic acid unit (a1) containing 70 mole % or more of the terephthalic acid component and a diol unit (a2) containing 70 mole % or more of the ethylene glycol component; and 7 to 50 mass % of (B) polyester polyol with the number-average molecular weight of 1500 to 3000 and consisting of a hydrogenated dimer acid unit (b1) and a 1,4-butanediol unit (b2).

公开(公告)号：US10662285B2

公开(公告)日：2020-05-26

申请号：US16074949

申请日：2016-02-03

申请人： DAIWA CAN COMPANY ,  Bell Polyester Products, Inc.

发明人： Masaya Okimoto ,  Keita Katsuma ,  Hideaki Tomura

IPC分类号： C08G63/199 ,  C08G63/685 ,  C08L67/02 ,  C08G63/553

摘要： The present invention provides a polyester resin composition excellent in transparency and flexibility, high in heat resistance, undergoes the bleeding-out of an oligomer at a reduced level, and can be formed into a formed or molded article or pellets that are rarely agglutinated. A polyester resin composition includes a polyester resin, made by a polymerization reaction of a dicarboxylic acid component containing (a) 75 to 98 mol% of an alicyclic dicarboxylic acid, preferably having 5 to 30 carbon atoms, and (b) 2 to 25 mol% of a dimer acid, preferably having 36 or 44 carbon atoms, with (c) a diol component containing 75 mol% or more of an alicyclic diol. The proportion of the trans-form relative to the total amount of the trans-form and the cis-form of the alicyclic dicarboxylic acid unit contained in the polyester resin composition is desirably 80% or more.