US 12,012,479 B2
Polyurethane resin having satisfactory adhesive property, and adhesive composition using the same
Hiroki Okajima, Shiga (JP); and Katsuya Shimeno, Shiga (JP)
Assigned to TOYOBO MC CORPORATION, Osaka (JP)
Appl. No. 17/284,922
Filed by TOYOBO CO., LTD., Osaka (JP)
PCT Filed Nov. 13, 2019, PCT No. PCT/JP2019/044492
§ 371(c)(1), (2) Date Apr. 13, 2021,
PCT Pub. No. WO2020/116109, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 2018-226680 (JP), filed on Dec. 3, 2018.
Prior Publication US 2021/0380754 A1, Dec. 9, 2021
Int. Cl. C08G 18/76 (2006.01); C08G 18/44 (2006.01); C08G 18/73 (2006.01); C08G 18/75 (2006.01); C09J 175/04 (2006.01)
CPC C08G 18/7657 (2013.01) [C08G 18/44 (2013.01); C08G 18/73 (2013.01); C08G 18/753 (2013.01); C09J 175/04 (2013.01)] 6 Claims
 
1. A polyurethane resin containing, as copolymerization components, a polycarbonate polyol (A), an organic diisocyanate (B) and a chain extender (C),
wherein the polycarbonate polyol (A) contains a structure represented by the following general formula (1) in an amount of 60 mol % or more,
wherein a copolymerization content of the organic diisocyanate (B) is 1 part by mass or more and 50 parts by mass or less, relative to 100 parts by mass of the polycarbonate polyol (A),
wherein the chain extender (C) is a polyol compound, and
wherein a glass transition temperature of the polyurethane resin is 50° C. or higher,

OG Complex Work Unit Chemistry
wherein in general formula (1), n represents an integer of 1 to 20.