US 12,030,987 B2
Aliphatic polycarbonate
Kiyoshi Nishioka, Himeji (JP); Yusuke Ueba, Nagaokakyo (JP); and Akemi Kirihata, Nagaokakyo (JP)
Assigned to SUMITOMO SEIKA CHEMICALS CO., LTD., Hyogo (JP); and MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Appl. No. 17/425,474
Filed by SUMITOMO SEIKA CHEMICALS CO., LTD., Hyogo (JP); and MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
PCT Filed Jan. 21, 2020, PCT No. PCT/JP2020/001854
§ 371(c)(1), (2) Date Jul. 23, 2021,
PCT Pub. No. WO2020/153329, PCT Pub. Date Jul. 30, 2020.
Claims priority of application No. 2019-010018 (JP), filed on Jan. 24, 2019.
Prior Publication US 2022/0098364 A1, Mar. 31, 2022
Int. Cl. C08G 64/02 (2006.01); C08G 64/40 (2006.01); C09D 11/102 (2014.01); C09D 169/00 (2006.01); C09J 169/00 (2006.01)
CPC C08G 64/0216 (2013.01) [C08G 64/40 (2013.01); C09D 11/102 (2013.01); C09D 169/00 (2013.01); C09J 169/00 (2013.01)] 16 Claims
 
1. An aliphatic polycarbonate comprising a constituent unit represented by formula (1):

OG Complex Work Unit Chemistry
wherein R1, R2, and R3 are identical or different, and each represents a hydrogen atom, a C1-10 alkyl group optionally substituted with one or more substituents, or a C6-20 aryl group optionally substituted with one or more substituents, wherein two groups from among R1 to R3, taken together with the carbon atom or carbon atoms to which these groups are attached, may form a substituted or unsubstituted, saturated or unsaturated 3- to 10-membered aliphatic ring; and X represents a divalent group containing one or more heteroatoms or an alkylene group having 3 or more carbon atoms, and
a constituent unit represented by formula (2):

OG Complex Work Unit Chemistry
wherein R4, R5, R6, and R7 are identical or different, and each represents a hydrogen atom, a C1-10 alkyl group optionally substituted with one or more substituents, or a C6-20 aryl group optionally substituted with one or more substituents, wherein two groups from among R4 to R7, taken together with the carbon atom or carbon atoms to which these groups are attached, may form a substituted or unsubstituted, saturated or unsaturated 3- to 10-membered aliphatic ring,
the content of the constituent unit represented by formula (1) being 0.1 mol % or more and 1.5 mol % or less, based on the total amount of the constituent units of formula (1) and formula (2).