US 12,391,794 B2
Polycondensation pre-polyesters, other copolyester precursors, and copolyesters made therefrom
Robert Jacks Sharpe, Madison, AL (US); and Emmett Dudley Crawford, Kingsport, TN (US)
Assigned to Eastman Chemical Company, Kingsport, TN (US)
Appl. No. 17/596,696
Filed by Eastman Chemical Company, Kingsport, TN (US)
PCT Filed Jun. 26, 2020, PCT No. PCT/US2020/039740
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2020/264243, PCT Pub. Date Dec. 30, 2020.
Claims priority of provisional application 62/868,314, filed on Jun. 28, 2019.
Claims priority of provisional application 62/868,299, filed on Jun. 28, 2019.
Prior Publication US 2023/0002308 A1, Jan. 5, 2023
Int. Cl. C08G 63/183 (2006.01); C07C 69/75 (2006.01); C07C 69/82 (2006.01); C07D 307/68 (2006.01); C08G 63/199 (2006.01)
CPC C08G 63/183 (2013.01) [C07C 69/75 (2013.01); C07C 69/82 (2013.01); C07D 307/68 (2013.01); C08G 63/199 (2013.01); C07C 2601/04 (2017.05); C07C 2601/14 (2017.05); C07C 2601/16 (2017.05)] 15 Claims
 
1. A pentamer comprising at least one of the following structures:

OG Complex Work Unit Chemistry
wherein R and R″ comprises residues of at least one diol, wherein said diol is selected from residues of 2,2,4,4-tetramethylcyclobutane-1,3-diol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol hydroxypivalyl hydroxypivalate, isosorbide, 1,4-di-(hydroxyethoxy)-benzene, 2,2-bis-(4-hydroxycyclohexyl)-propane, 2,4-dihydroxy-1,1,3,3-tetramethyl-cyclobutane, 2,2-bis-(3-hydroxyethoxyphenyl)-propane, or 2,2-bis-(4-hydroxypropoxyphenyl)-propane;
wherein R and R″ are not the same; and
wherein R′ comprises residues of at least one diacid or diester.