Patent ID: 11939407
Assignee: EASTMAN CHEMICAL COMPANY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 9:
10. A regioselectively substituted cellulose ester comprising:
(i) a plurality of R1—CO— substituents;
(ii) a plurality of R4—CO— substituents;
(iii) a plurality of hydroxyl substituents,
wherein the degree of substitution of R1—CO— at the C2 position (“C2DSR1”) is in the range of from about 0.2 to about 1.0,
wherein the degree of substitution of R1—CO— at the C3 position (“C3DSR1”) is in the range of from about 0.2 to about 1.0,
wherein the degree of substitution of R1—CO— at the C6 position (“C6DSR1”) is in the range of from about 0 to about 0.5,
wherein the degree of substitution of R4—CO— at the C6 position (“C6DSR4”) is in the range of from about 0.1 to about 1.0,
wherein the degree of substitution of hydroxyl is in the range of from about 0 to about 2.6,
wherein R1 is propionyl and an (C6-20)aryl, wherein the aryl is unsubstituted or substituted by 1 to 6 R2 groups,
wherein R2 is chosen from (C1-6)alkyl, halo(C1-6)alkyl, (C1-6)alkoxy, halo(C1-6)alkoxy, halo, (C3-7)cycloalkyl, (C6-10)aryl, or nitro,
wherein R4 is chosen from (C1-20)alkyl; halo(C1-5)alkyl; (C2-20)alkenyl, (C3-7)cycloalkyl, (C6-20)aryl, wherein the aryl is unsubstituted or substituted by 1 to 6 R5 groups; or monocyclic or bicyclic heteroaryl containing 1 to 3 heteroatoms independently selected from oxygen, sulfur, and nitrogen, wherein the heteroaryl is unsubstituted or substituted by 1 to 6 R6 groups,
R5 is chosen from (C1-6)alkyl, halo(C1-6)alkyl, (C1-6)alkoxy, halo(C1-6)alkoxy, halo, (C3-7)cycloalkyl, (C6-10)aryl, or nitro, and
R6 is chosen from (C1-6)alkyl, halo(C1-6)alkyl, (C1-6)alkoxy, halo(C1-6)alkoxy, halo, (C3-7)cycloalkyl, (C6-10)aryl, or nitro.