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

Claim 0:
1. 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-CO”) 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-CO”) 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-CO”) 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-CO”) 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 (C6-20)aryl, wherein the aryl is unsubstituted or substituted by 1 to 6 R2 groups, and
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 (C1-20)alkyl.