CPC C08B 3/16 (2013.01) [C08B 3/06 (2013.01); C08B 3/08 (2013.01); C08J 5/18 (2013.01); C08J 2301/10 (2013.01); C08J 2301/12 (2013.01); C08J 2301/14 (2013.01)] | 14 Claims |
1. A film comprising 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 less than 0.1, 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,
wherein R2 is chosen from (C1-6)alkyl, halo(C1-6)alkyl, (C1-6)alkoxy, halo(Ci-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, or (C3-7)cycloalkyl,
wherein the film is a uniaxially, biaxially, or 45 degree stretched film.
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