US 12,006,376 B2
Regioselectively substituted cellulose esters and films made therefrom
Matthew Allen Boone, Kingsport, TN (US); Christopher Harlan Burk, Gray, TN (US); Peter Borden Mackenzie, Vancouver (CA); Jennifer A. Fish, Mount Joy, PA (US); Eduardo Gallas Cervo, Kingsport, TN (US); Elaine Beatrice Mackenzie, Vancouver (CA); Robert Joseph Maleski, Kingsport, TN (US); Wesley Wayne McConnell, Kingsport, TN (US); David William Norman, Kingsport, TN (US); Tabatha Stearns, Kingsport, TN (US); and Bin Wang, Kingsport, TN (US)
Assigned to Eastman Chemical Company, Kingsport, TN (US)
Filed by Eastman Chemical Company, Kingsport, TN (US)
Filed on Mar. 27, 2023, as Appl. No. 18/190,415.
Application 18/190,415 is a continuation of application No. 17/302,463, filed on May 4, 2021, granted, now 11,643,477.
Application 17/302,463 is a continuation of application No. 16/831,904, filed on Mar. 27, 2020, granted, now 11,034,776, issued on Jun. 15, 2021.
Application 16/831,904 is a continuation of application No. 15/482,920, filed on Apr. 10, 2017, granted, now 10,640,577, issued on May 5, 2020.
Claims priority of provisional application 62/472,046, filed on Mar. 16, 2017.
Claims priority of provisional application 62/466,097, filed on Mar. 2, 2017.
Claims priority of provisional application 62/326,037, filed on Apr. 22, 2016.
Prior Publication US 2023/0235093 A1, Jul. 27, 2023
Int. Cl. C08B 3/16 (2006.01); B32B 7/12 (2006.01); B32B 23/08 (2006.01); B32B 27/06 (2006.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/22 (2006.01); B32B 27/24 (2006.01); B32B 27/28 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); C08L 1/14 (2006.01); G02B 5/30 (2006.01); G02F 1/13363 (2006.01); H10K 50/84 (2023.01); H10K 50/86 (2023.01); C08L 1/08 (2006.01); C08L 1/10 (2006.01)
CPC C08B 3/16 (2013.01) [B32B 7/12 (2013.01); B32B 23/08 (2013.01); B32B 27/06 (2013.01); B32B 27/08 (2013.01); B32B 27/18 (2013.01); B32B 27/22 (2013.01); B32B 27/24 (2013.01); B32B 27/281 (2013.01); B32B 27/325 (2013.01); B32B 27/36 (2013.01); B32B 27/365 (2013.01); C08L 1/14 (2013.01); G02B 5/3033 (2013.01); G02B 5/305 (2013.01); G02B 5/3083 (2013.01); G02F 1/13363 (2013.01); H10K 50/846 (2023.02); H10K 50/86 (2023.02); B32B 2307/40 (2013.01); B32B 2307/516 (2013.01); B32B 2307/518 (2013.01); B32B 2307/546 (2013.01); B32B 2307/732 (2013.01); B32B 2309/105 (2013.01); B32B 2457/202 (2013.01); B32B 2457/206 (2013.01); C08L 1/08 (2013.01); C08L 1/10 (2013.01); C09K 2323/03 (2020.08); C09K 2323/035 (2020.08); G02F 1/133638 (2021.01); G02F 2413/13 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A regioselectively substituted cellulose ester comprising:
(a) a plurality of chromophore-acyl substituents; and
(b) a plurality of pivaloyl substituents,
(c) a plurality of (C1-6)alkyl-acyl substituents,
wherein the cellulose ester has a hydroxyl degree of substitution (“DSOH”) in the range of from 0 to 0.9,
wherein the cellulose ester has a pivaloyl degree of substitution (“DSPv”) in the range of from 0.1 to 1.2,
wherein the cellulose ester has a chromophore-acyl degree of substitution (“DSCh”) in the range of from 0.4 to 1.6, and
wherein the regioselectivity is such that the sum of the chromophore-acyl degree of substitution at C2 and C3 (“C2DSCh” and “C3DSCh”) minus the chromophore-acyl degree of substitution at C6 (“C6DSCh”) is between 0.1 and 1.6,
wherein the chromophore-acyl is chosen from a heteroaryl-acyl, wherein the heteroaryl is a 5- to 10-membered ring having 1- to 4- heteroatoms chosen from N, O, or S, and wherein the heteroaryl is unsubstituted or substituted by 1-5 R1;
wherein each R1 is independently chosen from nitro, cyano, (C1-6)alkyl; halo(C1-6)alkyl; (C6-20)aryl-CO2-; (C6-20)aryl; (C1-6)alkoxy; halo(C1-6)alkoxy; halo; 5- to 10-membered heteroaryl having 1-4 heteroatoms chosen from N, O, or S; or

OG Complex Work Unit Chemistry