公开(公告)号：US20230074167A1

公开(公告)日：2023-03-09

申请号：US17760452

申请日：2021-02-10

申请人： Eastman Chemical Company

发明人： Qianqian Zhang ,  Charles Michael Buchanan ,  Casey Lynn Elkins ,  Wesley Wayne McConnell ,  Bin Wang ,  Robert Jacks Sharpe ,  Mustafa Humbel Ahmed

IPC分类号： C08J5/18 ,  C08B3/16

摘要： The present application discloses stretched films comprising regioselectively substituted cellulose esters and a component A: (I), (II), (III), or (IV), wherein A, B, C, R1, R2, R5, R6, R8, R9, m, n, and k are defined herein. The films exhibit negative birefringence and improved wavelength dispersion.

公开(公告)号：US20220289947A1

公开(公告)日：2022-09-15

申请号：US17753179

申请日：2020-08-11

申请人： Eastman Chemical Company

发明人： Wesley Wayne McConnell ,  Mustafa Humbel Ahmed ,  Bin Wang

IPC分类号： C08L1/14 ,  C08B3/16

摘要： The present application discloses regioselectively substituted cellulose esters comprising 2-ethylhexanoyl substituents that have desirable mechanical properties that allow the cellulose esters to be stretched into larger and thinner films while still maintaining their optical properties.