公开(公告)号：US12006375B2

公开(公告)日：2024-06-11

申请号：US18046228

申请日：2022-10-13

Applicant: Eastman Chemical Company

Inventor： Casey Lynn Elkins ,  Robert Jacks Sharpe ,  Bin Wang

IPC: C08B3/16 ,  C08B3/06 ,  C08B3/08 ,  C08J5/18

CPC classification number: C08B3/16 ,  C08B3/06 ,  C08B3/08 ,  C08J5/18 ,  C08J2301/10 ,  C08J2301/12 ,  C08J2301/14

Abstract: The present application discloses regioselectively substituted cellulose esters, films made from the regioselectively substituted cellulose esters and methods for making the same. The regioselectively substituted cellulose esters are synthesized using trifluoroacetic anhydride and cellulose with various acyl donors or acyl donor precursors.

公开(公告)号：US11851392B2

公开(公告)日：2023-12-26

申请号：US17290901

申请日：2019-10-31

Applicant: EASTMAN CHEMICAL COMPANY

Inventor： Robert Jacks Sharpe ,  Scott Donald Barnicki ,  Manik Lal Saha ,  Kenneth Wayne Hampton, Jr. ,  Damon Ray Billodeaux ,  Robert Thomas Hembre

IPC: C07C45/45 ,  C07C29/15 ,  B01J31/04

CPC classification number: C07C29/15 ,  B01J31/04 ,  C07C45/45

Abstract: An efficient process useful for the self-condensation of aliphatic aldehydes is provided, catalyzed by dialkylammonium carboxylate salts. In particular, the invention provides a facile method for the preparation of 2-ethyl hexenal via the self-condensation of butyraldehyde using various dialkylammonium carboxylates, e.g., diisopropylammonium acetate or dimethylammonium acetate, as catalyst. Additionally, residual nitrogen arising from the catalyst can be reduced to −100 ppm levels in the product via a simple washing procedure. The invention provides a process for preparing alkenals under conditions which limit the formation of undesired impurities and high-boiling oligomeric substances.

公开(公告)号：US11136414B2

公开(公告)日：2021-10-05

申请号：US16492964

申请日：2018-03-28

Applicant: Eastman Chemical Company

Inventor： Casey Lynn Elkins ,  Robert Lin ,  Michael John Rodig ,  Robert Jacks Sharpe

IPC: C08B3/16 ,  C08B3/06 ,  C08B3/08 ,  C08J5/18

Abstract: The present application discloses regioselectively substituted cellulose esters, films made from the regioselectively substituted cellulose esters and methods for making the same. The regioselectively substituted cellulose esters are synthesized using trifluoroacetic anhydride and cellulose with various acyl donors or acyl donor precursors.

公开(公告)号：US12252603B2

公开(公告)日：2025-03-18

申请号：US17760458

申请日：2021-02-10

Applicant: Eastman Chemical Company

Inventor： Qianqian Zhang ,  Bin Wang ,  Robert Jacks Sharpe ,  Wesley Wayne McConnell ,  Casey Lynn Elkins ,  Charles Michael Buchanan

IPC: C08L1/32 ,  C08J5/18 ,  C08K5/07 ,  C08K5/3492 ,  G02B5/30

Abstract: The present application discloses films comprising regioselectively substituted cellulose esters and a component A wherein rings A, B, C, R1, R2, R5, R6, R8, m, n, and k are defined herein. The films are C+ films that exhibit improved wavelength dispersion. <

公开(公告)号：US12215186B2

公开(公告)日：2025-02-04

申请号：US17596690

申请日：2020-06-26

Applicant: Eastman Chemical Company

Inventor： Robert Jacks Sharpe ,  Emmett Dudley Crawford

IPC: C08G63/183 ,  C07C69/75 ,  C07C69/82 ,  C07D307/68 ,  C08G63/199

Abstract: A process for making a polycondensation pre-polyester, a polyester or both, comprising the following steps: following steps: A. Acylation of at least one diacid chloride with at least one alcohol to form at least one diester; B. Partial hydrolysis of the diester product of Step A to form at least one monoacid; C. Esterifying the monoacid of Step B with at least one diol to form a diester; D. Reacting the diester of Step C under acidic conditions to form a diacid; and subsequently, performing either Step E or Step F as follows: E. Bisalkylation of the diacid of Step D with at least one haloalcohol to form a pentamer, or F. Esterifiying the diacid of Step D under esterification conditions with at least one diol to form a pentamer, provided that the diol is not the same as the diol used in Step C.

公开(公告)号：US20230113238A1

公开(公告)日：2023-04-13

申请号：US18046228

申请日：2022-10-13

Applicant: Eastman Chemical Company

Inventor： Casey Lynn Elkins ,  Robert Jacks Sharpe ,  Bin Wang

IPC: C08B3/16 ,  C08B3/06 ,  C08B3/08 ,  C08J5/18

Abstract: The present application discloses regioselectively substituted cellulose esters, films made from the regioselectively substituted cellulose esters and methods for making the same. The regioselectively substituted cellulose esters are synthesized using trifluoroacetic anhydride and cellulose with various acyl donors or acyl donor precursors.

公开(公告)号：US20240010661A1

公开(公告)日：2024-01-11

申请号：US17755474

申请日：2019-11-06

Applicant: Eastman Chemical Company

Inventor： Robert Jacks Sharpe

IPC: C07F7/18

CPC classification number: C07F7/1804

Abstract: Provided is a process for preparing bicyclo[2.2.2]octane-1,4-diol starting from cyclohexane-1,4-dione. The diene is reacted with certain trialkylsilyl halides or trimethylsilyl trifluormethanesulfonate in the presence of a non-nucleophilic base to afford a silyl-substituted diene, which is in turn reacted with ethylene and subsequently reduced to provide the title compound.

公开(公告)号：US20230167201A1

公开(公告)日：2023-06-01

申请号：US18160009

申请日：2023-01-26

Applicant: Eastman Chemical Company

Inventor： Casey Lynn Elkins ,  Robert Jacks Sharpe ,  Bin Wang

IPC: C08B3/16 ,  C08B3/06 ,  C08B3/08 ,  C08J5/18

CPC classification number: C08B3/16 ,  C08B3/06 ,  C08B3/08 ,  C08J5/18 ,  C08J2301/10 ,  C08J2301/12 ,  C08J2301/14

Abstract: The present application discloses regioselectively substituted cellulose esters, films made from the regioselectively substituted cellulose esters and methods for making the same. The regioselectively substituted cellulose esters are synthesized using trifluoroacetic anhydride and cellulose with various acyl donors or acyl donor precursors.

公开(公告)号：US20230074167A1

公开(公告)日：2023-03-09

申请号：US17760452

申请日：2021-02-10

Applicant: Eastman Chemical Company

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

IPC: C08J5/18 ,  C08B3/16

Abstract: 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：US20230014630A1

公开(公告)日：2023-01-19

申请号：US17757389

申请日：2020-12-16

Applicant: Eastman Chemical Company

Inventor： Robert Lin ,  Robert Jacks Sharpe

IPC: C07D319/06 ,  C07C67/02

Abstract: Disclosed is a method for depolymerization of polyester. The method includes (a) treating said polyester with methanol under conditions sufficient to depolymerize at least some of said polyester and form a reaction product that includes dimethyl terephthalate and at least one diol; and (b) converting the diol to a compound substantially non-reactive with said with dimethyl terephthalate and the polyester. A method for producing a cyclic carbonate is also described.