Theodore R Walker

US Patent:

62554379, Jul 3, 2001

Filed:

Dec 8, 1999

Appl. No.:

9/453975

Inventors:

Theodore Roseuelt Walker - Kingsport TN
William Ronald Darnell - Weber city VA
Jean Carroll Fleischer - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C08G 6400

US Classification:

528196

Abstract:

This invention relates to a polycarbonate represented by the formula (I): ##STR1## wherein R. sub. 1 is H, alkyl, aryl, ##STR2## R. sub. 2 is alkyl, aryl, or alkoxy, R. sub. 3 and R. sub. 4 are alkyl or aryl having 1 to 20 carbons, and n is from 100 to 100,000.

US Patent:

52929477, Mar 8, 1994

Filed:

Sep 28, 1992

Appl. No.:

7/952228

Inventors:

Theodore R. Walker - Kingsport TN

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07C30322
C07C30300
C07C 4500

US Classification:

562872

Abstract:

This invention relates to a process for preparing an alkylsulfonic anhydride comprising contacting (A) a dehydrated phosphoric acid with (B) an alkylsulfonic acid having 1 to 6 carbon atoms, under conditions of temperature and pressure to result in the substituted absence of phosphoric/alkylsulfonic mixed anhydride and production of a mixture of alkylsulfonic acid and its corresponding anhydride at a conversion of at least 10% of alkylsulfonic acid to the corresponding alkylsulfonic anhydride.

US Patent:

53388810, Aug 16, 1994

Filed:

Jul 23, 1990

Appl. No.:

7/556677

Inventors:

Theodore R. Walker - Kingsport TN
Winston J. Jackson - Kingsport TN
Jean C. Fleischer - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C07C 5976

US Classification:

562462

Abstract:

This invention concerns a process for preparing diketones and keto-acids by reacting a dicarboxylic acid and an aromatic compound in the presence of an alkylsulfonic acid such as methanesulfonic acid and a phosphorus pentoxide. The diketones and keto-acids can be used to prepare polyketones which are useful as molding plastics, coatings, films, fibers, and the like.

US Patent:

61213691, Sep 19, 2000

Filed:

Mar 31, 1998

Appl. No.:

9/052639

Inventors:

Gary Michael Stack - Kingsport TN
Theodore Roosevelt Walker - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C08K 300

US Classification:

524495

Abstract:

Disclosed are liquid crystalline polyester molding compositions which are capable of being molded into an article having a thickness of less than 1. 5 mm and a flammability classification of 94V-O as determined by the UL-94 20 mm Vertical Burning Test (ASTM D 3801) which are comprised of (i) certain all-aromatic, liquid crystal polyester consisting essentially of terephthalic acid residues, 2,6-naphthalenedicarboxylic acid residues, hydroquinone residues, and p-hydroxybenzoic acid residues; and (ii) about 0. 1 to 10 weight percent, based on the total weight of the liquid crystalline polyester molding composition, carbon black. These liquid crystalline polyester molding compositions also may contain glass fiber. The disclosed molding compositions are particularly useful for manufacturing circuit boards and electrical connectors for use in various electronic devices.

US Patent:

61144746, Sep 5, 2000

Filed:

Dec 23, 1997

Appl. No.:

8/997656

Inventors:

Theodore R. Walker - Kingsport TN
William R. Darnell - Weber City VA
Jean C. Fleischer - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C08G 6400

US Classification:

525439

Abstract:

The invention relates to a process of deactivating a polycarbonate, by mixing a polycarbonate containing an active alkali metal catalyst residue with a carboxylic acid, but not removing the deactivated catalyst. The invention further relates to a process of deactivating a polycarbonate, by mixing a solid state polycarbonate containing an active alkali metal catalyst and a carboxylic acid, followed by heating the mixture of step at a temperature to melt the mixture and deactivate the alkali metal catalyst, wherein the deactivated catalyst is not removed. The invention further relates to a process of making a polycarbonate, by polymerizing a polycarbonate in the presence of an alkali metal catalyst to produce an activated polycarbonate, and mixing the activated polycarbonate with a carboxylic acid to deactivate the alkali metal catalyst and form a polycarbonate, wherein the deactivated alkali metal catalyst is not removed from the polycarbonate. The invention further relates to products made by the processes described above. The invention further relates to polycarbonates containing an alkali metal carboxylate therein.

US Patent:

49594460, Sep 25, 1990

Filed:

May 26, 1989

Appl. No.:

7/357459

Inventors:

Burns Davis - late of Kingsport TN
Theodore R. Walker - Kingsport TN

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C08G 6926

US Classification:

528185

Abstract:

Polyamide resins useful for forming containers having improved resistance to gas permeability comprising the reaction product of (A) a dicarboxylic acid corresponding to the structure ##STR1## wherein X is hydrogen or unsubstituted alkyl containing 1-5 carbons and n is an integer in the range of 4 to 10, and (B) a diamine containing 5 to 16 carbon atoms.

US Patent:

51070294, Apr 21, 1992

Filed:

Jul 23, 1990

Appl. No.:

7/556678

Inventors:

Theodore R. Walker - Kingsport TN
Winston J. Jackson - Kingsport TN
Jean C. Fleischer - Kingsport TN

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07C 4546

US Classification:

568319

Abstract:

This invention concerns a process for preparing diketones and keto-acids by reacting a dicarboxylic acid and an aromatic compound in the presence of an alkylsulfonic acid such as methanesulfonic acid and an organic anhydride compound such as methanesulfonic anhydride or trifluoroacetic anhydride. The diketones and keto-acids can be used to prepare polyketones which are useful as molding plastics, coatings, films, fibers, and the like.

US Patent:

61807486, Jan 30, 2001

Filed:

Dec 23, 1997

Appl. No.:

8/996661

Inventors:

William R. Darnell - Weber City VA
Theodore R. Walker - Kingsport TN
Jean C. Fleischer - Kingsport TN

Assignee:

Eastman Chemical Company - Kingsport TN

International Classification:

C08G 6400

US Classification:

528196

Abstract:

The invention relates to a process of deactivating a polycarbonate, by mixing a polycarbonate having an active alkali metal catalyst residue therein with a deactivator represented of a formula of: ##STR1## wherein, R. sub. 1 -R. sub. 7 and R. sub. 9 are, independently, hydrogen; aliphatic hydrocarbon of from 1 to 20 carbon atoms; substituted aromatic hydrocarbon of from 6 to 20 carbon atoms; or unsubstituted aromatic hydrocarbon of from 6 to 20 carbon atoms; R. sub. 8 and R. sub. 10 -R. sub. 13 are, independently, substituted or unsubstituted aromatic hydrocarbon of from 6 to 20 carbon atoms; or aliphatic hydrocarbon of from 1 to 20 carbon atoms; A is a tetrafunctional hydrocarbon group; and x is an integer of from 1 to 3, at a temperature and time sufficient to deactivate the alkali metal catalyst to form a deactivated polycarbonate, wherein the deactivated catalyst is not removed from the deactivated polycarbonate. The invention also relates to a polycarbonate having a deactivated metal catalyst.