Richard Hayes

US Patent:

53190700, Jun 7, 1994

Filed:

Jun 4, 1993

Appl. No.:

8/071082

Inventors:

Richard A. Hayes - Houston TX

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08F 608

US Classification:

528482

Abstract:

Metallic, ash-producing residues which remain in poly(vinyl alcohol) polymer after its preparation by hydrolysis of poly(vinyl acetate) are removed by a process which involves contacting a slurry of the poly(vinyl alcohol) polymer with ion-exchange resin particles, followed by removal of the ion-exchange resin particles from the poly(vinyl alcohol) polymer particles utilizing size or weight differences between them. The poly(vinyl alcohol) polymer remains in the solid state throughout, avoiding dissolution and the need for reprecipitation.

US Patent:

59816350, Nov 9, 1999

Filed:

Nov 16, 1992

Appl. No.:

7/976846

Inventors:

Richard Allen Hayes - Houston TX

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C08K 534

US Classification:

524 99

Abstract:

Incorporation into polyacetal compositions of at least one hindered amine light stabilizer which contains a hindered nitrogen that is acetylated results in a composition having good light stability, thermal stability, and physical property retention after exposure to heat and air.

US Patent:

54258790, Jun 20, 1995

Filed:

Nov 1, 1993

Appl. No.:

8/143762

Inventors:

Richard A. Hayes - Houston TX

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

B01J 3904

US Classification:

210681

Abstract:

Metallic, ash-producing residues which remain in poly(vinyl alcohol) polymer after its preparation from poly(vinyl acetate) are removed by a process which involves contacting a slurry of the poly(vinyl alcohol) polymer, after preparation and before polymer isolation, with ion-exchange resin particles, followed by removal of the ion-exchange resin particles from the poly(vinyl alcohol) polymer particles utilizing size or weight differences between them. The poly(vinyl alcohol) polymer remains in the solid state throughout, avoiding dissolution and the need for re-precipitation.

US Patent:

53625153, Nov 8, 1994

Filed:

Feb 28, 1994

Appl. No.:

8/203136

Inventors:

Richard A. Hayes - Houston TX
George D. Robinson - Matthews NC

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

D06M 15333

US Classification:

427155

Abstract:

An improved process for producing woven textiles, comprising: a) sizing yam to be woven, with an aqueous solution of a poly(vinyl alcohol) copolymer containing from about 7 to 15 weight percent units derived frown a comonomer selected from the group consisting of an alkyl acrylate, an alkyl methacrylate, a dialkyl fmnarate and a dialkyl maleate, wherein the alkyl group contains from 1 to 8 carbon atoms; b) weaving the yam to produce woven textile; c) desizing the resulting woven textile with an aqueous caustic solution having a concentration between 0. 001 and 10 weight percent caustic material in water, and d) optionally washing the caustic desized woven textile with water. The sizes are very readily desizable, even when the woven textile fabrics have been heat treated.

US Patent:

53225490, Jun 21, 1994

Filed:

Jun 4, 1993

Appl. No.:

8/071081

Inventors:

Richard A. Hayes - Houston TX

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B01D 5322
B01D 7164

US Classification:

95 45

Abstract:

A polyimide, and a gas separation membrane prepared therefrom, containing repeating units derived from 5(2,5-dioxo-tetrahydrofuryl)-3-methyl-3,3-cyclohexane-1,2-dicarboxylic anhydride is disclosed.

US Patent:

54056535, Apr 11, 1995

Filed:

Feb 28, 1994

Appl. No.:

8/203070

Inventors:

Richard A. Hayes - Houston TX
George D. Robinson - Matthews NC

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

B05D 304
B05D 310

US Classification:

427341

Abstract:

Compositions based on blends of certain specified poly(vinyl alcohol) copolymers and various starches are described which are useful as sizes, and can have improved ability to be desized from fabrics compared with the starches alone. The specific poly(vinyl alcohol) copolymers useful in the blends with the starches are copolymers having a high level of acrylic ester comonomer. The blend sizes are useful in producing woven materials since they are excellent sizes, and are uniquely adaptable to caustic desizing.

US Patent:

54362938, Jul 25, 1995

Filed:

Feb 28, 1994

Appl. No.:

8/202620

Inventors:

Richard A. Hayes - Houston TX
George D. Robinson - Matthews NC

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C08L 2902
C08L 2904

US Classification:

525 57

Abstract:

Compositions based on blends of certain specified poly(vinyl alcohol) copolymers and other poly(vinyl alcohol) polymers are described which are useful as sizes, and have improved ability to be desized from fabrics compared with the other poly(vinyl alcohol) polymers alone. The specific poly(vinyl alcohol) copolymers useful in the blends with other poly(vinyl alcohol) polymers are copolymers having a high level of acrylic ester comonomer. The blend sizes are useful in producing woven materials since they are excellent sizes, and are uniquely adaptable to caustic desizing.

Address:

4300 Bay Area Blvd APT 515, Houston, TX 77058

VIN:

1D7HA182X7S209858

Make:

DODGE

Model:

RAM 1500

Year:

2007