Gregory J Yoder

US Patent:

6984708, Jan 10, 2006

Filed:

Oct 4, 2002

Appl. No.:

10/264742

Inventors:

Hong Liu - Waynesboro VA, US
Gregory L. Yoder - Charlottesville VA, US

Assignee:

Invista North America S.a.r.l. - Wilmington DE

International Classification:

C08G 18/65

US Classification:

528 62, 528 76, 528906

Abstract:

The invention provides spandex having improved hysteresis and a method for making such spandex. The spandex of the invention comprises the polyurethaneurea reaction product of:.

US Patent:

20050288477, Dec 29, 2005

Filed:

Aug 31, 2005

Appl. No.:

11/216733

Inventors:

Hong Liu - Waynesboro VA, US
Gregory Yoder - Charlottesville VA, US
Robert Waldbauer - Waynesboro VA, US

International Classification:

C08G018/00

US Classification:

528044000

Abstract:

The invention provides spandex having improved hysteresis and a method for making such spandex. The spandex of the invention comprises the polyurethaneurea reaction product of: (a) poly(tetramethylene ether) glycol (b) 1-isocyanato-4-[(4-isocyanatophenyl)methyl]benzene wherein the mole ratio of diisocyanate to glycol is from about 1.52 to about 2.04; and (c) a mixture of chain extenders comprising: from about 35 to about 55 mole percent ethylene diamine; and from about 45 to about 65 mole percent 1,2-propanediamine.

US Patent:

20110201734, Aug 18, 2011

Filed:

Oct 14, 2009

Appl. No.:

13/124439

Inventors:

Hong Liu - Waynesboro VA, US
Gregory L. Yoder - Charlottesville VA, US
Jin Li - Charlottesville VA, US

Assignee:

Invista North America S.a.r.l. - Wilmington DE

International Classification:

C08K 5/29
C08L 75/12

US Classification:

524196

Abstract:

Included are polyurethaneurea compositions include polyurethaneurea aqueous dispersions. The dispersions may be prepared with solvent or in the absence of any added solvent. Films and other shaped articles may be prepared from the dispersions by a casting a drying method and optionally included with a substrate including paper, fabric or garments. The films exhibit a reduced discoloring or yellowing upon exposure to atmosphere, heat, and UV.

US Patent:

20210087388, Mar 25, 2021

Filed:

Dec 12, 2018

Appl. No.:

16/772456

Inventors:

- Wilmington DE, US
Hong LIU - Waynesboro VA, US
Gregory L. YODER - Charlottesville VA, US
Nicholas E. KURLAND - Staunton VA, US
Oguzhan CELEBI - Waynesboro VA, US

Assignee:

The LYCRA Company LLC - Wilmington DE

International Classification:

C08L 75/04
C08G 18/48
C08G 18/12
C08G 18/76
C08G 18/32

Abstract:

Polymer compositions and processes for extended glycols and under-capping glycols for production of polymer compositions with engineered hard and soft segment molecular weights are provided. Also provided are fibers and articles of manufacture such as fabrics and garments produced from these polymer compositions and processes.