Karin H Hudson

US Patent:

20070010646, Jan 11, 2007

Filed:

Jul 11, 2005

Appl. No.:

11/178905

Inventors:

Bobby Dawkins - Charlotte NC, US
J. Baker - Rock Hill SC, US
Rita Joiner - Rock Hill SC, US
Karin Hudson - Charlotte NC, US

International Classification:

C08G 63/06

US Classification:

528207000

Abstract:

A process is presented for the production of high molecular weight polybenzimidazole, in two steps. Step one: provide a first reaction vessel and charge it with at least one aromatic hydrocarbon tetraamine, and a heterocyclic ring making up the dicarboxylic component. Heat the reactants under agitation. Terminate the agitation while continuing to heat the reaction mixture to about 230 C. while allowing the reaction mass to foam. Cool the reaction mass to a friable foamed mass. Crush the friable foamed mass to obtain a ground prepolymer. Step two; provide a second reaction vessel, transferring the ground prepolymer to it. A pressure wash of the first reaction vessel and the means for agitation to obtain a second ground prepolymer. Transfer the second ground prepolymer to the second reaction vessel. Heat the ground prepolymer and second ground prepolymer under agitation to a higher temperature than the first step until the desired degree of polymerization is achieved.

US Patent:

20110189484, Aug 4, 2011

Filed:

Jan 27, 2011

Appl. No.:

13/014976

Inventors:

Karin M. Hudson - Charlotte NC, US
Gregory S. Copeland - Tega Cay SC, US
Michael Gruender - Charlotte NC, US

International Classification:

C08G 73/18
C08J 9/00
C08K 5/41
C08K 5/20
C08K 5/3432
C08K 5/3415
B32B 5/00

US Classification:

428402, 521 50, 521 89, 521 90, 521 94, 521 88, 521 82

Abstract:

A porous polybenzimidazole (PBI) particulate resin is disclosed. This resin is easily dissolved at ambient temperatures and pressures. The resin is made by: dissolving a virgin PBI resin in a highly polar solvent; precipitating the dissolved PBI in a bath; and drying the precipitated PBI, the dried precipitated PBI being porous. The porous PBI resin may be dissolved by: mixing a porous PBI resin with a highly polar solvent at ambient temperatures and pressures to form a solution.

US Patent:

20130331470, Dec 12, 2013

Filed:

Jul 3, 2013

Appl. No.:

13/934265

Inventors:

Karin M. Hudson - Charlotte NC, US
Gregory S. Copeland - Tega Cay SC, US
Michael Gruender - Charlotte NC, US

Assignee:

PBI Performance Products Inc. - Charlotte NC

International Classification:

C08J 9/00

US Classification:

521 50

Abstract:

A porous polybenzimidazole (PBI) particulate resin is disclosed. This resin is easily dissolved at ambient temperatures and pressures. The resin is made by: dissolving a virgin PBI resin in a highly polar solvent; precipitating the dissolved PBI in a bath; and drying the precipitated PBI, the dried precipitated PBI being porous. The porous PBI resin may be dissolved by: mixing a porous PBI resin with a highly polar solvent at ambient temperatures and pressures to form a solution.

US Patent:

20180044493, Feb 15, 2018

Filed:

Oct 24, 2017

Appl. No.:

15/791864

Inventors:

- Charlotte NC, US
Karin M. Hudson - Charlotte NC, US
Gregory S. Copeland - Tega Cay SC, US
Michael Gruender - Charlotte NC, US

International Classification:

C08J 9/00
C08J 3/11
C08J 9/28
C08J 3/09

Abstract:

A porous polybenzimidazole (PBI) particulate resin is disclosed. This resin is easily dissolved at ambient temperatures and pressures. The resin is made by: dissolving a virgin PBI resin in a highly polar solvent; precipitating the dissolved PBI in a bath; and drying the precipitated PBI, the dried precipitated PBI being porous. The porous PBI resin may be dissolved by: mixing a porous PBI resin with a highly polar solvent at ambient temperatures and pressures to form a solution.