Edward L Powers

US Patent:

41015258, Jul 18, 1978

Filed:

Oct 26, 1976

Appl. No.:

5/735850

Inventors:

Herbert L. Davis - Convent Station NJ
Michael L. Jaffe - Summit NJ
Herman L. LaNieve - Charlotte NC
Edward J. Powers - Charlotte NC

Assignee:

Celanese Corporation - New York NY

International Classification:

C08G 6318
C08G 6370

US Classification:

528309

Abstract:

An improved high performance polyester (at least 85 mol percent polyethylene terephthalate) multifilament yarn possessing a novel internal structure is provided. The multifilament yarn of the present invention possesses a high strength (at least 7. 5 grams per denier) and an unusually stable internal structure which renders it particularly suited for use in industrial applications at elevated temperatures. As described in detail hereafter the subject multifilamentary material exhibits unusually low shrinkage and hysteresis characteristics (i. e. work loss characteristics) coupled with the high strength characteristics normally associated with polyester industrial yarns. Accordingly, when utilized in the formation of a tire cord and embedded in a rubber matrix, a highly stable tire may be formed which exhibits a significantly lesser heat generation uon flexing.

US Patent:

39429504, Mar 9, 1976

Filed:

Dec 27, 1974

Appl. No.:

5/536807

Inventors:

Edward J. Powers - Gillette NJ
Walter P. Hassinger - Berkeley Heights NJ

Assignee:

Celanese Corporation - New York NY

International Classification:

D06P 504
D06P 168
D06P 340

US Classification:

8173

Abstract:

Heretofore polybenzimidazole fibrous materials have proven to be extremely difficult to dye successfully. The present invention provides an effective route for the achievement of a satisfactorily dyed polybenzimidazole fibrous material. The fibrous material initially is contacted at an elevated temperature with a liquid (e. g. , an aqueous emulsion) comprising an organic swelling agent and salicylic acid to form polybenzimidazonium salicylate, and subsequently is dyed with an anionic dyestuff. Complete and uniform dye penetration is made possible through the use of the present process, and the resulting dyed article is capable of resisting dye sublimation when utilized in an environment where elevated temperatures are encountered.

US Patent:

49279092, May 22, 1990

Filed:

Sep 18, 1987

Appl. No.:

7/098440

Inventors:

Lachhman Wadhwa - North Plainfield NJ
Michel Bitritto - Summit NJ
Edward J. Powers - Charlotte NC

Assignee:

Hoechst Celanese Corp. - Somerville NJ

International Classification:

C08G 7318
B29C 3914
B29C 6722

US Classification:

528331

Abstract:

The instant invention involves a process for producing continuous polybenzimidazole films. The process is comprised of the following steps: (a) preparing a solvent solution of a polybenzimidazole polymer; (b) continuously casting the solution upon a support; (c) evaporating a sufficient amount of the solvent to form a self-supporting film in an oven; (d) washing the film in a nonsolvent; (e) removing the film from the support; and (f) continuously collecting the continuous film.

US Patent:

41950526, Mar 25, 1980

Filed:

Oct 26, 1976

Appl. No.:

5/735849

Inventors:

Herbert L. Davis - Convent Station NJ
Michael L. Jaffe - Summit NJ
Herman L. LaNieve - Charlotte NC
Edward J. Powers - Charlotte NC

Assignee:

Celanese Corporation - New York NY

International Classification:

D01D 512

US Classification:

2642105

Abstract:

An improved process is provided for the formation of a high performance polyester (at least 85 mol percent polyethylene terephthalate) multifilament yarn. The product possesses a high strength (at least 7. 5 grams per denier) and an unusually stable internal structure which renders it particularly suited for use in industrial applications at elevated temperatures. The filaments are melt spun and uniformly quenched under relatively high stress conditions (as described) to yield an as-spun filamentary material of relatively high birefringence (+9. times. 10. sup. -3 to +70. times. 10. sup. -3) which is passed in-line from the quench zone to a first draw zone where it is drawn at a draw ratio of 1. 01:1 to 3. 0:1, and subsequently is drawn (as described) to achieve at least 85 percent of the maximum draw ratio of the as-spun filamentary material. The resulting filamentary material exhibits unusually low shrinkage and hysteresis characteristics (i. e.

US Patent:

42242940, Sep 23, 1980

Filed:

Jan 15, 1979

Appl. No.:

6/003323

Inventors:

Edward J. Powers - Harrison NY

Assignee:

Stauffer Chemical Company - Westport CT

International Classification:

C01B 2530

US Classification:

423309

Abstract:

A mixture of disodium and monosodium orthophosphate in a 2:1 mole ratio is prepared by sequentially reacting phosphoric acid with monohydrate process soda ash and caustic soda in a semi-solid reaction medium. Milled monohydrate process soda ash is contacted in less than stoichiometric proportions with phosphoric acid and the resultant orthophosphate containing reaction mixture is brought to a sodium to phosphorus mole ratio of about 1. 67:1 by subsequent reaction with caustic soda. The final reaction product of mixed disodium and monosodium orthophosphate is suitable feedstock for conversion to sodium tripolyphosphate.

US Patent:

50176811, May 21, 1991

Filed:

Feb 8, 1990

Appl. No.:

7/478163

Inventors:

Lachman Wadhwa - North Plainfield NJ
Michel Bitritto - Summit NJ
Edward J. Powers - Charlotte NC

Assignee:

Hoechst Celanese Corp. - Somerville NJ

International Classification:

C08G 7318

US Classification:

528342

Abstract:

The instant invention involves a process for producing continuous polybenzimidazole films. The process is comprised of the following steps: (a) preparing a solvent solution of a polybenzimidazole polymer; (b) continuously casting the solution upon a support; (c) evaporating a sufficient amount of the solvent to form a self-supporting film in an oven; (d) washing the film in a nonsolvent; (e) removing the film from the support; and (f) continuously collecting the continuous film.

US Patent:

40481395, Sep 13, 1977

Filed:

Feb 11, 1975

Appl. No.:

5/549040

Inventors:

Gordon W. Calundann - North Plainfield NJ
Edward J. Powers - Gillette NJ

Assignee:

Celanese Corporation - New York NY

International Classification:

C08K 322
C08K 330
C08K 534
C08K 536

US Classification:

260 458N

Abstract:

A route is provided for the formation of a polybenzimidazole solid material having an enhanced resistance to undergo the usual color darkening upon exposure to light. A minor concentration of a finely divided pigment found capable of stabilizing the background color inherently manifest by the polybenzimidazole polymer is dispersed in a solution of the polybenzimidazole, and the solvent is removed to produce a polybenzimidazole solid having the pigment substantially uniformly distributed therein. The pigment utilized may be arsenic thioarsenate, copper phthalocyanine, anatase titanium dioxide, or mixtures thereof. Fibers, films, three-dimensional shaped articles, etc. may be formed from the color stabilized polybenzimidazole.