Donald D Robinson

US Patent:

39608255, Jun 1, 1976

Filed:

Oct 15, 1973

Appl. No.:

5/406753

Inventors:

Donald Nellis Robinson - Collegeville PA
Charles Benjamin Welsh - Blue Bell PA

Assignee:

Pennwalt Corporation - Philadelphia PA

International Classification:

C08F21002
C08F21424

US Classification:

526206

Abstract:

A tough, flexible, nonelastic, high-modulus terpolymer composed of copolymerized units, in mole percents, of 45 to 55% ethylene, 40 to 50% tetrafluoroethylene and 3 to 9% hexafluoropropylene.

US Patent:

43281516, May 4, 1982

Filed:

Apr 3, 1981

Appl. No.:

6/250827

Inventors:

Donald N. Robinson - Collegeville PA

Assignee:

Pennwalt Corporation - Philadelphia PA

International Classification:

C08K 304
C08K 706

US Classification:

523205

Abstract:

Low shrinkage, mechanically strong, acid stable, carbon fiber reinforced poly(vinylidene fluoride) resin compositions are prepared by extrusion blending carbon fibers, which have been precoated with poly(vinylidene fluoride), with a poly(vinylidene fluoride) resin.

US Patent:

55890288, Dec 31, 1996

Filed:

May 30, 1995

Appl. No.:

8/453796

Inventors:

Donald N. Robinson - Collegeville PA
John H. Peltz - Glenolden PA

Assignee:

Elf Atochem North America, Inc. - Philadelphia PA

International Classification:

C09J 510

US Classification:

1563066

Abstract:

A hot melt adhesive tie layer polymer blend for firmly adhering polyethylene to fluropolymers is disclosed.

US Patent:

43840477, May 17, 1983

Filed:

Jan 22, 1982

Appl. No.:

6/341956

Inventors:

William D. Benzinger - Eastown Township, Chester County PA
Donald N. Robinson - Collegeville PA

Assignee:

Pennwalt Corporation - Philadelphia PA

International Classification:

B29D 2704
C08J 928

US Classification:

521 64

Abstract:

Vinylidene fluoride polymer ultrafiltration membranes are prepared by casting a sheet of said polymer dissolved in a mixture of a specified solvent and a specified non-solvent, on a smooth substrate, evaporating a portion of the solvent from the sheet, immersing said sheet in a gelation liquid therefore, and optionally, stabilizing the gelled sheet by heat treatment thereof. A porous vinylidene fluoride polymer membrane having smooth, unwrinkled surfaces can be prepared in accordance with the above described process without restraining the membrane during the evaporation and gelation steps by utilizing triethyl phosphate as the solvent.

US Patent:

41027604, Jul 25, 1978

Filed:

Jan 21, 1977

Appl. No.:

5/761153

Inventors:

Donald Nellis Robinson - Collegeville PA
Adrian Samuel Fox - Framingham MA

Assignee:

Pennwalt Corporation - Philadelphia PA

International Classification:

C08F 818
C08F 834

US Classification:

20415918

Abstract:

Vinylidene fluoride polymer resin dispersed in carbon tetrachloride is chlorinated at elevated temperature in the presence of a specified initiator compound and triethanolamine and with exposure to ultraviolet light.