Stephen H Fagan

US Patent:

61721808, Jan 9, 2001

Filed:

Aug 25, 1998

Appl. No.:

9/140284

Inventors:

Lawrence F. Hancock - North Andover MA
Stephen M. Fagan - Newtonville MA
Claudy J.-P. Mullon - Framingham MA

Assignee:

Circe Biomedical, Inc. - Lexington MA

International Classification:

C08G 7523

US Classification:

528391

Abstract:

The present invention relates to a block copolymer containing 1-50 first polymer segments and 1-50 second polymer segments. Each first polymer segment has an average mole fraction of monomers possessing a branch point of 0. 0001 to 1, whereas each second polymer segment has an average mole fraction of monomers possessing a branch point of 0 to 0. 5. The average molecular weights range from 5-2,000 kDa for the first polymer segments, which constitute 5-95% by weight of the block copolymer. The average molecular weights also range from 5-2,000 kDa for the second polymer segments, which constitute 5-95% by weight of the block copolymer. The ratio of the average mole fraction of monomers possessing a branch point of the second polymer segments to that of the first polymer segments is 0 to 0. 5. An example of such a copolymer has ethylene oxide or ethylene oxide/propylene oxide as the first polymer segment and polysulfone as the second polymer segment. This block copolymer can further be blended with a bulk polymer.

US Patent:

58499296, Dec 15, 1998

Filed:

Sep 26, 1997

Appl. No.:

8/938895

Inventors:

Leonid B. Volodarsky - Novosibirsk, RU
Stephen M. Fagan - Newtonville MA

Assignee:

Uniroyal Chemical Company, Inc. - Middlebury CT

International Classification:

C07D23304
C07D23306
C07D23308

US Classification:

5483471

Abstract:

A process is provided for the preparation of imidazoline derivatives such as imidazoline nitroxyls and 1-hydroxy imidazoline.