Atanu Biswas

US Patent:

6825291, Nov 30, 2004

Filed:

Dec 11, 2000

Appl. No.:

09/734156

Inventors:

Daniel Klosiewicz - Newark DE
Atanu Biswas - Newark DE

Assignee:

Eastman Chemical Resins, Inc. - Kingsport TN

International Classification:

C08F 200

US Classification:

526 87, 526336

Abstract:

A hydrocarbon resin is prepared by (1) thermally polymerizing a mixture consisting essentially of (a) about 5% to 25% by weight styrene or aliphatic or aromatic substituted styrene, and (b) about 95% to 75% by weight based on total monomer content of a cyclic diolefin component comprising at least about 50% by weight dicyclopentadiene. A method of producing an aromatic-modified resin having a Mz of less than 2000 through the addition of about 5% to 25% by weight styrene in combination with about 95% to about 75% DCPD monomer at a rate to consume styrene monomer at a the rate at which it is added. Hydrogenation of this resin produces light colored, thermally stable products that are useful as tackifiers in adhesives.

US Patent:

61438227, Nov 7, 2000

Filed:

Mar 18, 1999

Appl. No.:

9/271754

Inventors:

Paul Joseph Caronia - Annandale NJ
Michael John Keogh - Pinehurst NC
John Salvatore Furno - Somerset NJ
Laurence Herbert Gross - Bridgewater NJ
Frederick F. Nelson - Landenberg PA
Tuyen T. Nguyen - Wilmington DE
Atanu Biswas - Newark DE

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT
Hercules Incorporated - Willington DE

International Classification:

C08L 3304
C08L 3502
C08L 900
C08L 2300
C08L 2304

US Classification:

524849

Abstract:

A composition comprising: (a) polyethylene; (b) as a scorch inhibitor, 1,1-diphenylethylene, substituted or unsubstituted; (c) optionally, a cure booster; and (d) an organic peroxide.

US Patent:

53916700, Feb 21, 1995

Filed:

Aug 9, 1993

Appl. No.:

8/103461

Inventors:

Atanu Biswas - Newark DE
Daniel W. Klosiewicz - Wilmington DE

Assignee:

Hercules Incorporated - Wilmington DE

International Classification:

C08F 3600
C08F 4700
C08F 406
C08F 414

US Classification:

526284

Abstract:

The alkylation resins of this invention comprise the alkylation reaction product of (a) at least one substituted or unsubstituted polycyclic aromatic compound and (b) at least one ethylenically unsaturated hydrocarbon monomer having at least two carbon-carbon double bonds that reacts with the polycyclic aromatic compound by alkylation in the presence of an acid catalyst, wherein the ratio of (a) to (b) in the resin is about 1:9 to about 3:1 by weight. The resins have a weight average molecular weight of less than 10,000 measured by size exclusion chromatography, and a Ring & Ball softening point of about 50. degree. to about 250. degree. C. Because of their high softening point and low molecular weight, the resins are useful in a variety of applications such as flow rate modifiers for engineering polymers, tackifiers for adhesives, and flushing agents for inks.

US Patent:

62779257, Aug 21, 2001

Filed:

Mar 18, 1999

Appl. No.:

9/271906

Inventors:

Atanu Biswas - Newark DE
Paul Joseph Caronia - Annandale NJ
John Salvatore Furno - Newtown CT
Laurence Herbert Gross - Bridgewater NJ
Michael John Keogh - Pinehurst NC
Frederick F. Nelson - Landenberg PA
Tuyen T. Nguyen - Wilmington DE

Assignee:

Hercules Incorporated - Wilmington DE
Plastics Technology Corporation - Danbury CT

International Classification:

C08F 1000

US Classification:

5253337

Abstract:

Curable polymer compositions comprising a crosslinkable polymeric component; an initiator component; and an allyl compound component.

US Patent:

52043525, Apr 20, 1993

Filed:

Sep 29, 1987

Appl. No.:

7/102445

Inventors:

Richard J. Sundberg - Charlottesville VA
Daniel J. Dahlhausen - Columbus OH
Govindarajan Manikumar - Raleigh NC
Babu J. Mavunkel - Baltimore MD
Hikmat A. Musallam - Damascus MD
Atanu Biswas - Cleveland OH
Srinivasan Varadarajan - Stow OH

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

A61K 31435
C07D47104

US Classification:

514258

Abstract:

Novel compounds are provided which exhibit high levels of anti-parasitic activity, specifically against parasites of the genus Trypanosoma. The compounds are comprised of aryl-substituted quaternary heteroaromatic salts which include a positively charged imidazolium or other heterocyclic ring, a linking group, a phenyl ring, and a polar functional group. The polar functional group is preferably a quanylhydrazone or a heterocyclic hydrazone. A method is also provided for treating the diseases associated with Trypanosoma parasites which comprises administering to infected animals or humans an effective amount of a compound of the present invention.