Stephen Chen

US Patent:

6365247, Apr 2, 2002

Filed:

Mar 2, 1999

Appl. No.:

09/254138

Inventors:

Paul J. Cahill - Wheaton IL
Donald F. Ackerley - Joliet IL
Roman F. Barski - Arlington Heights IL
Weilong Chiang Chiang - Naperville IL
David C. Johnson - Naperville IL
Walter M. Nyderek - Tinley Park IL
George E. Rotter - Naperville IL
Stephen Y. Chen - Wheaton IL

Assignee:

BP Corporation North America Inc. - Chicago IL

International Classification:

B29D 2200

US Classification:

428 357

Abstract:

Multilayered plastic bottles are disclosed having oxygen scavenging capacity sufficient to maintain substantially zero or near zero (depending on product requirements) presence of oxygen in the bottle cavity for the planned shelf life of the bottled product under specified storage conditions. The bottles feature a layer comprised of oxygen scavenger copolyester and may be used for bottling beer and other products requiring nearly total absence of oxygen for the duration of the target product shelf life.

US Patent:

6369148, Apr 9, 2002

Filed:

Mar 18, 1998

Appl. No.:

09/044043

Inventors:

Weilong L. Chiang - Naperville IL
Boh C. Tsai - Inverness IL
Stephen Y. Chen - Wheaton IL
Lakshmi N. Venkateshwaran - Freehold NJ

Assignee:

Ciba Specialty Chemicals Corporation - Tarrytown NY

International Classification:

C01B 300

US Classification:

524417, 25218828

Abstract:

Oxygen-scavenging compositions comprising an oxidizable metal component, an electrolyte component and a solid, non-electrolytic, acidifying component. When blended with soft, flexible polymeric resins, these compositions exhibit good oxygen-scavenging performance with improved oxidation efficiency relative to compositions containing an oxidizable metal component, an electrolyte, and an acidifying component combined with a more rigid thermoplastic resins. Selection of a thermally stable non-electrolytic, acidifying component is important when melt compounding the compositions into polymeric resins and particularly for extrusion coating applications. The compositions can be used directly as an oxygen absorbent resin melt-fabricated into a wide variety of oxygen-scavenging packaging articles or as concentrates in combination with other thermoplastic resins.

US Patent:

6509436, Jan 21, 2003

Filed:

Jun 29, 2000

Appl. No.:

09/606459

Inventors:

Paul J. Cahill - Wheaton IL
Stephen Y. Chen - Wheaton IL

Assignee:

BP Corporation North America Inc. - Chicago IL

International Classification:

C08G 6378

US Classification:

528277, 5253261

Abstract:

Compositions for scavenging oxygen are disclosed. These compositions comprise condensation copolymers comprising predominantly polyester segments and an oxygen scavenging amount of polyolefin oligomer segments. The polyester segments comprise segments derived from typical bottling and packaging polyesters such as PET and PEN. The copolymers are preferably formed by transesterification during reactive extrusion and typically comprise about 0. 5 to about 12 wt % of polyolefin oligomer segments. The copolycondensates are capable of absorbing at least 0. 4 cc of oxygen per gram of copolymer in the solid state at ambient temperatures and are typically used as layers in films, liners, cups, wraps, bottles, etc. Use of these oxygen scavenging compositions in bottles provides a clear and rigid bottle similar in appearance to unmodified polyester bottles. In a series of preferred embodiments, bottles fabricated with the oxygen scavenging copolycondensates of this invention are over 99.

US Patent:

6558762, May 6, 2003

Filed:

Mar 28, 2002

Appl. No.:

10/112853

Inventors:

Paul J. Cahill - Wheaton IL
George E. Rotter - Naperville IL
Stephen Y. Chen - Wheaton IL

Assignee:

BP Corporation North America Inc. - Chicago IL

International Classification:

B29D 2200

US Classification:

428 357

Abstract:

Multilayered plastic bottles are disclosed having oxygen scavenging capacity sufficient to maintain substantially zero or near zero (depending on product requirements) presence of oxygen in the bottle cavity for the planned shelf life of the bottled product under specified storage conditions. The bottles feature a layer comprised of oxygen scavenger copolyester and may be used for bottling beer and other products requiring nearly total absence of oxygen for the duration of the target product shelf life.

US Patent:

6586514, Jul 1, 2003

Filed:

Jan 4, 2002

Appl. No.:

10/039736

Inventors:

Weilong L. Chiang - Naperville IL
Boh C. Tsai - Inverness IL
Stephen Y. Chen - Wheaton IL
Lakshmi N. Venkateshwaran - Freehold NJ

Assignee:

Ciba Specialty Chemicals Corporation - Tarrytown NY

International Classification:

C08K 332

US Classification:

524417, 524440, 524441

Abstract:

Oxygen-scavenging compositions comprising an oxidizable metal component, an electrolyte component and a solid, non-electrolytic, acidifying component. When blended with soft, flexible polymeric resins, these compositions exhibit good oxygen-scavenging performance with improved oxidation efficiency relative to compositions containing an oxidizable metal component, an electrolyte, and an acidifying component combined with a more rigid thermoplastic resins. Selection of a thermally stable non-electrolytic, acidifying component is important when melt compounding the compositions into polymeric resins and particularly for extrusion coating applications. The compositions can be used directly as an oxygen absorbent resin melt-fabricated into a wide variety of oxygen-scavenging packaging articles or as concentrates in combination with other thermoplastic resins.

US Patent:

55569269, Sep 17, 1996

Filed:

Jan 30, 1996

Appl. No.:

8/593839

Inventors:

George E. Rotter - Clarendon Hills IL
Weilong Chiang - Napeville IL
Boh C. Tsai - Inverness IL
John L. Melquist - Naperville IL
Cheryl A. Pauer - Aurora IL
Stephen Y. Chen - Wheaton IL

Assignee:

Amoco Corporation - Chicago IL

International Classification:

C08F 2000

US Classification:

525444

Abstract:

Concentrates produced by melt processing a branching agent and a polyester carrier are disclosed. The concentrates are useful in melt processing polyesters. The concentrates contain sufficiently high concentrations of a branching agent to minimize the formation of crosslinked compounds in the concentrates. Process for using the concentrate also are disclosed.

US Patent:

60835850, Jul 4, 2000

Filed:

Sep 23, 1996

Appl. No.:

8/717370

Inventors:

Paul J. Cahill - Wheaton IL
Stephen Y. Chen - Wheaton IL

Assignee:

BP Amoco Corporation - Chicago IL

International Classification:

B29D 2200

US Classification:

428 357

Abstract:

Compositions for scavenging oxygen are disclosed. These compositions comprise condensation copolymers comprising predominantly polyester segments and an oxygen scavenging amount of polyolefin oligomer segments. The polyester segments comprise segments derived from typical bottling and packaging polyesters such as PET and PEN. The copolymers are preferably formed by transesterification during reactive extrusion and typically comprise about 0. 5 to about 12 wt % of polyolefin oligomer segments. The copolycondensates are capable of absorbing at least 0. 4 cc of oxygen per gram of copolymer in the solid state at ambient temperatures and are typically used as layers in films, liners, cups, wraps, bottles, etc. Use of these oxygen scavenging compositions in bottles provides a clear and rigid bottle similar in appearance to unmodified polyester bottles. In a series of preferred embodiments, bottles fabricated with the oxygen scavenging copolycondensates of this invention are over 99.

US Patent:

41750713, Nov 20, 1979

Filed:

Jul 7, 1978

Appl. No.:

5/922543

Inventors:

Stephen Y. Chen - Elburn IL
Thomas M. Quinn - St. Charles IL

Assignee:

Standard Oil Company - Chicago IL

International Classification:

C08K 322
C08K 502

US Classification:

260 4244

Abstract:

Titanium dioxide, incorporated into vinyl polymers which contain halogenated organic compounds, screens ultraviolet radiation and thus reduces halogen discoloration.