Richard A Lassor

US Patent:

20090163609, Jun 25, 2009

Filed:

Dec 20, 2007

Appl. No.:

11/961230

Inventors:

Richard D. Lassor - Averill Park NY, US
Randall Todd Myers - Pittsfield MA, US
Michael Kane Pilliod - San Francisco CA, US
Erich Otto Teutsch - Richmond MA, US

International Classification:

C08G 73/10

US Classification:

521 55, 521184

Abstract:

Polyetherimide foam materials, articles that include these foam materials and methods of making these foam materials and articles. The foam extrusion process uses selected blowing agents, equipment design and processing conditions to produce continuously extruded foam with a substantially uniform cell size in a lower density PEI foam, such as 25 to 50 g/L or a higher density PEI foam, such as 120 to 300 g/L. Due to the greater densities that can be produced as well as the characteristics inherent in polyetherimide articles, the resulting foam materials are suitable for a much broader range of applications.

US Patent:

20090163610, Jun 25, 2009

Filed:

Dec 20, 2007

Appl. No.:

11/961328

Inventors:

Vincent L. Lanning - Pittsfield MA, US
Richard D. Lassor - Averill Park NY, US
Randall Todd Myers - Pittsfield MA, US
Michael Kane Pilliod - San Francisco CA, US
Erich Otto Teutsch - Richmond MA, US

International Classification:

C08J 9/04

US Classification:

521 79

Abstract:

A continuous process of making polyetherimide foam materials and articles that include these foam materials. The continuous process is a foam extrusion process that uses selected blowing agents, equipment design and processing conditions to continuously produce extruded foam with a substantially uniform cell size in a wide range of cell densities. Subsequent heating may be used in certain embodiments to remove any residual components from the foam, such as any blowing agents or nucleating agents. Due to the greater densities as well as the characteristics inherent in polyetherimide articles, the resulting foam materials are suitable for a much broader range of applications. The continuous process provides a more cost effective product while also avoiding the use of Freon and/or other agents potentially harmful to the environment.