Elizabeth T Grimes

US Patent:

8119231, Feb 21, 2012

Filed:

Mar 21, 2006

Appl. No.:

11/911044

Inventors:

Shi-Jun Yang - Upper Dublin PA, US
Richard M. Abel - Bensalem PA, US
Jack J. Reilly - Blue Bell PA, US
Elizabeth E. Grimes - Souderton PA, US

Assignee:

Arkema France - Colombes

International Classification:

B32B 5/16
B28B 1/00

US Classification:

428323, 428220, 428522, 264165, 264212

Abstract:

The invention relates to a novel acrylic impact sheet having bullet-resistant properties. The bullet-resistant sheet is composed of a copolymer of methyl methacrylate and a Calkyl methacrylate, plus impact modifiers that are refractive index matched or mismatched with the polymer matrix. The sheet provides very good bullet resisting performance, with better performance at the same thickness as current products, or the same performance at less thickness, thereby providing a product having better properties and/or less weight. The reduced weight of a bullet resistant acrylic sheet formulation will provide reduced raw material, transportation, and construction costs. Bullet resistant transparent glazing is an especially useful application for the invention.

US Patent:

20070072994, Mar 29, 2007

Filed:

Sep 27, 2005

Appl. No.:

11/236146

Inventors:

Leslie Cohen - Langhorne PA, US
Elizabeth Grimes - Souderton PA, US
Randall Miller - Glenmore PA, US
Jack Reilly - Blue Bell PA, US

International Classification:

C08L 51/00

US Classification:

525070000

Abstract:

The invention relates to an acrylic sheet that can be die-cut without cracking, yet has low temperature impact resistance and good weatherability. Specifically, the acrylic sheet is an impact modified copolymer having a matrix with a Tg of between 70 and 86 C. In a preferred embodiment the matrix is a copolymer of methyl methacrylate and from 12 to 18 percent by weight of ethyl acrylate.

US Patent:

20100203346, Aug 12, 2010

Filed:

Jun 26, 2008

Appl. No.:

12/669529

Inventors:

Elizabeth E. Grimes - Souderton PA, US
William Todd Rogers - Collegeville PA, US
Claire Michalowicz - Evreux, FR

Assignee:

Arkema Inc. - Philadelphia PA

International Classification:

B32B 27/34
C08G 69/08
C08L 77/00
C08L 33/04
C08L 23/06
C08L 69/00
C08L 9/02
C08L 23/12
C08L 25/06

US Classification:

4284744, 528310, 525420, 525183, 525184, 525433, 525178, 524606

Abstract:

The invention relates to extruded transparent or translucent article that have been melt calendered to improve the physical properties and optical clarity. The polyamide article is a sheet, film, or profile.

US Patent:

20120223453, Sep 6, 2012

Filed:

May 16, 2012

Appl. No.:

13/472748

Inventors:

Elizabeth E. Grimes - Souderton PA, US
William Todd Rogers - Collegeville PA, US
Claire Isabelle Michalowicz - Evreux, FR

Assignee:

Arkema Inc. - King of Prussia PA

International Classification:

B29C 43/24

US Classification:

264175

Abstract:

The invention relates to a process for forming an extruded transparent or translucent polyamide article including melt calendering to improve the physical properties and optical clarity. The polyamide article is a sheet, film, or profile.