David Ray Mcdonald

US Patent:

7238742, Jul 3, 2007

Filed:

May 15, 2003

Appl. No.:

10/438492

Inventors:

Richard Henry Weese - Philadelphia PA, US
Eugene Patrick Dougherty - Langhorne PA, US
David John McDonald - Fairless Hills PA, US
Jean Marie Brady - Maple Glen PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08F 290/04

US Classification:

524504, 524502

Abstract:

Aqueous-form additive systems, and methods of blending the same with a matrix resin, are disclosed whereby acrylic-based impact modifier compositions, butadiene-based impact modifier compositions and acrylic-based processing aids are used in aqueous form without the need for isolation to the traditional powder-form. The aqueous additive systems of the present invention provide a means for the design of novel additive compositions. The aqueous additive systems of the present invention also provide a great degree of flexibility in preparation of matrix resin blends and formulations. Additionally, the aqueous additive systems of the present invention allow for the reduced cost of manufacturing additives and reduced cost in blending matrix resin formulations.

US Patent:

7309729, Dec 18, 2007

Filed:

Mar 7, 2000

Appl. No.:

09/520249

Inventors:

Richard Henry Weese - Washington Crossing PA, US
Eugene Patrick Dougherty - Langhorne PA, US
Jean Marie Brady - Maple Glen PA, US
David John McDonald - Fairless Hills PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08F 290/04

US Classification:

524504

Abstract:

Aqueous-form additive systems, and methods of blending the same with a matrix resin, are disclosed whereby acrylic-based impact modifier compositions, butadiene-based impact modifier compositions and acrylic-based processing aids are used in aqueous form without the need for isolation to the traditional powder-form. The aqueous additive systems of the present invention provide a means for the design of novel additive compositions. The aqueous additive systems of the present invention also provide a great degree of flexibility in preparation of matrix resin blends and formulations. Additionally, the aqueous additive systems of the present invention allow for the reduced cost of manufacturing additives and reduced cost in blending matrix resin formulations.

US Patent:

8080612, Dec 20, 2011

Filed:

Jul 14, 2005

Appl. No.:

11/181086

Inventors:

Edward Joseph Troy - Bristol PA, US
David John McDonald - Fairless Hills PA, US
Jane Elizabeth Weier - Hopewell NJ, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08L 27/02
C08L 27/06
C08L 33/06
C08L 9/00

US Classification:

525 71, 525 83, 525 85, 525227, 525228, 525239

Abstract:

The present invention provides polymeric compositions having a high polymer size and a low Tg. These novel compositions are useful as plastic additives. Also provided is a method of improving the processing of a matrix resin by adding one or more of the novel polymeric compositions.

US Patent:

20040039123, Feb 26, 2004

Filed:

May 5, 2003

Appl. No.:

10/430195

Inventors:

Edward Troy - Bristol PA, US
David McDonald - Fairless Hills PA, US
Jane Weier - Hopewell NJ, US

International Classification:

C08L033/06

US Classification:

525/224000

Abstract:

The present invention provides polymeric compositions having a high polymer size and a low Tg. These novel compositions are useful as plastic additives. Also provided is a method of improving the processing of a matrix resin by adding one or more of the novel polymeric compositions.

US Patent:

57062765, Jan 6, 1998

Filed:

May 4, 1995

Appl. No.:

8/435030

Inventors:

Ahmet Vecdet Arslan - Plainsboro NJ
James D. Bobeck - Leesport PA
Jeffrey A. Gerrish - Newburyport MA
David Ellis McDonald - Plaistow NH

Assignee:

Lucent Technologies, Inc. - Murray Hill NJ

International Classification:

H04L 122

US Classification:

370216

Abstract:

Difficulties with prior disrupted communications restoration systems are overcome by employing for each node of a communications network a restoration processor in which predetermined functions of the restoration process are managed by respective ones of a plurality of manager modules. The manager modules are arranged to be directly interconnected only with a so-called restoration manager that coordinates the operations of the modules and provides for their interconnection needs. In a preferred embodiment, four manager modules, a) a user interface manager module, b) a digital cross-connect system (DCS) manager module, c) a distributed communications manager module and d) a core algorithm manager module, are interconnected and coordinated by the restoration manager. Additional robustness to the restoration process is provided by way of enhancements to the functionality of the core algorithm manager module. These enhancements include: a) improved glare processing (resolution of contention for a particular resource), b) "broadcast" of takedown messages, c) elimination of the need for time-outs during automatic restoration, d) a "peek ahead" routine that immediately takes down a needed resource that is already on a list to be taken down, e) use of a "minimax factor" and f) a "quick fix" technique for use in cases of limited failure of circuits between two nodes.

US Patent:

54446937, Aug 22, 1995

Filed:

Apr 27, 1992

Appl. No.:

7/874773

Inventors:

Ahmet V. Arslan - Plainsboro NJ
James D. Bobeck - Leesport PA
Jeffrey A. Gerrish - Newburyport MA
David E. McDonald - Plaistow NH

Assignee:

AT&T Corp. - Murray Hill NJ

International Classification:

H04L 122

US Classification:

370 16

Abstract:

Difficulties with prior disrupted communications restoration systems are overcome by employing for each node of a communications network a restoration processor in which predetermined functions of the restoration process are managed by respective ones of a plurality of manager modules. The manager modules are arranged to be directly interconnected only with a so-called restoration manager that coordinates the operations of the modules and provides for their interconnection needs. In a preferred embodiment, four manager modules, a) a user interface manager module, b) a digital cross-connect system (DCS) manager module, c) a distributed communications manager module and d) a core algorithm manager module, are interconnected and coordinated by the restoration manager. Additional robustness to the restoration process is provided by way of enhancements to the functionality of the core algorithm manager module. These enhancements include: a) improved glare processing (resolution of contention for a particular resource), b) "broadcast" of takedown messages, c) elimination of the need for time-outs during automatic restoration, d) a "peek ahead" routine that immediately takes down a needed resource that is already on a list to be taken down, e) use of a "minimax factor" and f) a "quick fix" technique for use in cases of limited failure of circuits between two nodes.