Cary Wayne Martin

US Patent:

6475596, Nov 5, 2002

Filed:

Nov 30, 2000

Appl. No.:

09/726940

Inventors:

Hao-Ming Hsiao - San Ramon CA
Shaw Ming Lee - Danville CA
Robert Albert Buyny - Clayton CA
Cary Joseph Martin - Dublin CA

Assignee:

Hexcel Corporation - Pleasanton CA

International Classification:

B32B 502

US Classification:

428116, 428119, 428219, 428208, 428220, 442179, 442195

Abstract:

A core crush resistant prepreg for use in making a fiber reinforced composite panel structure is provided. The prepreg comprises a woven fabric consisting essentially of carbon fiber tow strands impregnated with a hardenable polymeric resin composition. Typically the fabric has an areal weight of from about 180 to about 205 grams per square meter. The prepreg has an average fiber tow aspect ratio of less than about 15. 4, a prepreg thickness of at least about 0. 245 mm, and a prepreg openness of at least about 1. 2 percent but less than about 6. 0 percent. Preferably, the resin composition is predominantly viscous in nature and has a tan value of between 0. 9 and 2. 0 at an elevated temperature between 70Â C. and 140Â C. , and an average epoxy functionality of greater than 2.

US Patent:

6663737, Dec 16, 2003

Filed:

Jun 7, 2001

Appl. No.:

09/876310

Inventors:

Hao-Ming Hsiao - San Ramon CA
Shaw Ming Lee - Danville CA
Robert Albert Buyny - Clayton CA
Cary Joseph Martin - Dublin CA

Assignee:

Hexcel Corporation - Dublin CA

International Classification:

B32B 312

US Classification:

156160, 156161, 427445, 428116, 442195, 442179, 442181

Abstract:

A core crush resistant prepreg for use in making a fiber reinforced composite panel structure is provided. The prepreg comprises a woven fabric consisting essentially of carbon fiber tow strands impregnated with a hardenable polymeric resin composition. Typically the fabric has an areal weight of from about 180 to about 205 grams per square meter. The prepreg has an average fiber tow aspect ratio of less than about 15. 4, a prepreg thickness of at least about 0. 245 mm, and a prepreg openness of at least about 1. 2 percent but less than about 6. 0 percent. Preferably, the resin composition is predominantly viscous in nature and has a tan value of between 0. 9 and 2. 0 at an elevated temperature between 70Â C. and 140Â C. , and an average epoxy functionality of greater than 2.

US Patent:

7041740, May 9, 2006

Filed:

Sep 26, 2003

Appl. No.:

10/672006

Inventors:

Cary J. Martin - Dublin CA, US

Assignee:

Hexcel Corporation - Dublin CA

International Classification:

C08F 8/00
C08J 3/00
C08L 23/00
C08L 23/04
C08L 37/00
C08L 41/00
B29C 47/00
H05B 6/00

US Classification:

525191, 525192, 525197, 525198, 525208, 525241, 264460, 264463, 264477

Abstract:

Heat-settable epoxy resin mixtures are provided that can be used alone or in combination with fibers to form large composite material structures without the need for high consolidation pressures. The heat-settable resin mixture is composed of a resin component, curing agent component and a particulate component. The particulate component includes rigid-rod polymer particles that dissolve when the heat-settable resin is heated to temperatures within a predetermined processing window. After heating to the processing temperature, the resulting heat-set resin is cooled to form a curable solid resin. The curable solid resin may be stored indefinitely or re-heated to curing temperatures to form a cured product.

US Patent:

20060292375, Dec 28, 2006

Filed:

Jun 28, 2005

Appl. No.:

11/168971

Inventors:

Cary Martin - Livermore CA, US

International Classification:

B32B 27/38
B32B 27/04
C08L 63/00
B32B 37/00

US Classification:

428413000, 428297400, 525523000, 525528000

Abstract:

Uncured thermosetting resins are loaded with relatively high amounts of solid thermoplastic resin particles to form a resin precursor. The resin precursor is heat treated so as to produce an uncured resin composition wherein the thermoplastic resin particles become substantially dissolved in the thermosetting resin without causing cure of the resin mixture. Heat treatment of highly loaded thermosetting resins in accordance with the present invention provides uncured resin compositions that are well suited for use in fabricating composite structures and particularly prepreg for use in lightning protection surface coatings.

US Patent:

62616757, Jul 17, 2001

Filed:

Mar 23, 1999

Appl. No.:

9/273637

Inventors:

Hao-Ming Hsiao - San Ramon CA
Shaw Ming Lee - Danville CA
Robert Albert Buyny - Clayton CA
Cary Joseph Martin - Dublin CA

Assignee:

Hexcel Corporation - Pleasanton CA

International Classification:

B32B 502

US Classification:

428219

Abstract:

A core crush resistant prepreg for use in making a fiber reinforced composite panel structure is provided. The prepreg comprises a woven fabric consisting essentially of carbon fiber tow strands impregnated with a hardenable polymeric resin composition. Typically the fabric has an areal weight of from about 180 to about 205 grams per square meter. The prepreg has an average fiber tow aspect ratio of less than about 15. 4, a prepreg thickness of at least about 0. 245 mm, and a prepreg openness of at least about 1. 2 percent but less than about 6. 0 percent. Preferably, the resin composition is predominantly viscous in nature and has a tan. delta. value of between 0. 9 and 2. 0 at an elevated temperature between 70. degree. C. and 140. degree. C. , and an average epoxy functionality of greater than 2. A method for evaluating core crush resistance properties of a prepreg is also provided.