David G Guillot

US Patent:

6566420, May 20, 2003

Filed:

Jan 12, 2000

Appl. No.:

09/481709

Inventors:

David G. Guillot - Tremonton UT
Albert R. Harvey - Brigham City UT

Assignee:

Alliant Techsystems Inc. - Edina MN

International Classification:

C08L 900

US Classification:

523138, 524492, 524526, 5253317, 5253323, 602001, 60204

Abstract:

A novel and improved EPDM formulation for a solid propellant rocket motor is described wherein hexadiene EPDM monomer components are replaced by alkylidene norbornene components and with appropriate adjustment of curing and other additives functionally-required rheological and physical characteristics are achieved with the desired compatibility with any one of a plurality of solid filler materials, e. g. powder silica, carbon fibers or aramid fibers, and with appropriate adhesion and extended storage or shelf life characteristics.

US Patent:

6787586, Sep 7, 2004

Filed:

Dec 3, 2002

Appl. No.:

10/310005

Inventors:

David G. Guillot - Tremonton UT
Albert R. Harvey - Brigham City UT

Assignee:

Alliant Techsystems Inc. - Edina MN

International Classification:

C08L21018

US Classification:

523138, 524492, 524495, 524526, 5253317, 602001, 60204

Abstract:

A novel and improved EPDM formulation for a solid propellant rocket motor is described wherein hexadiene EPDM monomer components are replaced by alkylidene norbornene components, and, with appropriate adjustment of curing and other additives, functionally required rheological and physical characteristics are achieved with the desired compatibility with any one of a plurality of solid filler materials, e. g. , powder silica, carbon fibers or aramid fibers, and with appropriate adhesion and extended storage or shelf-life characteristics.

US Patent:

6893597, May 17, 2005

Filed:

Dec 21, 2000

Appl. No.:

09/747192

Inventors:

David G. Guillot - Tremonton UT, US

Assignee:

Alliant Techsystems Inc. - Edina MN

International Classification:

B29C065/00

US Classification:

264267, 264129, 26432818, 264148, 264175

Abstract:

This method permits manufacturing EPDM rocket motor insulation in which carbon fibers are dispersed and immobilized in the EPDM polymeric matrix but are not excessively fractured or fragmentized, i. e. , broken into smaller fragments, when encountering degrees of shear necessary to homogeneously or otherwise distribute or disperse the carbon fibers in the EPDM polymeric matrix. The method is substantially solvent free and is performed via distributive/reduced shear mixing to distribute the fragile carbon fibers into a rubber matrix without excessive damage. According to one embodiment, at least about 50% of the elastomer composition introduced into the mixing apparatus is liquid EPDM terpolymer having sufficiently low molecular weight and high diene content to permit dispersion of the carbon fibers in the EPDM without substantial fragmentation of the fibers. According to another embodiment, mixing takes place in a kneader capable of rotating a screw having a discontinuous screw thread about the screw axis while superimposing an axially reciprocating stroke to the screw. The kneader imparts low shear distributive mixing of the carbon fibers in the EPDM terpolymer.

US Patent:

7358314, Apr 15, 2008

Filed:

Aug 18, 2005

Appl. No.:

11/207855

Inventors:

Himansu M. Gajiwala - Layton UT, US
David G. Guillot - Tremonton UT, US

Assignee:

Alliant Techsystems Inc. - Edina MN

International Classification:

C08F 36/06
C08F 136/04
C06D 5/00

US Classification:

526335, 526260, 602001, 60204, 102291

Abstract:

An insulation composition that comprises at least one nitrile butadiene rubber (“NBR”) having an acrylonitrile content that ranges from approximately 26% by weight to approximately 35% by weight and polybenzoxazole (“PBO”) fibers. The NBR may be a copolymer of acrylonitrile and butadiene and may be present in the insulation composition in a range of from approximately 45% by weight to approximately 56% by weight of a total weight of the insulation composition. The PBO fibers may be present in a range of from approximately 3% by weight to approximately 10% by weight of a total weight of the insulation composition. A rocket motor including the insulation composition and a method of insulating a rocket motor are also disclosed.

US Patent:

7371784, May 13, 2008

Filed:

Aug 31, 2004

Appl. No.:

10/931778

Inventors:

David G. Guillot - Tremonton UT, US
Albert R. Harvey - Brigham City UT, US

Assignee:

Alliant Techsystems Inc. - Edina MN

International Classification:

F02K 9/34
C08K 3/04
C08K 3/36

US Classification:

523138, 524492, 524495

Abstract:

A novel and improved EPDM formulation for a solid propellant rocket motor is described wherein hexadiene EPDM monomer components are replaced by alkylidene norbornene components, and, with appropriate adjustment of curing and other additives, functionally required rheological and physical characteristics are achieved with the desired compatibility with any one of a plurality of solid filler materials, e. g. , powder silica, carbon fibers or aramid fibers, and with appropriate adhesion and extended storage or shelf-life characteristics.

US Patent:

7410607, Aug 12, 2008

Filed:

Sep 10, 2004

Appl. No.:

10/938446

Inventors:

David G. Guillot - Tremonton UT, US

Assignee:

Alliant Techsystems Inc. - Minneapolis MN

International Classification:

B29C 70/02
B29C 70/28

US Classification:

264241, 264238, 26432818

Abstract:

This method permits manufacturing EPDM rocket motor insulation in which carbon fibers are dispersed and immobilized in the EPDM polymeric matrix but are not excessively fractured or fragmentized, i. e. , broken into smaller fragments, when encountering degrees of shear necessary to homogeneously or otherwise distribute or disperse the carbon fibers in the EPDM polymeric matrix. The method is substantially solvent free and is performed via distributive/reduced shear mixing to distribute the fragile carbon fibers into a rubber matrix without excessive damage. According to one embodiment, at least about 50% of the elastomer composition introduced into the mixing apparatus is liquid EPDM terpolymer having sufficiently low molecular weight and high diene content to permit dispersion of the carbon fibers in the EPDM without substantial fragmentation of the fibers. According to another embodiment, mixing takes place in a kneader capable of rotating a screw having a discontinuous screw thread about the screw axis while superimposing an axially reciprocating stroke to the screw. The kneader imparts low shear distributive mixing of the carbon fibers in the EPDM terpolymer.

US Patent:

53523121, Oct 4, 1994

Filed:

Aug 6, 1992

Appl. No.:

7/927135

Inventors:

David G. Guillot - Tremonton UT

Assignee:

Thiokol Corporation - Ogden UT

International Classification:

B32B 3120
B65H 8106
C09K 2114
F02K 908

US Classification:

156172

Abstract:

Rocket motor insulation compositions are provided. An important component of such insulation compositions is a thermoplastic liquid crystal polymer. Such a polymer provides an ablative insulation which has good performance characteristics during operation of the rocket motor. One such thermoplastic liquid crystal polymer is a wholly aromatic polyester known as VECTRA. RTM. The insulation may also include fillers such as fibrous fillers and particulate fillers. Typical fibrous fillers include glass or carbon fibers. Typical particulate fillers include materials such as silica, alumina, powdered coal, and the like.

US Patent:

56440006, Jul 1, 1997

Filed:

Mar 10, 1989

Appl. No.:

7/322273

Inventors:

David G. Guillot - Tremonton UT

Assignee:

Thiokol Corporation - Ogden UT

International Classification:

C08L 900
C08L 700

US Classification:

525236

Abstract:

A low shear modulus vulcanizate for construction of flexible bearings, particularly for rocket motors, consisting essentially of a mixture of two natural or synthetic rubber copolymers, the first having about 92% cis-1,4-polyisoprene and about 8% trans-1,4-polyisoprene moieties and the second having about 98% by weight cis-1,4-polyisoprene and about 2% by weight trans-1,4-polyisoprene moieties. The composition is lightly filled and contains a low proportion of sulfur, so the vulcanizate has the required low shear modulus, low rate of thermal crystallization at low temperatures, and an acceptably high shear strength.