David R Dunaway

US Patent:

7220801, May 22, 2007

Filed:

Jun 11, 2002

Appl. No.:

10/480570

Inventors:

David B. Dunaway - Houston TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08L 23/04
C08L 23/14
C08L 23/16
B29B 39/14
B29B 41/24

US Classification:

525240, 264166, 264167, 2641711, 26417219

Abstract:

In one embodiment, the present invention is directed to an article, such as a blow-molded bottle, formed from a polymer blend composition. In one aspect, the article is formed by blow-molding techniques. In one aspect, the article is a blow-molded container having a Bruceton Mean Drop Height of 3. 8 feet or above. In another aspect, the article is a blow-molded container having a volume of 60 fluid ounces or greater. In general, the polymer blend composition comprises polypropylene and an impact modifier of metallocene-produced very low density polyethylene or linear low density polyethylene. In one embodiment, the polypropylene polymer comprises a random copolymer. In one embodiment the metallocene-catalyzed linear very low density polyethylene polymer has one or more of the following: (a) a density of less than 0. 916 g/cm, (b) a composition distribution breadth index of 50 to 85% by weight, (c) a molecular weight distribution Mw/Mn of 2. 0 to 3. 0, (d) a molecular weight distribution Mz/Mw of less than 2.

US Patent:

7714043, May 11, 2010

Filed:

Mar 11, 2009

Appl. No.:

12/402211

Inventors:

Donald S. Tracey - Kingwood TX, US
Andy H. Tsou - Allentown PA, US
Bryan R. Chapman - Annandale NJ, US
Bruce A. Harrington - Houston TX, US
David B. Dunaway - Houston TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

B29C 47/00
D21H 18/58

US Classification:

524 13, 524 52

Abstract:

Provided are elastomeric compositions, such as a tire innerliner, comprising at least one isobutylene based elastomer and at least one hydrocarbon fluid additive (“HFA”). The compositions have improved cold temperature properties and are particularly useful as tire innerliners for an aircraft tire. The use of a HFA in the elastomeric composition may allow for the use of reduced amounts of secondary elastomers, such as natural rubber, while allowing for an improved balance in the composition's brittleness and permeability properties. Examples of useful HFAs include polyalphaolefins, high purity hydrocarbon fluids, and water white group III mineral oils.

US Patent:

8143352, Mar 27, 2012

Filed:

Dec 17, 2007

Appl. No.:

12/002509

Inventors:

Gabor Kiss - Hampton NJ, US
Patrick Brant - Seabrook TX, US
Robert Charles Portnoy - Houston TX, US
David B. Dunaway - Houston TX, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

C08F 2/04
C08F 2/06

US Classification:

525240, 525 52, 525 53, 525 54, 525191, 526 64, 526 65, 526 68

Abstract:

A process for fluid phase in-line blending of polymers. The process includes providing two or more reactor trains configured in parallel and a separator for product blending and product-feed separation; contacting in at least one of the parallel reactor trains olefin monomers having three or more carbon atoms, catalyst systems, optional comonomers, optional scavengers, and optional inert diluents or inert solvents, at a temperature above the solid-fluid phase transition temperature of the polymerization system and a pressure no lower than 10 MPa below the cloud point pressure of the polymerization system and less than 1500 MPa; forming a reactor effluent including a homogeneous fluid phase polymer-monomer mixture in each parallel reactor train; combining the reactor effluent from each parallel reactor; passing the combined reactor effluent through the separator; maintaining the temperature and pressure within the separator above the solid-fluid phase transition point but below the cloud point pressure and temperature to form a fluid-fluid two-phase system including a polymer-rich blend phase and a monomer-rich phase; and separating the monomer-rich phase from the polymer-rich blend phase. The separated monomer-rich phase is recycled to the polymerization reactor bank. The polymer-rich blend phase is conveyed to a downstream finishing stage for further monomer stripping, drying and/or pelletizing to form a polymer product blend.

US Patent:

8192813, Jun 5, 2012

Filed:

Jun 18, 2008

Appl. No.:

12/141500

Inventors:

Gary Lee Runyan - Plano TX, US
Bruce A. Harrinton - Houston TX, US
Bryan R. Chapman - Annandale NJ, US
David B. Dunaway - Houston TX, US
Gerd Arthur Allenmann - Overijse, BE
Robert G. Russell - Sulphur Springs TX, US
Rodney Mize - Cooper TX, US

Assignee:

ExxonMobil Chemical Patents, Inc. - Baytown TX
Zurn Pex, Inc. - Commerce TX

International Classification:

C08K 5/01
C08L 23/12
C08L 23/14
C08J 3/18

US Classification:

428 357, 524491, 524490, 524848, 524348, 5243486

Abstract:

A high strength, flexible crosslinked polyethylene (PEX) material is provided wherein the base polymer is intermixed with a polymer modifier which affects the amorphous region of the polymer, leaving the crystalline portion of the base polymer virtually unaffected. Consequently, the amorphous region's density is lowered, resulting in a more flexible final product, while the crosslinked molecular structure and/or crystalline portion of the polymer, which controls the strength of the base polymer, remains strong. The polymer modifier can comprise a hydrocarbon fluid such as PAO, Group III basestocks, or a gas-to-liquid hydrocarbon. A method for producing the plastic material is also provided. The plastic material has particular utility in the production of tubing, piping, and conduits for transporting gases, liquids, and the like, as well as wire and cable coatings such as jacketing and insulation.

US Patent:

8389616, Mar 5, 2013

Filed:

Feb 15, 2010

Appl. No.:

12/705835

Inventors:

Bruce A. Harrington - Houston TX, US
David B. Dunaway - Houston TX, US
Chon-Yie Lin - Houston TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08K 5/01

US Classification:

524474, 524490, 524491, 524521

Abstract:

This invention relates to a polymer composition comprising: 70 wt % to 99. 5 wt % of a nitrile-group containing elastomer, wherein the elastomer has: a Mooney Viscosity of 15 to 115 MU; and a nitrile monomer content of 0. 5 wt % to 50 wt %; and 0. 5 wt % to 30 wt % of a non-functionalized plasticizer (NFP), wherein the NFP has: a kinematic viscosity at 100 C. of 4 to 1000 cSt, a flash point of ≧200 C. , a viscosity index of ≧120, and a specific gravity of ≦0. 865; and wherein the composition has: a 25% compression set at 70 hours and −30 C. that is at least 110% of the 25% compression set of same composition without the NFP tested at the same conditions, and a retained tensile strength, in MPa, after 168 hours at 175 C. , that is at least about 88% of the retained tensile strength of the same composition that has not been aged.

US Patent:

8476360, Jul 2, 2013

Filed:

Mar 11, 2010

Appl. No.:

12/722292

Inventors:

Mun F. Tse - Seabrook TX, US
Bryan R. Chapman - Annandale NJ, US
David B. Dunaway - Houston TX, US
Bruce R. Lundmark - Akron OH, US
Bruce A. Harrington - Houston TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08L 23/00
B32B 27/32

US Classification:

524528, 428220

Abstract:

This invention relates to a film or sheet and a process to make a film or sheet having a thickness of 0. 5 to 35 mils comprising a blend composition comprising: a) 4 to 50 wt % of one or more polypropylene-based TPO(s); and b) 30 to 80 wt % of one or more ethylene plastomer(s); and c) 0. 5 to 35 wt % of one or more non-functionalized plasticizer(s) having a kinematic viscosity at 100 C. of 4 to 300 cSt, a pour point of −20 C. or less, and a flash point of 200 C. or more; and d) 0 to 69. 5 wt % of one or more filler(s); and wherein the blend composition is calendered into a film or sheet.

US Patent:

20090041820, Feb 12, 2009

Filed:

Aug 1, 2008

Appl. No.:

12/221278

Inventors:

Margaret M. Wu - Skillman NJ, US
Bruce R. Lundmark - Akron OH, US
Bryan R. Chapman - Annandale NJ, US
Hyun-Dae Jung - Singapore, SG
John Andres Harvey - Katy TX, US
Chia Yung Cheng - Seabrook TX, US
James Zielinski - Somerset NJ, US
William Grant Britton - Katy TX, US
David B. Dunaway - Houston TX, US

International Classification:

A01N 25/08
A61K 47/00
A61K 36/886
A61K 31/075
A61K 33/40
A61L 9/01
B29C 49/00
B05D 1/02
A61K 8/18
C11D 3/37
A61K 31/13
A61K 33/00
A61K 9/14

US Classification:

424409, 5147723, 424744, 514721, 424613, 514662, 424600, 424489, 510527, 523122, 252194, 512 8, 264572, 4274276

Abstract:

Functional polymer compositions and methods of forming such compositions are provided. The functional polymer compositions include at least 50 wt % of one or more polymer components; from 0.1 to 50 wt % of one or more fluids; and from 1 to 50 wt % of one or more active substrates. The combination of one or more fluids and one or more active substrates provides an article from such polymer composition with one or more special functional effects selected from moisturizing, anti-bacterial, disinfecting, anti-viral, anti-mildew, anti-mold, anti-fungal, anti-microbial, moisture/odor absorbing, fragrancing, insect repelling, anti-static and combinations thereof. The one or more fluids and one or more active substrates are released to the surface of polymer based articles. The functional polymer compositions are suitable for a wide range of end use applications including woven and non-woven fabrics.

US Patent:

20110111153, May 12, 2011

Filed:

Dec 31, 2010

Appl. No.:

12/983012

Inventors:

Robert G. Russell - Sulphur Springs TX, US
Rodney Mize - Cooper TX, US
Gary Lee Runyan - Plano TX, US
Bruce A. Harrington - Houston TX, US
Bryan R. Chapman - Annandale NJ, US
David B. Dunaway - Houston TX, US
Gerd Arthur Allermann - Overijse, BE

Assignee:

EXXONMOBIL CHEMICAL COMPANY INC. - Baytown TX
ZURN PEX, INC. - Commerce TX

International Classification:

B32B 1/08
C08L 23/04
C08K 5/14
C08K 5/54
C08L 51/06

US Classification:

428 369, 525240, 524528, 525 69, 524504

Abstract:

A method for producing a high strength, flexible crosslinked polyethylene (PEX) material is provided wherein the base polymer is intermixed with a polymer modifier which affects the amorphous region of the polymer, leaving the crystalline portion of the base polymer virtually unaffected. Consequently, the amorphous region's density is lowered, resulting in a more flexible final product, while the crosslinked molecular structure and/or crystalline portion of the polymer, which controls the strength of the base polymer, remains strong. The polymer modifier can comprise a hydrocarbon fluid such as PAO, Group III basestocks, or a gas-to-liquid hydrocarbon. The plastic material has particular utility in the production of tubing, piping, and conduits for transporting gases, liquids, and the like, as well as wire and cable coatings such as jacketing and insulation.