Yu Fen Wang

US Patent:

6545101, Apr 8, 2003

Filed:

Feb 6, 2001

Appl. No.:

09/777398

Inventors:

Pawan Kumar Agarwal - Houston TX
Hsien-Chang Wang - Bellaire TX
Yu Feng Wang - Houston TX
Jean M. J. Frechet - Oakland CA
Shah A. Haque - Houston TX

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08F 1000

US Classification:

5253337, 525337, 525366, 525403, 525409, 5263486, 5263487, 528372, 528402

Abstract:

Polyisobutylene (PIB) functionalized with terminal reactive unsaturation is disclosed. Carbocationically polymerized monohalogen-terminated PIB is dehydrohalogenated in a hydrocarbon solvent using an alkoxide of the formula RO-M wherein R is alkyl of at least 5 carbon atoms and M is alkali metal. The PIB obtained has terminal unsaturation which is 100% in the reactive âexoâ form which can be converted to succinic anhydride groups (PIB-SA) by the ene reaction with maleic anhydride. The PIB-SA is reactive with amine functional dendrimers to obtain a star-branched polymer having a dendrimer core and PIB branches joined by succinimide linkages. Blends of the star-branched polymer with polypropylene have improved energy absorption properties and controllable moisture/oxygen permeabilities useful in films.

US Patent:

7858735, Dec 28, 2010

Filed:

May 29, 2009

Appl. No.:

12/475034

Inventors:

Richard C. Yeh - Bellaire TX, US
Yu Feng Wang - Houston TX, US
Jean-Paul Swoboda - Grandcamp, FR

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08F 6/00
C08J 3/00

US Classification:

528481, 523334, 523335, 524495

Abstract:

In the production of elastomers the product obtained from the polymerization process is often in the form of a slurry. Described herein are an apparatus and a process for “finishing” the elastomer, i. e. , dewatering and drying the elastomer. The process comprises the steps of obtaining a slurry comprising water and elastomer; passing the slurry through a first dewatering device to produce a wet elastomer crumb, wherein the first dewatering device comprises two dewatering extruders in parallel; passing the wet elastomer crumb through a second dewatering device; and then passing the wet elastomer crumb through a drying device to produce a dried elastomer crumb.

US Patent:

8524859, Sep 3, 2013

Filed:

Mar 23, 2011

Appl. No.:

13/070078

Inventors:

Yu Feng Wang - Houston TX, US
Richard C-M Yeh - Houston TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08F 6/00

US Classification:

528502F, 528480, 528497, 528502 R, 528503, 422258, 422259, 422260, 422608, 202175, 202216, 202238, 202265, 526 71, 526 72, 526335, 526348, 5263487

Abstract:

In the production of isobutylene-based elastomers the product obtained from the polymerization process is often in the form of a stream. Described herein are an apparatus and a process for removal of hydrocarbon liquids from the elastomer. The process comprises the steps of obtaining a stream comprising hydrocarbon liquids, either solvents or diluents, and an isobutylene-based elastomer; passing the stream through a kneader to volatize the hydrocarbon liquids from the elastomer.

US Patent:

20030050433, Mar 13, 2003

Filed:

Oct 23, 2002

Appl. No.:

10/278310

Inventors:

Pawan Agarwal - Houston TX, US
Hsien-Chang Wang - Bellaire TX, US
Yu Wang - Houston TX, US
Jean Frechet - Oakland CA, US
Shah Haque - Houston TX, US

International Classification:

C08G073/00

US Classification:

528/363000, 525/387000, 525/314000, 524/252000, 526/314000, 526/333000

Abstract:

Polyisobutylene (PIB) functionalized with terminal reactive unsaturation is disclosed. Carbocationically polymerized monohalogen-terminated PIB is dehydrohalogenated in a hydrocarbon solvent using an alkoxide of the formula RO-M wherein R is alkyl of at least 5 carbon atoms and M is alkali metal. The PIB obtained has terminal unsaturation which is 100% in the reactive ‘exo’ form which can be converted to succinic anhydride groups (PIB-SA) by the ene reaction with maleic anhydride. The PIB-SA is reactive with amine functional dendrimers to obtain a star-branched polymer having a dendrimer core and PIB branches joined by succinimide linkages. Blends of the star-branched polymer with polypropylene have improved energy absorption properties and controllable moisture/oxygen permeabilities useful in films.

US Patent:

20050171077, Aug 4, 2005

Filed:

Jan 28, 2005

Appl. No.:

11/045435

Inventors:

Mark Ruppen - Garnerville NY, US
Yu Wang - Demarest NJ, US
Sam George - Wayne NJ, US

Assignee:

Wyeth - Madison NJ

International Classification:

A61K031/43
A61K031/407

US Classification:

514192000, 514210090

Abstract:

The invention pertains to pharmaceutical compositions of Zosyn having substantially free or reduced levels of galactomannan and processes to prepare said pharmaceutical compositions.

US Patent:

20100012846, Jan 21, 2010

Filed:

Jul 30, 2008

Appl. No.:

12/518869

Inventors:

Yu Wang - Pearland TX, US

Assignee:

YU WANG - Pearland TX

International Classification:

G01T 1/161
G01T 1/20

US Classification:

250362, 250366, 25036304

Abstract:

A gamma ray detector module includes at least one scintillation detector configured to operate in a dot-decoding mode, or at least two scintillation detectors configured to operate in a line-decoding mode, wherein the at least one scintillation detector is each coupled to a single photodetector, and wherein the at least two scintillation detectors are coupled to at least two photodetectors arranged substantially along a line; and at least four scintillation detectors configured to operate in a plane-decoding mode, wherein the at least four scintillation detectors are coupled to a plurality of photodetectors arranged in a two-dimensional array.

US Patent:

20110162751, Jul 7, 2011

Filed:

Dec 1, 2010

Appl. No.:

12/958203

Inventors:

Brian Joseph Fitzgerald - Kingwood TX, US
Hyun-Woo Jin - Easton PA, US
Raghavan Ayer - Bridgewater NJ, US
Yu Feng Wang - Houston TX, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

F16L 9/14
B05D 1/36
B05D 3/02
B05D 5/00
B05D 7/00
C25D 3/56
C25D 7/04
C25D 9/00
B82Y 30/00

US Classification:

138145, 427256, 205238, 205318, 205316, 977734

Abstract:

Provided are coated petrochemical and chemical industry devices and methods of making and using such coated devices. In one form, the coated petrochemical and chemical industry device includes a petrochemical and chemical industry device including one or more bodies, and a coating on at least a portion of the one or more bodies, wherein the coating is chosen from an amorphous alloy, a heat-treated electroless or electro plated based nickel-phosphorous composite with a phosphorous content greater than 12 wt %, graphite, MoS, WS, a fullerene based composite, a boride based cermet, a quasicrystalline material, a diamond based material, diamond-like-carbon (DLC), boron nitride, and combinations thereof. The coated petrochemical and chemical industry devices may provide for reduced friction, wear, corrosion and other properties required for superior performance.

US Patent:

20120319318, Dec 20, 2012

Filed:

May 8, 2012

Appl. No.:

13/466182

Inventors:

Yu F. Wang - Houston TX, US
Cynthia A. Mitchell - Houston TX, US
Lisa B.V. Venditte - Houston TX, US
George Rodriguez - Houston TX, US
Sudhin Datta - Houston TX, US

International Classification:

B29C 47/76

US Classification:

264101, 4253021, 425 67

Abstract:

Methods and systems for pelletizing low molecular weight semi-crystalline polymers are provided herein. Polymer compositions comprising the semi-crystalline polymer and a solvent are provided to a devolatilizing device, where the solvent is at least partially evaporated under vacuum conditions, resulting in removal of heat from the polymer by evaporative cooling and crystallization of the polymer. Once the polymer has reached the desired temperature, the polymer exits the devolatilizer and is pelletized. Semi-crystalline polymers that may be used in the present invention include propylene-based copolymers, such as propylene-ethylene and propylene-hexene copolymers having a heat of fusion, Hf, from about 5 to about 75 J/g and a weight average molecular weight, Mw, from about 10,000 to about 200,000 g/mol.

Author:

Yu San Wang

ISBN #:

0275900460

Author:

Yu S. Wang

ISBN #:

0275934713

Author:

Yu Michael Wang

ISBN #:

0791835138