Richard Ming Wu

US Patent:

6353087, Mar 5, 2002

Filed:

Aug 17, 2000

Appl. No.:

09/641166

Inventors:

James Michael Lipovsky - Langhorne PA
Dawn Marie McFadden - Yardley PA
Richard Shu-Hua Wu - Fort Washington PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08J 300

US Classification:

528481, 528500

Abstract:

This invention relates to a process for stripping polymer reaction compositions. The process reduces gel in the polymer reaction composition by adjusting the pH of the polymer to from 7 to 11 prior to stripping and maintaining the adjusted pH during stripping, maintaining the temperature of the polymer at from 30Â C. to 70Â C. during stripping, utilizing a continuous stripping operation, or combinations thereof.

US Patent:

6515082, Feb 4, 2003

Filed:

May 3, 2000

Appl. No.:

09/564450

Inventors:

Jeffrey Lewis Brown - North Wales PA
Dennis Patrick Stack - Warrington PA
Richard Shu-Hua Wu - Fort Washington PA

Assignee:

Rohm And Haas Company - Philadelphia PA

International Classification:

C08F 216

US Classification:

526 64, 526200

Abstract:

This invention relates to a process for preparing polymers which contain as polymerized units hydrophobic monomers wherein a stable emulsion is formed and the formation of suspension particles is minimized. The process includes making a concentrated monomer emulsion, diluting the concentrated monomer emulsion with water, feeding the diluted monomer emulsion to a reactor, and polymerizing the monomer.

US Patent:

6723161, Apr 20, 2004

Filed:

Nov 18, 2002

Appl. No.:

10/298894

Inventors:

Eric Jon Langenmayr - Bryn Mawr PA
Richard Shu-Hua Wu - Fort Washington PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08K 500

US Classification:

106493, 106 316, 106412, 106478, 106494, 106495, 106496, 106497, 106498

Abstract:

A method for oxidizing an organic pigment including dispersing the pigment in an aqueous medium and exposing the dispersed pigment to ultrasonic radiation, whereby the exposed pigment exhibits from 3 to 10 microequivalents of carboxylic acid, or salts thereof, per square meter of pigment surface.

US Patent:

6896212, May 24, 2005

Filed:

Sep 4, 2003

Appl. No.:

10/655266

Inventors:

Vere Orland Archibald - North Wales PA, US
Richard Shu-Hua Wu - Fort Washington PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

B02C017/16

US Classification:

241 21, 241 29, 241184

Abstract:

A method of using polymeric grinding media to produce fine solid particles or fine solid dispersions in liquid, such as pigment dispersions for inks, is provided. The method of the present invention limits packing and plugging problems associated with polymeric media to allow efficient milling operation.

US Patent:

7025820, Apr 11, 2006

Filed:

Nov 3, 2003

Appl. No.:

10/700079

Inventors:

Tabb Robertson Champlin - Ambler PA, US
Stephen Andrew Crescimanno - Hatfield PA, US
Eric Jon Langenmayr - Bryn Mawr PA, US
Richard Shu-Hua Wu - Fort Washington PA, US

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C09D 11/00
C09C 1/22
C01F 7/02

US Classification:

106 319, 106 316, 106473, 106480, 423600

Abstract:

A method for forming an aqueous carbon black dispersion including providing a reaction mixture including carbon black having a DBP uptake of greater than 90 cc/100 g of the carbon black, a monovalent ion persulfate, an aqueous medium, and, in some embodiments, a strong acid; subjecting the reaction mixture to a first temperature of from 40 C. to 90 C. for from 2 hours to 24 hours; neutralizing the reaction mixture to a pH greater than 7. 0, and, in certain embodiments, subjecting the neutralized reaction mixture to a second temperature of from 20 C. to 40 C. higher than the first temperature for from 2 hours to 12 hours is provided. In an alternative aspect carbon black having a particle diameter less than 18 nanometers in diameter and a DBP uptake of less than 70 cc/100 g carbon black is provided. The aqueous carbon black dispersion so formed and an aqueous inkjet ink containing the aqueous carbon black dispersion are also provided.

US Patent:

20040143053, Jul 22, 2004

Filed:

Jan 7, 2004

Appl. No.:

10/752893

Inventors:

Richard Wu - Fort Washington PA, US
David Pierce - Warrington PA, US
Owen Hallerud - Mt. Laurel NJ, US

International Classification:

C08K003/00

US Classification:

524/556000

Abstract:

A method of preparing an emulsion polymer having a low residual monomer content, wherein the method includes the simultaneous addition of an oxidizing agent and a reducing agent to different locations on the process side of a heat exchanger is provided.

US Patent:

20120022928, Jan 26, 2012

Filed:

Jul 26, 2010

Appl. No.:

12/843248

Inventors:

Richard Wu - Brooklyn NY, US

International Classification:

G06Q 30/00
G01S 19/42

US Classification:

705 1412, 705 1458, 34235725

Abstract:

A system and method for virtual resource and location-based advertisement, including obtaining at least one advertisement including an offer including an exchange of virtual resources from at least one advertiser, obtaining at least one advertiser location of the at least one advertiser, receiving a user location and a selected keyword from a user, determining at least one selected offer associated with the selected keyword based on a distance between the user location and the at least one advertiser location, where the at least one selected offer includes an exchange of at least one selected virtual resource from at least one selected advertiser, and providing the at least one selected offer, the at least one selected advertiser associated with the at least one selected offer, and at least one selected advertiser location associated with the at least one selected advertiser to the user.

US Patent:

62520164, Jun 26, 2001

Filed:

Sep 8, 1999

Appl. No.:

9/391840

Inventors:

Richard Shu-Hua Wu - Fort Washington PA
Jill Ann Wudarski - Philadelphia PA
James Szkolnick Kempner - Southampton PA

Assignee:

Rohm and Haas Company - Phila. PA

International Classification:

C08F 201
C08F 204
C08F 212

US Classification:

526 64

Abstract:

A continuous process for preparing polymers is disclosed. The continuous process includes the steps of continuously feeding a reaction mixture containing a monomer into a non-cylindrical channel, continuously controlling the temperature of the non-cylindrical channel by exposing the surface of the non-cylindrical channel not exposed to the monomer to a temperature control medium, polymerizing the monomer in the non-cylindrical channel, and continuously removing the polymer from the non-cylindrical channel. The continuous process is suitable for the preparation of polymers containing ethylenically unsaturated monomers as polymerized units by emulsion polymerization, solution polymerization, and suspension polymerization.