Richard C Wu

6353087, Mar 5, 2002

Aug 17, 2000

09/641166

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

Rohm and Haas Company - Philadelphia PA

C08J 300

528481, 528500

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.

6515082, Feb 4, 2003

May 3, 2000

09/564450

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

Rohm And Haas Company - Philadelphia PA

C08F 216

526 64, 526200

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.

6723161, Apr 20, 2004

Nov 18, 2002

10/298894

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

Rohm and Haas Company - Philadelphia PA

C08K 500

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

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.

6896212, May 24, 2005

Sep 4, 2003

10/655266

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

Rohm and Haas Company - Philadelphia PA

B02C017/16

241 21, 241 29, 241184

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.

7025820, Apr 11, 2006

Nov 3, 2003

10/700079

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

Rohm and Haas Company - Philadelphia PA

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

106 319, 106 316, 106473, 106480, 423600

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.

8132447, Mar 13, 2012

Apr 9, 2010

12/798713

Shaoming Wu - Thousand Oaks CA, US
Richard Wu - Thousand Oaks CA, US

G01N 3/48
G01N 3/42
G01N 3/00

73 81, 73796

A testing machine includes a stand and a test device. The stand includes a base, box frame, a slide device driven to slide by a motor, and a control system controls the force applied on the test specimen. The test device is coupled at the slide device for performing various hardness tests consisting of Rockwell hardness test, Vickers hardness test, Brinell hardness test, micro-hardness test, and tension-compression test. The test device includes a force sensor and a data processing circuit converting an analog signal of the force sensor into digital data to interface with the control system.

20040143053, Jul 22, 2004

Jan 7, 2004

10/752893

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

C08K003/00

524/556000

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.

20050197418, Sep 8, 2005

Feb 4, 2005

11/051380

Louis Graziano - Doylestown PA, US
Richard Wu - Fort Washington PA, US

C08K003/00

522074000

A polymer composition which is crosslinked and insoluble in radiation curable monomers, prepolymers, oligomers, and mixtures thereof, is suitable for formulation into radiation curable compositions, for example, as binders for formulation in radiation curable ink jet ink compositions. Such crosslinked, insoluble polymer compositions impart improved application and curing characteristics to ink jet ink compositions without loss of acceptable jettability characteristics. The polymer composition may be blended with radiation curable monomers, prepolymers, oligomers, or mixtures thereof, to form a radiation curable binder blend for formulation into a radiation curable ink jet ink composition. A radiation curable ink jet ink composition including at least one crosslinked, insoluble polymer binder composition, a liquid medium and a colorant is also provided.