Patrick C Clark

US Patent:

6713557, Mar 30, 2004

Filed:

Nov 20, 2001

Appl. No.:

09/990038

Inventors:

Steven Michael Baxter - Chalfont PA
Patrick Albert Clark - Valley Forge PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08F 216

US Classification:

524804, 502300, 5262196, 526229, 526 93, 526 94, 526230

Abstract:

A process for preparing an aqueous emulsion polymer including providing at least one ethylenically unsaturated monomer and a free radical redox initiator system under emulsion polymerization conditions, the redox initiator system including an oxidant; a reductant and a metal promoter complex, and effecting the polymerization of at least some of the ethylenically unsaturated monomer is provided. Also provided is a process for reducing the residual ethylenically unsaturated monomer content of an aqueous emulsion polymer.

US Patent:

6812309, Nov 2, 2004

Filed:

Dec 16, 2002

Appl. No.:

10/320232

Inventors:

Patrick Albert Clark - Valley Forge PA

Assignee:

Rohm and Haas Company - Philadelphia PA

International Classification:

C08F22022

US Classification:

526245, 526242, 526264, 526280, 5262921, 5262926, 526293, 526319, 526347, 526284

Abstract:

A method for encoding a polymer. The method comprises incorporating, into a polymer formed by polymerizing at least one bulk monomer, from 0. 1 ppm to 1% each of at least two additional monomer residues.

US Patent:

20020148288, Oct 17, 2002

Filed:

Jan 10, 2002

Appl. No.:

10/043762

Inventors:

Patrick Clark - Valley Forge PA, US
Kristin Weidemaier - Yardley PA, US

International Classification:

G01N017/00
G01B021/08

US Classification:

073/15000R

Abstract:

A method for predicting the outdoor durability of a first coating relative to the outdoor durability of at least one other of a set of coatings, all of the coatings having been formed from aqueous coating compositions comprising a thermoplastic emulsion polymer, particularly a predominantly acrylic thermoplastic emulsion polymer, and, optionally, a pigment, comprising exposing the set of coatings to the same ambient outdoor conditions for the same period of time, subjecting the exposed coatings to a chemiluminescence test, and comparing the result of said chemiluminescence test performed on the first coating to the corresponding result for at least one other of the set of coatings.