Rohm and Haas Company

Shipley Company LLC

Rohn and Haas Company

Robert Mitchell Blankenship

James Keith Bardman

Alexander Kowalski

Martin Vogel

John Michael Friel

Robert H Gore

Ronald W Novak

Angelo Anthony Lamola

Clarence J Neyhart

Michael K Gallagher

William Christopher Finch

Barrett Richard Bobsein

Yujian You

Scott Lind Egolf

Joseph J Wilczynski

Craig S Allen

Lifeng Zhang

Nikoi Annan

Anne Denise Koller

Ralph Craig Even

Curtis Alan Schwartz

Dennis Paul Lorah

Mark Robert Winkle

Robert Victor Slone

Warren Harvey Machleder

Wayne Devonport

Frederick James Schindler

Richard Roy Clikeman

Patricia Marie Lesko

Chuen-Shyong Chou

James Watson Neely

Gary William Dombrowski

Eric Jon Langenmayr

David William Whitman

Ronald Scott Beckley

George H Redlich

Shang-Jaw Chiou

Rosemarie Palmer Lauer

Anton Georges El A'mma

Albert Benner Brown

Susan Jane Fitzwater

James Tinney Brown

Barbara Jean Schultz

Lubomir Mlynar

Cheun-Shyong Chou

An aqueous dispersion of polymeric particles and process for forming thereof is provided. The particles comprise a first polymer comprising, when dry, at least one void; and, substantially encapsulating the first polymer, at least one second polymer comprising, as polymerized units, at least one ethylenically unsaturated monomer.

Aqueous dispersion of polymeric particles

An organic-inorganic composite particle containing an inorganic particle having a plurality of polymer particles attached to the inorganic particle and a polymer layer encapsulating the attached polymer particles. A process is provided for the organic-inorganic composite particle. The organic-inorganic composite particle is useful in the preparation of dried coatings that have improved hiding, whiteness, or gloss.

Organic-inorganic composite particle and process for preparation thereof

An aqueous dispersion of polymeric particles, the particles including: from 5% to 80% by weight, based on the weight of the polymeric particles, of a first polymer including at least one copolymerized ethylenically unsaturated monomer; and, substantially encapsulating the first polymer, from 20% to 95% by weight, based on the weight of the polymeric particles, of a second polymer including at least one copolymerized ethylenically unsaturated monomer, the second polymer having a Tg of from &#x2212;40&#xb0; C. to 30&#xb0; C., wherein at least 90 weight % of the second polymer is formed by polymerization at a temperature of from 5&#xb0; C. to 65&#xb0; C. is provided. The invention also relates to a process for forming the aqueous dispersion of polymeric particles and an aqueous coating composition including the aqueous dispersion of polymer particles, a method for providing a coated substrate, and the coated substrate so provided.

An aqueous polymer emulsion comprising water and swollen multi-stage polymer is provided. The swollen multi-stage polymer has low dry bulk density, as measured by centrifugation. To achieve the low dry bulk density, the polymer is highly swollen in such a way that it does not subsequently collapse. The polymer is useful in paint and paper coatings.

Process for preparing polymer emulsions and polymers formed therefrom

The present invention relates to a process for preparing an aqueous polymer dispersion containing polymer particles dispersed in an aqueous medium. The process includes providing first polymer particles; adding a hydrophobic polymerization blocker or a styrenic monomer polymerization blocker to the aqueous medium containing the first polymer particles; and preparing second polymer particles in the presence of the first polymer particles. The aqueous polymer dispersion contain first polymer particles and the second polymer that differ according to at least one attribute such as particle diameter, molecular weight, composition, glass transition temperature, or morphology; or contain polymer particles having a broad polydispersity. The aqueous polymer dispersion prepared by the process of this invention is useful in a wide range of applications, including paints, adhesive, binders for nonwovens, and binders for paper coatings.

Aqueous polymerization process for preparing an aqueous polymer dispersion

An aqueous dispersion of polymeric particles and process for forming thereof is provided. The particles comprise a first polymer comprising, as polymerized units, at least one monoethylenically unsaturated monomer and at least one multi-ethylenically unsaturated monomer and when dry, at least one void; and at least one second polymer, substantially encapsulating the first polymer, comprising, as polymerized units, at least one ethylenically unsaturated monomer.

Nonionic associative thickeners are provided having a nonionic water soluble polymer backbone containing vinyl addition polymer. The nonionic water soluble polymer backbone has at least two pendant polymeric chains attached to the nonionic water soluble polymer backbone. The pendant polymeric chains have terminal chain segments containing polyoxypropylene units. The nonionic associative thickeners are useful for modifying the rheology of compositions including aqueous compositions, such as latex containing compositions.

Nonionic associative thickener containing vinyl addition polymer backbone

Swollen multi-stage emulsion polymers with low dry bulk densities

Nonionic associative thickeners are provided having a nonionic water soluble polymer backbone with at least two pendant polymeric chains attached to the nonionic water soluble polymer backbone. The pendant polymeric chains have terminal chain segments containing polyoxyalkylene units comprising 3 to 6 carbon atoms. The nonionic associative thickeners are useful for modifying the rheology of compositions including aqueous compositions, such as latex containing compositions.

Nonionic associative thickener containing condensation polymer backbone

Provided are improved coatings, polymeric dispersions, and polymeric composites, which include crosslinked polymeric nanoparticles (hereafter 'PNPs'). Also provided are methods for forming improved coatings, polymeric dispersions, and polymeric composites, which include PNPs. The PNPs have polymerized units of at least one multi-ethylenically-unsaturated monomer have a mean diameter of from 1 to 50 nanometers. PNPs having polymerized units of at least one multi-ethylenically-unsaturated monomer and at least one surface-active monomer are also provided.

Coating and coating composition

A method of forming, by polymerization in an aqueous dispersion at pressures in excess of one atmosphere, a plurality of porous particles having at least one polymeric phase and at least one pore filling phase, wherein the pore filling phase includes a pore filler and a fugitive substance, is disclosed. Replacement of the fugitive substance with a replacement gas is further disclosed. Porous particles having a polymeric phase and pores containing a pore filler, and, optionally, a gaseous phase are also disclosed, as are their aqueous dispersions.

Porous particles, their aqueous dispersions, and method of preparation

Disclosed is a method of preparing emulsion polymers and a method of preparing porous dielectric materials using the emulsion polymers.

Polymer synthesis

Processes for chemically-modifying the surface of an emulsion polymer particle are provided which include providing an aqueous emulsion polymer, a monomer at a level of at least 0.5% by weight based on the weight of the emulsion polymer and a, surface-modifying chemical capable of bonding with the monomer, under conditions where there is no substantial polymerization of the monomer, and then reducing the level of the monomer by at least 50%.

Processes for chemically-modifying the surface of emulsion polymer particles

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Harleysville, PA, United States of America

Robert Mitchell Blankenship