The Goodyear & Tire Rubber Company

Dane Kenton Parker

Howard Allen Colvin

Frank James Feher

Viswanath Mahadevan

Kirkwood S Cottman

Gerald Owen Schulz

Xiaoping Yang

Arthur H Weinstein

Richard T Musleve

Martin Paul Cohen

Joseph John Kulig

Robert Charles Hirst

Robert F Roberts

James R Purdon, Jr

David M Ruthenburg

Wen-Liang Hsu

Neil Arthur Maly

Robert W Strozier

Michael Leslie Senyek

Donald J Burlett

Dennis B Patterson

Joel Muse

Joseph Frank Geiser

Richard J Kurr

Lawson G Wideman

Richard Michael D'Sidocky

Thierry Florent Edme Materne

Richard G Bauer

Eric Sean Castner

Robert A Smith

Kenneth Floyd Castner

Gary Lee Burroway

Richard H Kline

Lewis Timothy Lukich

Joseph A Kuczkowski

Roger J Hopper

Manoj Ajbani

William Paul Francik

James Gregory Gillick

Budd H Sturm

Mark S Sinsky

Michael E Kimball

Cheryl Ann Losey

Lei Zheng

Timothy A Sabo

Carl R Parks

Steven Wayne Cronin

James W Hershberger

Judy Chu

Richard A Marshall

Robert Donald Mate

Brent Kevin Larson

Scott Edwards Johnson

John Thomas Lean

Derek Shuttleworth

Cigdem Gurer

Niranjan Shah

Fran&ccedil;ois Jean-Marie Breton

Muhanad A Alsamarraie

Penelope R Pappas

Richard J Steichen

Donald O Nickey

Lloyd D Hess, Jr

James C Blackwell

The diimide hydrogenation of unsaturated elastomers in latex utilizing hydrazine and hydrogen peroxide or oxygen, is a metal-catalyzed process. Copper ion has been found to be the most superior catalyst for this reaction, requiring an extremely low concentration for optimal results. Generated diimide efficiently hydrogenates the polymer olefinic unsaturation while generating water and nitrogen as byproducts. With a falling hydrazine concentration during the hydrogenation process however, a competing copper-catalyzed process capable of generating hydroxyl, superoxide and/or copper-oxyl radicals becomes increasingly competitive. The ability of these radical species to abstract hydrogen from the polymer backbone to generate polymeric radicals, ultimately results in crosslinking that occurs concurrently with hydrogenation. The concept of an OH radical inactivating ligand (OIL) complexed with copper is demonstrated to ameliorate the crosslinking reaction.

Method for the diimide hydrogenation of emulsified unsaturated polymers

The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium. The subject invention more specifically reveals an emulsion polymerization process that comprises: (1) preparing a monomer solution which is comprised of (a) at least one monomer, (b) a conjugate acid of a surfactant with a pKof less than 14, and (c) a controlled free radical polymerization agent; (2) preparing an aqueous medium which is comprised of (a) water, and (b) a conjugate base of a weak acid wherein the pKof the base is less than 14; and (3) mixing the monomer solution with the aqueous medium under conditions that result in the in-situ formation of an emulsifier, and (4) initiating free radical polymerization.

Controlled polymerization

The present invention discloses a process for synthesizing a hydrogenated polymer that comprises: (1) preparing a aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; (2) initiating polymerization of said monomer within the aqueous polymerization medium to produce a latex of an unsaturated polymer; (3) treating the latex of the unsaturated polymer with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from the group consisting of hydrazine and hydrates of hydrazine; and (c) a metal ion activator to produce the hydrogenated polymer.

Hydrogenation and epoxidation of polymers made by controlled polymerization

A process of preparing a nanocomposite comprised of an elastomer and at least partially exfoliated, intercalated water-swellable clay.

Process for production of clay nanocomposite

The present invention is directed to a method of producing an amphiphilic block copolymer, including the steps of:

Surfactantless synthesis of amphiphilic cationic block copolymers

This invention relates to an aqueous based process for the preparation of intercalated and/or exfoliated natural or synthetic clays using block copolymers in latex form containing at least one non-polar block and one or more cationic blocks, wherein the block copolymers are prepared by an emulsion controlled free radical polymerization method.

Water-based process for the preparation of polymer-clay nanocomposites

The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium. The subject invention more specifically reveals an emulsion polymerization process that comprises: (1) preparing a monomer solution which is comprised of (a) at least one monomer, (b) a conjugate acid of a surfactant with a pKof less than 14, and (c) a controlled free radical polymerization agent; (2) preparing an aqueous medium which is comprised of (a) water, and (b) a conjugate base of a weak acid wherein the pKof the base is less than 14; and (3) mixing the monomer solution with the aqueous medium under conditions that result in the in-situ formation of an emulsifier, and (4) initiating free radical polymerization. This technique can be used to synthesize unique block polymers, such as a block polymer which is comprised of an A block and a B block, wherein the A block is a polymer block which is comprised of a vinyl aromatic monomer and wherein the B block is a polymer block which is comprised of (a) at least one monomer selected from the group consisting of acrylonitrile and methacrylonitrile and (b) a conjugated diolefin monomer, such as 1,3-butadiene or isoprene.

Styrene acrylonitrile isoprene triblock copolymer

The present invention discloses a process for synthesizing a hydrogenated polymer that comprises: (1) preparing a aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; (2) initiating polymerization of said monomer within the aqueous polymerization medium to produce a latex of an unsaturated polymer; (3) treating the latex of the unsaturated polymer with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from the group consisting of hydrazine and hydrates of hydrazine; and (c) a metal ion activator to produce the hydrogenated polymer. The present invention further discloses a process for synthesizing a hydrogenated polymer that comprises: (1) preparing a monomer solution which is comprised of (a) at least one monomer, (b) a conjugate acid of a surfactant with a pKof less than about 14, and (c) a controlled free radical polymerization agent; (2) preparing an aqueous medium which is comprised of (a) water, and (b) a conjugate base of a weak acid wherein the pKof the base is less than about 14; and (3) mixing the monomer solution with the aqueous medium under conditions that result in the in-situ formation of an emulsifier; (4) initiating free radical polymerization to produce a latex of an unsaturated polymer; and (5) treating the latex of the unsaturated polymer with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from the group consisting of hydrazine and hydrates of hydrazine; and (c) a metal ion activator to produce the hydrogenated polymer.

This invention discloses a process for producing a polymer by controlled polymerization which comprises polymerizing at least one monomer in the presence of a free radical control agent of the structural formula: (Z)-(R), wherein n represents an integer from 1 to about 6; wherein Z represents an aromatic or aliphatic moiety containing from 1 to about 20 carbon atoms; wherein Rrepresents a moiety of the structural formula: wherein Rrepresents a moiety selected from the group consisting of alkyl groups, alkenyl groups, alkynyl groups, aryl groups, heteroaryl groups, and alkaryl groups; wherein the alky groups, alkenyl groups, alkynyl groups, aryl groups, heteroaryl groups, and alkaryl groups can be substituted, unsubstituted, linear, branched or cyclic; and wherein Ar represents a p-alkoxyphenyl group having an alkoxy moiety that contains from 1 to 8 carbon atoms.

Oxathiazaphospholidine free radical control agent

This invention relates to a tire which is comprised of a generally toroidal-shaped carcass with an outer circumferential tread, two spaced beads, at least one ply extending from bead to bead and sidewalls extending radially from and connecting said tread to said beads, wherein said tread is adapted to be ground-contacting, and wherein said tread is a cured the rubber formulation which is comprised of (1) hydroxylamine end-group functionalized rubbery polymer of the structural formula: wherein P represents polymer chains of the rubbery polymer, and wherein (i) Rand Rare independently selected from the group consisting of substituted or unsubstituted straight, branched, or cyclic alkylgroups, alkenyl groups, alkynyl groups, aryl groups, heteroaryl groups, alkaryl groups, alkoxyl groups, halo-alkyl groups, and combinations thereof; or (ii) Rand Rtaken together with the carbon and nitrogen to which they are attached form a 5 to 8 membered ring; and (2) a filler selected from the group consisting of carbon black and silica.

Functionalization of living rubbery polymers with nitrones

The present invention is directed to a process for synthesizing an epoxidized polymer that includes the steps of:

Epoxidation of unsaturated cationically stabilized polymer latex

The present invention discloses a process for producing a core-shell polymer that comprises: (1) preparing a monomer solution which is comprised of (a) at least one monomer, optional one crosslinking monomer (b) a conjugate acid of a surfactant with a pKa of less than 14, and (c) a controlled free radical polymerization agent; (2) preparing an aqueous medium which is comprised of (a) water, and (b) a conjugate base of a weak acid wherein the pKb of the base is less than 14; and (3) mixing the monomer solution with the aqueous medium under conditions that result in the in-situ formation of an emulsifier to produce a polymerization medium, and (4) initiating free radical polymerization within the polymerization medium to produce a core polymer, wherein the core contains a free radical control agents, (5) adding a second monomer to the polymerization medium containing the core polymer, and (6) allowing polymerization to proceed in the presence of the free radical control agent to produce the core-shell polymer.

Core-shell particles synthesized through controlled free radical polymerization

This invention discloses a process for producing a polymer by controlled polymerization which comprises polymerizing at least one monomer in the presence of a free radical controi agent of the stxuctural formula: (Z)-(R), wherein n represents an integer from 1 to about 6; wherein Z represents an aromatic or aliphatic moiety containing from 1 to about 20 carbon atoms; wherein Rrepresents a moiety of the structural formula: wherein Rrepresents a moiety selected from the group consisting of alkyl groups, alkenyl groups, alkynyl groups, aryl groups. heteroaryl groups, and alkaryl groups; wherein the alky groups, alkenyl groups, alkynyl groups, aryl groups, heteroaryl groups, and alkaryl groups can be substituted, unsubstituted, linear, branched or cyclic; and wherein Ar represents a p-alkoxyphenyl group having an alkoxy moiety that contains from 1 to 8 carbon atoms.

Growing community of inventors

Massillon, OH, United States of America

Dane Kenton Parker