Uniroyal Chemical Company, Inc.

Chemtura Corporation

Crompton Gmbh

Brigitte Benage

Gerald J Abruscato

Andrew J Eisenstein

Vilan Kosover

Brendan J Geelan

Istvan Lippai

Jesus A Fabian

Gan Wang

Jesus R Fabian

Anthony Vincent Gentile

Ruben S Grewal

Angela M Edwards

David J Sikora

Vilen Vilan Kosover

Kirk A Schlup

Vilen Kosover

Jesus Fabian

Leo Bonnell

Gerald J Abrucscato

A method for inhibiting the premature polymerization of styrenic monomers is disclosed wherein the method comprises adding to said monomers a combination of:

Means for controlling the exothermic reaction of styrenic monomers with sulfonic acids

A method for inhibiting the premature polymerization and the polymer growth of ethylenically unsaturated monomers is disclosed wherein the method comprises adding to said monomers an effective amount of at least one hydrogen donor or electron acceptor. In a preferred embodiment, the hydrogen donor or electron acceptor is used in combination with a stable nitroxyl free radical.

Composition and method for inhibiting polymerization and polymer growth

Disclosed herein is a method for inhibiting and retarding the premature polymerization and the polymer growth of vinyl aromatic monomers wherein the method comprises adding to said monomers an effective amount of an inhibitor and retarder blend comprising:

Aromatic sulfonic acids, amines and nitrophenols in combination with nitroxyl radical-containing compounds or C-nitrosoanilines as polymerization inhibitors

Aromatic sulfonic acids, amines, and nitrophenols in combination with nitroxyl radical-containing compounds or C-nitrosanilines as polymerization inhibitors

Disclosed herein is a method for inhibiting and retarding the premature polymerization and the polymer growth of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor that is a sulfonated nitrophenol of the formula: wherein: R, R, and Rare independently selected from the group consisting of hydrogen, alkyl, NO, and SOH, provided that at least one of R, R, and Ris NOand at least one of R, R, and Ris SOH. In a preferred embodiment, at least one additional inhibitor selected from the group consisting of nitroxyl compounds, nitrosoanilines, nitrophenols, amines, and mixtures thereof is also added.

Sulfonated nitrophenols as polymerization inhibitors

Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: Additionally, a composition is disclosed that comprises:

Blends of quinone alkide and nitroxyl compounds as polymerization inhibitors

Inhibitor blends that include both nitrosophenols and nitrosoanilines, optionally in combination with air or oxygen, reduce the premature polymerization of ethylenically unsaturated monomers. unsaturated monomers.

Nitrosophenols and C-nitrosoanilines as polymerization inhibitors

Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position. Additionally, a composition is disclosed that comprises: A) at least one nitroxyl compound, and B) at least one quinone alkide compound having an electron-withdrawing group at the 7-position.

Blends of quinone alkide and nitroxyl compounds and polymerization inhibitors

Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one inhibitor selected from the group consisting of C-nitrosoaniline and quinone imine oxime compounds. Also disclosed is a composition of matter comprising:

C-nitrosoaniline compounds and their blends as polymerization inhibitors

Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of: A) at least one first inhibitor selected from the group consisting of C-nitrosoaniline compounds; and B) at least one second inhibitor selected from the group consisting of quinone alkides, nitroaromatic compounds, hydroxylamine compounds, phenylenediamine compounds, quinone compounds, and hydroquinone compounds. Also disclosed is a composition of matter comprising: A) at least one member selected from the group consisting of C-nitrosoaniline compounds; and B) at least one member selected from the group consisting of quinone alkides, nitroaromatic compounds, hydroxylamine compounds, phenylenediamine compounds, quinone compounds, and hydroquinone compounds.

Growing community of inventors

Wolcott, CT, United States of America

Brigitte Benage