Redox system and process
AssigneeRohm and Haas Company
InventorsSteven Michael Baxter, Patrick Albert Clark
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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.
Claims14
A redox initiator system for reducing residual monomer content in an aqueous emulsion polymer containing one or more ethylenically unsaturated monomers, which comprises at least one oxidant, at least one reductant and at least one metal promoter complex, wherein the metal promoter complex comprises at least one soluble metal salt and one or more chelating ligands having fewer than six metal coordinating groups.
A process for preparing an aqueous emulsion polymer comprising providing one or more ethylenically unsaturated monomers and a free radical redox initiator system under emulsion polymerization conditions, the redox intiator system comprising at least one oxidant, at least one reductant and at least one metal promoter complex, the metal promoter complex further comprising at least one soluble metal salt and one or more chelating ligands having fewer than six metal coordinating groups;
- and effecting the polymerization of at least some of said ethylenically unsaturated monomer.
A process for reducing the residual ethylencially unsaturated monomer content of an aqueous emulsion polymer comprising contacting said emulsion polymer with a free radical redox initiator system, wherein the redox initiator system comprises at least one oxidant, at least one reductant and at least one metal promoter complex, the metal promoter complex further comprising at least one soluble metal salt and one or more chelating ligands having fewer than six metal coordinating groups;
- and effecting the polymerization of at least some of the residual ethylenically unsaturated monomer.
Dependencies are inferred from the claim text.