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The Waterborne Symposium

Environmentally Friendly Coating Technologies

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To administer the preeminent educational/technical forum in the United States directed to the science and technology of surface coatings and  to provide revenue to support and advance the School of Polymers and High Performance Materials at The University of Southern Mississippi.

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Paul Fithian - Use of Redox for the Main Polymerization of Emulsion Polymers

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Paul Fithian - Use of Redox for the Main Polymerization of Emulsion Polymers

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Paul Fithian
Regional Sales Manager
Brüggemann Chemical
610 353 9852
www.brueggemann.com


ABSTRACT

Redox reactions have been successfully used in emulsion polymerization to reduce free monomer after the main polymerization for decades.  New work will be presented on the benefits redox chemistry can bring when initiating the main polymerization as opposed to using a conventional thermal initiation.    

By utilizing redox chemistry in the main polymerization, lower polymerization temperatures are possible.  Work has also shown that the resulting polymers have lower free monomer than conventional thermal polymerizations prior to the monomer chase.  After utilizing a redox chase, the residual free monomer in the redox initiated reaction is more than ten times less than the product which used a thermal initiation for the main reaction. 

The ability to start the polymerization at lower temperature and allowing the reaction to heat adiabatically may also offer shorter cycle times and cleaner reactions.  It is also expected that the lower temperature polymerization will result in a more linear, higher molecular weight emulsion polymer which should give improved performance. 

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