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Gregory J. Brust

Lion Elastomers
Scientist – Trilene Applications nDevelopment
Liquid EPDM for Waterborne Coatings
Low molecular weight, liquid ethylene propylene diene rubber (L-EPDM) has been known in the industry for many years. Common applications include rubber goods, oil additives, and adhesives. More recently these elastomers have found utility in liquid applied roof coatings. These resins, formulated into solvent-based liquid coatings, may be cured with peroxide or UV radiation and are often used as maintenance coatings for flat or low slope roofs. However, adoption into many markets is limited by the high solvent content required. Recently, a waterborne suspension of L-EPDM has been developed. This material can easily be formulated into a water-based coating and is curable with metal driers (1K), or peroxides (2K) and/or UV radiation. The suspension can be used alone or with other resins, or may be used as an additive to improve the properties of formulations. Properties of cured coatings made from the waterborne L-EPDM are similar to those of their solvent borne counterparts. This paper will discuss L-EPDM waterborne suspension properties, coating formulation, application and curing methods, and final film

Greg Brust is a graduate of the University of Southern Mississippi School of Polymers and High Performance Materials, where he was co-author of the Macrogalleria and the Story of Rubber, online polymer science educational resources. After working as a professor for several years in New York and Mississippi, he joined Hybrid Plastics in 2008 and became an expert in the use of Polyhedral Oligomeric Silsesquioxane (POSS) materials in coatings, thermosets and thermoplastics. Greg is now the Scientist for Trilene Applications Development at Lion Elastomers, where his primary focus is on coatings, adhesives and sealants made with liquid EPDM rubber and eSBR latex.

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