Marketing and Sales Director
Bob attained his Ph.D. at University of Delaware, and went on to do two post-doctoral fellowships at Indiana and Pennsylvania State Universities. He joined Union Carbide’s Silicones in 1989 as a Research Chemist. For over 30 years, Bob has worked in silicones R&D and marketing, joining Siltech in 2009 he is now the Global Marketing and Sales Director.
Organofunctional silanes have long been used as surface treatments, adhesion promoters, dispersants or for crosslinking in condensation-cured systems. These monomeric materials are generically represented by (R1O)3Si-R2. The R1 alkoxy groups are often methyl but ethyl, propyl and other alcohols are used and have the effect of slowing down the reaction and liberating less toxic alcohols. The R2 group is varied quite a bit more. Alkyl groups such as methyl or octyl are commonly used as surface treatments providing water repellency or particle dispersion. Water-soluble groups such as polyalkyleneoxide provide sheeting or particle dispersion in aqueous systems. Research in the 90’s focused on increasingly more complex R2 groups, which quite often performed great in the lab but were not always cost-effective. In many cases, the improved properties could also be achieved with high levels of standard organofunctional silanes at less cost. In this presentation, we describe a simple direction that these silanes have evolved over the years and the products that have come from that path. The trialkoxy silane moieties are directly appended to silicone polymers forming a chemical chimera of both species.