GERMANY-based chemicals company Wacker Chemie A.G has developed a tin-free catalyst for two-part, room temperature-curing silicone rubber grades designed for encapsulation and mould-making applications.
Elastosil Catalyst NEO is developed for use with the condensation-curing base components of Elastosil M rubber grades. The Mould-making compounds catalysed with Elastosil Catalyst can be processed normally and possess the same mechanical properties as traditionally cured compounds.
The catalyst is also a practical alternative to conventional tin-based catalysts, Wacker said.
The formulation of the new catalyst can provide a sufficiently long pot life for making moulds of large objects, as well as ensure that the compounds cure within 24 hours, Wacker said, adding that they are ideal for making moulds for technical items, objects of art and archaeological artifacts – with the silicone rubber forming the negative mold of the item being reproduced. (RJA)
Asia's First E-Magazine for the Rubber Industry