Karstedt catalyst fast cure Product name 1% Pt as Karstedt in 1000 cS vinyl terminated polydimethylsiloxane Chemical formula Pt2(1,1,3,3-tetramethyl-1, 3-divinyldisiloxane)3 This catalyst is a solution of Karstedt catalyst in 1000 cS vinyl terminated polydimethylsiloxane. It is used to cross-link silicone polymers in two-part RTV addition-cure silicone systems. Karstedt catalyst promotes a quick, low temperature cure in the formation of silicone elastomers. Johnson Matthey can provide formulations to meet specific requirements for activity, stability and viscosity. Product code* US - C1219F * This product can be ordered worldwide under the US product code. CAS Number 68478-92-2 Product family Pgm compound solution (organic) Process Hydrosilylation Market Silicones Literature references US3775452 Karstedt et al. US4288345 Ashby et al. www.chemicals.matthey.com Johnson Matthey, Orchard Road Royston, SG8 5HE, UK Tel. +44 1763 253000 © Johnson Matthey 2015 Benefits • Platinum is in the zero oxidation state with no co-ordinated chlorides • Karstedt catalyst is supplied in solution for easy dosing and formulation • High-activity Karstedt catalyst formulation promotes rapid curing under ambient conditions in the formation of silicone elastomers • Cross-linking between vinylsiloxane and silyl groups is possible at temperatures below 50°C with no by-product formation Shipping & Handling Keep solutions in tightly-sealed containers, ideally under an inert atmosphere. Store at temperatures < 30°C. Please refer to the relevant Safety Data Sheet for further information. Form:viscous liquid Platinum content: 0.8 - 1.2 % w/w Diluent viscosity: 1000 cS