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09-04-2014

New Silastic Grades

For Expanded Design Options

Dow Corning Corporation, Midland, MI/USA, is introducing two new Silastic brand F-LSRs to expand design options and provide processing efficiency for fuel-resistant automotive components. The newest product offerings add 60 and 70 durometer hardness options to a growing family of fully and partially fluorinated liquid silicone rubbers – according to Dow Corning, a portfolio whose size is unmatched by any other fluorosilicone elastomer supplier.

Meeting key market needs for both performance and cost control, innovative Silastic F-LSRs combine the fuel, oil and solvent resistance of fluorosilicone rubber (FSR) with the processing benefits of liquid silicone rubber (LSR). The two newest Silastic fluoro liquid silicone rubbers in Dow Corning’s product range are Silastic FL 60-9201 F-LSR (60 Shore A durometer) and Silastic FL 70-9201 F-LSR (70 Shore A durometer). Both exhibit excellent resistance to nonpolar hydrocarbon fuels, oils and solvents and offer process cost savings, especially for molding small parts in high volumes. Silastic FL-60-9201 F-LSR provides excellent flexibility for dynamic seals such as diaphragms and membranes, while Silastic FL 70-9201 F-LSR provides high modulus with low compression set for static seals such as O-rings and gaskets.

Figure: Dow Corning

The new hardness options join Dow Corning’s other fully fluorinated (30 and 40 Shore A) and partially fluorinated (45 and 65 Shore A) liquid silicone rubbers. Designers can choose from a full range of excellent performance properties to meet specific application requirements. Fabricators benefit with optimized rheology for easier molding of intricate parts, fast cure profiles for shorter cycle times, reduced flash and scrap, enhanced dimensional stability, and lower processing temperatures for over-molding of plastic parts.

“These new Silastic F-LSR products give designers added flexibility for meeting critical performance requirements on small, intricate high-precision or over-molded parts that must withstand harsh service conditions,” said Gabe Knee, Automotive Market Leader for Dow Corning. “And, the Silastic F-LSR technology offers fabricators substantial process gains for producing newer seals, gaskets, connectors, flexible diaphragms, membranes and valves using standard injection molding equipment.”

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