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Dow Corning's Silicone and Fluorosilicone Elastomers Feature Enhanced Adhesion Properties

Published on 2011-10-12. Author : SpecialChem

Midland, Michigan, USA -- Dow Corning Corporation, a global leader in silicone and silicon-based technology and innovation, offers silicone and fluorosilicone engineered elastomers that feature enhanced adhesion properties to reduce processing costs and boost service reliability for high-performance turbocharger hoses, including intercooler (charge air) and crossover hoses.

"Our proven Silastic® brand silicone and fluorosilicone engineered elastomers can help achieve both process economy and design reliability for high-strength, long-lasting turbocharger, intercooler and crossover hoses," said Ben Son, Dow Corning's Global Automotive Powertrain Systems major market leader. "As the industry increasingly favors turbocharging diesel and gas engines to reduce emissions and increase power and mileage, heat-resistant silicone elastomers and fuel-resistant fluorosilicone elastomers are effective options for multi-layer hoses."

According to Son, Silastic engineered elastomers have two important advantages in today's turbocharger-hose applications. Optimized inter-layer adhesion allows lower-cost, efficient co-extrusion processing, and the silicone and fluorosilicone elastomers outperform many organic elastomers under harsh operating conditions.

The Silastic elastomers are able to withstand higher underhood temperatures up to and beyond +200°C (+392°F). They remain flexible in numbing cold to -40°C (-40°F) with less cracking, brittleness or hardening. They retain high burst strength at pressure extremes, and they provide durable barriers to combustion by-products and environmental contaminants. Many organic elastomers soften and deform at temperatures >100°C (>212°F) and become brittle at temperatures <-25°C (<-13°F). Special adhesives may be required for multi-layer bonding.

The silicone and fluorosilicone engineered elastomers from Dow Corning are supplied as ready-to-use, heat-cured standard compounds. They can be custom-tailored to meet special processing requirements and deliver specific performance attributes. Elastomers recommended for current turbocharger-hose applications include:

  • High consistency silicone rubber (HCR) compounds for physically tough, heat-resistant hose outer layers; and
  • Fluorosilicone rubber (FSR) compounds for hose liners or inner layers that resist degradation from fuels, oils, exhaust gas and other combustion by-products.
  • With patented technology for optimizing adhesion strength between hose layers, the Silastic silicone and fluorosilicone elastomers can be economically co-extruded. Hose integrity, strength and reliability are enhanced. Hose-reinforcing materials can be matched to application need.

    "These high-performance engineered elastomers offer benefits in processing and performance over other hose-construction compounds," Son said. "As one company with many automotive solutions (PDF), Dow Corning continues to focus on the industry's needs for materials innovation, application expertise, total technical service and regional support."

    About Dow Corning

    Dow Corning provides performance-enhancing solutions to serve the diverse needs of more than 25,000 customers worldwide. A global leader in silicones, silicon-based technology and innovation, Dow Corning offers more than 7,000 products and services through the Dow Corning® and XIAMETER® brands. Dow Corning is a joint venture equally owned by The Dow Chemical Company and Corning, Incorporated. More than half of Dow Corning's annual sales are outside the United States.

    Source: Dow Corning


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