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Technical Paper

SPS Crystalline Polymer: A New Material for Automotive Interconnect Systems

Syndiotactic Polystyrene (SPS) is a new semi-crystalline polymer under development by Dow Plastics. The material is completely different from conventional styrenics in structure, physical properties and synthetic method, and represents the basis for an entirely new family of materials based on crystalline polystyrene. SPS has a melting point of 270°C (520°F) combined with excellent resistance to moisture and automotive fluids. Additionally, SPS products exhibit exceptional electrical performance and competitive toughness and stiffness. A wide range of products have been formulated for specific applications including impact-modified and glass-reinforced grades. This paper was designed to discuss the performance attributes of SPS as they relate to use of this material in automotive, interconnect systems where a combination of heat resistance, chemical resistance, dimensional stability and enhanced processability are required.
Technical Paper

Development of Thermoplastic Polyurethane/ABS Blends for Flexible Automotive Bumper Fascia

Thermoplastic polyurethane/ABS blends are being developed by The Dow Chemical Company to meet the high performance requirements for flexible bumper fascia. Features of these blends include paintability without priming, excellent low temperature impact after painting, good heat resistance, and lower specific gravity than other high performance thermoplastic materials. Thermoplastic polyurethane/ABS blends also have excellent flow properties, which will allow large, complex parts with thin walls to be molded easily.
Technical Paper

New High Heat Stable, Low Gloss. Automotive Interior Trim Resins Having Excellent Processability

A new family of high heat stable, few gloss ABS resins has been developed specifically to offer the automotive industry improved performance in molded interior trim parts. The new resins offer excellent fabrication and property performance similar to that of standard-heat low gloss ABS resins. Advantages over current high heat ABS resins include improved injection moldability, greater resistance to heat warping and to U.V. degradation, improved color stability, improved toughness, and consequent good finished part economics while maintaining equivalent heat resistance. Physical property and testing-evaluation data are provided.
Technical Paper

Syndiotactic Polystyrene: A New Polymer for High Performance Automotive Applications

Syndiotactic potystyrene (SPS) is a new semi-crystalline polymer under development by Dow Plastics, a business group of The Dow Chemical Company. The material is differentiated from conventional styrenic polymers in terms of microstructure and physical properties and represents the basis for an entirely new family of materials derived from crystalline polystyrene. SPS exhibits excellent thermal performance with a melting point of 270° C (520° F) combined with resistance to moisture and automotive fluids. Products produced from SPS demonstrate exceptional electrical performance, low specific gravity, competitive toughness and high modulus relative to other semi-crystalline engineering polymers. A wide range of products have been formulated including impact modified and glass reinforced resins for use in specific markets.