POLYSULFIDETrade Name:Thiokol (types A, B, FA, ST) . . . Thiokol Corp. ASTM D1418 Designation: T ASTM D2000/SAE J200 Type, Class: AK, BK Apple Compound Designation: TH Standard Color: Black Description: Another of the early developed synthetic elastomers, Polysulfide offers a remarkable combination of solvent resistance, low temperature flexibility, flex crack resistance, oxygen and ozone resistance, and gas impermeability. Key Use(s): Seals for paint and coatings and insecticide industry use. Temperature Range: Standard Compound: -50° to +225°F. Hardness (Shore A): 50 to 80 Features: Resistant to a wide range of solvents, including ketones, ethers, and aromatic hydrocarbons. Polysulfide has gained wide acceptance as a seal material for paints and coatings, and insecticides. Limitations: With poor heat resistance, poor mechanical strength and compression set properties, Polysulfides are not as versatile as other elastomers from a performance standpoint. They are also not recommended for exposure to mercaptans, esters, amines, chlorinated or nitro hydrocarbons. |
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