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Viton™ VC-7 is a curative required for use with the G-types of peroxide-curable Viton™ fluoroelastomers.
Viton™ VC-7, known as Diak™-7, is a reactive polyfunctional triazine cogent used with G-type peroxide-curable fluoroelastomer compounds. The Viton™ G-family of fluoroelastomer mixes cannot be cured with peroxide; the process requires a curative coagent. In combination with peroxide, Viton™ VC-7 fluoroelastomer curing agent provides excellent tensile properties and high-temperature compression set resistance. The typical usage level for Viton™ VC-7 is 2.5 to 4 phr.
Viton™ VC-7 fluoroelastomer curative serves a different formulation purpose than the other Viton™ curing agents. Unlike VC-1 and VC-3 diamines that help the A-, B-, and E-types of Viton™ fluoroelastomers, Viton™ VC-7 is specialized for G-types as the suggested curative for all Viton™ GF-200S compounds. Viton™ VC-7 has a melting point that can be either solid or liquid, depending on the storage conditions. Viton™ VC-7 can be blended with a filler, additional polymer additives, and polymer resin such as FKM (fluoroelastomer), ACM (alkyl acrylate copolymer), AEM (ethylene acrylic rubber), and ECO (Epichlorohydrin rubber).
Physical Form: Liquid above 27 °C (81 °F)
Appearance: Straw yellow
Odor: Pungent
Specific Gravity: 1.16 ± 0.02
Melting Point: 25 ± 2 °C (77 ± 4 °F)
Solubility: Slightly soluble in water; soluble in benzene, ethyl alcohol, acetone, and heptane
Primary Chemistry: Triallyl isocyanurate containing a small amount of a hydroquinone inhibitor for storage stability
Excellent tensile properties
High compression set resistance
Low melting point
Fast cure and short cycles
Compatible with FKM (fluoroelastomer), ACM (alkyl acrylate copolymer), AEM (ethylene acrylic rubber), and ECO (Epichlorohydrin rubber)
Difficulties curing FKM and H-family copolymers with only peroxide curing agents
Insufficient tensile properties in fluoroelastomers with traditional curing agents
Lack of chemical resistance and scorch safety
G-type fluoroelastomer compounds
Cross-linking agent
Coagent for FKM and FFKM polymers
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