| Description: “Dispersion” is a term used to describe a silicone elastomer system that is suspended or dispersed in a solvent carrier. It is a complex solution that contains silicone polymers of various molecular weights and reinforcing fillers. The substituent groups comprising the polymer back bone structure may consist of the following: Polydimethylsiloxane, Dimethyl Diphenyl copolymer, and Fluoro homo polymer or copolymer. Silicone dispersions typically have low viscosities, which is beneficial for applications wherein a thin film coating is needed, and they can easily be used in dipping and spraying processes. NuSil uses a variety of solvents to disperse silicones, such as xylene, tert butyl acetate, heptane, hexane, acetone and naphtha. Important Properties of Dispersions: Prior to curing, dispersions can exhibit various uncured properties, as listed below. These properties define the characteristics of dispersions and their behavior during application: - Addition or moisture cure
- Supplied as one or two part system
- Viscosity and Rheology - Most dispersions are shear thinning, meaning the viscosity decreases with increase in shear.
- Viscosity decreases by decreasing the solids content
Comments: One part adhesive, in HeptaneCure Systems: Acetoxy Information provided by NuSil |
