Polysulfide Liquid Polymer and Modified Epoxy Resins Casting Compounds.

摘要

The requirements of the casting and embedment fields are stringent and varied. As a result, the casting compounds used must be extremely versatile to be of value in the many different applications normally encountered. The properties of the polysulfide liquid polymers enable them to be used in many of these applications. These polymers are low-viscosity resins which cure at room temperature to elastomeric solids. In this cured state they have excellent flexibility, dimensional stability, fair electrical properties, resistance to most chemicals and solvents, and the ability to seal out water and water vapor effectively. They may also be chemically combined with epoxy resins to take advantage of the inherent toughness and high strength of these latter resins while contributing flexibility and dimensional stability over a wide range of conditions. jg p4.