ERISYS GE-21, epoxidized Butanediol, is a low viscosity, aliphatic, diepoxide. It is intended for use as a reactive diluent for high viscosity epoxy resins. GE-21 is compatible at all concentrations with those resins and resin/diluent blends can be cured using any epoxy resin curing agent. As a result of its chemical structure GE-21 is not as efficient in viscosity reduction as the aliphatic monofunctional reactive diluents ERISYS GE-5, GE-6, GE-7, and GE-8. However, the performance properties of epoxy formulations diluted with GE-21 are modified to a lesser degree than those of systems containing the aliphatic monofunctional diluents. Depending on concentration, properties such as gel time, strength, and modulus of a GE-21 diluted formulation remain relatively unchanged compared to an undiluted resin.  The difunctionality of GE-21 helps to produce formulations with improved chemical and heat resistance compared to formulations containing monofunctional diluents. GE-21 does not affect the pot life of precatalyzed epoxy resin/acid anhydride formulations. Formulations containing GE-21 exhibit excellent wettability making them ideal candidates for composite and impregnation applications. GE-21 has low moisture, hydrolyzable chloride and residual epichlorohydrin contents. Its exceptionally low color makes GE-21 the diluent of choice in color critical applications.

Typical Properties Values
EEW, g/eq 120-130
Viscosity, cps 10-18 @25°C
Color, Max 100 (APHA)
Hydrolyzable Chloride, Max % 0.10
Residual Epichlorohydrin, Max ppm 10
Weight per Gallon, @25°C lbs. 9.2 +/- 0.1
Flash Point, °C (°F) >110 (230)

North American Format

Mexico SDS Format

Europe (REACH) Format

GHS Internatl Format

China SDS Format

Application Group Application Description
Composites Tooling and Laminating 2K Epoxy Systems Reactive diluent providing viscosity reduction, retention of thermal and physical properties.