ERISYS® GE-21

ERISYS® GE-21

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)

To obtain a Safety Data Sheet (SDS) please contact Global_Product_EHS_AdMat@huntsman.com

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