Brands Technical Data Sheets Shelf Life Starting Formulations Find a Distributor

Elastomer-Modified Epoxy Resins for Extra Strength and Flexibility

EPON™ elastomer-modified epoxy resins incorporate flexible elements into the polymer backbone, which toughens the thermoset system by distributing internal stress over a greater area. After full cure, a secondary “rubber toughened” phase occurs, delivering:

Improved peel strength
Improved shear strength
Better thermal shock resistance
Better fatigue resistance

Hexion offers a wide variety of EPON elastomer-modified epoxy resins adducted with varying elastomer contents. Adduction improves the overall performance and shelf stability of formulated components, as compared with simple blends of resin and CTBN elastomers. Optimal rubber content in the final formulated system typically ranges from 1 to 50% by weight. These elastomer-modified epoxy resins are compatible with a variety of standard liquid epoxy resins. They are used in the formulation of toughened epoxy resin systems designed to avoid brittleness and cracking in high performance applications such as:

Elastomer-modified Epoxy Resins

Product	Typical Properties			Description	Application
Product	Resin Type	Viscocity at 25^oC, P	WPE, g./eq.	Description	Coatings	Construction	Composites	All Others⁽¹⁾
EPON Resin 58005	CTBN- modified BPA epoxy	3000 - 8000	325 – 375	Epoxy resin with 40%. elastomer content. Increases peel strength, thermal shock resistance, toughness and fatigue resistance.
EPON Resin 58006	CTBN- modified BPA epoxy	1500 – 3000	330 – 360	Epoxy resin with 40%. elastomer content and a lower acrylonitrile level than EPON 58005. Improves flexibility and fatigue resistance.
EPON Resin 58034	CTBN -modified DGENPG	40 - 80	275 - 305	Elastomer- modified HELOXY™ 68 with 50% elastomer content. Provides a low viscosity and high toughness
EPON Resin 58901	CTBN- modified BPA epoxy	1000 – 5000	195 – 210	Epoxy resin with 5%. elastomer content. Provides flexibility and early green strength.

HIGHLY RECOMMENDED:

⁽¹⁾ Other applications include adhesives, electrical castings, electrical laminates and fibers

For more information, see Starting Formulations, Technical Data Sheets, or speak with a representative.