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| EXPERIMENTAL EPOXY RESIN MH-9-28 |
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MH-9-28 is an Epoxy Phenol Novolac resin modified with a CTBN (carboxy terminated butadiene acrylonitrile) copolymer. MH-9-28 possesses a relatively low viscosity, a functionality of 2.3 and an elastomer content of 20%. The CTBN improves the toughness of cured epoxy formulations through development of two phases during cure. The toughness improvement is achieved at a minimal sacrifice in Tg. Formulations incorporating MH-9-28 exhibit improvements in impact and thermal cycling resistance, peel and tensile shear strengths and low temperature mechanical properties compared to non-toughened epoxies. MH-9-28, due to its higher functionality, should
provide improved chemical and heat resistance compared to DGEBA modified at an equal rubber level.
The table on the back of this page presents the effects of the incorporation of liquid rubber on some cured properties of an EPALLOY 8240/dicyandiamide formulation. The use of alternate curing agents, in one or two part formulations, can be expected to produce different results.
MH-9-28 should be considered for use as the sole resin or as a part of the resin component of your formulation. The optimum concentration of MH-9-28 should be determined empirically. Typical applications generally incorporate 5-15 phr* rubber to achieve optimal toughness,
higher concentrations increase flexibility.(*phr ?parts per hundred parts resin.)
* APPLICATION
- Adhesives
- Laminating
- Impact Resistance Coatings
- Reinforcements
- Filament Winding
- Molding Compounds |
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Appearance : Clear, Clean
Viscosity at 25'C, cps : 50,000 ?75,000
Epoxide Equivalent Weight, g/eq : 200 ?225
Acid Number : 0.1 max
Color, Gardner : 10 max
Weight per gallon at 25'C, lbs. : 9.5 + 0.1 |
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