HyPox RF 933 Epoxy phenol novolac resin modified with CTBN CVC Epoxy Resins >> Phenol & Cresol (Novolacs) HyPox RF933 is an Epoxy Phenol Novolac resin modified with CTBN. HyPox RF933 has a functionality of 2.6 and an elastomer content of 20%. The rubber improves the toughness of cured epoxy formulations through development of two phases during cure. This improved toughness is achieved at a minimal sacrifice in Tg. Compared to DGEBA (EEW-188 g/eq), modified at an equal rubber level, HyPox RF933 should provide improved chemical and heat resistance because of its higher functionality. Formulations incorporating HyPox RF933 will exhibit improvements in impact and thermal cycling resistance, peel and tensile shear strengths and low temperature mechanical properties compared to nonrubber modified epoxy formulations. HyPox RF933 should be considered for use as the sole resin or as a part of the resin component of your formulation. The optimum concentration of HyPox RF933 should be determined empirically. Typical applications generally incorporate 5-15 phr* rubber to achieve optimal toughness, higher concentrations improve flexibility. It is used in adhesives, laminating, impact resistance coatings, filament winding, molding compounds. Epoxy Phenol Novolac resin modified with CTBN. Improves impact and thermal cycling resistance, peel and tensile shear strengths and low temperature mechanical properties compared to nonrubber modified epoxy formulations. Used in laminating, impact resistance coatings, filament winding, molding compounds.