New products include Hypro 1300X63 ETBN, Hypro 1300X68 ETBN and Hypro™ 2000X174 ETB. The first two are diglycidyl esters of low molecular weight butadiene-acrylonitrile copolymer while the third is a diglycidyl ester of a low molecular weight butadiene homopolymer. All three products are designed to function as toughening agents for applications such as molding, adhesives, impact resistant coatings, prepregs and composites when used at low levels. At high loadings they offer highly elastomeric properties to epoxy systems even at temperatures below -40C.
The new product platform represents an expansion of Emerald’s CTBN reactive liquid polymer technology which combines the technology it acquired from its predecessor, BFGoodrich, along with technology the company acquired from CVC Specialties Inc. in 2008.
Unlike traditional epoxy resin adducts, the new products are essentially 100% epoxy functional rubber. As compared to traditional CTBN adducts which typically use bisphenol A, bisphenol F carrier resins or other diluents, these new glycidyl ester modifiers do not utlize resins or diluents. Because of this, these modifiers can be used in any epoxy system as there in no limiting compatibility from the carrier resin. The new glycidyl ester additives also allow formulators to modify resin systems so they can achieve lower formulated viscosities at equal rubber content, which may be a processing advantage in certain applications, while maximizing Tg, lap shear, and peel adhesion.