Two grades of resorcinol diglycidyl ether (RDGE), a difunctional aromatic resin, are now offered by HAR. HAR 2120 has properties that are similar to other commercial RDGE resins, including a relatively low viscosity (500-1,000 cps), making it an excellent choice as a reactive additive to reduce viscosity while enhancing physical properties.
HAR 2140 is a higher molecular weight RDGE with viscosity of 3,500-4,500 cps, enabling the formulator to use HAR 2140 in higher concentrations or even as the sole resin system. In addition, unlike HAR 2120 and other commercial RDGE resins, HAR 2140 will not crystallize in storage, eliminating the need for heated storage and/or melting ovens.
Both grades provide many advantages, including:
• High cross link density upon curing.
• Exceptional chemical resistance.
• Superior adhesion to wide variety of substrates.
• Enhances physical properties of DGEBA.