Emerald Group Publishing Limited
Copyright © 2008, Emerald Group Publishing Limited
New nanosilica filled reinforced epoxy
Article Type: New materials and equipment From: Pigment & Resin Technology. Volume 37, Issue 3.
New nanosilica filled one component UV curable epoxy called UV22 has been introduced by Master Bond Inc. This compound has been developed for coating, sealing and encapsulation applications. It features superb abrasion resistance, excellent optical clarity, low-shrinkage and high- physical strength properties. UV22 cures rapidly at room temperature upon exposure to a UV light source and is not oxygen inhibited. It has a service operating temperature range of 260 to 300°F (250 to150°C). Post curing the UV22 material enhances its temperature resistance profile. Adding heat (195-257°F for 30min) will give it a glass transition temperature of 275°F, far higher than traditional UV systems. The post curing is also effective in increasing its chemical resistance to solvents, acids and bases.
UV22 is easy to use. Despite the relatively high percentage of nanoparticles (> 35 percent) added to the UV22, it still retains high transparency and low viscosity without sedimentation due to the agglomerate- free colloidal dispersion of the nanoparticles in the resin. UV22 has a Shore D hardness of > 80 and a tensile strength of > 4,600 psi. It has a refractive index of 1.52 and shrinkage of 1-2 percent. Its electrical insulation properties are superior.
UV22 is 100 percent reactive and contains no solvents or diluents. It is available for use in pint, quart, gallon and 5 gallon containers. It is also available in syringe applicators. Higher viscosity versions are also available.