25-Feb-2014 Düsseldorf / Germany
Retaining Adhesives with Higher Temperature Resistance
Henkel has developed two Loctite anaerobic retaining compounds that perform at operating temperatures up to 180°C and show very reliable cure strength through oil contaminations and on passive metal surfaces.
"Loctite 638 and 648 offer customers increased reliability and greater heat resistance," says Dr. Niamh O'Reilly from Henkel’s Product Development department. The newly-developed Henkel adhesives guarantee secure bonding on insufficiently cleaned parts, solving a problem that is typical in many manufacturing processes. They achieve excellent curing on all metals, including passive metal surfaces like stainless steel. This allows for more flexibility in substrates and designs. All proven properties like cure speed, strength, chemical resistance and shelf life were maintained.
When used to secure bearings, bushings, gears and cylindrical assemblies into housings or onto shafts, Loctite 638 and Loctite 648 retaining compounds allow higher load transmission and uniform stress distribution, while also eliminating fretting corrosion. The reliability of the joint increases compared to conventional unbonded assemblies, while expensive machining and surface-finishing operations become redundant: The overall cost of an assembly is reduced. Certifications from renowned institutions such as NSF, DVGW and WRAS prove that the new adhesives comply with state-of-the-art industry standards. "Customers worldwide already use our new retaining compounds in demanding applications,” says Henkel Product & Technology Manager Dr. Bettina Temath. “These include machine and vehicle manufacturing as well as maintenance applications where reliability is key."
Loctite 638 is a high strength, high viscosity adhesive to be used on applications with larger gaps approaching 0.25 mm. Loctite 648 is a high-strength, low viscosity retaining adhesive that is most suitable for applications with smaller gaps up to 0.15 mm. Both products are available all around the world.