DELO has developed a new adhesive that it says achieves up to three times the strength of its predecessor products at high temperatures. DELO MONOPOX HT2860 can also be inductively cured, which significantly accelerates manufacturing processes. Among other applications, the epoxy resin is used in electric motors.
With many epoxy resins, temperatures of +150°C and more lead to a change in the polymer structures and thus to a drop in performance. The elasticity also often increases above this temperature range.
With DELO MONOPOX HT2860, DELO has now developed a structural adhesive with a glass transition temperature (Tg) of +168°C. As a result, the Young’s modulus below Tg does not change significantly; the adhesive achieves a very high temperature stability; and the flexibility only increases above this temperature. On sand blasted aluminium, and at +150°C, DELO MONOPOX HT2860 achieves a strength of 18MPa. This is up to three times higher than that of standard epoxy resins.
The adhesive also shows very good adhesion to metals, temperature resistant plastics, ferrite compounds and ceramics. At room temperature, for example, it achieves a compression shear strength of 65MPa on aluminium and 55MPa on ceramics.
The adhesive is heat cured in an oven or by induction. The latter requires metal joining partners and enables a reduction in process times by up to 90%, whereby the adhesive achieves the same high strength as with standard curing at +150°C and 40 minutes in the convection oven.
Another advantage of the new structural adhesive is that the adhesive containers of DELO MONOPOX HT2860 can be processed in the production line at room temperature for four weeks before heat curing.
DELO MONOPOX HT2860 also has a temperature range of use of -55°C to +220°C and is suitable for bonding under high static or dynamic loads.
Having joined the magazine in 2012, Claire developed her knowledge of the industry through the numerous company visits, exhibitions and conferences she attended both in the UK and abroad.
Claire prides herself on keeping readers well informed and up to date with the latest industry news.