Issue 8/2015 - WACKER develops new silicone adhesives

Together with INPRO Innovation for Advanced Production Systems for the Automotive Industry, WACKER has successfully developed a new silicone adhesive for mounting engine oil pans
.
The product, called ELASTOSIL RT779, adheres to both aluminium and polyamide substrates, eliminating the need for mechanical fasteners
for the installation of plastic oil pans.

ELASTOSIL RT779 is a follow-up to ELASTOSIL 76540 silicone adhesive for bonding aluminum and polyamide oil pans, a self-adhesive condensed cross-linked two-component silicone rubber with excellent rheological properties, stability while reducing viscosity under shear forces, obtaining fluidity, and can be easily processed
using two-component mixing and metering equipment.
In addition, its curing is fast, even if the product is stored for a long time, the effective use time can still be maintained within 5~10 minutes
.
The storage life of the hardener components has also been significantly improved
.

The adhesive adheres firmly to aluminium and polyamide substrates for a long time without the need for a surfactant, and after only 20 minutes of installation, the bond strength for the engine and oil pan can be continued to be processed, thus significantly reducing the production cycle time
.
When the product is fully cured, the bond strength is significantly higher than 0.
25 MPa
.
The engine oil pan bonded with ELASTOSIL RT779 can carry more than 100 kg even after many years
.
This feature enables ELASTOSIL® RT779 not only to meet but to exceed any production standards
that must be followed when fixing such components.

(Degenhart)