The results of these and further tests show that GENIOPLAST® Pellet S reduces the plastic’s surface friction, thus improving the scratch and abrasion resistance. Furthermore, this does not adversely affect the plastic’s mechanical properties. “On the contrary, tensile strength and stiffness are actually enhanced,” reports Dr. Klaus Pohmer, who is in charge of global business development at WACKER SILICONES’ Performance Silicones business unit. He explained that the tests also showed that the modified plastic did not become tacky when exposed to ultraviolet light. That’s why interior parts made of modified polypropylene still feel good even after intense exposure to sunlight.
GENIOPLAST® Pellet S performed very well in the fogging test – as did the two silicone-based competitor products – whereas the organic additive displayed considerable weaknesses here. Unlike the organic additive, the long-chain silicone does not migrate out of the polymer, even at high temperatures. Thanks to the WACKER product, unpleasant odors and blooming of the active, as well as its undesirable deposits on the windscreen, are finally a thing of the past.