Product Data Sheet Version 02 / 2011 Biresin® M75 Areas of Application Product Benefits Machine application of paste on substructures for production of contour shaped machinable blanks for design-, styling- or cubing models Immediately after mixing the mixture gets thixotropic and hangs on vertical surfaces Very dense and fine surface, easy to varnish Hard material with high dimensional stability Low warpage Very good and easily workable Polishable Basis Resin Hardener Two-component-PUR-system Biresin ® M75, polyol, grey, filled Biresin ® M70, MDI-based isocyanate, reddish brown, unfilled Processing Data Individual components Viscosity, 25°C Density Mixing ratio resin to hardener Mixing ratio resin to hardener Potlife, RT, after machine application Setting time (workable) Physical Data (approx. values) Biresin ® M75 resin with hardener Biresin ® M70 light grey Shore hardness Flexural strength Compressive strength Impact resistance Glass transition temperature, Tg Biresin® M75, resin Biresin® M70, hardener Packaging Individual components Tooling & Composites Model paste

The material, processing and substrate temperature must be from 18 to 25°C. Before use the resin component must be mixed thoroughly and homogeneously through stirring without entrapping air with a suitable mixing device. Stir and evacuate machine containers with resin for some time prior to processing, subsequently switch to normal pressure and intermittent stirring. Ensure dispensing machine is set for the correct mixing ratio (for more information see Processing Instructions Biresin® M72/M73/M75). Paste beads applied on prefabricated substructures, are spreadable for approx. 15 min by spatula....