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BECKOPOX EM 460/60IBX is an excellent adhesion to steel and nonferrous metals, high corrosion protection, best recoatability. With polyvinylbutyral for one- and two-component washprimers, weldable shop primers. BECKOPOX EM 460/60IBX is used preferably in combination with polyvinyl butyral (PVB) for the production of wash primers and finish coatings. The ratio of Beckopox EM 460 to PVB should be 1 : 3 to 2 : 1. Wash primers based on this binder combination can be produced both as one-pack and two-pack systems. The solids content of primers based on polyvinyl butyral can be greatly increased by the use of Beckopox EM 460. It also improves adhesion and corrosion protection, especially in wash primers with chromate-free pigmentation. Primers based on the combination of Beckopox EM 460 with PVB cause no complications when overcoated with paints based on alkyd resins drying by oxidation, PVC mixed polymers, nitrocellulose and isocyanate-crosslinking acrylic resins. Even in the case of stoving enamels they cause no discolouration of the topcoat. Two-pack epoxy paints should be tested from case to case. Weldable shop primers Beckopox EM 460 is also suitable for the manufacture of weldable shop primers. In this case the PVB component should predominate in the combination. The effect of these primers on pore formation in the weld is slight, as is the odour problem, since no formaldehyde is given off.
ROSKYDAL E 70 is a flexibilising resin for wax-free polyesters, UV-curing styrene systems and spray, roller and knifing fillers. Even in a ratio of 6 : 4, clear or pigmented combinations of ROSKYDAL 500 A and ROSKYDAL E 70 have excellent scratch resistance and gloss. This mixing ratio yields highly flexible coatings and improves the polishability of films based on ROSKYDAL 500 A. ROSKYDAL E 70 is also suitable for use as a flexibilizer in photo-polymerizing ROSKYDAL systems and in clear coats, roller primers and highly filled roller fillers based on ROSKYDAL 300/1. ROSKYDAL E 70 is a highly effective flexibilizer. The systems to which it is added are easier to sand because they abrade more readily. Adding larger amounts of ROSKYDAL E 70 to spray fillers based on wax-free polyesters such as ROSKYDAL 500 A or 620 yields excellent adhesion on medium-density fiberboard, metal car body components and some plastics. ROSKYDAL E 70 can also be used to flexibilize amine-accelerated grades such as ROSKYDAL K 14 M, K 36 and K 40 T.
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