Specialty Chemicals

ROSKYDAL 500 A is a formulation of clear and pigmented, wax-free coatings for wood and furniture, high-gloss to matt, with good chemical resistance and very good flow properties and scratch resistance. Also in the formulation of spray and curtain-coating fillers for wood, metal and plastic. Coatings based on ROSKYDAL 500 A cure to formhard, scratch-resistant films. The addition of ROSKYDAL 550 (up to 50 %, calculated on the resin supply form) or E 70 (up to 30 %) improves the flexibility and polishability of the films without reducing the scratch resistance. Fillers and putties can be flexibilized with ROSKYDAL E 65 or E 70. The use of ROSKYDAL E 65 is particularly recommended because of its air-drying properties. As is commonwith unsaturated polyester systems, coatings based on ROSKYDAL 500 A are cured with a cobalt/hydroperoxide combination. The cobalt not only splits the peroxide into free radicals but also promotes surface drying. It thus influences two independent but simultaneous reactions. As the breakdown of the hydroperoxide accelerates at higher temperatures, even without the addition of cobalt, it may be necessary to reduce the amount of cobalt added. Otherwise the surface drying will be much quicker than the polymerization of the film, which may result in surface defects. The cobalt/hydroperoxide ratio must be optimized for the formulation, film thickness, application method and drying conditions selected. The standard addition at room temperature is 0.02 - 0.05 % cobalt metal and 1 – 3 %

SETAL 1603 BA-78 provides VOC compliant coatings (400 g/l) with high build and gloss, very good outdoor durability, good mechanical properties and good chemical resistance (in combination with aliphatic poly-isocyanates). It is used as two component clearcoats and solid colour topcoats for vehicle refinish. Co-binder for combination with acrylic resins for two component systems with reduced VOC.

SETAL 173 VS-60 LC is a high hardness, very good adhesion and flexibility, good chemical and water resistance. It is used as automotive paint systems (in combination with CAB 531-1). Automotive metallic base coats. Automotive solid colour systems. Automotive primers.

SETAL 82166 SS-55 is a combination with aliphatic poly-isocyanates: good anti-sag property with good levelling and clarity after drying at increased or ambient temperature. Good outdoor durability, excellent mechanical properties. It is used as flexible clearcoats applied over basecoats. Clearcoat has good anti-sag property directly after spraying of high film thickness. Easy handling at paint preparation and good storage stability.