Octa-Soligen 141 Z Mixed metal drier with low cobalt content, free from heavy metals Bayer-Börchers Drier / Siccative Alkyd Resins White spirit Octa-Soligen® 141 Z 14 Mixed metal drier with low cobalt content, free from heavy metals. Particulary suited to light-coloured paints and varnishes. Description The mixed drier Octa-Soligen® 141 Z is a product developed by our laboratories which combines a large application field with a strong decrease of discolouration caused by cobalt. With Octa-Soligen® 141 Z the formulators get a drier system, free from lead and heavy metals, wich allows good drying characteristics in medium and longoil alkyd resins. Properties Octa-Soligen® 141 Z is a multi metal drier giving high reactivity, which results of the synergie effects developed by the different metals in the mixture in particular proportions. This allows low dosage and thus a homogeneous and even drying and improves at the same time the hardness of the paint film. The even drying results of the low dosage of cobalt allowing a progressive surface drying of the paint film. This effect which is essential for the oxidations within the paint film allows at the same time the evaporation of the solvents. Use The drier Octa-Soligen® 141 Z is a particularly stable product. It is used in formations based on medium and long-oil resins. In the case of formulations based on long-oil resins containing drying retarding pigments or pigments causing a loss of drying power (e.g. carbon black or toluidine red) we recommend to add Octa-Soligen Drier Calcium 10 to the mill base in order to stabilize the drying power. Dosage The particular composition of Octa-Soligen® 141 Z carries along a modification of the usual calculation methods. In fact, with this new drier it isn't necessary anymore to maintain the same quantity of cobalt when passing to lead-free systems. Many test have allowed to determine a reliable and extrapolatable method, wichever resin may be utilized. Medium oil resins (40 - 55 %) We recommed, for this kind of formulations, the introduction of between 2 and 4 g of Octa-Soligen® 141 Z as supplied per 100 g of resin solids. Example: resin of 50 % introduced to 60 % into the formulation: Solids content: 30 % x 0,04 = 1,2 % of Octa-Soligen® 141 Z, related to the total formulation. Long-oil resins (55 - 75 %) We recommend the introducation of between 4 and 6 g of Octa-Soligen® 141 Z as suplied per 100 g of resin solids. Example: resin of 65 % introduced to 50 % into the formulation: Solid content: 32,5 % x 0,06 = 1,95 % of Octa-Soligen® 141 Z, related to the total formulation. If there are strong proportions of drier-adsorbing pigments (due to their high specific surfaces) and/or resins with an oil-length superior to 70 % in this kind of formulations it may become necessary to add Octa-Soligen® Calcium 10 (see separate data sheet). In this case the recommended dosage of Octa-Soligen® Calcium 10 is about 50 % related to the dosage of Octa-Soligen® 141 Z. Suited to light-coloured paints and varnishes. Combines a large application field with a strong decrease of discolouration caused by cobalt. Drier system, free from lead, wich allows good drying characteristics in medium and longoil alkyd resins. Multi metal drier giving high reactivity, which results of the synergie effects developed by the different metals in the mixture in particular proportions. Allows low dosage and thus a homogeneous and even drying and improves at the same time the hardness of the paint film. The low dosage of cobalt provides a progressive surface drying of the paint film and allows the evaporation of the solvents. Stable product. Recommended usage level: for medium oil resins (40 - 55 %), 2 and 4 g per 100 g of resin solids, for long-oil resins (55 - 75 %), 4 and 6 g per 100 g of resin solids.