Formulators who develop coatings based on oxidatively cured (alkyd) binders face major regulatory obstacles for two key ingredients: methyl ethyl ketoxime
(MEKO) anti-skinning additive and cobalt-based driers.
Key statement: A composition includes an elastomer and a ketoximo silane or a ketoxime
(6.) Pilemand, C, Wallstrom, E, Poulsen, PB, "Substitution of Cobalt Driers and Methyl Ethyl Ketoxime
in Oxidative Drying Systems." Eur.
This high-performance sealant has a low volatile organic compounds (VOC) content and low methyl ethyl ketoxime
Table 1--Solventborne Sucrose Polyester Alkyd Paint Formulation GRIND lb/100 gal Gallons Long oil alkyd--70% NV 112.7 14.3 Organoclay derivative 1.3 0.1 Mineral spirits 12.6 2.0 Pigment dispersant 6.3 0.8 Corrosion inhibiting pigments 10.3 0.4 Titanium dioxide 259.9 7.8 Nepheline syenite extender 152.1 7.0 LETDOWN Long oil alkyd--70% NV 331.5 42.0 Sucrose polyester 124.4 15.7 12% Co drier solution 2.2 0.3 12% Zr drier solution 14.5 1.8 2,2-Bipyridyl chelating agent 2.7 0.3 Methyl ethyl ketoxime
2.6 0.3 Mineral spirits 46.4 7.2 TOTAL 1079.5 100.0 Formulation Characteristics Pigment/binder ratio 0.94 % Pigment volume concentration 22.6 % Nonvolatile by weight 80.8 % Nonvolatile by volume 67.7 VOC [g/L] 249
The behavior of a methyl ethyl ketoxime
(MEKO)-blocked isocyanate on heating was studied using thermal analytical techniques.
Largely in Europe, Ascinin[R] AntiSkin antiskinning agents serve as methylethyl ketoxime
alternatives and Borchers[R] Dry driers find use as replacements for cobalt-based products.
Since the introduction of the first ketoxime
LIX64N, a new group of extractant reagents has been developed which is now being used in the copper industry.
(2,7) Also, the effect of the antiskinning agent, methyl ethyl ketoxime
(MEKO), on the activity of a drier has been monitored using this test system.
Products include: ammonium polyphosphate (phase II, N>1000), capacity: 2000 MT/Y; (standard grade, reacted coated, modified coated, silicon coated); micronized, penta 40; chlorinated paraffin 70; vaniskin MEKO (methyl ethyl ketoxime
); and rosin resin.