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Construction Chemistry
Methyl Ethyl Ketoxime (MEKO)
Formula:
C₄H₉NO
GOST/CAS:
CAS 96-29-7
MEKO (Methyl Ethyl Ketoxime) is a highly efficient organic reagent belonging to the oxime class. It serves as a key functional component in the production of paints and coatings, adhesives, sealants, and specialty chemical formulations. The product is a clear, colorless or slightly yellowish liquid with a characteristic mild odor. Due to its ability to effectively block surface oxidation and polymerization without altering the core properties of the material, MEKO is indispensable as an anti-skinning agent in the formulation of durable industrial and decorative coatings.
Applications
Paint and Coatings Industry: Acts as the primary anti-skinning additive for alkyd, oil-based, and polyurethane paints, enamels, and varnishes, preventing skin formation on the surface during storage in containers.
Sealants and Adhesives: Used as a blocking agent in one-component polyurethane and silicone formulations (oxime-curing systems) to ensure product stability prior to application.
Polymer Synthesis & Chemical Industry: Utilized as an intermediate and blocking agent for isocyanates in the manufacturing of powder and liquid thermosetting coatings.
Laboratory Research & Specialty Chemistry: Applied as a selective reagent in fine organic synthesis and analytical chemistry for studying polymerization processes.
Key Advantages
High Anti-Skinning Efficiency: Minimal dosages of MEKO (typically 0.1–0.3% of the total formulation weight) reliably protect coatings from premature drying in closed packaging without extending the standard drying time after application.
Stability and Purity: Manufactured according to strict international standards, ensuring the absence of foreign impurities, excellent solution clarity, and a consistent evaporation profile.
Compatibility with Driers: Temporarily blocks the activity of cobalt and other metal driers at the air-liquid interface, fully releasing their drying power once the solvent evaporates.
Preservation of Optical Properties: Does not affect the color, gloss, adhesion, or physical-mechanical characteristics of the cured varnish or enamel film.
Storage & Transportation
- Store in dry, cool, and well-ventilated warehouse areas in tightly closed original packaging, away from heat sources, sparks, and open flames.
- Recommended storage temperature: +5°C to +30°C. Avoid product freezing or overheating.
- Since the product is sensitive to atmospheric oxygen (and may gradually discolor/darken), opened containers should be used as quickly as possible or blanketed with an inert gas (nitrogen).
- Transportation is permitted by all modes of covered transport in compliance with dangerous goods regulations (classified as a flammable and moderately toxic liquid, UN 1993 / Class 3). Shelf life is 1 year from the date of manufacture.
Frequently bought together
Technical Specifications
Appearance
Clear, colorless or slightly yellowish liquid
Molecular Weight
~87.12 g/mol
Assay (Main Component)
≥ 99.5%
Moisture Content
≤ 0.1%
Density (at 20°C)
0.920 – 0.924 g/cm³
Free Ketones Content
≤ 0.2%
Supply info
- Industrial Packaging: 190 kg / 200 kg steel drums or 920 kg intermediate bulk containers (IBC totes).
- Small Packaging: 10 kg / 25 kg sealed jerrycans for laboratory testing, pilot trials, and small-scale manufacturing.