High Cobalt Dispersed Drier 21% Co CAS 21041-93-0 Cobalt Hydroxide Dispersion for Oxidative Coating
High Cobalt Dispersed Drier 21% Co CAS 21041‑93‑0 is high‑content cobalt‑based drier based on cobalt hydroxide dispersion. With 21% high cobalt metal content, it differs from traditional solvent‑dissolved cobalt carboxylate driers. It provides efficient catalytic activity for oxidative cross‑linking in air‑drying coatings, features low solvent contribution, convenient dosage adjustment, and fits high‑solid, low‑VOC oxidative coating production.
Product Overview
High Cobalt Dispersed Drier 21% Co CAS 21041‑93‑0 is a high‑concentration cobalt hydroxide dispersion serving as catalytic drier for oxidative coatings. It exists as fine dispersed solid phase instead of being dissolved in organic solvent. When added into oxidative curing coating systems, it releases active cobalt component to catalyze oxidative polymerization of unsaturated resin structures and promote film drying. Ultra‑high cobalt content greatly reduces required addition amount. It brings less solvent interference to formulas, adapts to high‑solids and low‑VOC alkyd systems, and maintains stable performance during storage and industrial batching.
Key Features
‑ 21% ultra‑high cobalt content, significantly lower addition dosage ‑ Cobalt hydroxide dispersion structure, different from conventional cobalt carboxylate driers ‑ Low organic solvent contribution, friendly for low‑VOC formulation design ‑ Provides stable catalytic effect for oxidative curing coating systems ‑ Convenient metering and dosage adjustment for industrial production ‑ Compatible with zirconium, calcium and other auxiliary drier combinations ‑ Good dispersion stability under proper storage condition ‑ Cost‑effective for high‑volume oxidative coating manufacturing
Technical Specifications
‑ Product Name: Cobalt Hydroxide Dispersion ‑ Cobalt Content: 21% Co ‑ CAS No.: 21041‑93‑0 ‑ Appearance: Dark‑blue viscous dispersion liquid ‑ Carrier: Non‑volatile dispersion medium ‑ Density: 1.20‑1.40 g/cm³ @25℃ ‑ Viscosity: Medium‑viscosity dispersion ‑ Flash Point: ≥100℃ ‑ Moisture: ≤0.3%
Application Scenarios
‑ High‑solids oxidative curing alkyd coatings ‑ Low‑VOC solvent‑reduced air‑drying industrial coatings ‑ Alkyd anti‑rust paint, machinery finishing coatings ‑ Oxidative drying decorative paint and varnish ‑ Cooperate with auxiliary driers to realize full‑film through‑drying effect
Usage Recommendation
‑ Typical dosage: 0.05%‑0.30% calculated on total paint weight (as metal cobalt) ‑ Under gentle stirring, add into coating formula at late mixing stage ‑ Do not add during high‑temperature resin synthesis process ‑ Combine with zirconium or calcium drier to optimize through‑drying performance ‑ Avoid long‑time high‑shear over‑grinding which may affect dispersion stability ‑ Strictly conduct laboratory tests on drying speed, dispersion status and film property before mass‑scale production
Package & Storage
‑ Standard package: 25kg / 200kg metal drum ‑ Store in cool, dry and well‑ventilated warehouse, avoid freezing and high‑temperature exposure ‑ Keep container tightly sealed after opening; stir thoroughly before each use ‑ Shelf life: 12 months under proper storage conditions
Safety Notes
‑ Combustible mixture, keep away from ignition sources. ‑ Avoid skin contact and eye splash. Wear chemical‑resistant gloves and safety goggles during handling. ‑ Avoid inhalation of mist, ensure sufficient local ventilation. ‑ Refer to SDS for full guidance on handling, transportation and emergency disposal.
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