Low‑Cobalt Co‑Mn Drier 4% Co 4% Mn CAS 136-52-7 for Pale Alkyd Paint
Low‑Cobalt Co‑Mn Drier 4%Co 4%Mn CAS 136‑52‑7 is pre‑mixed primary drier containing 4% cobalt and 4% manganese metal carboxylates. Compared with standard high‑cobalt Co‑Mn drier, lower cobalt loading minimizes yellowing and discoloration for pale alkyd paints. Cobalt provides oxidative surface‑drying activity, manganese assists catalytic curing and improves through‑drying effect. This primary drier shall be combined with calcium, zirconium or other auxiliary driers to achieve complete curing per
Product Overview
Low‑Cobalt Co‑Mn Drier 4%Co 4%Mn CAS 136‑52‑7 belongs to pre‑formulated dual‑metal carboxylate primary drier specially optimized for pale alkyd paint applications. High‑cobalt driers easily cause yellowing and shade shift for white and light‑colored coatings. This product adopts reduced cobalt content to restrain discoloration while keeping sufficient catalytic drying capacity. Cobalt acts as main surface drier to trigger oxidative cross‑linking on paint film surface. Manganese synergistically promotes curing reaction and complements partial through‑drying function. It must be compounded with suitable auxiliary driers to avoid soft inner‑layer defects. It dissolves completely in aliphatic and aromatic hydrocarbon solvents, shows good compatibility with long‑oil and medium‑oil alkyd resins, maintains stable storage property and consistent batch‑to‑batch quality.
Key Features
‑ Pre‑blended 4% cobalt & 4% manganese low‑cobalt primary drier formula ‑ Low cobalt loading effectively reduces yellowing and discoloration for pale alkyd paints ‑ Moderate oxidative surface‑drying performance for light‑color coating systems ‑ Manganese synergistically enhances catalytic activity and supports partial through‑drying ‑ Serve as primary drier, match with Ca, Zr auxiliary driers for full curing system ‑ Good solubility in mineral spirits, xylene and conventional coating hydrocarbon solvents ‑ Suitable for white, off‑white and other light‑toned solvent‑borne alkyd formulations ‑ Reliable batch‑to‑batch consistency for mass‑production of pale decorative and industrial alkyd paints
Technical Specifications
‑ Product Name: Low‑Cobalt Co‑Mn Drier ‑ Active Metal: Cobalt 4% min, Manganese 4% min ‑ CAS No.: 136‑52‑7 ‑ Appearance: Reddish‑purple transparent liquid ‑ Solubility: Soluble in aliphatic, aromatic hydrocarbon solvents and alkyd resins, insoluble in water ‑ Density: 0.94‑1.00 g/cm³ @25℃ ‑ Viscosity: Low‑viscosity liquid ‑ Flash Point: ≥60℃ ‑ Moisture: ≤0.2%
Application Scenarios
‑ Pale, white and light‑colored solvent‑borne alkyd decorative paints ‑ Light‑shade industrial air‑drying alkyd enamels and top‑coats ‑ Long‑oil and medium‑oil alkyd varnish and pigmented light‑color coating systems ‑ Alkyd formulations requiring reduced cobalt level to mitigate discoloration ‑ Primary drier component cooperating with calcium, zirconium auxiliary driers
Usage Recommendation
‑ Typical dosage: 0.12%‑0.45% calculated on total paint weight based on total metal content ‑ Add under low‑speed mixing during pigment letdown stage ‑ Do not add during high‑temperature resin synthesis procedure ‑ Must cooperate with matched auxiliary driers to realize complete surface and through‑curing ‑ Anti‑skin agent shall be supplemented separately according to closed‑can storage requirement ‑ Adjust dosage according to drying speed, film color stability and through‑curing test results ‑ Excessive dosage will increase discoloration and skinning risk; complete full‑set laboratory assessment before mass‑scale production
Package & Storage
‑ Standard package: 25kg / 200kg metal drum ‑ Store in cool, dry and well‑ventilated warehouse, keep away from heat source and direct sunlight ‑ Tightly seal container after opening to prevent solvent volatilization and performance deterioration ‑ Shelf life: 12 months under proper storage conditions
Safety Notes
‑ Combustible liquid, keep away from all ignition sources. ‑ Avoid skin contact and eye splash. Wear chemical‑resistant gloves and safety goggles during handling. ‑ Avoid inhalation of vapor and mist, ensure effective local ventilation. ‑ Refer to SDS for full guidance on handling, transportation and emergency disposal.
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