Introduction
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Basic Information
Cobalt stearate (also called cobalt octadecanoate) is an organic compound. Its chemical formula is C₃₆H₇₀CoO₄
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Physical Properties
| Appearance | Purple granules or small spherical solids |
| Density | 1.13 g/mL (25 °C) |
| Melting point | 73‑75 °C |
| Boiling point | 359.4 °C |
| Flash point | 162.4 °C |
| Solubility | Soluble in ether, insoluble in water |
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Synthesis Methods
Precipitation reaction between sodium stearate and cobalt chloride solution.
Double‑decomposition reaction: first saponify stearic acid with sodium hydroxide to prepare soap solution, then proceed with the reaction.
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Storage Requirements
Keep tightly sealed and store in a cool, dry environment at 2‑8 °C.
Specification
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Composition |
85-90% organic acid |
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10-15% cobalt qualification |
Appearance of blue and purple particles Cobalt content% 9.60 ± 0.6 |
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Heating reduction by% |
105℃ ≤1.5 |
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Final melting point% |
00-100 |
Key Product Advantages
This product features easy dissolution, good dispersibility, convenient metering, simple operation and hassle‑free transportation. It delivers outstanding adhesion for rubber‑to‑brass bonding systems, galvanized steel wires, tire cords and ropes. Additionally, it possesses distinctive resistance against thermal‑oxidative ageing, salt water, moisture and corrosion.
Application
- Heat stabilizer for polyvinyl chloride (PVC).
- Pigment stabilizer for ceramic products.
- Oxidation catalyst for organic synthesis.
- Active drier for coating systems.
- Widely applied in radial tires, steel‑wire reinforced conveyor belts and metal‑rubber composite articles.
Storage and warranty period:
Cool, dry place, the original packaging sealed storage for 1 year.
Packaging
Lined with plastic bag carton.
FAQ
Q1: What are the main industrial functions of cobalt stearate?
It serves four core industrial functions: a high-efficiency heat stabilizer for PVC materials, a professional pigment stabilizer for ceramic production, an oxidation catalyst for organic synthesis reactions, and an active drying agent for various coating products. Its multi-functional properties make it a versatile additive across polymer, ceramic and chemical industries.
Q2: Why is cobalt stearate widely used in rubber and metal-rubber composite products?
Cobalt stearate exhibits excellent interfacial bonding performance for metal and rubber materials. It is specially applicable to radial tires, steel wire conveyor belts and other metal-rubber composite products, effectively enhancing the bonding fastness between steel wire and rubber, and improving the overall durability and service life of finished industrial rubber products.
Q3: How does cobalt stearate improve the performance of coatings and ceramics?
In coating systems, it acts as an active drier to accelerate curing speed, improve film-forming efficiency and enhance coating surface uniformity. In ceramic production, it stabilizes pigment components, prevents pigment discoloration and fading during high-temperature firing, and greatly improves the color stability and yield of ceramic products.
Q4: What makes cobalt stearate an ideal catalyst for organic synthesis?
With unique chemical activity, cobalt stearate can efficiently promote oxidation reactions in organic synthesis. It features stable catalytic activity, mild reaction conditions and no impurity residue, which optimizes the reaction process, improves production efficiency and reduces side reactions in fine chemical synthesis.
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