LEAD STEARATE
1. Appearance
White powder
2. Molecular structure
RCOOPbOOCR (R is a mixed alkyl of industrial stearic acid)
3. Properties
Lead stearate is white fine powder, density of 1.323g/cm3, melting point 103℃, insoluble in alcohol, soluble in diethyl ether and slightly soluble in water. Cooling into jelly after heating dissolve in organic solvents. In acid decomposing into stearic acid and corresponding lead salt.
4. Technical Index
HG 2337-1992 Standard
ITEM | High-class | First-class | Qualified |
Lead content(Pb),% | 27.5±0.5 | 27.5±1.0 | 27.5±1.5 |
Free acid (in terms of hard acids)%,≤ | 0.8 | 1.0 | 1.5 |
Loss on Heating %,≤ | 0.3 | 1.0 | 1.7 |
Melting point,℃ | 103~110 | 100~110 | 98~110 |
Fineness(0.075mm Aperture sieve)%,≤ | 99.0 | 98.0 | 95.0 |
5. Usage
Lead stearate as a stabilizer and lubricant for PVC, thickening agent for grease, flatting agent for paint, driers for lacquer and paint, etc.
6. Packaging and storage
25kg/bag, normal temperature and dry storage.