Our High - Quality Lead Stearate, identified by the CAS number 1072 - 35 - 1, is a premium chemical product. Chemically, it is a salt composed of lead cations and stearate anions. It typically appears as a fine, white or yellowish - white powder with a characteristic waxy feel.
The product has a high degree of purity, ensuring its effectiveness in various applications. Its molecular formula is C36H70O4Pb, and the molecular weight is approximately 774.14 g/mol. It has a melting point in the range of 105 - 112 °C. The density of lead stearate is around 1.323 g/cm³. This product is insoluble in water and ethanol but soluble in hot benzene, chloroform and turpentine.
1. **PVC Stabilizer**: In the PVC industry, lead stearate is widely used as a heat stabilizer. It helps to prevent the degradation of PVC polymers during processing at high temperatures. By reacting with the hydrochloric acid released during PVC decomposition, it effectively extends the service life of PVC products, making them more resistant to heat, light, and aging.
2. **Lubricant**: It serves as an excellent lubricant in the production of plastics and rubber. It reduces friction between the polymer and the processing equipment, resulting in smoother processing, better surface finish of the final products, and reduced wear and tear on the machinery.
3. **Cosmetics and Personal Care Products**: In the cosmetics industry, lead stearate can be used in some formulations as an emulsifier or thickening agent. It helps to stabilize the emulsion and improve the texture of creams, lotions, and other cosmetic products.
When using lead stearate as a PVC stabilizer, it is usually added during the PVC compounding process. The recommended dosage is generally in the range of 0.5 - 3 parts per hundred parts of PVC resin, depending on the specific requirements of the PVC product, such as processing temperature, expected service life, and environmental conditions. For example, in applications where high - temperature processing is required, a higher dosage may be needed.
As a lubricant, it can be mixed with the polymer raw materials before processing. The amount should be optimized based on the type of polymer, processing method, and the desired lubrication effect. It is important to ensure uniform dispersion of lead stearate in the polymer matrix to achieve the best performance.
In cosmetics, it should be used in strict accordance with the relevant regulations for the use of cosmetics ingredients. The dosage should be carefully controlled to ensure product safety and quality.
**Case 1: PVC Pipes Production**
A PVC pipe manufacturing company was facing issues with the discoloration and brittleness of their pipes during high - temperature extrusion. After adding our high - quality lead stearate as a heat stabilizer at a dosage of 2 parts per hundred parts of PVC resin, the pipes showed significant improvement. The discoloration problem was largely eliminated, and the pipes became more flexible and durable. The company was able to increase its production efficiency due to reduced scrap rates and improved product quality, which led to increased customer satisfaction and market competitiveness.
**Case 2: Rubber Product Manufacturing**
A rubber product manufacturer was experiencing problems with mold sticking during the production of rubber seals. By using lead stearate as a lubricant, the friction between the rubber and the mold was greatly reduced. The demolding process became smoother, and the surface finish of the rubber seals was improved. This not only increased the production speed but also reduced the occurrence of surface defects on the rubber products, resulting in higher - quality products and lower production costs.
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