High Quality Dibasic Lead Stearate with CAS number 56189 - 09 - 4 is a fine - white powder product. It has a molecular formula of C36H70O4Pb and a molecular weight that can be calculated based on its atomic composition. The melting point of this product typically ranges from 103 - 110°C, giving it good thermal stability.
In terms of solubility, it is insoluble in water but soluble in hot ethanol and ether. The density of dibasic lead stearate is around 1.323 g/cm³. This product is usually supplied in high - purity form, ensuring excellent performance in various applications. The high - quality standard of this dibasic lead stearate is reflected in its consistent particle size distribution, which is crucial for its effective use in different industries.
Dibasic lead stearate has a wide range of applications in different industries. In the plastics industry, it is commonly used as a heat stabilizer. It can prevent the degradation of plastics caused by heat during the processing and long - term use of plastic products. For example, in PVC (Polyvinyl Chloride) pipes and profiles, dibasic lead stearate helps maintain the mechanical and physical properties of the PVC, such as its strength and flexibility, even when exposed to high temperatures for an extended period.
In the rubber industry, it serves as an acid acceptor and a lubricant. As an acid acceptor, it can neutralize the acidic substances generated during the rubber vulcanization process, which helps to improve the quality and stability of the rubber products. As a lubricant, it reduces the friction between rubber and processing equipment, facilitating the smooth processing of rubber products.
In the paint and coating industry, dibasic lead stearate can be used as a drier and a rheology modifier. It promotes the drying process of paint and coatings, and also helps to adjust the viscosity and flow properties of the paint, ensuring a smooth and uniform coating surface.
When using dibasic lead stearate in the plastics industry, it should be added during the plastic compounding process. The recommended addition amount is usually in the range of 0.5 - 2% based on the weight of the plastic resin. It can be mixed with other additives and the plastic resin in a high - speed mixer to ensure uniform dispersion. After mixing, the compound can be further processed by extrusion, injection molding, or other plastic processing methods.
In the rubber industry, it can be added during the rubber mixing process on a two - roll mill or an internal mixer. The amount of dibasic lead stearate added depends on the specific rubber formulation and the processing requirements, typically ranging from 0.3 - 1.5 parts per hundred parts of rubber (phr). It should be added gradually during the mixing process to ensure good dispersion in the rubber matrix.
In the paint and coating industry, it can be added during the paint manufacturing process. First, it can be pre - dispersed in a suitable solvent or resin system, and then added to the main paint formulation. The addition amount is usually adjusted according to the desired drying speed and rheological properties of the paint, generally ranging from 0.1 - 1% of the total paint weight.
Case 1: A plastic pipe manufacturing company was facing the problem of PVC pipe degradation during the extrusion process at high temperatures. The pipes showed signs of discoloration and reduced mechanical strength. After adding high - quality dibasic lead stearate at a dosage of 1.2% by weight of the PVC resin, the company observed a significant improvement. The pipes maintained their original color and mechanical properties during the extrusion process and also showed better long - term stability in outdoor applications.
Case 2: A rubber tire manufacturer was experiencing problems with the vulcanization process of their tires. The acidic by - products generated during vulcanization were affecting the quality of the tires. By adding dibasic lead stearate at a dosage of 1 phr, the acid was effectively neutralized. The tires had better uniformity in hardness and improved overall performance, such as better traction and wear resistance.
Case 3: A paint manufacturer was trying to improve the drying time and surface smoothness of their water - based paints. After adding dibasic lead stearate at a
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