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The effectiveness of Dibasic Lead Stearate (DBLS) as a primary additive in PVC processing stems from its unique chemical structure and properties. Understanding this chemistry is key to appreciating its performance benefits, including exceptional heat resistance and lubrication. NINGBO INNO PHARMCHEM CO.,LTD. provides an overview of the fundamental attributes that make DBLS a cornerstone in polymer additive formulations.
Chemically, Dibasic Lead Stearate is a lead soap, derived from the reaction of stearic acid with lead oxide. Its formula, often represented in various ways due to its complex basic structure, essentially involves lead atoms bonded to stearate groups and oxygen (or hydroxyl) groups. This composition is crucial for its function. The lead ions are highly effective at scavenging the free chlorine atoms released from PVC when it is heated. This reaction neutralizes the acidic byproducts, thereby inhibiting the degradation cascade that leads to PVC breakdown. The presence of the stearate chain also imparts lubricating properties.
The technical specifications of DBLS, such as its high PbO content (typically 54-57%), low loss on heating, and minimal free fatty acid content, are indicators of its purity and efficacy. A high fineness (e.g., 98% passed through 120 mesh) ensures good dispersibility within the PVC matrix, which is critical for uniform stabilization and lubrication throughout the material. When manufacturers consider where to buy Dibasic Lead Stearate, these technical parameters are vital checkpoints for ensuring product quality. The Dibasic Lead Stearate price is often correlated with these quality indicators, reflecting the purity and processing required.
The specific chemical interactions of DBLS provide superior heat stability compared to some other stearates, making it ideal for rigid PVC applications that undergo demanding processing conditions. Furthermore, its role as a lubricant is not merely physical; the stearate portion of the molecule interacts with the PVC polymer chains to reduce melt viscosity and improve flow. This dual mechanism – chemical stabilization and physical lubrication – is what sets DBLS apart. When combined with other stabilizers like tribasic lead sulfate, the synergistic effects can further enhance properties like weather resistance and processability. NINGBO INNO PHARMCHEM CO.,LTD. consistently delivers DBLS that meets these stringent technical requirements.
NINGBO INNO PHARMCHEM CO.,LTD. stresses that a thorough understanding of Dibasic Lead Stearate's chemical properties allows manufacturers to leverage its full potential. Its well-defined chemical structure and resulting performance characteristics cement its status as a fundamental additive in the PVC industry, contributing significantly to the creation of high-quality, durable plastic products.
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1. 20 years of R&D, manufacturing and sales experience, serving customers in 60 countries and regions around the world;
2. Own R&D laboratory, pilot platform and large-scale production workshop, which can meet the audit requirements of global customers;
3. We can satisfy customers' perfect transition from small scale lab requirements (gram level) to commercialization requirements (hundred tons level).
A: We don't have Minimum Order Quantity, exact quantity should be provided before quotation for us to calculate the exact cost.
A: We don't provide free samples due to lots of request and expensive international courier's cost, we can deduct the sample charge after commercial order placed.
A: Our payment terms: Small or sample order: T/T IN ADVANCE. Commercial order: First order should be by T/T IN ADVANCE or L/C at sight, and following orders T/T 30~90days is acceptable subject to approval of credit application.
