Lead stabilizer in PVC

Lead stabilizer in PVC Specification

Poisonous
Yes

Storage
Room Temperature

Form
Other

HS Code
38123

Application
Plastic

About Lead stabilizer in PVC

PVC composite stabilizers are multifunctional stabilization systems specifically designed for polyvinyl chloride (PVC) processing. They are not single chemicals, but rather physical mixtures or chemical combinations of multiple functional components. Their core function is to prevent PVC resin from degrading and discoloring due to heat, light, and oxygen during processing and use.

1. Essence and Purpose:

Essence: A "formulation package" or "one-stop" stabilization solution.

Core Purpose: To efficiently and synergistically stabilize PVC, preventing molecular chain breakage (thermal degradation) during high-temperature processing (such as extrusion, calendering, and injection molding), which leads to yellowing, blackening, and decreased mechanical properties.

2. Main Components (typically containing the following four categories of components):

Primary Stabilizer: Provides basic stabilization. The most common is the calcium/zinc (Ca/Zn) complex, an environmentally friendly and non-toxic "green" stabilizer that has widely replaced traditional lead and cadmium salts. Other complexes are based on tin, antimony, etc.

Auxiliary (Synergistic) Stabilizers: Such as -diketones, polyols, phosphites, etc. While these stabilizers themselves have weak stabilizing effects, when combined with primary stabilizers (especially calcium and zinc), they can significantly improve thermal stability and early colorfastness, achieving a "1+1>2" effect.

Lubricants: such as polyethylene wax, oxidized polyethylene wax, stearic acid, etc. This is one of the key advantages of composite stabilizers; they integrate internal/external lubrication functions, ensuring that PVC is uniformly plasticized in processing equipment and can be easily demolded, preventing sticking to rollers.

Other functional additives: Antioxidants, light stabilizers, processing aids, etc., may be added as needed.

3. Key Advantages:

Ease of Use: Users only need to add one product, simplifying the batching process and reducing the risk of weighing errors and uneven mixing.

Superior Performance: Through scientific component compounding, the components produce a synergistic effect, and their overall stabilizing effect and processing performance are generally superior to using a single stabilizer.

Optimized Formulation: Manufacturers have determined the optimal ratio through extensive experimentation, providing users with a balanced and reliable "optimal solution." Environmental Friendliness: Mainstream products (such as high-performance calcium-zinc composite stabilizers) are free of heavy metals and comply with global environmental regulations (such as RoHS and REACH), making them suitable for use in sensitive areas such as food contact, medical products, and toys.

4. Main Application Areas:

Building Materials: Door and window profiles, pipes, fittings, flooring, wall panels.

Flexible Products: Wire and cable materials, artificial leather, waterproof membranes, hoses.

Transparent Products: Bottle flakes, shrink film, cards, etc. (using organotin composite stabilizers).

Others: Injection molded products, foamed products, etc.

Summary: PVC composite stabilizers are core additives in the modern PVC industry. By integrating multiple functional components such as stabilizers and lubricants, they provide users with an efficient, convenient, environmentally friendly, and high-performance stabilization solution, which is crucial for ensuring the quality and production efficiency of PVC products.

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