PVC Stabilizer

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PVC Stabilizer is a crucial additive used in the processing of polyvinyl chloride (PVC) to protect it from thermal degradation during manufacturing and throughout its service life. It ensures color stability, prevents chain scission, and enhances the durability of PVC products exposed to heat, light, and mechanical stress. PVC stabilizers are available in various types, including lead-based, calcium-zinc (Ca-Zn), organotin, and mixed metal stabilizers, each suited for different applications depending on regulatory, environmental, and performance requirements.

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Categories: Additives, PAINT & COATINGS CHEMICALS, PLASTICS AND POLYMER MANUFACTURING CHEMICALS, Stabilizers (UV, Heat) Tags: Heat Stabilizer for PVC, Plastic & Polymer Industry, PVC Additive, PVC Stabilizer

Description

Table of Contents

PVC Stabilizer

Primary Uses

PVC Pipe and Fitting Manufacturing
Prevents discoloration and degradation of rigid PVC during high-temperature extrusion and molding.

Enhances long-term thermal and mechanical stability in pressure and drainage pipe systems.

Window and Door Profiles
Provides UV and heat resistance in exterior PVC profiles used in construction.

Ensures weatherability and color retention over extended exposure to sunlight.

Cable and Wire Sheathing
Used in flexible PVC for electrical insulation and sheathing to resist thermal degradation.

Maintains electrical properties and plasticity under heat from electrical currents.

Rigid and Flexible Films
Stabilizes calendared PVC films used in packaging, stationery, and decorative applications.

Prevents fogging, discoloration, and embrittlement in clear and colored films.

Synthetic Leather and Flooring
Ensures flexible PVC materials maintain surface finish and mechanical strength under heat and stress.

Prevents brittleness and cracking over time in coated fabrics and flooring tiles.

Injection Molding
Supports processing of PVC in molded applications such as fittings, containers, and caps.

Helps maintain gloss, color, and dimensional stability during thermal cycling.

Secondary Uses

Medical Devices (with Non-toxic Grades)
Used in the production of IV tubes, blood bags, and medical films where non-toxic Ca-Zn or organotin stabilizers are required.

Toys and Childcare Products
Utilized in soft PVC toys and baby care goods with non-lead stabilizers compliant with safety standards.

Automotive Interiors
Provides long-term color stability and thermal resistance in PVC dashboards, door panels, and trims.

Adhesives & Sealants
Incorporated into PVC-based adhesives to maintain stability under heat curing or prolonged use.

Tarpaulins, Coated Fabrics, and Tents
Ensures mechanical strength and UV resistance in outdoor fabric coatings.

Ink & Paint Formulations (PVC-based)
Helps maintain clarity and viscosity control in formulations that involve PVC resins and need thermal resistance.

PRODUCT KEY FEATURES

Basic Identification Attributes
Chemical Name (IUPAC): Varies by type (e.g., calcium-zinc carboxylates, dibutyltin maleate, lead stearate)

Common/Trade Name: PVC Stabilizer

CAS Number: Varies depending on composition

HS Code: 3812.30.00

Synonyms: Heat stabilizer; thermal stabilizer for PVC; PVC processing aid

Physical & Chemical Properties
Physical State: Powder, flakes, granules, or liquid depending on formulation

Color & Odor: White/off-white (solid) or colorless (liquid); slight to no odor

Solubility: Insoluble in water; dispersible in plasticizers or solvents

Melting Point: Varies; typically above 100°C for solids

Density: 1.0 – 1.5 g/cm³ depending on formulation

Safety & Hazard Attributes
GHS Classification: Varies—some types may be hazardous (e.g., lead-based); others non-toxic (e.g., Ca-Zn)

Toxicity: Depends on composition; non-toxic grades available for sensitive applications

Exposure Limits: Follow safety data sheets and local exposure regulations

Storage & Handling Attributes
Storage Conditions: Store in original, tightly closed containers in a dry, cool area away from moisture and heat sources

Container Type: 25 kg bags, drums, or intermediate bulk containers (IBCs)

Shelf Life: 12–24 months under proper storage conditions

Handling Precautions: Avoid inhalation of dust or vapors; use dust extraction and protective equipment

Regulatory & Compliance Attributes
Non-toxic types (Ca-Zn, organotin) may comply with FDA, EU (REACH), and RoHS standards

Lead-based stabilizers are restricted or banned in many regions for consumer or food contact products

Produced under ISO 9001 or GMP-certified systems for specialty applications

Environmental & Health Impact
Biodegradability: Not biodegradable

Ecotoxicity: Lead and cadmium-based stabilizers are toxic; Ca-Zn and organotin grades have low ecological impact

Bioaccumulation: Minimal for most modern stabilizers; legacy types may pose long-term risks

SAFETY HANDLING PRECAUTIONS

PPE Required: Safety goggles, gloves, dust mask or respirator, protective clothing

Handling Guidelines: Ensure good ventilation; avoid generating dust; use grounded equipment when transferring powders