BASF Tinuvin 320 Benzotriazole UV Absorber

Features Of BASF Tinuvin 320 Benzotriazole UV Absorber

1. Highly effective UV absorber based on the benzotriazole chemical class, offering strong absorption in the critical 290–400 nm UV range.

2. Excellent thermal and hydrolytic stability, ensuring consistent performance during high-temperature polymer processing and long-term outdoor exposure.

3. Good compatibility with a broad range of polymers including polyolefins, PVC, engineering plastics, and coatings.

4. Low volatility and minimal migration, supporting durable protection in thin films and demanding end-use environments.

5. Non-discoloring performance—maintains clarity and color fidelity in transparent and light-colored applications.

Typical Applications Of BASF Tinuvin 320 Benzotriazole UV Absorber

1. Automotive interior parts (e.g., instrument panels, trim, air vents) requiring long-term UV resistance and low VOC emission.

2. Exterior plastic components such as bumpers, grilles, and mirror housings exposed to intense sunlight and weathering.

3. Polyolefin-based agricultural films, greenhouse covers, and geomembranes requiring extended UV durability.

4. Coatings for metal and plastic substrates, including coil coatings and architectural finishes.

5. PVC profiles, window frames, and siding where thermal stability and color retention are critical.

Specifications Of BASF Tinuvin 320 Benzotriazole UV Absorber

BASF Tinuvin 320 Benzotriazole UV Absorber – Frequently Asked Questions (FAQ)

Q1: What is the primary function of Tinuvin 320 in polymer systems?

A: Tinuvin 320 is a benzotriazole-based ultraviolet (UV) absorber designed to protect organic materials—especially polymers—against photodegradation caused by UV radiation. It functions by absorbing harmful UV light (primarily in the 290–400 nm range) and dissipating it as low-level heat, thereby preserving color, mechanical properties, and surface integrity during outdoor exposure.

Q2: In which polymer types is Tinuvin 320 most commonly used?

A: Tinuvin 320 exhibits good compatibility and performance in a broad range of thermoplastics and thermosets, including polyolefins (e.g., PP, HDPE), engineering plastics (e.g., ABS, PC blends), coatings, adhesives, and elastomers. Its thermal stability and low volatility make it especially suitable for medium- to high-temperature processing applications.

Q3: How does Tinuvin 320 compare to hindered amine light stabilizers (HALS) in terms of mechanism and use?

A: Tinuvin 320 acts as a preventive UV absorber, physically filtering UV radiation before it initiates degradation. In contrast, HALS are radical scavengers that interrupt degradation pathways after photochemical initiation. They are often used synergistically—Tinuvin 320 reduces initial UV damage, while HALS suppress subsequent oxidative processes—resulting in enhanced overall stabilization performance.

Q4: What are key handling and processing considerations for Tinuvin 320?

A: Tinuvin 320 is supplied as a free-flowing crystalline powder with good thermal stability up to typical polymer processing temperatures. It should be handled in well-ventilated areas, avoiding inhalation of dust. For optimal dispersion, pre-blending or masterbatch incorporation is recommended. Dosage generally ranges from 0.1% to 2% by weight, depending on substrate, required protection level, and exposure conditions.

Q5: Is Tinuvin 320 suitable for applications requiring regulatory compliance for indirect food contact?

A: Tinuvin 320 is not intended for direct food contact applications. Its suitability for indirect food contact depends on regional regulatory frameworks and specific formulation context; users must conduct their own evaluation against applicable regulations and consult BASF’s technical documentation and regulatory support resources prior to use in such applications.