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The Uses And Benefits Of Tinuvin 328: A Type Of Light Stabilizer

What is Tinuvin 328 and its application?


Tinuvin 328, also known as UV-328, is a highly effective ultraviolet light absorber used predominantly in the plastics industry. It is characterized by its strong absorbance in the 300-400 nm range, making it particularly suitable for applications requiring improved weatherability. The compound’s primary function is to absorb harmful UV radiation, converting it into harmless heat, which is then dissipated. This prevents the degradation of polymers, thus extending the lifespan of plastic products.


Overview of Tinuvin 328 properties

Tinuvin 328 possesses several key properties that make it an excellent choice for UV protection. Firstly, it has a high absorption capacity within the UV spectrum, specifically between 300-400 nm. Secondly, it exhibits excellent light stability, which prevents color changes and preserves the integrity of the material. Lastly, it has high thermal stability, making it suitable for applications that require resistance to high temperatures.


Recommended application areas for Tinuvin 328

Tinuvin 328 is widely used across various industries due to its versatile nature. It finds extensive application in areas such as automotive parts, construction materials, and packaging. In the automotive industry, it’s used in the manufacturing of interior and exterior parts to prevent fading and cracking due to UV exposure. In construction, it’s used in PVC profiles and roofing materials for enhanced durability. In packaging, it’s used to prevent discoloration and maintain product quality.


Benefits of using Tinuvin 328 in products

Incorporating Tinuvin 328 in products offers numerous benefits. It enhances the lifespan of products by preventing UV-induced degradation, maintains the aesthetic appeal of products by preventing discoloration, and improves the overall performance of materials by boosting their resistance to weathering. Its use leads to cost savings over time, as the need for product replacement due to UV damage is significantly reduced.


Chemical composition of Tinuvin 328

Tinuvin 328 is chemically known as 2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol. It belongs to the class of benzotriazoles, which are renowned for their UV absorbing capabilities. Its chemical structure allows it to effectively absorb and dissipate UV radiation, thereby providing excellent protection against UV-induced degradation.


Physical properties of Tinuvin 328

Tinuvin 328 is a slightly yellowish powder with a molecular weight of 351.5 g/mol. It has a melting point range of 80-86°C and is soluble in most organic solvents. Its physical properties, combined with its UV absorption capabilities, make it an excellent choice for enhancing the durability and lifespan of various products.

Physical properties of Tinuvin 328
Physical properties of Tinuvin 328

How does Tinuvin 328 enhance product performance?


Tinuvin 328, commonly known as UV-328, is a light stabilizer utilized mainly in the plastics industry. It absorbs ultraviolet radiation in the range of 300-400 nm and converts it into harmless heat, which is subsequently dissipated, hence preventing the deterioration of polymers. This process significantly enhances the performance and longevity of plastic products exposed to sunlight or artificial lighting.


Stabilization of styrene using Tinuvin 328

Styrene-based polymers are particularly vulnerable to degradation caused by UV radiation. The addition of Tinuvin 328 to styrene formulations offers efficient stabilization against UV-induced degradation. It effectively absorbs harmful UV rays, hence preventing color changes, brittleness, and cracking that can occur due to prolonged exposure to sunlight.


Recommended uses in polyolefin and elastomer materials

In polyolefin and elastomer materials, Tinuvin 328 serves as an effective UV absorber. Polyolefins, including polyethylene and polypropylene, and elastomers such as rubber, are susceptible to UV degradation. The incorporation of Tinuvin 328 ensures these materials maintain their physical properties, color, and overall integrity when exposed to UV radiation.


Compatibility of Tinuvin 328 with different substrates

Tinuvin 328 is compatible with a wide range of substrates. Its broad compatibility makes it suitable for use in various applications, including PVC, unsaturated polyesters, acrylics, urethane elastomers, and specific engineering plastics. This versatility allows for its use in diverse industries, from automotive to construction and packaging.


Impact of Tinuvin 328 on the physical and chemical properties of polymers

The inclusion of Tinuvin 328 in polymer formulations positively impacts both the physical and chemical properties of the final product. Physically, it helps maintain flexibility, tensile strength, and color stability under UV exposure. Chemically, it prevents oxidation, chain scission, and cross-linking reactions that can occur under UV radiation, thus preserving the polymer’s molecular structure.


Recommended additives for Tinuvin 328 in coating formulations

In coating formulations, Tinuvin 328 is often combined with other additives to enhance its effectiveness. These may include antioxidants, which prevent thermo-oxidative degradation, and HALS (Hindered Amine Light Stabilizers), which neutralize free radicals generated by UV exposure. This combination creates a synergistic effect, resulting in superior protection against both UV and thermal degradation.

Recommended additives for Tinuvin 328 in coating formulations
Recommended additives for Tinuvin 328 in coating formulations

Where can Tinuvin 328 be used?


Tinuvin 328, a high-performing ultraviolet light absorber, is widely used in the plastics industry due to its ability to protect polymers from UV-induced degradation. It absorbs harmful UV radiation within the 300-400 nm range and converts it into heat, which is then dissipated. This process significantly extends the lifespan of plastic products and maintains their aesthetic appeal and performance over time.


Application of Tinuvin 328 in industrial materials

In the industrial sector, Tinuvin 328 is applied to a variety of materials for enhanced durability and UV resistance. Key applications include:


  1. Automotive parts: Both exterior and interior components benefit from the UV protection offered by Tinuvin 328.
  2. Construction materials: Products like PVC profiles and roofing materials gain improved weatherability with the addition of Tinuvin 328.
  3. Packaging: Tinuvin 328 helps prevent discoloration and maintains product quality in various packaging materials.

Design recommendations for Tinuvin 328 incorporation

Incorporating Tinuvin 328 into product designs requires consideration of several factors:


  1. Material type: Tinuvin 328 is compatible with a wide range of substrates, from PVC to acrylics and certain engineering plastics.
  2. Processing conditions: Tinuvin 328 has high thermal stability, making it suitable for processes involving high temperatures.
  3. Desired lifespan: The amount of Tinuvin 328 used should correlate with the expected lifespan of the product under UV exposure.

Product examples where Tinuvin 328 can be utilized

Tinuvin 328 can be used in a variety of products across different industries. Some examples include:


  1. Automotive parts: Dashboards, bumpers, and other exterior and interior parts.
  2. Construction materials: PVC window profiles, roofing materials, and exterior wall panels.
  3. Packaging: Plastic containers, films, and other packaging materials.

Usage of Tinuvin 328 in adhesive and sealant products

Tinuvin 328 is also used in adhesive and sealant products due to its excellent UV-absorbing capabilities. Some examples include:


  1. Construction sealants: Tinuvin 328 helps maintain the performance and appearance of sealants used in construction.
  2. Adhesives: In both industrial and consumer adhesives, Tinuvin 328 helps prevent degradation caused by UV exposure.

Specific information regarding the use of Tinuvin 328 in different industries

In the automotive industry, Tinuvin 328 is used to enhance the UV resistance of both interior and exterior parts, preventing fading and cracking. In the construction industry, it’s used in PVC profiles and roofing materials for enhanced durability. In the packaging industry, it’s used to maintain product quality by preventing discoloration due to UV exposure. Its wide-ranging compatibility with different substrates makes it a versatile choice for many applications across various industries.




  1. Tinuvin® 328 – BASF: This technical datasheet from BASF, the manufacturer of Tinuvin 328, provides detailed product information, including its application and chemical properties.
  2. Tinuvin® light stabilizers – BASF: Another resource from BASF, this webpage provides an overview of Tinuvin light stabilizers and their benefits, including their ability to trap free radicals and maintain surface properties.
  3. Tinuvin® 328 [Light Stabilizer] by BASF – Polymer Additives: This page provides an overview of Tinuvin 328 as a polymer additive, highlighting its use in articles, films, sheets, and fibers during outdoor weathering.
  4. UV-328 – ECHA: The European Chemicals Agency (ECHA) provides comprehensive information about UV-328 (Tinuvin 328), including its applications in plastic shrink films, outdoor furniture, and automotive finishes.
  5. Tinuvin 328 – Reena Organics: This document provides specific information on how Tinuvin 328 should be used in outdoor applications, emphasizing the need for its combination with a hindered amine light stabilizer (HALS).
  6. UV-Absorber-328 – Hunan Chem: This source highlights the use of Tinuvin 328 alone or in combination with other additives such as light stabilizers and antioxidants.
  7. UV-328 – Wikipedia: This Wikipedia entry provides an overview of UV-328, its recommended use for the stabilization of styrene homopolymers, and other related information.
  8. UN experts take steps to recommend eliminating UV-328 …: This article from the Stockholm Convention discusses the ubiquity of UV-328 as a UV stabilizer in plastic products and the potential environmental implications.
  9. Tinuvin 328 – Chemnet: This source provides insights into the advantages of Tinuvin 328 as a light stabilizer, including its stable performance, low toxicity, and ultraviolet solid absorbability.
  10. Tinuvin 328 – Product Info: Cambridge Polymer Group provides a comprehensive overview of Tinuvin 328, including its structure, properties, and applications.

Recommended reading: Sourcing Tinuvin 328 & UV 328 from China – Professional Quality Assured!

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