CHLUMIUV® UV-928 CAS 73936-91-1

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UV-928 Application scenarios

1. High-Performance Coatings

This is its most core and prominent application area. Thanks to its excellent thermal stability and good solubility, it is particularly suitable for coating systems requiring high-temperature curing.

– Powder Coatings

Prevents decomposition during high-temperature baking, effectively protecting the coating from loss of gloss, discoloration, and cracking.

– Coil Coatings (Coated Steel)

Used for pre-coated metal coils, providing long-term weather protection.

– Automotive Coatings

Used in original equipment manufacturer (OEM) paints or refinish paints to improve the long-term weather resistance and anti-yellowing properties of the paint surface.

– Other Industrial Coatings

The general addition amount is 1.0% – 3.0% of the total weight of the formula, and it is often used in combination with hindered amine light stabilizers (such as UV-292) for better results.

2. High-End Engineering Plastics

Used as a high-efficiency light stabilizer to protect the mechanical properties and appearance of plastics.

– Polycarbonate (PC)

Significantly improves the anti-yellowing ability of polycarbonate.

– Polyesters (such as PBT, PET)

Prevents strength and color degradation caused by ultraviolet light.

– Polyamide (PA, Nylon), Polyoxymethylene (POM), Polyphenylene Sulfide (PPS), etc.

The recommended addition amount is usually between 0.15% and 0.60%.

3. Agricultural Films

Added to agricultural plastic films, it can absorb some ultraviolet light, extending the service life of the film while also helping to create a more suitable growth and development environment for certain crops.

4. Adhesives and Sealants

Used in adhesives and sealants that require long-term outdoor use or may be affected by sunlight, preventing aging and failure due to ultraviolet radiation.

5. Scientific Research Applications

This compound is also provided as a biochemical reagent, mainly used in related light stabilization mechanism research and material development experiments.

Description

UV-928 CAS 73936-91-1

Appearance light yellow crystal
Content ≥98%
Melting point 108-112°C
Volatile matter ≤ 0.3%
Ash ≤ 0.1%
Light transmittance: 460nm: ≥ 97%
500nm: ≥98%

UV-928 Usage

1. UV absorber UV-928 is a benzotriazole UV absorber, capable of absorbing 270-380nm UV light, with peak absorption of 303nm and 343nm. It has good compatibility, low volatility, good dispersibility, low migration, good thermal stability and high absorption efficiency. It is suitable for high temperature curing systems, powder coatings, coil steel coatings, and especially for surface coating of coatings. Combined with light stabilizers UV292 and UV123, it can significantly improve the durability of the coating and inhibit the loss of light, discolouration, cracking and delamination of the coating. The general dosage is 1.0-3.0%.

2. Applicable to: UV absorber for high performance coatings. With a wide range of absorption properties, it can effectively protect coatings and other photosensitive materials. Also has high solubility, high temperature resistance and good environmental durability, especially suitable for high temperature curing systems, such as powder coatings, coil steel coatings, etc.

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