CHLUMIUV® UV-928 CAS 73936-91-1

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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UV-928 Application scenarios

1. Powder Coatings:

Suitable for powder coatings requiring high-temperature curing, such as those used for home appliance casings and building materials, preventing photoaging, yellowing, and chalking of the coating, and improving weather resistance.

2. Coil Coatings:

Used in continuous coil coatings for pre-painted steel and aluminum composite panels, protecting against damage from outdoor ultraviolet radiation and extending the service life of the coil.

3. Automotive Coatings:

Applicable to automotive OEM coatings, refinish paints, and component coatings, protecting the coating and substrate and slowing down fading and loss of gloss caused by UV radiation.

4. General Industrial Coatings:

For acrylic, polyurethane, epoxy, and other industrial coatings, including furniture paints, construction machinery coatings, and anticorrosive coatings, enhancing the light resistance and durability of the coating.

5. Plastics and Polymer Materials:

Used in polyolefin products such as PP and TPO (thermoplastic polyolefin elastomer), as well as engineering plastics, preventing photo-oxidative aging, embrittlement, and discoloration of the products.

6. Inks and Printing:

Used in outdoor advertising inks and packaging printing inks, protecting ink colors and preventing fading and discoloration under sunlight.

7. Light Stabilizer Blends:

Often blended with hindered amine light stabilizers (such as UV-292, UV-123) to synergistically enhance light stabilization effects in coatings and plastics.

8. Films and Sheets:

Used in plastic films and sheets (such as food packaging films and agricultural films), reducing the impact of ultraviolet radiation on the film material and its contents.

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