23328-53-2

Basic information

• Product Name: TINUVIN 571
• Synonyms: 2-(2H-benzotriazo-2-yl)-6-dodecyl-4-methyl-Phennol;TINUVIN 571;Phenol, 2-(2H-benzotriazol-2-yl)-6-dodecyl-4-methyl-;2-(2H-Benxotriazol-2-yl)-4-methyl-(5 or 6)-dodecyl phenol;2-(2H-Benzotriazol-2-yl)-6-dodecyl-p-cresol;(2-Hydroxy-3-dodecyl-5-methylphenyl)benzotriazole;2-(3-Dodecyl-2-hydroxy-5-methylphenyl)benzotriazole;2-(3'-Dodecyl-5'-methyl-2'-hydroxyphenyl)benzotriazole
• CAS NO: 23328-53-2
• Molecular Formula: C25H35N3O
• Molecular Weight: 393.5649
• EINECS: 401-680-5
• Mol File: 23328-53-2.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 545.1 °C at 760 mmHg
• Flash Point: 283.4 °C
• Appearance: clear viscous yellow liquid
• Density: 1.07
• PKA: 8.40±0.50(Predicted)
• CAS DataBase Reference: TINUVIN 571(CAS DataBase Reference)
• NIST Chemistry Reference: TINUVIN 571(23328-53-2)
• EPA Substance Registry System: TINUVIN 571(23328-53-2)

Safety Data

• Hazardous Substances Data: 23328-53-2(Hazardous Substances Data)

Usage

Description

Tinuvin 571, also known as a liquid benzotriazole UV absorber, is a chemical compound that provides excellent light stability to a wide range of polymers. It is characterized by its high compatibility with various substrates, low volatility at elevated temperatures, and high absorption and protection efficiency. Tinuvin 571 is highly soluble in many solvents, monomers, or intermediates and can be easily emulsified in water-based adhesives.

Uses

Used in Thermoplastic PUR:
Tinuvin 571 is used as a UV stabilizer for thermoplastic PUR to enhance its light stability and protect it from degradation caused by exposure to sunlight or artificial light sources.
Used in Paints and Foams:
Tinuvin 571 is used as a light stabilizer in the paint and foam industry to improve the durability and longevity of these products by preventing them from discoloration and degradation due to UV exposure.
Used in PPVC, PVB, PMMA, PVDC, EVOH, EVA, and Thermosetting Unsaturated Resins:
Tinuvin 571 is used as a UV absorber in various polymers such as PPVC, PVB, PMMA, PVDC, EVOH, EVA, and thermosetting unsaturated resins to provide protection against UV-induced degradation and improve their overall performance.
Used in PA, PET, PUR Webs, and PP Fiber:
Tinuvin 571 is used as a UV stabilizer in the production of PA, PET, PUR webs, and PP fiber to enhance their resistance to UV radiation, ensuring their long-term stability and performance.
Used in Latex, Waxes, Adhesives, Homogeneous Polystyrene, and its Copolymers:
Tinuvin 571 is used as a UV stabilizer in latex, waxes, adhesives, homogeneous polystyrene, and its copolymers to improve their resistance to UV-induced degradation and maintain their properties over time.
Used in Elastomers and Polyolefins:
Tinuvin 571 is used as a UV stabilizer in elastomers and polyolefins to provide protection against UV radiation, ensuring their long-term stability and performance in various applications.

benefits

Tinuvin 571 is highly soluble in many solvents, monomers, or intermediates and easily emulsifiable in water-based adhesives. It can be considered for use during polymerization as well as for topical applications on PVC sheets. Tinuvin 571 features high compatibility in various substrates, low volatility even at elevated temperatures, and high absorption and protection efficiency.

Upstream product

• 112-41-4 1-dodecene 
• 2440-22-4 2-(2-Hydroxy-5-methylphenyl)benzotriazole 

Relevant articles and documents

Preparation method of ultraviolet absorber UV-571

The invention relates to a preparation method of an ultraviolet absorber UV-571. The preparation method comprises the steps of putting UV-P, namely 2-(2'-hydroxyl-5'-methoxyphenyl) benzo triazole, and catalyst active carclazyte into a reaction vessel, supplying protective nitrogen after nitrogen replacement, heating up to melt materials, dropwise adding excessive dodecylene into a system in a constant speed after the temperature is stable, keeping the temperature for reaction after accomplishing dropwise addition, finishing the reaction till a content of the UV-P in a reaction liquid is less than 0.5%, filtering off a catalyst and performing reduced pressure distillation to remove the excessive dodecylene to form the UV-517. According to the method, a raw material conversion rate is high; the conversion rate of the UV-P can reach 99.5% or higher; olefin has low possibility of self-polymerization; side reactions are few; the product yield can reach 97.0%; the method is simple to operate; the catalyst can be separated from the reaction system via simple filtration, without the steps of neutralization, water washing and the like that easily generate waste water; the method is more environmentally friendly.