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 is a liquid benzotriazole UV absorber. Imparts good light stability to a variety of polymers. Features high compatibility in various substrates, low volatility even at elevated temperatures, and high absorption and protection efficiency. Highly soluble in many solvents, monomers, or intermediates and easily emulsifiable in water-based adhesives.

Uses

UV 571 has good thermal stability and compatibility with various polymers. It is widely used in thermoplastic PUR, paints and foams, also used for PPVC, PVB, PMMA, PVDC, EVOH, EVA, thermosetting unsaturated resins, PA, PET, PUR webs and PP fiber.Tinuvin 571 is also suitable for latex, waxes, adhesives, homogeneous polystyrene and its copolymers, elastomers, and polyolefins.

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.