LeSORB® UV-531

Technical Data Sheet

LeSORB® UV–531

Introduction

LeSORB® UV-531 is an ultraviolet light absorber (UVA) of the benzophenone class, imparting good light stability for plastics and other organic polymers. Due to its highly effective broad UV absorption properties and excellent polymer compatibility, LeSORB® UV-531 offers maximum polymer protection and low color contribution, retards yellowing and loss of physical properties.

Chemical name: 2-Hydroxy-4-n-octoxybenzophenone

CAS NO: 1843-05-6

Empirical Formula: C21H26O3

Molecular Weight: 326

Structure :

LeSORB® UV-531 CHEMICAL STRUCTURE

Physical Properties :

ItemsProperties
AppearancePale yellow crystalline powder
Melting Range47-49 °C
Assay≥99%
Volatile Matter≤0.5%
Relative Density1.16g/cm3

Solubility At 20 ℃ (g/100ml solvent) :

SolventSolubility
Acetone43%
Benzene72%
Chloroform61%
Ethanol3.5%
Ethyl Acetate44%
n-Hexane12%
Methanol1.7%
MEK65%
Methylene Chloride67%
Toluene>50%
Water<0.01%

UV Absorption :

Absorption Spectrum (10mg/l, Chloroform)

Performance & Usage :

Ultraviolet light absorber LeSORB® UV-531 is an efficient absorber with excellent performance. It has features such as light color, non-toxic, good compatibility, small mobility, and etc. It is widely used in PE, PVC, PP, PS, PC, PMMA, polypropylene fiber, vinyl acetate and other fields. Moreover, it can provide dry phenolic and alkyd varnishes, polyurethane, acrylic, epoxy and other drying products, powder coating,polyurethane, rubber products with favorable light stability.
Additive amount is 0.1-0.5%.

Dosage :
  • Polypropylene : 0.5wt% based on polymer weight
  • PVC:
    • Rigid PVC : 0.5wt% based on polymer weight
    • Plasticized PVC : 0.5-2 wt% based on polymer weight
  • Polyethylene : 0.2-0.4wt% based on polymer weight
  • ABS: 0.3-0.5wt% based on polymer weight
Toxicity & Safety :

LeSORB® UV-531 is not intended for use in products for which prolonged contact with mucous membranes or abraded skin, or implantation within the human body is specially intended, unless the finished product has been tested in accordance with the Food and Drug Administration and/or other applicable safety testing requirements.

Storage :

LeSORB® UV-531 may be stored up to two years in a sealed container. Containers should be stored in a cool, dry area. Extended storage at elevated temperatures or exposure to direct heat or sunlight could reduce product life. Keep containers sealed when not use.

Handling :

In accordance with good industrial practice, handle with care and avoid unnecessary personal contact. Protect skin. Prevent contamination of the environment. Avoid dust formation and ignition sources.

Packing :

Carton is lined with a plastic bag packaging: 20 or 25kg/ box. Also can be designed according to customer requirements.