In development Ultraviolet (UV) Absorber: IX-2-EX-U Series

  • Main Applications

    Various devices, Optical materials, In-vehicle materials, Cosmetics, Compacts such as film sheets, Packaging containers, Paints and coatings, Adhesives, Building materials, etc.

  • Applications
  • Functions

Basic Information

1.High heat resistance, with superior dispersibility in resins

  • Heat-resistant of at least 300°C as a UVA simple substance, with excellent heat resistance even in resins
  • Superior dispersibility in various resins, and also able to disperse at high concentrations

2. Sharp absorption properties

  • Sharp maximum absorption in UVA wave range (320 – 400 nm)
  • Able to control maximum absorption wavelengths as required/preferred

3.Our lineup also includes product grades that are highly soluble in water and various organic solvents.

Details of Functions

Film Formation Evaluation

These products are able to disperse at high concentrations in various resins.
They are also highly durable even under high temperature conditions.

(Evaluation Conditions)　
Concentration in resins: 10 wt%, Film thickness: 2 μm, Curing at 190°C for one hour (nitrogen atmosphere)
The UVA residual ratio is calculated from the attenuation in absorption before and after curing in UVA maximum absorption wavelengths.

Items for ConsiderationUVA Residual Ratio (%)
PMMAPolystyreneCyclo-olefin Polymers (COP)Polyarylate
NS-UVA
(Developed by Nippon Shokubai)		95909388
Commercial UVA
(Benzotriazole-based)		00013
Commercial UVA
(Benzoate-based)		0004
Commercial UVA
(Benzophenone-based)		0000

Absorption Properties

  • Sharp maximum absorption in UVA wave range (320 – 400 nm)
  • Able to control maximum absorption wavelengths as required/preferred

The following absorption properties are examples.Please inquire about maximum absorption wavelengths.

Graph of Transmission spectra(chloroform)

List of Properties

Products in DevelopmentMaximum Absorption Wavelength (nm)*Heat Resistance (°C)**Gram Absorption Coefficient (L/g·cm)*
NS-UVA132631577
NS-UVA2372308103
NS-UVA340530984
*: Measured value in chloroform solvent
**: 5% weight reduction temperature (in the air, temperature increase rate of 10°C/min)
The data listed above are examples.

Water-soluble Grade (New)

Product in DevelopmentMaximum Absorption Wavelength (nm)+Heat Resistance (°C)++Gram Absorption Coefficient(L/g·cm)+Solubility
(Ion-exchange water)
NS-UVA④344.023070>10wt%
+: Measured value in ion-exchange water
++: 5% weight reduction temperature (in the air, temperature increase rate of 10°C/min)

NS-UVA4 Film Formation Spectrum

Graph of NS-UVA4 Film Formation Spectrum
Film Formation Conditions Concentration in resins (polyvinylpyrrolidone (PVP)): 11 wt%, Film thickness: 2 μm, Curing at 150°C for one hour (in the atmosphere)