UV ABSORBER YIHOO UV312
The non discoloring UV Absorber for PA, Polyesters,rigid PVC…
UV Absorption data of selected stabilizers
UV absorption spectra of Sanduvor VSU
Solvent : Cyclohexane
Cell : 1.0 cm
Concentration : 16.8 mg/l
UV Absorbers
Base requirements for an effective UV Absorber:
- High absorptivity in the sensitive UV region
- Effective dissipation of the absorbed energy in a non-photosensitizing way
(inherent light stability of the UV absorber molecule itself)
- High persistence in the stabilized polymer matrix
(minimal physical losses, good compatibility with the polymer)
- Minimal sensitivity to side reactions with / in the matrix(e.g. undesirable stabilizer consumption, discoloration, etc...)
Original color of the UV absorber solutions
(to: Interaction of UV Absorbers with metal ions)
lnteraction of UV Absorbers with metal ions
(some additives form color complexes or solid precipitates)
Dichloromethane solution: 500 ppm UV absorber in the presence of 100 ppm Ti(IV)