UV ABSORBER YIHOO UV312

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)

Light stabilization of PA-6 by UV Absorbers

lnitial color 

Additives: 0.5% UVA

lnjection molded plaques (1 mm thick) from PA-6 semi dull

Light stabilization of PA-6 by UV Absorbers

lnitial color

Additives: 0.005%Cu2+ + 0.5% UVA

Injection molded plaques (1 mm thick) from PA-6 semi dull

Light Stabilisation of PA-12 

Accelerated Weathering - 1500 hours in WOM(DIN 53 387 A)

PA-12 Injection moulded plaques, 1 mm thick

BS : 0.05% Hostanox 0 10+0.5% uV absorber

Light Stabilisation of Polyesters 

Accelerated Weathering - 600 hours in WOM (DIN 53 387 A)

Original Yl= 10

PBT Compression moulded plaques, 0.5 mm thick

BS : 0.1% Hostanox o 10+ 0.5% UV absorber

Light Stabilisation of pigmented rigid PVC 

Accelerated Weathering - 600 hours in QUV-A(ASTM D 5208-91)

Orange-pigmented rigid PvC pressed plaques, 2 mm thick

Ls content : 0.5%