Industrial — Process Challenge

Absorbeurs UV et photostabilisants (HALS) pour revêtements

Les films extérieurs subissent une photo-oxydation (farinage, perte de brillance/couleur, fragilisation) ; nécessite des absorbeurs UV pour filtrer les UV ainsi que des piègeurs de radicaux/antioxydants pour interrompre la photo-oxydation
Updated Jun 2026
Approche de solution

RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.

Typical Formulation Workflow
1
System & Substrate Assessment
Define the binder system (waterborne, solventborne, UV, powder), substrate, cure, and the VOC, durability, and appearance targets.
2
Additive & Resin Selection
Match resins, pigments and fillers, dispersants, rheology modifiers, defoamers, or biocides to the formulation and compatibility window.
3
Lab Let-Down & Optimization
Dial in loading and addition order through lab let-downs, checking dispersion, rheology, film properties, and storage stability.
4
Application & Performance Testing
Validate on the real application method and substrate, tracking gloss, adhesion, sag, cure, and weathering before scale-up.
Recommended Chemistries (5)
UV-328 Benzotriazole UV Absorber (Tinuvin 328 Type)
CAS 25973-55-1
Additifs de Spécialité
Organic UV absorber for clear coatings
Hydroxyphenyl-benzotriazole UVA absorbs 300-380 nm light and dissipates it as heat, protecting resin and substrate from photolysis
Physical Description: Dry powder, pellets or crystals, or solid   Appearance: White to yellow powder or crystals   Solubility: In water, log -1.37
Aperçu rapide
Détails complets
Sodium Benzotriazolyl Butylphenol Sulfonate
CAS 92484-48-5
Tensioactifs
Protection UV
Water-soluble benzotriazole UV absorber for waterborne systems, screening UV before it reaches the binder
Aperçu rapide
Détails complets
BHT (Butylated Hydroxytoluene), Food Grade
CAS 128-37-0
Additifs de Spécialité
Antioxydant pour la stabilisation des résines
Hindered-phenol antioxidant donates H to chain-carrying peroxy radicals, interrupting thermal/photo-oxidative degradation of the resin
Point de fusion:69–71 °C   Point d'ébullition:265 °C at 760 mmHg   Densité:1.048 at 20 °C
Aperçu rapide
Détails complets
Titanium Dioxide
CAS 13463-67-7
Charges Minérales et Pigments
Primary white pigment for opacity
Rutile (surface-treated) titanium dioxide reflects and absorbs UV, physically shielding the binder beneath; note uncoated/anatase grades are photocatalytic and promote chalking, so only coated rutile grades protect
Point de fusion:1860 °C (decomposes)   Point d'ébullition:2500–3000 °C at 760 mmHg   Densité:3.9 to 4.2
Aperçu rapide
Détails complets
Zinc Oxide
CAS 1314-13-2
Charges Minérales et Pigments
Active pigment — mildew resistance and UV blocking
3077 (ZINC OXIDE, CRUDE) · Class
Genuine inorganic UV absorber/screen used in exterior and clear coatings to block UV-A/UV-B, protecting the binder from photo-oxidation and curbing chalking. Micronized/nano ZnO is used specifically in transparent wood coatings and clear topcoats where pigmentary TiO2's opacity is undesirable, so it is a true complement to the listed TiO2 for this exact UV-weathering/degradation use-case, not just
Point de fusion:1975 °C   Densité:5.61   Solubility: 0.0004 % at 18 °C
Aperçu rapide
Détails complets

Besoin d'aide pour sélectionner le bon produit chimique ?

Notre équipe peut vous aider pour la sélection des grades, le conseil en dosage et l'approvisionnement multi-origines.

Demander un Devis All Coatings & Construction Problems
Demander un Devis

Catalogue en français →