Why It Matters
Exterior films photo-oxidize (chalking, gloss/color loss, embrittlement); needs UV absorbers to screen UV plus radical scavengers/antioxidants to interrupt photo-oxidation
Solution Approach
Exterior films photo-oxidize (chalking, gloss/color loss, embrittlement); needs UV absorbers to screen UV plus radical scavengers/antioxidants to interrupt photo-oxidation 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 (4)
UV-328 Benzotriazole UV Absorber (Tinuvin 328 Type)
CAS 25973-55-1
Specialty Additives
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 Large Crystals; NKRA; Ot… Appearance: White to yellow powder or crystals Solubility: In water, log -1.37
Full Details
Sodium Benzotriazolyl Butylphenol Sulfonate
CAS 92484-48-5
Surfactants
UV Protection
Water-soluble benzotriazole UV absorber for waterborne systems, screening UV before it reaches the binder
Full Details
BHT (Butylated Hydroxytoluene), Food Grade
CAS 128-37-0
Specialty Additives
Antioxidant for resin stabilization
Hindered-phenol antioxidant donates H to chain-carrying peroxy radicals, interrupting thermal/photo-oxidative degradation of the resin
Melting Point: 69–71 °C Boiling Point: 265 °C at 760 mmHg Density: 1.048 at 20 °C
Full Details
Titanium Dioxide
CAS 13463-67-7
Mineral Fillers & 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
Melting Point: 1860 °C (decomposes) Boiling Point: 2500–3000 °C at 760 mmHg Density: 3.9 to 4.2
Full Details
Related Product Families
● Available
Mineral Fillers & Extenders
Calcium carbonate, titanium dioxide, and specialty minerals for opacity, filling, and cost optimization
FillingOpacityCost Reduction
3 chemistries
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● Sourcing-only
UV Stabilizers & Antioxidants
UV absorbers, HALS, and antioxidants for exterior coating durability and color retention
UV ProtectionPreservation
2 chemistries
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