Why It Matters
Waterborne coatings need in-can preservation (bacteria/yeast/mold in wet state) and dry-film fungicide/algaecide protection on the cured film
Solution Approach
Waterborne coatings need in-can preservation (bacteria/yeast/mold in wet state) and dry-film fungicide/algaecide protection on the cured film 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)
Isothiazolinone(CMIT/MIT)
CAS 26172-55-4
Specialty Additives
Preservation
Broad-spectrum in-can preservative — the isothiazolinone reacts with microbial thiol enzymes, halting metabolism in the wet paint
Melting Point: 54-55 °C Density: For a mixture of 5-chloro-2-methyl-3(2H)-isothi… Solubility: Solubility in g/100 mL solvent: water, infinite
Full Details
BIT (benzisothiazolinone)
CAS 2634-33-5
Specialty Additives
Biocidal Action
Formaldehyde-free in-can bactericide with good high-pH stability for long wet-state shelf protection
Melting Point: 156.6 °C Boiling Point: 327.6 °C Density: 1.483 g/cu cm at 20 °C
Full Details
2-Octyl-2H-isothiazol-3-one (OIT)
CAS 26530-20-1
Specialty Additives
Biocidal Action
2922 (2-OCTYL-3-ISOTHIAZOLONE) · Class Hydrophobic, leach-resistant isothiazolinone used as a dry-film fungicide in the cured coating
Physical Description: 2-octyl-3-isothiazolone is a clear dark amber l… Appearance: Light, golden yellow, clear liquid Odor: Very weak, sharp smell
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Zinc Oxide
CAS 1314-13-2
Mineral Fillers & Pigments
Active pigment — mildew resistance and UV blocking
3077 (ZINC OXIDE, CRUDE) · Class Mildewstat that supplements organic dry-film biocides and adds UV/mildew resistance to exterior films
Melting Point: 1975 °C Density: 5.61 Solubility: 0.0004 % at 18 °C
Full Details