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External Wall Self-Cleaner

SICCAS™W-2
External Wall Self-Cleaner
Shanghai Institute of Ceramics, Chinese Academy of Sciences

Introduction:
The SICCAS™W-2 External Self-Cleaner has been specifically designed to be an additive for self-cleaning exterior coatings. The additive is an aqueous solution containing nanocrystalline TiO2 materials, which can improve the anti-contamination and weather-proof performance of exterior coatings efficiently.
The additive can be used through spray coating process, and forms a protective layer of exterior coating. The nanocrystalline materials in the layer can decompose organic-contamination into harmless carbon dioxide and water under the sunlight irradiation. Furthermore, the nanocrystalline materials can absorb the high-energy ultraviolet light of sunlight, and then protect exterior coating layer from unfavourable photodegradations, meaning the good weather-proof performance.
Product performance 

Test reports:
Table 1. Report of anti-contamination test (Exposure after 6 months)

Item
Stain ration(%)
Test basis
Board without self-cleaner
31
GB/T9780-2005
Board with SICCASW-2
12
Upgrade ratio
61

 
Table 2. Report of Anti-aging test (1000 h)
Item
Unit
Results
Test basis
Blank board
SICCASW-2 board
Anti-aging(1000h)
/
No bubbly, No flake, No crake
No bubbly, No flake, No crake
GB/T1766-1995
GB/T1865-1997
change color
grade
2(ΔE*=4.5)
1(ΔE*=1.8)
powdering
grade
0
0

On the assessment of contamination resistance ability of exterior wall, the common used method is “Contamination Resistance Ability Test Method for Buildings’ Paint and Coating (GB 9780-2005)”
The SICCAS™ W-2 External Self-Cleaner’s Contamination Resistance test, conducted by authoritative inspection organizations, “Shanghai Institute of Quality Inspection and Technical Research” and “National Research Center of Testing Techniques for Building Materials”, shows that the contamination resistance ability improved by 61%, which indicate the product owns prominent self-cleaning effect.
Features and advantages:
Water-based environmental protection
Good ventilation, paint friendly
Inhibit bacteria and mold, keep healthy
Colorless, transparent, strong adhesion
Construction convenient, rapid prototyping
Wide variety of substrates to apply
Economical, and raise the value-added
Application Area and Cases:
External latex (water) paint, specially for elastic coating
antioxidant of External color wash in High light area
Color Weatherability cleaning of Green Ecological Building

Using Methods:
SICCAS™ W-2 can be used through spray coating process, and forms a protective layer of exterior coating. Concentrated solution of the additive can be spray coated (or brush coated) on the surface of exterior coating layer after water-diluting (volume ratio: 1:5-6). The recommended dosage is per kilogram additive using for 150-200 m2.
Performance Index:
Appearance: Sky-Blue translucency solution
Solid Content (wt%): 2.0±0.1
Mean Particle Size (nm): ≤10
Density (g/cm3): 1.02±0.01
pH value: 10.0±1.0

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