Product Description
Descriptions STWD900 SPUA potable water anticorrosion waterproof coating is a polymer reacted by Isocyanate (party A) and Amino compound (party B). The technical formulation is imported from STWD Urethane Company, the raw materials and production process adopted are harmless and toxic free, it meets the requirements of Standard Specification for Potable Water Products and gained License Number of Health permit of Ministry of chemical industry. The operative norm is (Jiangsu) sanitary water (2016) number 3200-0005. Following the high-solids coatings, waterborne coatings, radiation curable coatings, powder coatings and other low (no) pollution coating technologies, Spray Polyurea Elastomer (short as SPUA) technology is a new solvent-free, pollution-free green application technology which is developed to meet environmental requirements in nearly two decades abroad. It has been used in drinking water pipelines, storage tanks and water tanks that meet the food standards, with its outstanding waterproof, anticorrosion and protective capabilities, as well as environmental protection, pollution-free sanitary performance.
Characteristics The product has high reactivity, complete chemical reaction, no harmful substances in the cured film, also with no chemical precipitation in actual use. Rapid cure, can be sprayed forming on any bent, slope and vertical surfaces without sagging. Dense and seamless coating, completely isolated from air, water, and other media infiltration or penetration. It has excellent adhesive strength and impact resistance, combines good anticorrosion waterproof, abrasion resistance, anti-aging and safe environment protection performance. The hardness is adjustable to meet high elasticity and high ductility or high hardness and high strength support requirements.
Characteristics
Adhesive strength (concrete base) ≥2.9 Mpa( or substrate broken)
Adhesive strength (steel base) 11.3 Mpa
Tear strength 80.6kN/m
Tensile strength 17.8Mpa
Elongation 472%
Hardness Shore A ~ Shore D
Penetrate resistance 2.3Mpa
Temperature variation -40------+120ºC
Wear resistance (750g/500r) 5mg
Acid resistance (10%H2SO4 or 10%HCI, 30d) no rust no bubbles no peel
Alkali resistance 10%NaOH, 30d no rust no bubbles no peel
Salt resistance 60g/L, 30d no rust no bubbles no peel
Salt spray resistance 1000h no rust no bubbles no peel
Hygienic performance conforms to the regulation for the evaluation of protective materials for drinking water, issued by Sanitary license approval [2001]161
Data of performance
Color White
Luster glazed
Density 1.01g/cm3
Volume solid content 99% ±1%
VOC 0
Recommended dry film thickness 1000-3000μm
Theoretical coverage 2.04kg/sqm (calculated by the above solids percentage and dry film thickness of 2000 microns)
Practical coverage Allow appropriate loss rate
Dry time 5-20s solid dry time: 20 min
Overcoating interval min: 1h, max: 24h
Overcoating method Special polyurea equipment spray (imported or local support)
Flash point 200ºC
Recommended procedures (or as design requirements)
| No. |
Name of products |
Layers |
Dry film thickness(μm) |
| 1 |
STWD polyurea special primer |
1 |
50 |
| 2 |
STWD900 SPUA drinking water anticorrosion waterproof coating material |
1 |
2000 |
| Total |
|
2 |
2050 |
Application scopes Water pipes, water purification pipelines, water tanks, water pools, water storage tanks and other areas of drinking water sanitation standards of anti-corrosion waterproof projects
Shelf life 8 months (Indoor with dry and cool conditions)
Packing Component A: 220kg/bucket, component B: 200kg/bucket
Production places Minhang Shanghai City, and Nantong coastal industrial park production base in Jiangsu (15% of the raw materials imported from STWD US, 30% from multinational company in Shanghai, 55% from local support)
Security To apply this product must be accordance with the relevant national regulation of sanitation, safety and environment protection. Do not even contact the surface of wet coating.
Global applicability Our company aims to provide worldwide customers with standard coating products, however custom adjustments can be made to adapt and leverage different regional conditions and international norms. In this case, additional alternative product data will be provided.
Integrity declaration Our company guarantees the reality of the listed data. Due to the diversity and variability of the application environment, please test and verify it before use. We don't take any other responsibilities except the coating quality self and reserve the right of modifying the listed data without prior notice.
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