T/CWA 207-2021 Water-based polyurethane waterproof coating

Scope

Scope: This document specifies the classification and marking, requirements, test methods, inspection rules, labeling, packaging, transportation, and storage of waterborne polyurethane waterproof coatings. This document applies to single-component waterborne polyurethane waterproof coatings used in waterproofing projects in non-long-term immersion environments. Main technical contents: 1. Products are divided into exposed type (E) and non-exposed type (N) according to whether they are exposed during use. 2. The products are uniform and viscous, without gelation, layering, or clumping. 3. The physical and mechanical properties of the products shall comply with the requirements specified in the following table: **Item** **Technical Indicators** Low-temperature tensile elongation /% at -10°C ≥450 Tear strength / (N/mm) ≥15 Low-temperature flexural property / °C -35°C, no cracks Burning performance a B2-E 4. The content of harmful substances in the products shall comply with the requirements specified in the following table: **Item** **Technical Indicators** Volatile organic compound (VOC) content / (g/L) ≤30 Benzene + toluene + ethylbenzene + xylene / (mg/kg) ≤20 Formaldehyde content / (mg/kg) ≤50 Ammonia / (mg/kg) ≤300 Soluble heavy metals / (mg/kg) Lead Pb ≤20 Cadmium Cd ≤20 Chromium Cr ≤20 Mercury Hg ≤20

Development Information

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