T/CWA 209-2022 Non-solvent polyurethane waterproof coating

Scope

Scope: This document specifies the classification and marking, requirements, test methods, inspection rules, and marking, packaging, transportation, and storage of solvent-free polyurethane waterproof coatings for non-exposed applications in waterproofing projects. Main technical content: 1. Products are classified by components: single-component (S) and two-component (M). 2. Products are classified by application areas: flat surfaces (H) and vertical surfaces (V). 3. The physical and mechanical properties of the products shall comply with the following requirements: - Solid content (%): ≥99.0 - Drying time (h): ≤12 - Curing time (h): ≤24 - Leveling property (H class): No obvious tooth marks within 20 minutes - Anti-sagging property (V class): No sagging when the wet film thickness reaches 600 μm - Tear strength (N/mm): ≥15 - Low-temperature bending property / °C: -35 °C, no cracks - Thermal expansion rate / %: -2.0 to +1.0 4. The limits of harmful substances in the products shall comply with the following requirements: - Volatile organic compounds (VOC) content (g/L): ≤20 - Benzene (mg/kg): ≤20 - Toluene + ethylbenzene + xylene (g/kg): ≤1.0 - Phenol (mg/kg): ≤100 - Anthracene (mg/kg): ≤10 - Naphthalene (mg/kg): ≤200 - Free TDI (g/kg): ≤0.14 - 4’-diamino-3,3’-dichlorodiphenylmethane (MOCA) (g/kg): ≤0.1 - Short-chain chlorinated paraffins (C10–C13) content (g/kg): ≤10

Development Information

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