Environmentally friendly polyurethane sealant is a low VOC, solvent-free, low toxicity/non-toxic polyurethane sealing material that balances sealing performance and green environmental protection. It is the mainstream environmentally friendly sealing solution in fields such as construction, transportation, and new energy.
1、 Core environmental indicators (current standards)
VOC content: JC/T 482-2022 ≤ 650g/L; High end solvent-free type can reach ≤ 50g/L
Free formaldehyde: ≤ 0.1g/kg
Total benzene derivatives: ≤ 50g/kg
Compliance certification: Compliant with GB 18583, EU REACH, RoHS, LEED green building certification
2、 Environmental Protection Technology Route
Solvent free/low VOC formula
Moisture curing, without adding organic solvents, controlling VOCs from the source
Almost no irritating odor during construction, improving the working environment
Substitution of bio based raw materials
Replacing some petroleum based raw materials with plant-based polyols such as castor oil and soybean oil
Reduce fossil dependence and enhance biodegradability/recyclability
Recyclable recycling technology
Waste rubber can be recycled into polyether polyols through cracking, with a recovery rate of ≥ 85%
Reduce solid waste, in line with circular economy
3、 Core Performance (Balancing Environmental Protection and High Performance)
Elasticity and adhesion: high elongation (≥ 300%), strong adhesion to concrete, metal, glass, and stone
Weather and temperature resistance: -40 ℃~90 ℃ stable, no flow at high temperatures, no brittle cracking at low temperatures, aging resistance of 1000h
Construction friendly: single component (moisture curing)/two-component (mixing ratio), good thixotropy, easy to apply
4、 Typical application scenarios
Architecture: Indoor external expansion joints, curtain walls, doors and windows, kitchen and bathroom waterproofing (priority given to hospitals/schools)
Transportation: Highway/bridge expansion joints, car windshields, rail transit seals
New energy: photovoltaic modules, energy storage batteries, charging pile sealing
Municipal: Water conservancy, tunnel, underground pipe gallery jointing
5、 Key points for selection and construction
Check certification: Priority should be given to those with VOC testing reports REACH/RoHS、 Green building materials certified products
Classification: Single component suitable for small area/rapid construction; Two component suitable for large-area/high-strength sealing
Construction: Clean and dry base surface; Strictly mix the two components in proportion; Avoid low temperature and high humidity construction
