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| Customization: | Available |
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| CAS No.: | CAS 26680-22-8 |
| Formula: | C3h8n2o |
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Polyurethane Resin (PU Resin) is a versatile thermosetting polymer synthesized by reacting isocyanates (-NCO compounds) with polyols (multi-hydroxyl molecules). Featuring alternating soft (polyol) and hard (isocyanate-derived) segments, it blends isocyanates' rigidity/chemical resistance with polyols' flexibility/elasticity to balance strength and pliability. Key strengths: abrasion/corrosion resistance, thermal stability, strong substrate adhesion, and lightweight closed-cell foam (thermal/acoustic insulation). Widely used in daily goods, auto/construction/aerospace/medical fields, it's a cost-effective, multi-functional material for innovative manufacturing.
| Property | Description |
| Polymer type | Thermosetting |
| Tensile strength | 60-90 MPa |
| Hardness | 80-90 Shore D |
| Viscosity | 300-5000 cP |
| Water resistance | Excellent |
Mechanical Strength: Polyurethane resins exhibit excellent mechanical properties. For example, adding polyester enhances the impact strength significantly compared to pure Polyurethane, which can increase impact strength by over 250% and fracture strength by 127% when modified appropriately (Luo et al., 2011).
Thermal Stability: The thermal stability of Polyurethane blends is enhanced by polyester. For instance, blends with polyester show improved thermal conductivity, specific heat capacity, and a slight reduction in glass transition temperature. The decomposition temperature of these resins can improve by about 20°C with the proper addition of polyester (Ali et al., 2021).
Processing Ease: One of the significant advantages of Polyurethane resins is their ability to be processed easily at ambient temperature with a low viscosity and easy molding properties, making them suitable for diverse applications in coating and composite materials.
Environmental Resistance: These resins show excellent resistance to water, chemical corrosion, and UV degradation, making them ideal for use in harsh environments. The blend of polyester in Polyurethane helps improve chemical resistance, a feature critical for applications like automotive and construction materials (Torrón et al., 2016).
Adhesion: Polyurethane resins provide superior adhesion to various substrates, including metals, plastics, and glass, while polyester increases the resin's ability to adhere to fibrous materials (Oliveira et al., 2019).
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