| Classification | Meets standards | Physical and mechanical properties | Durability and aging performance | Chemical and safety indicators | Technological and Construction Performance |
| Decorative and protective topcoat resins | GB/T 23999 | Solid content: 30% – 40% | Solid content: 30% – 40% | Solid content: 30% – 40% | Solid content: 30% – 40% |
| ASTM D523, ASTM D3363 | Application viscosity: Can be adjusted for spraying, rolling, and other processes. | Application viscosity: Can be adjusted for spraying, rolling, and other processes. | Application viscosity: Can be adjusted for spraying, rolling, and other processes. | Application viscosity: Can be adjusted for spraying, rolling, and other processes. |
| Surface drying time (25°C, 50%RH): 10 – 30 minutes | Surface drying time (25°C, 50%RH): 10 – 30 minutes | Surface drying time (25°C, 50%RH): 10 – 30 minutes | Surface drying time (25°C, 50%RH): 10 – 30 minutes |
| Recoating time: 2-4 hours | Recoating time: 2-4 hours | Recoating time: 2-4 hours | Recoating time: 2-4 hours |
| Functionally enhanced coating resin | GB/T 1768 | Abrasion resistance (Taber, CS-10 wheel, 1000g): Weight loss ≤ 30 mg (abrasion resistant type), far exceeding ordinary products (40-60 mg). | Chemical resistance (abrasion resistant): Excellent resistance to acids, alkalis, salt spray, and solvent wiping properties. | VOC content: < 80 g/L | Compatibility: It has good compatibility with topcoat resins and can be used to construct a “functional primer + decorative topcoat” system. |
| GB/T 9286 | Adhesion (cross-cut test): Grade 0 (high adhesion type, suitable for difficult-to-adhere substrates such as stainless steel, aluminum alloy, PP, and ABS) | Salt spray resistance (high adhesion type): When used as a primer, the system can pass a neutral salt spray test of >500 hours. | Environmental certifications: Compliant with international environmental directives such as RoHS and REACH. | Application recommendations: The abrasion-resistant type is recommended for high-traffic areas such as floors and countertops; the high-adhesion type is recommended for metal and plastic primers. |
| Pencil hardness: 2H – 3H (abrasion resistant), H – 2H (high adhesion) | Resistance to damp heat aging (high adhesion type): >500 hours, adhesion remains at grade 0-1. | Technical characteristics: High adhesion type usually contains special functional groups that can form chemical bonds with the substrate. | |
| General-purpose economical coating resin | GB/T 23999 | Gloss level (60°): Available in the range of 20-80 GU (mostly semi-gloss). | Artificial aging resistance (QUV-B): 200 hours, chalking ≤1, discoloration ≤2. | VOC content: < 50 g/L (far below the national standard limit) | Application tolerance: High, adaptable to various application methods such as spraying, rolling, and brushing. |
| Pencil hardness: F – H | Alkali resistance (5% NaOH, 24h): No bubbling, no peeling. | Safety: Free of formaldehyde and benzene compounds, making it an environmentally friendly product. | Drying speed: Surface dry <30 minutes, fully dry <6 hours (25°C) |
| Adhesion (cross-cut test): ≤ Level 1 (for treated wood, walls, and common metals) | Stain resistance: Easy to clean; common stains can be wiped off. | | Recoatability: Excellent, good interlayer adhesion, and less prone to problems such as bottoming out. |
| Impact resistance: 50 kg·cm, no peeling or cracking of the coating during both forward and reverse impacts. | | | |
