Overview
Polyurethane black and white components are the two-part system used to produce polyurethane polymers. The white component typically contains polyols, catalysts, and additives, while the black component consists of isocyanates (commonly MDI or TDI). When mixed in precise ratios, they undergo exothermic polymerization to form versatile PU materials with applications ranging from rigid foams to elastomers. The industry standard mixing ratio is commonly 1:1 by volume, though formulations vary significantly based on the desired end product properties. These materials are fundamental in construction, automotive, and appliance manufacturing due to their excellent insulation properties, durability, and adhesion characteristics.
Physical and Chemical Properties
The black component (isocyanate) is typically a dark, viscous liquid with a strong odor, featuring high reactivity with compounds containing active hydrogen atoms. It has a density of approximately 1.22 g/cm³ and should be handled with care due to its moisture sensitivity. The white component (polyol blend) appears as a light-colored liquid or paste, with density around 1.05-1.15 g/cm³, containing hydroxyl groups that react with isocyanates. Key reaction parameters include pot life (typically 5-30 minutes at room temperature), cream time (15-90 seconds), and full cure time (4-24 hours). The resulting polyurethane exhibits excellent thermal stability (-40°C to +120°C service range), low thermal conductivity (0.019-0.035 W/m·K for foams), and good chemical resistance to oils and solvents.
Main Applications
In construction, these components are primarily used for spray foam insulation, producing rigid panels with R-values up to 6.5 per inch. The automotive industry utilizes them for seat cushions, interior trim, and sound dampening materials. Industrial applications include conveyor belt coatings, pipe insulation, and industrial adhesives with exceptional bonding strength to metals, plastics, and wood. The consumer goods sector employs these materials for furniture foams, shoe soles, and sports equipment. Recent developments include eco-friendly formulations with bio-based polyols and low-VOC options for indoor applications. Specialized grades are available for high-temperature resistance (up to 180°C) or flame retardant requirements (meeting UL94 V-0 standards).
Safety and Storage
Isocyanate components require strict handling precautions due to potential respiratory sensitization. Engineering controls should include local exhaust ventilation and closed systems where possible. Personal protective equipment must include chemical goggles, nitrile gloves (minimum 0.11mm thickness), and respiratory protection (organic vapor cartridge respirators for occasional exposure; supplied air for prolonged use). Storage conditions require maintaining temperatures between 15-25°C in original sealed containers. Moisture contamination must be prevented as it causes premature reaction and gas formation. Shelf life is typically 6-12 months when stored properly. Spills should be contained with absorbent materials like vermiculite, never washed with water due to violent reaction potential.
B2B Procurement Guide
Industrial buyers should specify key parameters: hydroxyl number (for polyols, typically 200-600 mg KOH/g), isocyanate content (usually 30-33% NCO for MDI), viscosity (commonly 200-2000 mPa·s at 25°C), and functionality (2-3 for flexible foams, 3-8 for rigid foams). Batch consistency is critical - request certificates of analysis for each shipment. For large-volume procurement (10+ metric tons), consider manufacturer direct purchasing with bulk tanker delivery. Medium-volume users (1-10MT) may opt for 200kg drums, while small users can source pre-packaged kits. Quality indicators include German TÜV or UL certifications. Emerging markets are seeing increased availability of halogen-free flame retardant systems for electronic applications.
Related Manufacturers
- 主营：[]
- 主营：蛋白胨、牛骨蛋白胨、福美钠、聚氨酯发泡剂小量可发、强氯精、单乙醇胺、三乙醇胺、氯化铜、水玻璃、防辐射硫酸钡
- 主营：优氯净、甘氨酸、切削液、聚氨酯发泡剂、水杨酸、硫酸锰、平平加、滑石粉、牛磺酸、白僵菌、磷酸铁、铵明矾、蛋白胨、碳酸镁、磷酸铝、戊二醛、纤维素、硫化钠、硫化钡、黄蜂蜡、硫化钙、氯化锌、氯化锰、氧化锑、氧化锆、氧化锌
- 主营：锚固剂、硫酸铝、硫酸铜、聚氨酯发泡剂批发价格、切削液、氧化铜、溴化钠、大苏打、导热油、腐植酸、净洗剂、活性炭、水杨酸、硫酸锰、漂白粉、玻璃粉、茶皂素、丁酸钠、磷酸钙、甲酸钠、硬脂酸、消泡剂、酵母硒、磷酸铁、铵明矾、硫酸钡
- 主营：氯化锌、玻璃粉、冰醋酸、聚氨酯发泡剂现货、茶皂素、甘氨酸、渗透剂、棕榈酸、氯化钾、靛蓝粉、磷酸钙、eva乳液、氟化钾、堵漏王、早强剂、三甘醇、亚油酸、木质素、氟化钠、铵明矾、pvc树脂、富马酸、白糊精、壳聚糖、苯丙乳液、三乙二醇
- 主营：阻燃剂、封口蜡、热熔胶、聚氨酯发泡剂现货发送、钒酸铋、磷酸铁、碳酸镁、磷酸铝、石炭酸、椰油胺、碳酸铅、乙酸钡、浮选剂、去除剂、乙硫氮、abs树脂、脂肪酶、除磷剂、皂角苷、润肤剂、甲酸钙、二乙胺、松香胺、大豆油、碳酸锰、引气剂
- 主营：岩棉复合板、石墨聚苯板、聚合聚苯板、聚氨酯保温板、聚氨酯复合板、保温结构一体板、免拆模一体板、保温装饰一体板、真空绝热板、岩棉免拆一体板、聚苯板
- 主营：回收染料、回收颜料、回收油漆、聚氨酯树脂、回收油墨、回收丙烯酸、回收丙烯酸丁酯、回收丙烯酸甲酯、回收丙烯酸乙酯、回收丙烯酸羟乙酯、回收三乙胺、回收一乙醇胺、回收二乙醇胺、回收三乙醇胺、回收油酸、回收二甲基甲酰胺、回收二甲基吡咯烷酮、丙酸、甲酸、四氯乙烯、正庚烷、亚磷酸、松节油
- 主营：真空绝热板、酚醛保温板、真空板、聚氨酯保温板、聚氨酯板、硬泡聚氨酯板、酚醛板、保温装饰一体板
- 主营：聚氨酯保温管、聚氨酯发泡保温管、直埋式预制保温管、预制直埋保温管
- 主营：窑密封、化工窑、复合板、聚氨酯、密封板、鱼鳞片、密封件、回转窑、裂解窑炉、密封气体、不漏气窑头、工业窑炉密封、窑炉气体密封
- 主营：预制直埋保温管、热力保温管道、预制保温管、聚氨酯保温管、聚氨酯发泡保温管、聚氨酯直埋保温管、预制聚氨酯保温管、聚氨酯管道保温、预制直埋式聚氨酯保温、聚氨酯预制保温管、聚氨酯保温板、聚氨酯发泡保温板、聚氨酯复合保温板、高密度聚氨酯保温板、阻燃聚氨酯保温板、聚氨酯防火保温板、聚氨酯直埋预制保温管、聚氨酯保温材料、预制直埋式保温管、钢套钢保温管、钢套钢蒸汽保温管、耐高温保温管、钢套钢直埋蒸汽保温管、聚乙烯保温管、复合保温板
- 主营：氟碳漆、防腐胶泥、氟碳面漆、聚氨酯防腐漆、防水涂料、丙烯酸面漆、环氧富锌漆、环氧煤沥青漆、环氧树脂涂料、丙烯酸树脂漆、玻璃鳞片胶泥、特种氰凝涂料、环氧富锌底漆、玻璃鳞片涂料、氟碳金属防腐漆、环氧富锌防锈漆、8710饮用水涂料、环氧乙烯基树脂、环氧沥青漆、聚脲防水涂料、水泥基渗透结晶、三布五油防腐施工、环氧云铁中间漆
- 主营：PC、耐高温材料、ABS、聚氨酯、防火ABS、防火阻燃PC、PC防火阻燃V0抗UV、PA66、POM、PBT、PP、PC/ABS、TPU、PBT 加纤防火、PA66 加纤防火、PA66 加纤
- 主营：玻璃鳞片胶泥、双组份聚脲喷涂、环氧玻璃鳞片胶泥、聚氨酯保温喷涂、b1级聚氨酯喷涂、高温玻璃鳞片胶泥、轻集料混凝土A型
- 主营：稀释剂、清洗剂、洗网水、聚氨酯、开油水
- 主营：聚氨酯
- 主营：缓冲垫、清扫器、轴承座、聚氨酯、防滑板、尼龙轮、密封条、旋流器、上托辊、过浆管、输送机、黄色pu棒、橡胶软管、叶轮盖板、泥沙分离、橡胶缓冲、调心托辊、森钐橡塑、橡胶地辊、水泵叶轮、橡塑耐磨、直径套筒、配件尼龙、脱水筛网、过渡托辊
- 主营：POM、ABS、PC、聚氨酯、PP、德国巴斯夫、日本宝理、韩国SK、PA66
- 主营：化学品、香精香料、试剂、环氧聚氨酯丙烯酸酯、中间体、有机硅、橡胶树脂、催化剂、纳米材料
- 主营：冷库板、净化板、机制净化板、聚氨酯封边岩棉夹芯板、聚氨酯保温板、聚氨酯墙面板、聚氨酯屋面板、手工净化板、岩棉复合板、长城板、光伏屋面板、彩钢瓦、檩条、外墙装饰保温一体板、PU夹芯板、岩棉保温板、铝合金长城板、楼承板、岩棉防火板、彩钢夹芯板、蘑菇养殖仓、防火保温板、洁净板、金属幕墙板