Polymethylene polyphenyl polyisocyanate
NCO content ~30%, viscosity ~200mPa·s (25℃)
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Used primarily in the production of rigid polyurethane foams, this chemical is essential in insulation for buildings, refrigerators, and cold storage units due to its excellent thermal resistance. It also serves in manufacturing adhesives, coatings, and sealants, especially in automotive and construction industries, where strong bonding and durability are required. Its high reactivity with polyols enables fast curing and robust cross-linked structures, making it suitable for composite wood products like oriented strand board (OSB) and particleboard. Additionally, it contributes to the production of elastomers used in industrial rollers, wheels, and gaskets where abrasion resistance and load-bearing capacity are critical.
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