Application Solutions Water-based polyurethane (polyurethane water dispersion) coating uses water as the main medium, has low VOC content, does not contain free diisocyanate monomers, reduces volatile toxicity, is environmentally friendly, can be diluted with water, and is easy to construct.
The application fields of water-based polyurethane coatings include: floor paint, wood furniture paint, surface coating of plastic parts of automobiles, motorcycles, aircraft and commercial equipment, automotive OEM paint, anti-stone coating, peelable coating, coil steel primer, anti-corrosion coating, PVC flooring Topcoat, coating for leather, fabric, paper, rubber and other soft materials, electrophoretic paint, light-curing coating, interior and exterior wall coating, etc.
1.Oligomer polyol
Polyether and polyester diols, polyether triols, low-branched polyester polyols, polycarbonate diols and polycaprolactones. Ester diols, polyolefin polyols and other oligomer polyols.
2.Isocyanate
TDI, MDI, isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), methylene dicyclohexyl-4,4'-diisocyanate (H12MDI), polymethylene polyphenyl poly Isocyanate (PAPI)
3.Chain extender
2,2-Dimethylolpropionic acid (also known as dimethylolpropionic acid), referred to as DMPA or DHPA,
Sodium ethylenediamine ethanesulfonate, sodium 1,4-butanediol-2-sulfonate, N-methyldiethanolamine.
4.Salt-forming agent
Sodium hydroxide, ammonia and triethylamine, HCl, CH3COOH, and alkylating agents such as CH3I, (CH3)2SO4, epichlorohydrin, etc.
5. Water and organic solvents
Water, acetone, methyl ethyl ketone, dioxane, N,N-dimethylethylamine, formamide, N-methylpyrrolidone and toluene.
6. Emulsifier
Such as ethylene oxide-propylene oxide copolymer, bisphenol A-epichlorohydrin-polyethylene glycol adduct, etc.
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Types of isocyanate raw materials