As early as the 1960s, dimethylethanolamine (DMEA) has been used as an inexpensive catalyst in the polyurethane foam industry. It can be used alone or in combination with other amine catalysts for polyurethane soft block foam, molded foam and rigid foam.
Dimethylethanolamine (DMEA) is also a raw material for preparing other high-performance amine catalysts (such as Niax A-1). Using dimethylethanolamine (DMEA) as a catalyst for polyurethane rigid foam, the milky white period of the foam obtained is 15s, rise time 146s, using dimethylethanolamine (DMEA) as a catalyst for polyurethane semi-rigid foam, the resulting molded foam has a density of 114kg/m3, has improved damping properties, and is used as a shock absorber for vehicles. Polyurethane with good coating performance can be prepared by reacting low molecular weight polyether polyol, chain extender and aromatic isocyanate in the presence of dispersing agent dimethylethanolamine (DMEA) and dibutyltin dilaurate Reaction injection molding products use dimethylethanolamine (DMEA) as a catalyst for polyurethane rigid foam for refrigerator insulation. Mix 100 parts of hydroxypropyl aromatic diamine, 1.5 parts of F-338 (surfactant), 25 parts of R-Il, 2.0 parts of DMEA, 0.5 parts of calcium stearate and 130 parts of polyisocyanate, 21mW/(m.k)。 The obtained polyoxyester rigid foam density is 45kg/m3, thermal conductivity is 7. 21mW/(m.k). Dimethylethanolamine (DMEA) was used as a catalyst for low density polyurethane foam. 25 parts of ternary oil, 35 parts of gasified hydrocarbon, 20 parts of Freon-II, 31 parts of DC-I, 2 parts of polyethylene glycol-polypropylene glycol, 0.5 parts of T-based cellulose, 2 parts of DMEA, dimethylcyclohexyl Mix 0-5 parts of amine with water, add crude MDILOO parts, and make a polyurethane foam with a density of 8 kS/nis, which has good aging resistance, flame resistance and moisture resistance.
