Application of dimethyl...

Application of dimethyl ethanolamine (DMEA) in polyurethane catalyst

As early as 60s, two methanolamine (DMEA) has been used as a cheap catalyst for polyurethane foam industry. It can be used alone or in conjunction with other amine catalysts for soft polyurethane bulk foam, molding foam and rigid foam.

Two methyl ethanolamine (DMEA) is also used as raw material for preparing other high-performance amine catalysts (such as Niax A-1), using two methyl ethanolamine (DMEA) as the catalyst for rigid polyurethane foam. The frothing period of the foam is 15s, rising time is 146S, and two methanethanolamine (DMEA) is used. As a catalyst for semi rigid polyurethane foam, the molding foam density is 114kg/m3, which has improved damping properties. It is used as a vehicle vibration absorber. In the chemical agent two methyl ethanolamine (DMEA) In the presence of two butyltin in two lauric acid, a polyurethane reaction injection molding product with good coating properties can be prepared from the reaction of low molecular weight polyether polyols, chain extender and aromatic isocyanate. The two methyl ethanolamine (DMEA) is used as the accelerator for the preparation of polyurethane rigid foam for making the refrigerator's adiabatic body. 100 hydroxypropyl aryl two amine and F-338 (surfactant) are prepared. I.5, R-Il, 25 DMEA2.0, 0.5 calcium stearate and 130 polyisocyanates were mixed. The polyoxyethylene rigid foams were prepared with a density of 45kg/m3 and a thermal conductivity of 7. 21mW/ (m.k). Two methyl ethanolamine (DMEA) was used. A catalyst for low density polyurethane foam was prepared. The mixture of three yuan, 25 parts, 35 fractions of gasified hydrocarbon, 20 parts of freon -II, 2 parts of polyglycol two words, 20 polypropyl glycol, 0.5 parts of DC-I931 cellulose, 0.5 parts of DMEA2 cellulose, 0.5 parts of 0_, two methyl cyclohexanamine 0_ 5 and water were added. The polyurethane foam with density of 8kS/nis was prepared by adding crude MDILOO parts, and had good aging resistance, fire resistance and moisture resistance.