Method for preparing bis[3-chlorin-4-di(2,3- epoxy propyl) aminophenyl] methane

Abstract

The molar ratio of epichlorohydrin and 3,3'-dichloro-diaminodiphenyl-methane is 8 to 16:1, the reflux reaction is carried out in the mixed solvent of alcohol and water by the weight ratio of 1: 0.3 to 6 for 8 to 20 hours at 50 to 100 DEG C, 30 percent by weight of sodium hydroxide solution is added into the reaction product for reaction for 3 to 6 hours at 50 to 60 DEG C, the salt, the alkali and the water are removed by toluene extraction, the toluene is distilled by reduced pressure, so as to get the light yellow sticky and thick resin, the yield is 90 to 95 percent, the epoxy value is 0.60 to 0.70 and the viscosity (50 DEG C) is 2 to 4Pa.S. The epoxy resin is solidified for 2.5 hours at 180 to 190 DEG C by using methyl tetrahydrophthalic anhydride, the thermal deformation temperature of the solidified material is 165 DEG C, the Rockwell hardness is 90 and the oxygen index is 27.5.

Description

1. Technical field

[0001] The present invention relates to a preparation method of tetraglycidylamine compound, more specifically to a preparation method of bis[3-chloro-4-bis(2,3-epoxypropyl)aminophenyl]methane. 2. Background technology

[0002] As we all know, tetraglycidyl-4,4'diaminodiphenylmethane (TGDDM) is a compound with excellent heat resistance, which can be used as matrix resin for carbon fiber reinforced composite materials, various coatings, electrical insulation materials, layers pressure materials, structural materials and civil construction materials, etc. However, it has recently been found that the compound has a water absorption rate of 5%, and is very sensitive to moisture under high temperature and high humidity, and the glass transition temperature drops by about 100°C, resulting in a decrease in compressive strength and interlaminar shear strength. For this reason, the aerospace industry requires the emergence of a matrix resin for cutting-edge compos...