Synthesis method of imino butylated amino resin

Abstract

The invention discloses a synthesis method of imino butylated amino resin. The synthesis method comprises the following steps: adding butyl alcohol and tetramethylol melamine into a reaction kettle according to a certain ratio, adjusting the rotating speed of a stirrer of the reaction kettle to 50-120r / min, adding acid to adjust the pH value to 3.0-5.0, raising the temperature to 80-95 DEG C and reacting for 30-60min while preserving the heat; adding alkaline to adjust the pH value to 8.0-10.0, gradually raising the temperature to 90-120 DEG C, and dealcoholizing and dehydrating at normal pressure; starting a vacuum pump, dehydrating under a vacuum condition for 1-3h; and filtering to obtain a colorless thick liquid product. The method is applied to the industrial production of the imino butylated amino resin, is simple in process, capable of saving energy, simple and convenient in aftertreatment, low in production cost and little in discharged wastewater and conforms to the concepts of environment friendliness and resource saving.

Description

technical field

[0001] The invention belongs to the field of chemical synthesis, and in particular relates to the synthesis of iminobutyl etherified amino resins. Background technique

[0002] Iminobutyl etherified amino resin has excellent compatibility and fast low-temperature curing performance, and is an important crosslinking agent for coatings. At present, domestic production of butanol-based butanol resins is generally based on the reaction of methyl-etherified amine-based resins with butanol to obtain mixed-etherified amine-based resins. For example, the application number is 201210554152.7. The melamine resin adopts methyl etherified hexamethylol melamine resin as a raw material, and the reaction temperature is about 80-90°C. Its synthesis temperature is high, and the content of imino group in the synthesized resin is low, which limits its application range to some extent. If the iminobutyl etherified amino resin can be synthesized in one step, the synthesis proce...