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Preparation method of tetramethylolmethane-tri (3-aziridine) propionate
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Paragraph 0006, (2017/06/02)
A preparation method of tetramethylolmethane-tri (3-aziridine) propionate includes the steps: (1) mixing tetramethylolmethane with acrylic acid, adding methylbenzene and adding para-toluenesulfonic acid and hydroquinone while stirring the materials; (2) placing the materials in an oil bath, stirring and heating the materials and performing reflux reaction; (3) cooling the materials to reach room temperature, filtering reaction liquid, transferring the filtered reaction liquid into a separating funnel and neutralizing the reaction liquid by NaOH solution; (4) washing a separated oil layer after standing and layering; (5) performing reduced pressure distillation for the separated oil layer after standing and layering to obtain light yellow transparent liquid; (6) dripping aziridine into the light yellow transparent liquid kept being stirred, and transferring the liquid into a brown bottle; (7) placing the brown bottle in a dark place at the room temperature for 24 hours to obtain the tetramethylolmethane-tri (3-aziridine) propionate. An organic compound prepared by the preparation method is used for curing water-soluble polyurethane dispersoid to obtain a strippable protection film layer with the stripping strength of 300-500 newtons per meter.