Preparation method of water-based radix asparagi polyurea resin and water-based radix asparagi polyurea resin
A kind of aspartame resin and water-based technology, which is applied in the preparation of water-based aspartame resin, and in the field of water-based aspartame resin, can solve the problems of poor sealability of coating film, general heat resistance, slow curing speed, etc., and achieve Good water resistance, good adhesion, and the effect of increasing toughness
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[0018] combined with figure 1 , the invention provides a kind of preparation method of waterborne aspartame resin, comprising:
[0019] A preparation method of water-based aspartic polyurea resin, in an inert gas atmosphere, adding unsaturated fatty acid diester dropwise to glycidyl ether dibasic primary amine adducts, reacting at 80-120°C for 2-36 hours, and then Dry to obtain a water-soluble aspartame resin.
[0020] The molar ratio of the glycidyl ether dibasic primary amine adduct to the unsaturated fatty acid diester is 1: (1.6-2.1).
[0021] The preparation method of the glycidyl ether dibasic primary amine adduct comprises: adding the dibasic primary amine into the reaction kettle, raising the temperature to 40-100°C, adding the glycidyl ether dropwise, keeping the temperature for 1-3 hours, and strictly controlling the reaction temperature , to obtain glycidyl ether dibasic primary amine adducts.
[0022] The molar ratio of the glycidyl ether to the primary diamine ...
Embodiment 1
[0030] A preparation method of water-based aspartame polyurea resin, comprising:
[0031] The maleic acid diester is added dropwise to the glycidyl ether dibasic primary amine adduct, reacted at 80-120° C. for 2-36 hours, and then dried to obtain water-soluble aspartic polyurea resin.
[0032] The preparation method of the glycidyl ether dibasic primary amine adduct comprises: adding the dibasic primary amine into the reaction kettle, raising the temperature to 40-100° C., adding the glycidyl ether dropwise, keeping the temperature for 1-3 hours, and strictly controlling the reaction temperature. Preparation of glycidyl ether dibasic primary amine adducts. Preferably, the speed of dripping glycidyl ether in the present invention is controlled within 2 hours, and cooling measures are taken at the same time.
Embodiment 2
[0034] A preparation method of water-based aspartame polyurea resin, comprising:
[0035] S1, equipped with agitator, circulating cooling water, N 2 Add 270 g of methylcyclohexanediamine to the glass reactor with a through pipe, add 400 g of glycidyl ether with an epoxy value of 0.5 dropwise with a constant pressure separatory funnel, raise the temperature to 80 ° C, and control the drop rate for 2 hours to complete the dropwise addition. After the addition is completed, heat preservation reaction for 2 hours to obtain a glycidyl ether dibasic primary amine adduct;
[0036] S2, on the basis of S1, slowly add diethyl maleate 350g, N 2 React under protection at 100°C for 12 hours, determine the end point of the reaction by measuring the primary amine, and obtain the unsaturated fatty acid diester modified glycidyl ether binary primary amine adduct, that is, a water-based aspartame resin.
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