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以果糖代替甲醛合成类似于脲醛树脂的绿色环保型果糖尿素树脂胶黏剂。用正交实验法对反应物配比、催化剂用量、反应温度和反应时间及固化条件进行了优选。通过红外(IR)对果糖尿素树脂的结构进行了表征,并对反应机理进行了探讨,基本证实了Viswanathan所推测的机理。果糖尿素树脂胶黏剂合成的最佳工艺条件为:n(果糖):n(尿素)=6:1,催化剂用量为1.0%,反应温度为95℃,反应时间为3h。该树脂以邻苯二甲酸酐作固化剂时的最佳固化条件为:120℃,固化剂用量为8%,固化时间为2h。
To fructose instead of formaldehyde synthesis of urea-formaldehyde resin similar to the green-type urea resin resin adhesive. Orthogonal experimental method was used to optimize the ratio of reactants, the amount of catalyst, reaction temperature, reaction time and curing conditions. The structure of fructose urea resin was characterized by infrared (IR), and the reaction mechanism was discussed. The mechanism predicted by Viswanathan was basically confirmed. The optimal conditions for the synthesis of fructose urea resin adhesive were: n (fructose): n (urea) = 6: 1, the amount of catalyst was 1.0%, the reaction temperature was 95 ℃ and the reaction time was 3h. The optimum curing conditions of the resin with phthalic anhydride as curing agent are: 120 ℃, curing agent dosage is 8%, curing time is 2h.