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本体法合成了六亚甲基二异氰酸酯(HDI)与三羟甲基丙烷(TMP)的加成物作为聚氨酯胶粘剂的固化剂。通过对反应产物-NCO含量和粘度的测定,考察了反应温度、催化剂二月桂酸二丁基锡(DBTDL)用量、HDI与TMP物质的量比对加成产物性能的影响,并由凝胶渗透色谱(GPC)和红外光谱(FT-IR)表征了产物组成和结构特征,获得本体法合成物HDI-TMP加成较佳工艺:n(HDI)∶n(TMP)=9∶1(即n(-NCO)∶n(-OH)=6∶1),催化剂DBTDL用量为0.05%(按TMP质量计),反应温度80℃,反应时间3h,即可制备出HDI-TMP理想加成物含量占总加成物52.66%的低粘度产物。
Ontology Synthesis of hexamethylene diisocyanate (HDI) and trimethylolpropane (TMP) adduct as a polyurethane adhesive curing agent. The effects of reaction temperature, the amount of dibutyltin dilaurate (DBTDL) and the ratio of HDI to TMP on the adduct properties were investigated by measuring the content of -NCO and the viscosity of the product. Gel permeation chromatography (HDI): n (TMP) = 9: 1 (n (-)) was obtained by GPC and FT-IR. NCO): n (-OH) = 6:1), the amount of catalyst DBTDL 0.05% (by TMP mass), the reaction temperature 80 ℃, the reaction time 3h, can be prepared HDI-TMP ideal adduct content accounted for Adduct 52.66% low viscosity product.