环氧树脂先与三聚氰胺和脲在一定条件下反应，然后再与甲醛反应。
First, epoxy resin reacts with melamine and urea under certain conditions, and then the product reacts with formaldehyde.
结果表明，液体聚硫聚脲齐聚物的用量、齐聚物中聚脲含量对固化后的环氧树脂玻璃化温度、模量及形态有较大影响。
The results show that the level of polysulfide polyurea and the content of hard segment in polysulfide polyurea influence the morphology, T_g and modulus of cured epoxy resin.
对脲-三聚氰胺-甲醛树脂改性白乳胶进行了研究。
The modified PVAc emulsion adhesive with Urea melamine formaldehyde(UMF) resin is studied.
以液体聚硫聚脲齐聚物来增韧环氧-聚酰胺体系，用DMTA和SEM研究了固化后环氧树脂的形态结构、相分离程度和增韧效果。
The measurement of DMTA and SEM was used to study the morphology and structure of the cured epoxy, identifying the degree of phase segregation and the effect of toughening in the cured epoxy.
目的：探讨以脲醛树脂为壁材，以氯氰菊酯为囊芯物制备聚脲微胶囊的工艺条件。
Objedtive: To explore the technological conditions about preparing for microcapsules with an urea-formaldehyde resin as wall and with cypermethrin as core material.
三聚氰胺、尿素与甲醛经羟甲基化、醚化反应，生成甲醚化六羟甲基三聚氰胺和甲醚化羟甲基脲复合树脂胶。
Melamine, urea and formaldehyde underwent hydroxymethylation and etherification to yield a composed resin glue of methyl-etherified hexahydroxy methylmelamine and methyl-etherified hydroxymethylurea.
用三聚氰胺改性脲醛 树脂（MUF）胶粘剂生产MDF可以有效地提高耐水性，降低游离甲 醛释放量，并使得因管道施胶引起预固化问题得到有效控制。
Producing MDF with MUF adhesive can effectively improve the water resistance, reduce formaldehyde emission and effectively control the pre-curing problem caused by the high temperature tube-drying.
用三聚氰胺改性脲醛 树脂（MUF）胶粘剂生产MDF可以有效地提高耐水性，降低游离甲 醛释放量，并使得因管道施胶引起预固化问题得到有效控制。
Producing MDF with MUF adhesive can effectively improve the water resistance, reduce formaldehyde emission and effectively control the pre-curing problem caused by the high temperature tube-drying.
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