Abstract Hexamethylol melamine resins (HMM) with low crystallization water content and low viscosity were prepared by inhibiting the condensation polymerization of low hexamethylol melamine. The effects of catalyst, pH, formalde-hyde/melamine ratio, reaction temperature and time on the synthesis parameters of HMM were investigated. The results showed that the sample (HMM8) synthesized with Na2CO3-NaHCO3 as catalyst had the crystallization water content lower than 10%, being with a viscosity of about 0.26 Pa·s. The melting temperature of HMM8/polyvinyl alcohol (PVA) curing system was about 164.3 °C. It was found that the higher the amount of formaldehyde, the greater the hydroxyl methyl bounded to each triazine ring. Compared with the traditional melamine formaldehyde resin which had the crystallization water content of about 20–30%, the production of this resin was expected to reduce the energy consumption of industrial reaction, while the resin with 10% crystallization water content was more conducive to the development of alloying HMM/PVA composite membrane.

中文翻译：

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六羟甲基三聚氰胺/聚乙烯醇复合膜低结晶水低粘度六羟甲基三聚氰胺树脂的制备

摘要 通过抑制低六羟甲基三聚氰胺的缩聚反应，制备了低结晶水、低粘度的六羟甲基三聚氰胺树脂（HMM）。考察了催化剂、pH、甲醛/三聚氰胺比、反应温度和时间对HMM合成参数的影响。结果表明，以Na2CO3-NaHCO3为催化剂合成的样品(HMM8)结晶水含量低于10%，粘度约为0.26 Pa·s。HMM8/聚乙烯醇（PVA）固化体系的熔融温度约为164.3°C。发现甲醛的量越高，与每个三嗪环结合的羟甲基越大。与结晶水含量在20-30%左右的传统三聚氰胺甲醛树脂相比，