家电卷材涂料用HDI改性聚酯树脂的研制

以己二异氰酸酯（HDI）改性聚酯树脂与氨基树脂配制成家电用卷材涂料。阐述了氨酯键对涂膜性能的贡献。探讨了HDI用量对涂膜性能的影响。     

层析法分离提取葡萄籽原花青素的进一步研究

以吸附量和解吸率为指标,比较了7种大孔吸附树脂对原花青素的静态吸附解吸性能并考查了AB—8树脂对原花青素的吸附特性及机理。实验结果表明:AB—8树脂是较理想的吸附剂;在溶液中AB—8树脂对原花青素的吸附达到平衡的时间为240 min,吸附行为符合Langmuir等温方程;最佳动态吸附参数原花青素提取液浓度4.0 mg/mL,吸附流速2 BV/h(1BV=13.03 mL)用40%乙醇溶液洗脱。AB—8树脂适合于柱层析操作分离原花青素。     

动态硫化技术及其发展

结合动态硫化技术的发展史,重点评述了国外80年代该技术的发展及其特点,揭示了TPV性能及特征与制备条件的关系;简介我国开发研究TPV的概况,并提出了看法。     

Synthesis and characterization of superabsorbent hydrogels composites based on polysuccinimide

A kind of novel superabsorbent hydrogel with high swelling ratio property that could be used for the development of water absorbing resin, soil water retention agent, and chemical sand‐fixing material was synthesized in this study. The hydrogels were prepared by the crosslinking reaction of polysuccinimide (PSI). The relationships between swelling ratio and volume of solvent as well as the concentration of crosslinking agent were investigated in detail. Several composites, such as starch, carrageenan, and polyacrylamide, were added into hydrogels to enhance the swelling ratio. It was found that the swelling ratio was significantly increased, which the maximum water absorbency was enhanced 2.46 times when the composite polyacrylamide (PAM) was added compared to the control. The effects of ionic strength and sensitivity of pH on hydrogels were also studied. The modified hydrogels products with swelling ratio less sensitivity to the salinity as well as relative high swelling ration in salinity system were also obtained by adding PAM. Through the Fourier transform infrared spectroscopy (FTIR) characterizations, the crosslinking reaction mechanism and the structure of composite were proposed. In addition, the transmission electron microscopy (TEM) examinations showed that some composite materials elevated the physical crosslinked and connected channels density substantially. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 550–557, 2006     

环氧树脂-聚丙烯酸酯乳液型复合薄膜粘合剂

本文主要叙述了环氧-丙烯酸酯聚合乳液的合成,以及该乳液粘合剂的配制;讨论了该乳液粘合剂的粘合性能及耐水、耐溶剂性能。     

提高PVC糊树脂质量小结

叙述了降低PVC糊树脂产品中氯乙烯残留量、稳定糊黏度的措施。通过改进，提高了产品质量。     

高固体分丙烯酸树脂相对分子质量的研究

采用溶液聚合法合成高固体分丙烯酸树脂,用凝胶渗透色谱(GPC)法分析引发剂的种类和用量、反应温度及聚合工艺对丙烯酸树脂的相对分子质量及其分布的影响。结果表明,选用偶氮二异丁腈和过氧化苯甲酰两种引发剂进行复配可提高聚合物的相对分子质量;采用“饥饿态”聚合工艺进行聚合反应可有效控制聚合物的相对分子质量,且相对分子质量分布均匀,分散度小于2;当引发剂用量为2%,在110℃的反应条件下制得的丙烯酸树脂的综合性能优异,固含量超过70%,相对分子质量可达4万。     

高性能自干型汽车用面漆的研制

用酯化法制得高性能丙烯酸改性醇酸树脂,并用该树脂配制成施工方便,干燥迅速,抗回黏性、耐沾污性、耐候性及耐油性好的单组分汽车涂料。介绍了该树脂及涂料的配方设计、生产工艺和产品性能。     

Recent studies of self-condensation and co-condensation of melamine-formaldehyde resins; cure at low temperatures

Self-condensation: recent research on the chemical pathways by which alcoholated melamine-formaldehyde (MF) resins react with themselves and on the product structures is summarized. Model compound studies suggest that bridges are less stable than widely thought unless they are in hexahydro-1,3,5-triazine ring structures. In acyclic structures they are probably less stable than bridges. Co-condensation: studies of how the composition of MF resins influences the rates of reaction with poly(ol) co-reactant show that MF resins that contain very low levels of and/or functionality are quite reactive. Reactivities of a variety of poly(ester) and acrylic coreactants were studied. By combining reactive MF resins with reactive co-reactants one can formulate high solids enamels that cure by co-condensation in 30 min at 50 to 65 °C with 0.5 parts per hundred (phr) of p-toluenesulfonic acid (p-TSA) catalyst. Cure at 25 °C appears feasible with higher catalyst levels.