含氧化叔胺侧基的水溶性酚醛树脂的制备与性能

为了得到一种具有热致亲和性变化的酚醛树脂,应用于热敏成像体系中,制备和表征了一种新型含氧化叔胺侧基的水溶性酚醛树脂。首先,二甲胺与甲基丙烯酸甲酯通过加成反应,随后水解制得3-二甲胺基丙酸。其次,3-二甲胺基丙酸通过双氧水氧化,生成氮氧化3-二甲胺基丙酸。再次,酚醛环氧树脂与氮氧化3-二甲胺基丙酸反应得到水溶性改性酚醛树脂。对制备的树脂的热行为和热致溶解性变化性能进行了研究。研究发现,改性酚醛树脂在120℃下加热10min仍然能在水中溶解,其溶解性几乎没有改变。但是,当温度加热到140℃时,该树脂变得完全不溶于水。这种改性酚醛树脂具有良好的成膜性能,涂布后可形成均匀的膜并能很强地附着于版基上。

Synthesis and Properties of Water-Soluble Phenolic Resin Containing Oxidized Tertamine Groups

This paper mainly focused on the synthesis and properties of a novel water-soluble phenolic resin with side groups of tertiary amino oxide, which can be possibly applied in thermal imaging applications. Firstly, 3-（dimethylamino） propanoic acid was synthesized by the addition reaction of dimethylamine with methyl acrylate followed by the hydrolysis of the adduct. Secondly, 3-（dimethylamino） propanoic acid was oxidized with hydrogen peroxide to yield 3-（dimethylamino） propanoic acid oxide; Finally, epoxy phenolic was reacted with 3-（dimethylamino） propanoic acid oxide to give the water soluble modified phenolic resin. Thermal behaviors and thermo-induced solubility change of the prepared resin were investigated. It was found that the modified epoxy phenolic resin could still dissolve in water after being heated at 120℃ for 10 rain, and the solubility remained almost unchanged. But upon being heated at the temperature of 140℃, the resin became completely insoluble in water. This modified epoxy phenolic resin had excellent film forming property, and its aqueous coating formed uniform films with strong adhesive attraction to substrate.