2402树脂的改性及烷基酚-甲醛树脂的合成

主要围绕热敏CTP版材用酚醛树脂的合成及成像性能进行了研究。首先,2402树脂用苯酚、甲醛进行改性,得到碱溶性好、成像性能优的成膜树脂。其二,利用邻甲酚、对甲酚、对叔丁基酚及其混合物在不同催化剂下,合成主链醚化的酚醛树脂或末端带羟甲基的酚醛树脂。主链醚化树脂用于阳图热敏CTP版材具有酸解活性的成膜树脂;高分子链末端带有羟甲基,在预烘过程中,羟甲基可发生交联固化作用,弱碱显影得到阴图图像,其成像性能较好。

ODIFICATION OF 2402 RESIN AND SYNTHESIS OF ALKYL PHENOL FORMALDEHYDE RESIN

Phenol formaldehyde resins for the thermal sensitive CTP plates were synthesized and their imaging performance was studied in the paper.Firstly 2402 resin was modified by the phenol and formaldehyde.The resulting binder resins were soluble in dilute alkali aqueous and had good imaging performance.Secondly,o cresol,p cresol,p tert butyl phenol and their mixture reacted with formalin in the presence of catalysts.Then novolac and resol resins which ether groups in the main chain and hydroxy methyl groups at the terminal of the polymer were obtained.The resins with ether groups could be used for acid composed binder resin of positive thermal sensitive CTP plates.The polymers with small account of hydroxy methyl groups at the terminal might be crosslinked and cured when they heated,and then developed to result in negative graph with good performance.