The invention belongs to the field of new chemical materials or building adhesive curing agent technology provides a self toughening epoxy resin curing agent, by nonylphenol, paraformaldehyde and ethylenediamine, component for molar ratio of 1.2mol to 1.8mol: nonylphenol; ethylenediamine 1.5mol ~ 2.2mol; paraformaldehyde 0.6mol ~ 1.2mol. The invention also provides a preparation method of curing agent the self toughening epoxy resin, which comprises the following steps: a) according to the molar ratio of nonylphenol will be added to the reactor; b) adding the mole ratio of ethylenediamine, stirring at room temperature for 4-6 minutes; c) and the molar ratio of the added edge edge heating paraformaldehyde, heating to 75-85 Deg. C, heat 1.5-2.5 hours. The self curing epoxy resin curing agent can be obtained by cooling down to 20-25 DEG C. The shear strength, tensile strength and impact strength of the self toughening epoxy resin curing agent are enhanced, and no dehydration operation is needed, and the process is completed step by step and has simple process.
【技术实现步骤摘要】
本专利技术属于化工新材料或建筑胶粘剂固化剂
,具体涉及到一种环氧树脂体系的曼尼希改性固化剂的制备。
技术介绍
目前,胺类和改性胺类固化剂对环氧树脂体系是最实用的,改性胺类固化剂的配方主要是以脂肪族和脂环族胺为基础来改性的。环氧树脂固化物断裂伸长率低,脆性大,粘接件不耐疲劳,为此需对其进行增韧改性。按增韧机理可分为化学增韧和物理增韧。近年来研究较多的增韧剂主要有橡胶类弹性体、热塑性树脂、纳米材料、液晶聚合物和柔性固化剂,而柔性固化剂主要有长链烷基胺、酚醛改性胺固化剂。现已有的酚醛改性胺固化剂缺点是固化产物太脆,耐水和耐潮湿的性能不理想。腰果酚醛及壬基酚醛改性胺固化剂是具有自增韧的酚醛改性胺固化剂。腰果酚醛改性胺已有文献和公开专利,而壬基酚醛改性胺暂未见公开报道。
技术实现思路
针对现有技术的缺陷,本专利技术提供了一种自增韧环氧树脂固化剂,该自增韧环氧树脂固化剂剪切粘接强度、拉伸强度和耐冲击强度都有增强,且无需脱水操作,一步完成,工艺简单。本专利技术提供了一种自增韧环氧树脂固化剂,由壬基酚、多聚甲醛和乙二胺组成,各组分所占摩尔比例为壬基酚1. 2 mol 1. ...
【技术保护点】
1.一种自增韧环氧树脂固化剂,其特征是,由壬基酚、多聚甲醛和乙二胺组成,各组分所占摩尔比例为:壬基酚: 1.2 mol~1.8mol乙二胺: 1.5 mol~2.2 mol多聚甲醛: 0.6 mol~1.2 mol。
【技术特征摘要】
【专利技术属性】
技术研发人员:谢建军,黄凯,冉德龙,李娜,
申请(专利权)人:中南林业科技大学,
类型:发明
国别省市:43
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