什么是酚醛树脂胶粘剂？

时间： 2024-06-01 来源：回天新材官网

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各位知道什么是酚醛树脂胶粘剂吗？本文中回天新材就来为大家介绍酚醛树脂胶粘剂，希望对各位工程师朋友有所帮助。

酚醛树脂胶粘剂是合成树脂胶粘剂中使用最早、用量最大的品种之一，广泛地应用于建筑材料加工与建筑工程、涂料与塑料、飞机、船舶、汽车与拖拉机、航空航天及轻工业等行业。酚醛树脂胶粘剂具有粘接强度高，耐高温，耐水，耐油，价格便宜，容易生产，本身易进行改性等优点。到目前为止，在合成胶粘剂领域中，按绝对用量，酚醛树脂胶粘剂仍是最大的品种之一。尤其是改性酚醛树脂胶粘剂均占有十分重要的地位。由于酚醛树脂生产原料为酚类和醛类化合物，游离酚和醛，尤其是游离甲醛对人体和环境有害，需严格控制其含量，生产不含或极少含游离酚和游离醛的酚醛树脂。国内外已经开发了环保酚醛树脂改性产品。

酚醛树脂胶粘剂品种较多，根据合成原料不同、合成条件与性能不同及应用要求不同，分类方法也不相同，很难进行统一的分类和命名。一般可将其分为两大类：酚醛树脂胶粘剂和改性酚醛树脂胶粘剂，也可按酚醛树脂使用的固化温度不同进行分类，包括高温固化型酚醛树脂胶粘剂、中温固化酚醛树脂胶粘剂和常温固化型酚醛树脂胶粘剂。

(1)高温固化酚醛树脂胶粘剂，用强碱为催化剂，反应介质PH值>10，在130~150°C下固化;用弱碱为催化剂，反应介质PH<9，形成的初期酚醛树脂用酒精溶解，在130~150℃下固化。

(2)中温固化型酚醛树脂胶粘剂，用碱为催化剂，反应介质PH>12，在反应釜中缩聚到接近中期树脂的程度，在105~115℃下固化。

(3)常温固化型酚醛树脂胶粘剂，用强碱为催化剂，形成初期酚醛树脂，以有机溶剂溶解，在酸性条件下常温固化。

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本文由雪飘梦飞转载自回天新材官网，原文标题为:什么是酚醛树脂胶粘剂，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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