WBP glue knowledge

酚醛树脂胶水

酚醛胶一般指酚醛树脂胶水

酚醛树脂胶水是由酚醛树脂制成的胶水，酚醛树脂是最早工业化的合成树脂，也是首先出现的合成胶粘剂，还是改性制得的第一种结构胶粘剂，最先用于航空工业。

定义

酚醛树脂是由苯类与醛类在催化剂存在下经缩聚反应制得，用作胶粘剂的是相对分子质量为500-1000的低聚物。

尽管新型胶粘剂的出现，在很多方面取代了酚醛树脂胶粘剂，但因本身的独特优点，其重要性还是不减当初，仍会有较大的发展和应用。

特点与应用

酚醛树脂胶粘剂具有如下一些特点：

酚醛树脂极性较大，对金属和多数非金属都有良好的粘接性，粘接强度较高。由于酚醛树脂中存在着大量的苯环，又能交联成体形结构，刚性较大，因而耐热性高，抗蠕变，耐烧蚀，尺寸稳定性好。耐水、耐油、耐磨、耐化学介质、耐霉菌、耐老化等，电绝缘性能优良。本身易于改性，也能对其他胶粘剂改性。脆性大，剥离强度低，不耐冲击，震动。需要高温高压较长时间固化，收缩率较大，胶层颜色较深。 [1] 

未改性

酚醛树脂胶水包括未改性酚醛树脂胶水和改性酚醛树脂胶水。未改性酚醛树脂胶水主要用于粘接木材，制造耐水胶合板，航空胶合板，船舶板，车厢板，高级刨花板等。还可生产镁碳耐高温砖。

改性

改性酚醛树脂胶水可做结构胶粘剂，粘接金属或非金属，制造蜂窝结构，刹车片，砂轮，金刚砂纸，复合材料等，在航空，航天，机械，军工，汽车，船舶，电气等工业部门都获得了广泛的应用。还可用于对其它胶粘剂的改性，提高耐热性，耐老化性，耐水性和粘接强度等。

参考资料

• 1.
•   
• 酚醛树脂胶水的特点与应用浅析  ．中国保温网[引用日期2015-12-11]
• 附：英文版

Phenolic resin glue

Phenolic glue generally refers to phenolic resin glue

Phenolic resin glue is the glue made of phenolic resin. Phenolic resin is the earliest industrial synthetic resin, and also the first synthetic adhesive. It is also the first structural adhesive made by modification, and it was first used in aviation industry.

define

Phenolic resin is prepared by polycondensation reaction between benzene and aldehydes in the presence of catalyst. It is used as adhesive for oligomers with a relative molecular weight of 500-1000.

Although the emergence of new adhesives has replaced phenolic resin adhesives in many aspects, but because of its unique advantages, its importance is still not reduced at the beginning, there will still be greater development and application.

Features and Applications

Phenolic resin adhesive has the following characteristics:

Phenolic resin has high polarity, good adhesion to metal and most non-metal, and high adhesion strength.Due to the presence of a large number of benzene rings in phenolic resin and its crosslinking structure, the phenolic resin is rigid and has high heat resistance, creep resistance, ablative resistance and good dimensional stability.Water resistance, oil resistance, abrasion resistance, chemical media resistance, mold resistance, aging resistance, excellent electrical insulation performance.It is easy to modify itself and can also modify other adhesives.High brittleness, low stripping strength, poor impact resistance and vibration resistance.High temperature and high pressure are required for a long time to cure, with a larger shrinkage and a darker adhesive layer.[1]

unmodified

Phenolic resin glue includes unmodified phenolic resin glue and modified phenolic resin glue.Unmodified phenolic resin glue is mainly used to bond wood, produce waterproof plywood, aviation plywood, ship board, carriage board, advanced particleboard, etc.Also can produce magnesium carbon high temperature resistant brick.

modified

Modified phenolic resin glue can be used as structural adhesive, bonding metal or non-metal, manufacturing honeycomb structure, brake pad, grinding wheel, emery paper, composite materials, etc. It has been widely used in aviation, aerospace, machinery, military industry, automobile, ship, electrical and other industrial sectors.It can also be used to modify other adhesives to improve heat resistance, aging resistance, water resistance and bonding strength.

The resources

1.

• A Brief analysis on the characteristics and application of phenolic resin glue.China Insulation Net [reference Date 2015-12-11]