Initial heating of the phenol and formaldehyde (in the presence of an acid or base to get the reaction going) produced a shellac-like liquid good for coating surfaces like a varnish.
开始加热，酚和甲醛(需有酸或碱促使其反应进行)便产生了像紫胶样的液体，能像清漆一样涂于物体表面。
2
Wood liquefaction refers to turn the timber into the hot chemical course of the similar and liquid sticky form fluid under the function in organic matter, such as acid, phenol, etc.
木材液化是指在酸、苯酚等有机物的作用下，将木材转化为类似液体的黏稠状流体的热化学过程。
3
Nonylphenols is an important chemical raw materials and intermediates, appearance at normal temperature colorless or light yellow liquid, with phenol odour, insoluble in water.