| 摘要 |
PURPOSE:To improve the film intensity, acid resistance and release properties at room temperature by using specified monoalkyl substituted phenol- formaldehyde novolak resin. CONSTITUTION:The title electronic part protective material is composed of monoalkyl substituted phenol-formaldehyde novolak resin. In this case, the alkyl radical is normally composed of 6-12 carbon elements preferably 6-8. The position of alkyl radical in the monoalkyl substituted phenol of alkyl radical is either metha or para to hydroxyl radical preferably para e.g., p- hexylphenol, p-octylphenol, p-nonylphenol, p-decylphenol, p-undecylphenol, p- laurylphenol, etc., can be enumerated. By using said materials, the film intensity, acid resistance of said materials can be improved enabling them to be released easily at room temperature.
|
