| 摘要 |
<p>PURPOSE:To obtain a resin inexpensively suitable for a laminate for printed circuit, having improved solubility in organic solvents, by reacting an addition product of polybutadiene with alpha,beta-unsaturated dicarboxylic acid, etc. with a phenol, and formaldehyde successively. CONSTITUTION:(A) An addition product of (a) a liquid polybutadiene having a number-average molecular weight 150-50,000 with (a) alpha,beta-unsaturated dicarboxylic acid (anhydride)(e.g., maleic anhydride, etc.) is reacted with (B) a phenol in the presence of an acid catalyst, and reacted with (C) formaldehyde in the presence of a basic catalyst. A content of b in the ingredient A is 3-20wt%. In adding the ingredient B to the ingredient A, an amount of the ingredient B is one molecule based on 3-15 monomer units constituting the ingredient a.</p> |
