| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a heat resistant, liquid phenol novolak resin excellent in flowability, moisture absorption resistance and heat resistance and to provide a product obtained therefrom. SOLUTION: The method for manufacturing a heat resistant, liquid phenol novolak resin comprises reacting 100 pts.wt. of a liquid phenolic resin having a structure represented by formula (1), wherein R1 is a 1-4C alkyl or an aryl group; R2 is -CH2-, formula (2) or formula (3); and n is an integer with 3-80 pts.wt. of at least one compound selected from the group consisting of aromatic tetracarboxylic acids, aromatic tetracarboxylic dianhydrides and derivatives thereof, and aromatic diamines. The product is derived from the resin.
|
