BASE RESIN FOR SOLDER FLUX, ROSIN BASED SOLDER FLUX AND SOLDER PASTE

摘要

PROBLEM TO BE SOLVED: To provide a base resin for solder flux exhibiting an excellent base resin action and also having excellent thermal stability and low crystallinity by a simple process.;SOLUTION: The base resin for solder flux is a reaction product obtained by bringing denatured rosins (A) obtained by adding α, β-unsaturated carboxylic acids (a1) to natural rosins (a2) under Diels-Alder reaction at an addition rate of 10 to 80 mol% into disproportionation in the presence of a dehydrogenation catalyst (B), and also comprises dehydroabietic acid of 10 to 60 wt.% and α, β-unsaturated carboxylic acid-denatured pimaric acid of 10 to 70 wt.%.;COPYRIGHT: (C)2007,JPO&INPIT