| abstract |
(57) [Summary] [Structure] 10 to 90% by weight of a polymer of a conjugated diene having 4 to 5 carbon atoms and 90 to 10% by weight of a hydrocarbon diene having 4 to 15 carbon atoms in the presence of an acid catalyst. For olefins, Method for producing phenol resin to which phenols are added, method for producing epoxy resin by reacting the phenol resin with epihalohydrin, laminate resin, encapsulant, solder resist, photocuring using the phenol resin and epoxy resin Various compositions such as sex. [Effect] The phenol resin and epoxy resin produced by the above-mentioned production method can be used for various compositions such as laminates, encapsulants, solder resists, and photocurability. The cured product obtained from the composition is a dielectric composition. It has excellent electrical properties such as modulus and dielectric loss tangent, heat resistance, adhesion and moisture absorption resistance. |