| 摘要 |
<p>A novolak resin composition characterized by at least one unit of the reaction product of a para-, para-bonded bisphenol having formula (A) wherein R1 = hydrogen, lower alkyl group having 1-4 carbon atoms, halogen, or lower alkoxy group having 1-4 carbon atoms; wherein R2 = hydrogen or lower alkyl group having 1-4 carbon atoms; and wherein X is selected from the group consisting of: CH2, CH(CH3), C(CH3)2, O, and S; with a bismethylol monomer selected from a difunctional ortho-, ortho-phenolic bismethylol of Formula (B), a difunctional ortho-, para-phenolic bismethylol of Formula (C), wherein R3 is selected from CH3, CH2CH3, Cl, and Br; and wherein R4 is selected from H and CH3.</p> |
