- Carboxylic acid hemiacetal ester compound preparation method of vinyl aromatic-conjugated diene block copolymer using the same and hot melt adhesive composition comprising the block copolymer

摘要

In the present invention, a novel carboxylic acid hemiacetal ester compound capable of exhibiting excellent coupling efficiency in the coupling reaction of a polymer by including a halogen group having excellent reactivity to the active site of the polymer at both terminals, a vinyl aromatic-conjugated diene A process for producing a block copolymer and a hot melt adhesive composition comprising the block copolymer are provided.