申请人:DAINICHISEIKA COLOR
& CHEMICALS MFG. CO. LTD.
公开号:EP0761711A2
公开(公告)日:1997-03-12
A PVA-base copolymer is obtained by subjecting a lactone, whose ring is formed of 3 to 10 carbon atoms, to ring-opening polymerization in the presence of polyvinyl alcohol (PVA). The copolymer comprises a PVA chain and an aliphatic polyester grafted as a ring-opened polymer of the lactone on the PVA chain. Further, the copolymer has a PVA content of 2 to 98 wt.%, a polyester content of 98 to 2 wt.%, and a number average molecular weight of 10,000 to 500,000.
一种 PVA 基共聚物是通过在聚乙烯醇 (PVA) 存在下,将由 3 至 10 个碳原子组成环的内酯进行开环聚合而得到的。共聚物由 PVA 链和脂肪族聚酯组成,脂肪族聚酯作为内酯的开环聚合物接枝在 PVA 链上。此外,该共聚物的 PVA 含量为 2 至 98 wt.%,聚酯含量为 98 至 2 wt.%,平均分子量为 10,000 至 500,000。