METHOD OF FORMING SEMICRYSTALLINE POLYETHERIMIDE, AND POLYETHERIMIDE-CONTAINING COMPOSITION
申请人:SABIC Global Technologies B.V.
公开号:EP3741792A1
公开(公告)日:2020-11-25
In a method of forming a semicrystalline polyetherimide, a solvent mixture is combined with an amorphous polyetherimide in a weight ratio of 1:1 to 50:1, respectively, to form a first dispersion. The solvent mixture includes dichloromethane and a C1-C6 alkanol in a weight ratio of 0.5:1 to 15:1, respectively. The first dispersion is agitated to form a second dispersion containing a semicrystalline polyetherimide, and the semicrystalline polyetherimide is isolated from the second dispersion. The isolated semicrystalline polyetherimide exhibits a melting point in a range of 230 to 300 °C. Also described is a composition that includes a polyetherimide, dichloromethane, and a C1-C6 alkanol in specific ratios.
在一种形成半结晶聚醚酰亚胺的方法中,将溶剂混合物与无定形聚醚酰亚胺分别以 1:1 至 50:1 的重量比混合,形成第一分散液。溶剂混合物包括重量比分别为 0.5:1 至 15:1 的二氯甲烷和 C1-C6 烷醇。搅拌第一分散液以形成含有半结晶聚醚酰亚胺的第二分散液,并从第二分散液中分离出半结晶聚醚酰亚胺。分离出的半结晶聚醚酰亚胺的熔点范围为 230 ℃ 至 300 ℃。还描述了一种组合物,该组合物包括特定比例的聚醚酰亚胺、二氯甲烷和 C1-C6 烷醇。