PBS- and silica-based composites

摘要

The present invention relates to PBS- and silica-based composites, said composites having a high swelling ability. It also relates to a method of preparing said composites, a method of swelling said composites and films obtained by swelling said composites.

主权项

1. A process for preparing a poly(butylene succinate) (PBS)- and silica-based composite, comprising the following two steps:
formation of oligomers by reacting succinic acid or at least one succinic acid diester with 1,4-butanediol (step 1) and a branching agent, and transesterification and coupling of the oligomers formed in the first step (step 2),and comprising the addition of colloidal silica in situ at the beginning of or during step 1 or at the beginning of or during step 2.