CATALYST AND METHOD FOR THE PRODUCTION OF POLYTETRAHYDROFURAN

摘要

Polytetrahydrofuran, polytetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerization of tetrahydrofuran in the presence of at least one telogen and/or comonomer, which is in the form of shaped catalyst bodies or catalyst particles having a volume of the individual shape of the body or particle of at least 0.05 mm³, preferably at least 0.2 mm³, in particular 1 mm³, and has at least one of the features a) and b): a) a pore radius distribution having at least one maximum in the pore radius range from 100 to 5000 Å, b) a pore volume of catalyst pores having radii of 200-3000 Å of greater than 0.05 cm³/g and/or a pore volume of pores having radii of 200-5000 Å of greater than 0.075 cm³/g and/or a pore volume of pores having radii of >200 Å of greater than 0.1 cm³/g.