Production of tetrahydrofuran polymers, useful e.g. as diol components for polymer production

摘要

Polytetrahydrofuran (PTHF) or copolymers or di- or mono- esters thereof, are produced by polymerization of THF in presence of telogen(s) and/or comonomer(s) on acid-activated calcium montmorillonite catalysts with a BET surface of /- 300 m<2>/g, an acidity of /- 0.02 mmol/g at a pKs <= ?-3 and a pore volume of /- 0.40 cm<3>/g for pore sizes of 30-200 Angstrom .