Preparation of polyacetals

Details Preparation of polyacetals Preparation of polyacetals

C - Chemistry, Metallurgy

08

G

402/7.1

C08G 67/00 (2006.01) C08G 67/02 (2006.01)

Patent

CA 2021472

Case 7301(2) ABSTRACT OF THE DISCLOSURE PREPARATION OF POLYACETALS A process for preparing polyacetals having less than 10% by weight carbonyl containing units and in which the molar ratio of acetal to furan units is greater than or equal to 15:1 is provided. The process comprises reacting a linear alternating polymer of carbon monoxide with one or more olefins (polyketone) with a diol at elevated temperature in the presence of an acid eg para-toluenesulphonic acid whilst continuously removing water generated by the reaction. Water is preferably removed by azeotropic distillation using a water-immiscible solvent.

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