Preparation of polyacetals/cyclic acetals from polyketone

Details Preparation of polyacetals/cyclic acetals from polyketone Preparation of polyacetals/cyclic acetals from polyketone

1990-07-10

1992-02-25

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528392, 528488, 528493, 528494, 528495, 528496, 528499, C08G 6702

Patent

active

050914863

ABSTRACT:
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 e.g. para-toluenesulphonic acid while continuously removing water generated by the reaction. Water is preferably removed by azeotropic distillation using a water-immiscible solvent.

REFERENCES:
patent: 4826932 (1989-05-01), Wong

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