Method for producing formaldehyde/co2 copolymers
AssigneeBayer MaterialScience AG
InventorsThomas Ernst MÜLLER, Christoph GÜRTLER, Henning VOGT, Mario KRAUTSCHICK, Walter LEITNER
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Abstract
The invention relates to a method for producing non-alternating formaldehyde/CO2 copolymers, said method comprising the step of reacting formaldehyde or a compound that releases formaldehyde with carbon dioxide in the presence of a catalyst system. Said method is characterised in that the catalyst system comprises a Lewis acid component and a basic component, the Lewis acid component being at least temporarily coordinatively unsaturated under reaction conditions and the basic component having a pKb value of >=0.
Claims17
-15. (canceled)
A process for preparing nonalternating formaldehyde/CO2 copolymers, comprising the step of reacting formaldehyde or a formaldehyde-releasing compound with carbon dioxide in the presence of a catalyst system,
- wherein
- the catalyst system comprises a Lewis-acidic component and a basic component,
- the Lewis-acidic component under reaction conditions is at least intermittently coordinatively unsaturated and
- the basic component has a pKb of ≧0.
Dependencies are inferred from the claim text.