Isocyanate-free synthesis of carbonate-modified polymers
AssigneeEvonik Degussa GmbH
InventorsChristina Cron, Gabriele Brenner
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Abstract
The present invention relates to an isocyanate-free and preferably solvent-free process for preparing polymers containing five-membered cyclic carbonate groups. In particular, the present invention is directed to a process for preparing polymers bearing cyclic carbonate groups by reacting carboxyl-bearing polymers selected from the group including polyesters based on di- or polyols and di- or polycarboxylic acids or derivatives thereof or poly(meth)acrylates, with hydroxyl-functionalized five-membered cyclic carbonates, without addition of isocyanates.
Claims20
A two-stage process for preparing polymers bearing five-membered cyclic carbonate groups by reacting carboxyl-bearing polymers selected from the group comprising polyesters based on di- or polyols and di- or polycarboxylic acids or derivatives thereof or poly(meth)acrylates, with hydroxyl-functionalized five-membered cyclic carbonates, without addition of isocyanates.
Dependencies are inferred from the claim text.