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US 9,200,113 B2Granted
Multi-amine functional oligomers and method for producing the same by the reduction of corresponding oximes
AssigneeCovestro Deutschland AG
InventorsChristoph Gürtler, Thomas Ernst Müller, Ewa Gebauer, Henning Vogt, Yevgen Berezhanskyy, Burkhard Köhler, Walter Leitner
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Abstract
The invention relates to multi-amine functional oligomers and multi-oxime functional oligomers in addition to a method for producing the same by means of the co-polymerization of carbonyl carriers such as olefins or dienes, reaction with hydroxylamine and a subsequent selective catalytic hydrogenation.
Claims4
A method for producing a multi-amine functional oligomer, comprising
- copolymerizing carbon monoxide and at least one olefin by a free-radical mechanism to form a copolymer which comprises at least one carbonyl group,
- reacting the at least one carbonyl group of the resultant copolymer with hydroxylamine to form a multi-oxime functional oligomer, and
- reducing the multi-oxime functional oligomer to a multi-amine functional oligomer;
- wherein the reduction proceeds by hydrogenation using molecular hydrogen and wherein the hydrogenation proceeds in the presence of ammonia.
1 more element
Dependencies are inferred from the claim text.