Preparation of modified polymers of N-vinylpyrrolid-2-one and their use for the preparation of polymers interrupted by bridge members
AssigneeBASF SE
InventorsFerdinand Straub, Herbert Spoor, Claus Cordes
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Abstract
A process for the preparation of modified poly-N-vinylpyrrolid-2-one containing two identical reactive groups, wherein polyvinylpyrrolidone is treated with complex hydrides, with or without further reaction of the modified polyvinylpyrrolidone with a reactive bifunctional compound, to give a polymer which has a molecular weight at least 2.5 times as great as that of the starting polymer.
Claims5
A process for the preparation of a modified poly-N-vinylpyrrolid-2-one which carries 2 identical reactive groups in the molecule, wherein a polymer obtained by free radical polymerization of N-vinylpyrrolid-2-one in the presence of hydrogen peroxide as the free radical initiator is treated with a complex hydride derived from hydrides of boron and aluminum and an alkali metal ion.
Dependencies are inferred from the claim text.