High-molecular, cross-linked polyvinyl butyrals, method for the production thereof and their use
AssigneeKuraray Specialties Europe GmbH
InventorBernd Papenfuhs
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Abstract
The present invention relates to high-molecular-weight, crosslinked polyvinyl butyrals obtainable by crosslinking a polyvinyl butyral with at least one di- and/or polycarboxylic acid or derivatives of these as crosslinking reagent, to a process for their production, and to their use.
Claims11
A high-molecular-weight, crosslinked polyvinyl butyral obtainable by crosslinking a polyvinyl butyral with at least one di- and/or polycarboxylic acid or with derivatives of these as crosslinking reagent.
The polyvinyl butyral as claimed in at least one of the preceding claims, which comprises plasticizer.
A process for preparing a polyvinyl butyral as claimed in at least one of the preceding claims, which comprises adding the crosslinking reagent, and also, where appropriate, the plasticizer, to the polyvinyl butyral, homogenizing the mixture, where appropriate, and thermally crosslinking the same at temperatures in the range from 80 to 280° C.
Dependencies are inferred from the claim text.