Polycarbonates containing aspartic acid-ester functional silicones
AssigneeBayer Aktiengesellschaft
InventorsBurkhard Köhler, Klaus Horn
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Abstract
Aspartate-functional silicone and the process for its preparation is disclosed. Also disclosed are aromatic polycarbonate that contains the inventive aspartate-functional silicone, a process for its preparation and its use in making molded articles.
Claims10
Aromatic polycarbonates containing 1 to 30 wt. % aspartate functional silicones.
A process for producing aromatic polycarbonates containing aspartate-functional silicones, characterised in that bisphenols and aspartate-functional silicones are caused to react with derivatives of carbonic acid in the presence of chain-terminators and/or branching agents, or aromatic polycarbonates are caused to react with aspartate-functional silicones in solution or in a melt.
Polycarbonate, obtained by conversion of bisphenols, aspartate-functional silicones and derivatives of carbonic acid by the phase interface process.
Polycarbonate, obtained by reaction of aromatic polycarbonates with aspartate-functional silicones in solution or in a melt.
A process for producing polycarbonate comprising
- a) adding fumarate and/or maleates of the formula (I)
- ROOC—CH═CH—COOR
- where
- R stands for a C1-C4 alkyl or alkenyl residue onto amino-functionalized silicones to produce an aspartate-functionalized silicone, and
- b) reacting the aspartate-functional silicone with a bisphenol and a derivative of carbonic acid.
Dependencies are inferred from the claim text.