Polycarbonate compositions containing a carboxylic acid and their glycerol or diglycerol esters
AssigneeCovestro Deutschland AG
InventorsRolf WEHRMANN, Helmut Werner HEUER, Anke BOUMANS
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Abstract
The invention relates to glass-fibre- and/or carbon-fibre-reinforced polycarbonate compositions having improved flowability coupled with good heat resistance and to articles of manufacture produced from said compositions, in particular those from the thin wall applications sector, for example housing parts for ultrabooks or smartphones. The compositions comprise at least one saturated or unsaturated monocarboxylic acid having a chain length of 6 to 30 carbon atoms and at least one ester of these monocarboxylic acids based on glycerol and/or diglycerol.
Claims15
A composition comprising
- A) 20.0 wt % to 99.45 wt % of aromatic polycarbonate,
- B) 0.50 to 50.0 wt % of glass fibres or carbon fibres,
- C) 0.05 wt % to 10.0 wt % of a mixture comprising at least one saturated or unsaturated monocarboxylic acid having a chain length of 6 to 30 carbon atoms and at least one ester of this monocarboxylic acid based on glycerol and/or diglycerol.
A composition consisting of
- A) 79 wt % to 90 wt % of aromatic polycarbonate,
- B) 8.5 to 20.5 wt % of glass fibres,
- C) 0.2 to 1.0 wt % of a mixture comprising at least one saturated or unsaturated monocarboxylic acid having a chain length of 6 to 30 carbon atoms and at least one ester of the monocarboxylic acid based on glycerol and/or diglycerol,
- D) 0.005 to 0.5 wt % of heat stabilizer and
- E) 0.1 to 3 wt % of further additives.
The composition according to claim 8, wherein oleic acid makes up the largest proportion of free carboxylic acids.
Dependencies are inferred from the claim text.