MOULDING COMPOSITIONS REINFORCED WITH GLASS FIBRES HAVING IMPROVED IMPACT PROPERTIES

摘要

The present invention relates to a composition, in particular for use in injection moulding, comprising: (A) from 29 to 74%, and more particularly 34 to 64%, in particular from 44 to 54% by weight of at least one semi-crystalline aliphatic polyamide, the semi-crystalline aliphatic polyamide being obtained from the polycondensation: of at least one C 6 to C 18, preferably C 9 to C 18, more preferably C 10 to C 18, even more preferably C 10 to C 12, in particular C 11 amino acid; or at least one C 6 to C 18, preferably C 9 to C 18, more preferably C 10 to C 18, even more preferably C 10 to C 12, in particular C 12 lactam; or at least one C 4 to C 36, in particular C 6 to C 36, preferably C 6 to C 18, preferably C 6 to C 12, more preferably C 10 to C 12 diamine Ca with at least one C 4 to C 36, in particular C 6 to C 36, preferably C 6 to C 18, preferably C 10 to C 18, more preferably C 10 to C 12 diacid Cb; (B) from 25 to 70%, and more particularly 35 to 65%, in particular 45 to 55% by weight of glass fibres mainly consisting of silica dioxide (SiO2), aluminium oxide (Al203) and magnesium oxide (MgO); the glass fibres (B) consisting of the following composition: from 62 to 66% by weight of SiO2; (C) from 1 to 20% by weight of at least one impact modifier; and (D) from 0 to 2%, preferably 1 to 2%, by weight of at least one additive, excluding copper chromite, zinc sulphide, titanium dioxide, calcium carbonate and a polyolefin-based coloured masterbatch; the sum of the various constituents (A) to (D) being 100% by weight.