Fibre reinforced polyamide moulding compounds

Polyamide moulding blends comprising

• (1) polyamide,
• (2) 10 to 60% by weight of fibres, glass pellets, or mixtures thereof
• (3) 0 to 20% by weight of other usual additives and
• (4) 1 to 30% by weight of graft products consisting of
• (a) 70 to 99% by weight of a homopolymer of aliphatic and/or aromatic monoolefines or mixtures thereof or a copolymer of these olefines, up to 50% by weight of other monoolefinically unsaturated compounds capable of radical polymerisation and/or up to 5% by weight of diolefines or mixtures thereof as graft substrate and
• (b) 1 to 30% by weight of grafted units of
• (.alpha.) 0 to 100% by weight of .alpha.,.beta.-unsaturated acids corresponding to the general formula ##STR2## in which R.sub.1, R.sub.2 and R.sub.3 which may be the same or different represent hydrogen, a C.sub.1 to C.sub.5 alkyl group, a C.sub.6 to C.sub.12 aryl group or a C.sub.7 to C.sub.13 alkylaryl group;
• (.beta.) 0 to 100% by weight of esters of the unsaturated acid of formula (I) having 1 to 8 carbon atoms in the alcohol moiety,
• (.gamma.) 0 to 30% by weight of acrylamide and/or
• (.delta.) 0 to 30% by weight of acrylonitrile or styrene, or mixtures thereof
• wherein the sum of 1, to 4, and of a, to b and of .alpha., to .delta., must in each case be 100% by weight, characterised in that the graft products have a peroxide graft (as OOH) of 0 to 5000 ppm and have been prepared by bringing the molten graft substrate (a) into contact with oxygen or oxygen-containing gases for a maximum of 10 minutes under conditions of vigorous mixing at a pressure of 1 to 150 bar and a temperature of 80.degree. to 300.degree. C., the monomers (b) which are to be grafted on the graft substrate are added immediately thereafter under conditions of vigorous mixing under pressure with exclusion of oxygen or oxygen-containing gases, and the residual monomers are removed after graft polymerisation.