A glass fibre-reinforced polypropylene composition which comprises… 100 parts by weight of a mixture consisting of 95 to 55 parts by weight of a graft polypropylene resin obtainable by graft-polymerising a radically-polymerisable unsaturated compound on to a crystalline polypropylene in a hydrocarbon solvent, in the presence of an organic peroxide catalyst, optionally together with a crystalline polypropylene, and 5 to 45 parts by weight of glass fibres treated with an organic silane compound or an organic titanium compound;… 0.005 to 0.05 parts by weight of calcium stearate; and… 0,01 to 0.07 part by weight of a member selected from alkaline earth metal oxides, hydroxides, basic salts and basic complex salts.
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