Polyamide moulding compound and moulded articles producible therefrom

1. A polyamide moulding compound consisting of

(a) 54 to 79.7% by weight, relative to the sum of components (a) to (d) of a mixture of an amorphous or microcrystalline polyamide and a partially crystalline polyamide,

(b) 10 to 30% by weight, relative to the sum of components (a) to (d), of at least one impact modifier having a density of at most 0.915 g/cm 3 ,

(c) 5 to 20% by weight, relative to the sum of components (a) to (d), of hollow glass balls having a pressure resistance of at least 100 MPa measured according to ASTM D 3102-72 in glycerine, and

(d) 0 to 15% by weight, relative to the sum of components (a) to (d), of further additives,

components (a) to (d) adding up to 100% by weight;

wherein the polyamide moulding compound has (i) a density of at most 0.945 g/cm 3 , (ii) a tensile strength of 22 to 56 MPa and a breaking elongation of 4 to 160%, according to ISO 527, and (iii) a Charpy Impact Strength of 33 to 115 kJ/m 2 according to ISO 179;

wherein component (a) is a mixture of PA 12 and PA MACM12;

wherein component (b) is selected from the group consisting of styrene-ethylene/butylene-styrene block copolymer grafted with maleic anhydride, ethylene-1-butene copolymer grafted with maleic anhydride, a blend of ethylene-propylene copolymer and ethylene-but-1-ene copolymer wherein one or both copolymers of said blend is/are grafted with maleic anhydride, and combinations thereof;

and

wherein the additives are selected from the group consisting of inorganic stabilisers, organic stabilisers, antiozonants, light-protecting means, UV stabilisers, UV absorbers or UV blockers, IR absorbers, NIR absorbers, anti-blocking agents, nucleation agents, crystallisation accelerators, crystallisation retardants, condensation catalysts, chain regulators, defoamers, chain-lengthening additives, conductivity additives, separation means, lubricants, marking agents, organic pigments, carbon black, graphite, carbon nanotubes, graphene, carbon fibres, photochromic agents, anti-static agents, mould-release agents, optical brighteners, halogen-free flame retardants, metallic flakes, metal-coated particles, filling- and reinforcing materials, natural layer silicates, synthetic layer silicates, and mixtures thereof.

2. The polyamide moulding compound according to claim 1 , wherein component (a) has a density of at most 1.220 g/cm 3 .

3. The polyamide moulding compound according to claim 1 wherein the amount of component (a) in the moulding compound ranges from 57 to 79% by weight relative to the sum of components (a) to (d).

4. The polyamide moulding compound according to claim 1 , wherein the at least one impact modifier has a density of at most 0.910 g/cm 3 .

5. The polyamide moulding compound according to claim 1 wherein the amount of the hollow glass balls (c) in the moulding compound ranges from 10 to 20% by weight relative to the sum of components (a) to (d).

6. The polyamide moulding compound according to claim 1 , wherein the hollow glass balls have a pressure resistance of at least 110 MPa.

7. A moulded article or a coated moulded article comprising a polyamide moulding compound according to claim 1 .

8. The moulded article of claim 7 , which is selected from foils, profiles, pipes, containers, semi-finished products, finished parts, and hollow articles.

9. The polyamide moulding compound according to claim 1 , wherein component (a) has a density of 1.01 to 1.06 g/cm 3 .

10. The polyamide moulding compound according to claim 9 , wherein the hollow glass balls have a pressure resistance of at least 110 MPa.