Reinforced polyamide moulding materials
First Claim
1. High rigid and simultaneously tough, reinforced polyamide moulding material, characterized by:
- heat distortion temperature values HDT/A (1.8 MPa) (measured according to ISO
75) of more than 242°
C., optionally at least 245°
C., HDT/C (8 MPa) of more than 150°
C., optionally more than 170°
C., and a polyamide matrix containing a blend of the following components;
(A) polyamide 66, (B) copolyamide, composed of (b1) 50 to 80 parts by weight of units, optionally 50 to 70 parts by weight of units, which are derived from terephthalic acid (T) in combination with hexamethylenediamine (6) in approximately equimolar ratio, (b2) 50 to 20 parts by weight of units, in optionally 50 to 30 parts by weight of units, which are derived from isophthalic acid (I) in combination with hexamethylenediamine in approximately equimolar ratio, the parts by weight of the components (b1) and (b2) together giving 100 parts by weight, and a filler component containing a mixture of;
(C) glass fibres and (D) carbon fibres, the percentages by weight of the components (A) to (D) together giving 100% and the components (A), (B), (C), and (D) fulfilling the following conditions;
(A)+(B);
20 to 60% by weight, weight ratio (A)/(B);
50/50 to 95/5, (C)+(D);
40 to 80% by weight, weight ratio (C)/(D);
80/20 to 95/5, the polyamide moulding material optionally containing at least one additive (E) in addition to the components (A) to (D), and the amount thereof being additive to the sum of the components (A) to (D).
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Abstract
The present invention relates to reinforced polyamide moulding materials which can be prepared from a polyamide blend and, for example, by compounding with cut fibres or continuous filaments on twin-screw extruders and have mechanical properties which are usually not compatible with one another, namely a combination of exceptionally high rigidity and strength and at the same time good toughness. Furthermore, a high heat distortion temperature (HDT) is achieved according to the invention. The thermoplastic polyamide moulding materials according to the invention are suitable for the production of mouldings or other semifinished products or finished articles, which can be produced, for example, by extrusion, injection moulding, direct methods or direct compounding, in which the compounded polyamide moulding material is processed directly by injection moulding, or other deformation techniques.
34 Citations
18 Claims
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1. High rigid and simultaneously tough, reinforced polyamide moulding material, characterized by:
- heat distortion temperature values HDT/A (1.8 MPa) (measured according to ISO
75) of more than 242°
C., optionally at least 245°
C., HDT/C (8 MPa) of more than 150°
C., optionally more than 170°
C., and a polyamide matrix containing a blend of the following components;
(A) polyamide 66, (B) copolyamide, composed of (b1) 50 to 80 parts by weight of units, optionally 50 to 70 parts by weight of units, which are derived from terephthalic acid (T) in combination with hexamethylenediamine (6) in approximately equimolar ratio, (b2) 50 to 20 parts by weight of units, in optionally 50 to 30 parts by weight of units, which are derived from isophthalic acid (I) in combination with hexamethylenediamine in approximately equimolar ratio, the parts by weight of the components (b1) and (b2) together giving 100 parts by weight, and a filler component containing a mixture of;
(C) glass fibres and (D) carbon fibres, the percentages by weight of the components (A) to (D) together giving 100% and the components (A), (B), (C), and (D) fulfilling the following conditions;
(A)+(B);
20 to 60% by weight,weight ratio (A)/(B);
50/50 to 95/5,(C)+(D);
40 to 80% by weight,weight ratio (C)/(D);
80/20 to 95/5,the polyamide moulding material optionally containing at least one additive (E) in addition to the components (A) to (D), and the amount thereof being additive to the sum of the components (A) to (D). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- heat distortion temperature values HDT/A (1.8 MPa) (measured according to ISO
Specification