Polyamide blend molding compound
Polyamide blend molding compound, includes a polyamide blend content and at least one impact-resistant component, characterized in that the polyamide blend content includes the following polyamides: (A) 20 to 65% by weight of at least one semi-crystalline polyamide with an enthalpy of fusion >40 J/g and with an average of at least 8 C atoms per monomeric unit; (B) 8 to 25% by weight of at least one amorphous and/or microcrystalline polyamide, with the microcrystalline polyamide having an enthalpy of fusion in the range of 4 to 40 J/g, and (C) 1 to 20% by weight of at least one polyamide with an average of a maximum of 6 C atoms per monomeric unit. The impact-resistant component includes as follows: (D) 10 to 40% by weight of a polyamide elastomer which is composed of hard segments and soft segments, with the hard segments being based on lactams and/or amino-carboxylic acids, and (E) 0 to 35% by weight of a non-polyamide elastomer.
1. A polyamide blend molding compound, comprising a polyamide blend content and at least one impact-resistant component, wherein
the polyamide blend content comprises the following polyamides:
(A) 25 to 50% by weight of at least one semi-crystalline polyamide with an enthalpy of fusion >40 J/g and with an average of at least 8 C atoms per monomeric unit selected from the group consisting of PA 610, PA 612, PA 1010, PA 106, PA 106/10T, PA 614 and PA 618;
(B) 10 to 20% by weight of at least one amorphous and/or microcrystalline polyamide, with the microcrystalline polyamide having an enthalpy of fusion in the range of 4 to 40 J/g, and
(C) 5 to 10% by weight of at least a third polyamide with an average of a maximum of 6 C atoms per monomeric unit and an enthalpy of fusion >40 J/g; and
the impact-resistant component comprises:
(D) 10 to 40% by weight of a polyamide elastomer comprising hard segments and soft segments, with the hard segments being based on lactams and/or amino-carboxylic acids, and (E) 0 to 35% by weight of a non-polyamide elastomer,
and wherein the weight percent of (A)-(E), respectively, relate to the total weight of the polyamide blend molding compound.
2. The polyamide blend molding compound according to claim 1 , wherein the microcrystalline polyamide of component (B) has an enthalpy of fusion in the range of 4 to 25 J/g.
3. The polyamide blend molding compound according to claim 1 , wherein the polyamide elastomer of component (D) is selected from the group consisting of polyether amides, polyester ether amides and polyester amides.
4. The polyamide blend molding compound according to claim 1 , wherein the at least one amorphous and/or microcrystalline polyamide of component (B) is selected from the group consisting of PA MACMI/MACMT/12; PA MACMI/12; PA PACM12; PA 6I/6T; PA TMDT; PA NDT/INDT; PA 6I/MACMI/MACMT; PA 6I/6T/MACMI; PA MACM12/PACM12; PA MACMI/MACM36; PA 6I; PA 12/PACMI; PA 12/MACMI; PA 12/MACMT; PA 6I/PACMT; PA 6/6I; PA 6/IPDT; PA MACM12; PA MACM18; PA PACM12; PA MACM12/PACM12; PA MACM18/PACM18; PA 6I /PACMI/PACMT; PA 6I/MXDI; and combinations of two or more thereof.
5. The polyamide blend molding compound according to claim 4 , wherein the polyamide PA MACMI/MACMT/12 is formed by:
30 to 45 parts by weight of MACMI;
30 to 45 parts by weight of MACMT, and
10 to 40 parts by weight of LC12.
6. The polyamide blend molding compound according to claim 1 , wherein the at least third polyamide of component (C) having an average of a maximum of 6 C atoms per monomeric unit is selected from the group consisting of the polyamides PA 6, PA 46 and PA 66.
7. The polyamide blend molding compound according to claim 1 , wherein the polyamide blend content comprises the following polyamides:
(A) 25 to 50% by weight of PA 610;
(B) 10 to 20% by weight of PA MACMI/MACMT/12, and
(C) 5 to 10% by weight of PA 6,
and wherein the weight percent of (A), (B), and (C), respectively, relate to the total weight of the polyamide blend molding compound.
8. The polyamide blend molding compound according to claim 1 , wherein the polyamide elastomer of component (D) with hard segments on the basis of lactam and/or amino-carboxylic acid is selected from the group consisting of polyether amides, polyester ether amides and polyester amides, with the polyamide elastomer comprising hard blocks made of PA 6, PA 11 or PA 12 segments.
9. The polyamide blend molding compound according to claim 1 , wherein the non-polyamide elastomer of component (E) is selected from the group consisting of ethylene-α-olefin-copolymers, ethylene-C 3-12 -α-olefin-copolymers and ethylene-C 3-12 -α-olefin with an unconjugated diene, NBR and acrylate.
10. The polyamide blend molding compound according to claim 9 , wherein the ethylene-α-olefin-copolymer is an EP elastomer and/or EPDM elastomer, with the olefin of the ethylene-C 3-12 -α-olefin-copolymer being chosen from the group of propene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene and/or 1-dodecene, and with the unconjugated diene being chosen from the group of bicyclo(2.2.1)heptadiene, hexadiene-1.4, dicyclopentadiene and 5-ethylidene norbornene.
11. The polyamide blend molding compound according to claim 9 , wherein the ethylene-α-olefin-copolymers are a mixture of ethylene-propylene- copolymer and ethylene-butylene copolymer grafted with maleic acid anhydride.
12. The polyamide blend molding compound according to claim 1 , wherein a filler is admixed to the blend which is selected from the group consisting of fibers and organically modified layered silicates, with the fibers being glass fibers, with glass fibers being mixed into the polyamide blend molding compound up to 20% by weight and with the organically modified layered silicates being selected from the group consisting of mica, smektites and vermiculite, with organically modified layered silicates being mixed into the polyamide blend molding compound up to 15% by weight.
13. A method of producing a polyamide blend molding compound according to claim 1 , wherein each polyamide of the components (A,B,C) of the polyamide blend content and the polyamide elastomer of the impact-resistant component (D) is produced in a classic polymerization autoclave at a total pressure which is 300 mbar or higher.
14. A molded part, made of a polyamide blend molding compound, according to claim 1 , wherein the molded part has a modulus of elasticity of not more than 1400 MPa at a temperature of −30 ° C.
15. A molded part, made of a polyamide blend molding compound, according to claim 1 , wherein the molded part has a modulus of elasticity of not more than 2400 MPa at a temperature of −40 ° C.
16. A molded part, made of a polyamide blend molding compound, according to claim 1 , wherein the molded part has a modulus of elasticity of at least 50 MPa at a temperature of +180 ° C.
17. The molded part according to claim 14 , which is a pipe which is selected from the group consisting of a line in or on a motor vehicle and a line in or on an immobile structure.
18. The line in or on a motor vehicle according to claim 17 , comprising a brake booster line, a cooling-water line, an air-intake line, a heating line, a venting line, a hydraulic line, or a pneumatic brake line.
19. The line in or on an immobile structure according to claim 17 , comprising a waste-water line, a rainwater line, a pneumatic-post line, a heating-oil line, a long-distance heating line, a cold-water line, a hot-water line, a drinking-water line, or a protective pipe for an electric line.
20. The molded part according to claim 14 , comprising an injection-molded brake booster, fuel filter or air filter component.
21. The polyamide blend molding compound of claim 1 , further comprising conventional additives.
22. The polyamide blend molding compound of claim 1 , wherein (A)-(E) together with optionally added conventional additives represent 100% by weight of the polyamide blend molding compound.
23. The molded part according to claim 15 , having a modulus of elasticity of not more than 2000 MPa at a temperature of −40° C.
24. The molded part according to claim 15 , having a modulus of elasticity of not more than 1950 MPa at a temperature of −40 ° C.
25. The molded part according to claim 16 , having a modulus of elasticity of at least 75 MPa at a temperature of +180 ° C.
26. The molded part according to claim 17 , comprising a single-layer extruded pipe.
27. The single-layer extruded pipe according to claim 26 , which is a vacuum brake booster line.
28. The molded part according to claim 14 , having a modulus of elasticity of at least 50 MPa at a temperature of +180° C.