Partially aromatic moulding compositions and their uses

• US 8,324,297 B2
• Filed: 01/26/2011
• Issued: 12/04/2012
• Est. Priority Date: 01/28/2010
• Status: Active Grant

• Current Assignee: EMS-Patent AG (Emesta Holding AG)
• Original Assignee: EMS-Patent AG (Emesta Holding AG)
• Inventors: Hewel, Manfred, Bayer, Andreas
• Primary Examiner(s): SANDERS, KRIELLION ANTIONETTE
• Application Number:
  US13/014,303
• Publication Number:
  US 20110184099A1
• Time in Patent Office: 678 Days
• Field of Search: 524/413, 524/423, 524/424, 524/425, 524/447, 524/449, 524/51, 524/494, 524/602, 524/607, 524/451, 524/100, 524/126, 524/133, 524/400
• US Class Current: 524/100
• CPC Class Codes: C08G 69/265 from at least two different diamines or at least two different dicarboxylic acids
• CPC Class Codes: C08K 3/013 Fillers, pigments or reinforcing additives
• CPC Class Codes: C08K 3/016 Flame-proofing or flame-retarding additives
• CPC Class Codes: C08K 5/0066 Flame-proofing or flame-retarding additives
• CPC Class Codes: C08K 7/06 Elements
• CPC Class Codes: C08K 7/14 Glass
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 77/06 Polyamides derived from polyamines and polycarboxylic acids C08L77/10 takes precedence

Abstract

Polyamide molding composition, in particular for use for components of electronic and/or electrical components, having the following composition:

• (A) 30-100% by weight of a partially aromatic, partially crystalline copolyamide made up of
  • 100% by weight of diacid fraction composed of:
    • 72.0-98.3% by weight of terephthalic acid (TPA) and/or naphthalenedicarboxylic acid;
    • 28.0-1.7% by weight of isophthalic acid (IPA)
  • and 100% by weight of diamine fraction composed of:
    • 51.0-80.0% by weight of 1,6-hexanediamine (HMDA);
    • 20.0-49.0% by weight of aliphatic, unbranched C9-C12-diamine;
• (B) 0-70% by weight of fillers and reinforcing materials;
• (C) 0-25% by weight of flame retardants;
• (D) 0-5% by weight of additives;
  where the components (A)-(D) add up to 100% by weight.

Claims

1. Polyamide moulding composition having the following composition:

(A) 30-100% by weight of a partially aromatic, partially crystalline copolyamide made up of

100% by weight of diacid fraction composed of;

72.0-98.3% by weight diacid selected from the group of;

terephthalic acid, naphthalenedicarboxylic acid or mixtures thereof;

28.0-1.7% by weight of isophthalic acid;

and 100% by weight of diamine fraction composed of;

51.0-80.0% by weight of 1,6-hexanediamine;

20.0-49.0% by weight of aliphatic, unbranched C9-C12-diamine;

(B) 0-70% by weight of fillers and reinforcing materials;

(C) 0-25% by weight of flame retardants;

(D) 0-5% by weight of additives;

wherein the components (A)-(D) add up to 100% by weight.

2. Polyamide moulding composition according to claim 1, wherein the aliphatic, unbranched C9-C12-diamine is a diamine selected from the group consisting of:

1,9-nonanediamine, 1,10-decanediamine, 1,11-undecanediamine, 1,12-dodecanediamine, or a mixture of such diamines.

3. Polyamide moulding composition according to claim 1, wherein the diamine fraction of the component (A) is composed of

55.0-75.0% by weight of 1,6-hexanediamine;

25.0-45.0% by weight of aliphatic, unbranched C9-C12-diamine.

4. Polyamide moulding composition according to claim 1, wherein the diamine fraction of the component (A) is composed of

55.0-70.0% by weight of 1,6-hexanediamine;

30.0-45.0% by weight of aliphatic, unbranched C9-C12-diamine.

5. Polyamide moulding composition according to claim 1, wherein the diacid fraction of the component (A) is composed of

72.0-98.3% by weight of diacid selected from the group of:

terephthalic acid,

naphthalenedicarboxylic acid or mixtures thereof

and an isophthalic acid content in a % by weight range determined as a function of the content of aliphatic, unbranched C9-C12-diamine in percent of the diamine fraction according to the formula

IPA (% by weight)=(39−

0.7*C9-C12-diamine)

with a range of +/−

5% by weight.

6. Polyamide moulding composition according to claim 1, wherein the proportion of component (B) is in the range 20-65% by weight.

7. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has a solution viscosity measured in m-cresol at 0.5% by weight measured at a temperature of 20°

C. of not more than 2.0.

8. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has a glass transition temperature in the range 110-140°

C.

9. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has an enthalpy of fusion in the range 30-60 J/g.

10. Polyamide moulding composition according to claim 1, wherein the component (A) and/or the entire polyamide moulding composition has a water absorption of less than 5% by weight.

11. Polyamide moulding composition according to claim 1, wherein the fillers and reinforcing materials of the component (B) are fibres.

12. Polyamide moulding composition according to claim 1, wherein the fillers and reinforcing materials of the component (B) are selected from the group of:

particulate fillers, a mixture of fibres and particulate fillers.

13. Polyamide moulding composition according to claim 1, wherein the proportion of component (C) is in the range 8-25% by weight.

14. Polyamide moulding composition according to claim 1, wherein stabilizers, processing aids, inorganic stabilizers, organic stabilizers, lubricants, dyes, nucleating agents, metallic pigments, metal flakes, metal-coated particles, impact modifiers, antistatics, conductivity additives, mould release agents, optical brighteners, natural sheet silicates, synthetic sheet silicates or mixtures of the additives mentioned are present as additives of the component (D).

15. Moulding produced using a polyamide moulding composition according to claim 1.

16. Polyamide moulding composition according to claim 1, wherein the aliphatic, unbranched C9-C12-diamine is a diamine selected from the group consisting of:

1,10-decanediamine and 1,12-dodecanediamine and mixtures thereof.

17. Polyamide moulding composition according to claim 1, wherein the aliphatic, unbranched C9-C12-diamine is 1,10-decanediamine alone.

18. Polyamide moulding composition according to claim 5, wherein isophthalic acid (IPA) content is in a range of +/−

3% by weight of value according to the formula.

19. Polyamide moulding composition according to claim 5, wherein isophthalic acid (IPA) content is in a range of +/−

2% by weight of value according to the formula.

20. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has a solution viscosity measured in m-cresol at 0.5% by weight measured at a temperature of 20°

C. of not more than 1.9.

21. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has a solution viscosity measured in m-cresol at 0.5% by weight measured at a temperature of 20°

C. of 1.8.

22. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has a glass transition temperature in the range 115-135°

.

23. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has a glass transition temperature in the range 120-130°

C.

24. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has a melting point in the range 300-330°

C.

25. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has a melting point in the range 305-325°

C.

26. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has a melting point in the range 310-325°

C.

27. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has an enthalpy of fusion in the range 35-60 J/g.

28. Polyamide moulding composition according to claim 1, wherein the partially aromatic, partially crystalline copolyamide of the component (A) has an enthalpy of fusion in the range 40-60 J/g.

29. Polyamide moulding composition according to claim 1, wherein the component (A) and/or the entire polyamide moulding composition has a water absorption of less than 4% by weight, after 336 hours in water at temperature of 95°

C.

30. Polyamide moulding composition according to claim 1, wherein the component (A) and/or the entire polyamide moulding composition has a water absorption of less than 4% by weight.

31. Polyamide moulding composition according to claim 1, wherein the component (A) and/or the entire polyamide moulding composition has a water absorption of less than 5% by weight after 336 hours in water at temperature of 95°

C.

32. Polyamide moulding composition according to claim 1, wherein the fillers and reinforcing materials of the component (B) are glass fibres and/or carbon fibres.

33. Polyamide moulding composition according to claim 32, wherein the fibres are short fibres, having a length in the range 2-50 mm, or continuous fibres, wherein these fibres have a circular and/or noncircular cross-sectional area.

34. Polyamide moulding composition according to claim 1, wherein the fillers and reinforcing materials of the component (B) are fibres having a noncircular cross-sectional area, with the length ratio of the main cross-sectional axis to the secondary cross-sectional axis being >

2.

35. Polyamide moulding composition according to claim 1, wherein the fillers and reinforcing materials of the component (B) are fibres having a noncircular cross-sectional area, with the length ratio of the main cross-sectional axis to the secondary cross-sectional axis being in the range 2-5.

36. Polyamide moulding composition according to claim 12, wherein the fillers are mineral fillers based on talc, mica, silicate, quartz, titanium dioxide, wollastonite, kaolin, amorphous silicas, magnesium carbonate, magnesium hydroxide, chalk, lime, feldspar, barium sulphate, solid or hollow glass spheres or milled glass, permanently magnetic or magnetizable metal compounds and/or alloys or mixtures as particulate fillers.

37. Polyamide moulding composition according to claim 1, wherein the proportion of component (C) is in the range 10-18% by weight, with the component (C) being composed of 60-100% by weight of a phosphinic acid salt and/or diphosphinic acid salt and 0-40% by weight, of a nitrogen-containing synergist and/or a nitrogen- and/or phosphorus-containing flame retardant.

38. Polyamide moulding composition according to claim 1, wherein the proportion of component (C) is in the range 10-18% by weight, with the component (C) being composed of 80-96% by weight, of a phosphinic acid salt and/or diphosphinic acid salt and 0-40% by weight, and 4-20% by weight, of a nitrogen-containing synergist and/or a nitrogen- and/or phosphorus-containing flame retardant.

39. Polyamide moulding composition according to claim 1, wherein the proportion of component (C) is in the range 10-18% by weight, with the component (C) being composed of 80-96% by weight, of a phosphinic acid salt and/or diphosphinic acid salt and 0-40% by weight, and 4-20% by weight, of a nitrogen-containing synergist and/or a nitrogen- and/or phosphorus-containing flame retardant, with the latter being selected from among melamine or condensation products of melamine, in particular melem, melam, melon, or reaction products of melamine with polyphosphoric acid or reaction products of condensation products of melamine with polyphosphoric acid or mixtures thereof.

40. Polyamide moulding composition according to claim 1, wherein the additives of the component (D), are carbon black and/or carbon nanotubes as antistatics.

41. Moulding produced using a polyamide moulding composition according to claim 1, in the form of an electrical or electronic component, a printed circuit board, a part of a printed circuit board, a housing component, a film, a conduit, in particular in the form of a switch, a distributor, a relay, a resistance, a capacitor, a coil, a lamp, a diode, an LED, a transistor, a connector, a regulator, a storage and/or a sensor.