PET BASED POLYMERIC MATRIX FOR ELECTRIC WIRES

Abstract

A polymeric matrix including: 50 to 80%, preferably 64 to 73% PET; 18 to 50%, preferably 20 to 28% of a mixture of polyolefins; 0.1 to 15%, preferably 0.5 to 7% of at least one flame-retardant additive; 0 to 2%, preferably 0.2 to 1% of at least one antioxidant; 0 to 2% preferably 0.2 to 1% of at least one crosslinking promoter; 0 to 2%, preferably 0.2 to 1% of at least one anti-hydrolysis agent, the percentages being by weight of the total weight of the matrix. Also, the use of polymeric matrix in manufacturing electrical cables.

Claims

1.-13. (canceled)

14. A polymeric matrix comprising: 50 to 80% PET; 18 to 50% of a mixture of polyolefins; 0.1 to 15% of at least one flame-retardant additive; 0 to 2% of at least one antioxidant; 0 to 2% of at least one crosslinking promoter; 0 to 2% of at least one anti-hydrolysis agent, wherein the PET is mostly recycled PET, and the percentages being by weight of the total weight of the matrix.

15. The polymeric matrix according to claim 14, wherein in that the PET is recycled.

16. The polymeric matrix according to claim 14, wherein the recycled PET comes from food packaging.

17. The polymeric matrix according to claim 14, wherein the mixture of polyolefins comprises at least one polar polyolefin, wherein the polar polyolefin is selected in the group consisting of polar polymers containing polymerized groups, and mixtures thereof.

18. The polymeric matrix according to claim 14, further comprising in a minority amount compared to the mixture of polyolefins at least one nonpolar polyolefin selected in a group consisting of polypropylene, polyethylene, methylpentene, polybutylene, ethylene propylene diene, and mixtures thereof.

19. The polymeric matrix according to claim 14, wherein the flame-retardant additive is selected from the group consisting of bromine, antimony, a brominated compound, an antimony compound or mixtures thereof.

20. The polymeric matrix according to claim 14, wherein the antioxidant is selected from the group consisting of pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), 2′,3-bis[3-[3,5-di-tert-butyl-4-hydroxyphenyl[propioyl] propionohydrazide, dioctadecyl 3,3′-thiodipropionate, or a mixture thereof.

21. The polymeric matrix according to claim 14, containing a crosslinking promoter.

22. The polymeric matrix according to claim 14, wherein the polymeric matrix does not have a plasticizer.

23. A method for manufacturing insulators for electrical conductor wires using the polymeric matrix as defined in claim 14.

24. A cable comprising at least one electrical conductor wire covered by a protective sleeve based on the polymeric matrix defined in claim 14.

25. A method for the automotive cabling using the cable as defined in claim 24.

26. A method for preparation of a cable according to claim 24 comprising: preparing the polymeric matrix; extruding the matrix around an electrical conductor; and possibly crosslinking of the polymeric matrix.

27. A polymeric matrix comprising: 64 to 73%, PET; 20 to 28% of a mixture of polyolefins; 0.5 to 7% of at least one flame-retardant additive; 0.2 to 1% of at least one antioxidant; 0.2 to 1% of at least one crosslinking promoter; and 0.2 to 1% of at least one anti-hydrolysis agent, wherein the PET is mostly recycled PET, and the percentages being by weight of the total weight of the matrix.

28. The polymeric matrix according to claim 17, wherein the mixture of polyolefins comprises polar polymers containing polymerized groups or grafted groups selected in the group consisting of maleic anhydride; glycidyl methacrylate; methyl, ethyl, butyl and hexyl acrylates; acrylic acid and salts thereof; vinyl acetate; ethylene/methyl acrylate copolymer; ethylene/butyl acrylate copolymer; ethylene/methyl acrylate/glycidyl methacrylate terpolymer; and mixtures thereof.

29. The polymeric matrix according to claim 14, wherein the flame-retardant additive is antimony trioxide.

30. The polymeric matrix according to claim 14, wherein the flame-retardant additive is decabromodiphenyl ethane.

31. The polymeric matrix according to claim 14, wherein the flame-retardant additive is antimony trioxide. and decabromodiphenyl ethane.

32. The polymeric matrix according to claim 14, containing 1,3,5-triallylisocyanurate or trimethylolpropane trimethylacrylate as a crosslinking promoter.

Description

EXAMPLES

[0063] Different cables according to the invention have been prepared by extrusion of a polymeric matrix according to the invention around a strand of copper with 0.13 mm.sup.2 section and 0.407 mm diameter.

[0064] The cables underwent tests listed in Table 1.

[0065] The compositions of the polymeric matrix constituting the tested sleeves are given in the following examples 1 to 6.

[0066] In the examples, the following commercial products were used:

[0067] ECOPET CB TH 80: Recycled PET sold by Paprec

[0068] ECOFLAKES CB TH: PET in flakes sold by Paprec

[0069] ECOPET CB: PET in amorphous pellets sold by Paprec

[0070] Irganox 1024: antioxidant sold by BASF

[0071] Irganox 1010: antioxidant sold by BASF.

Example 1

[0072] The cable was prepared by extrusion of a polymeric matrix with the following composition around a copper strand: [0073] 64.46% by weight of ECOFLAKES CB TH, [0074] 23.02% by weight of ethylene methyl acrylate copolymer (having a methyl acrylate content of 24% by weight), [0075] 4.60% by weight of ethylene/methyl acrylate/glycidyl methacrylate terpolymer (67/25/8), [0076] 2.30% by weight of antimony trioxide, [0077] 4.60% by weight of decabromodiphenylethane, [0078] 0.09% by weight of Irganox 1024, [0079] 0.09% by weight of Irganox 1010, [0080] 0.46% by weight of dioctadecyl 3,3′-thiodipropionate.

[0081] The extrusion was done so as to get the sleeve (coming from the polymeric matrix) thickness indicated in Table 1. This thickness is expressed as the outer diameter of the cable.

[0082] The following characteristics are measured on the cable according to the ISO 6722-1-2011 (E) standard: [0083] flame propagation resistance; [0084] abrasion resistance at 4N; [0085] rupture under elongation according to the NF EN 60811-501 standard; [0086] pressure resistance at high temperature; [0087] resistance to hydrolysis and electrolysis; [0088] low temperature winding; [0089] thermal aging at 125° C. for 3000 hours.

[0090] The results of these tests are presented in Table 1 with the specific conditions and/or target values in the first column.

Example 2

[0091] In the same way as in example 1, a cable resulting by extrusion of a polymeric matrix having the following composition was prepared: [0092] 64.46% by weight of ECOPET CB TH, [0093] 23.02% by weight of ethylene methyl acrylate copolymer (having a methyl acrylate content of 24% by weight); [0094] 4.60% by weight of ethylene/methyl acrylate/glycidyl methacrylate terpolymer (67/25/8), [0095] 2.30% by weight of antimony trioxide, [0096] 4.60% by weight of decabromodiphenylethane, [0097] 0.09% by weight of Irganox 1024, [0098] 0.46% by weight of Irganox 1010, [0099] 0.46% by weight of dioctadecyl 3,3′-thiodipropionate.

[0100] The extrusion was done so as to get the sleeve thickness (coming from the polymeric matrix) indicated in Table 1. This thickness is expressed as the outer diameter of the cable.

[0101] The same properties as in Example 1 were measured on the cable.

[0102] The values obtained are gathered in Table 1.

Example 3

[0103] In the same way as an example 1, a cable was prepared by extrusion of a polymeric matrix having the following composition: [0104] 64.46% by weight of ECOPET CB, [0105] 23.02% by weight of ethylene methyl acrylate (24%) copolymer, [0106] 4.60% by weight of ethylene/methyl acrylate/glycidyl methacrylate terpolymer (67/25/8), [0107] 2.30% by weight of antimony trioxide, [0108] 4.60% by weight of decabromodiphenylethane, [0109] 0.09% by weight of Irganox 1024, [0110] 0.469% by weight of Irganox 1010, [0111] 0.46% by weight of dioctadecyl 3,3′-thiodipropionate.

[0112] The extrusion was done so as to get the sleeve thickness (coming from the polymeric matrix) indicated in Table 1. This thickness is expressed as the outer diameter of the cable.

[0113] The same properties as in Example 1 were measured on the cable.

[0114] The resulting values are gathered in Table 1.

Example 4

[0115] In the same way as an example 1, a cable was prepared from extrusion of a polymeric matrix having the following composition: [0116] 73.66% by weight of ECOFLAKES CB TH, [0117] 13.81% by weight of ethylene methyl acrylate copolymer (having a methyl acrylate content of 24% by weight), [0118] 4.60% by weight of ethylene/methyl acrylate/glycidyl methacrylate terpolymer (67/25/8), [0119] 2.30% by weight of antimony trioxide, [0120] 4.60% by weight of decabromodiphenylethane, [0121] 0.09% by weight of Irganox 1024, [0122] 0.46% by weight of Irganox 1010, [0123] 0.46% by weight of dioctadecyl 3,3′-thiodipropionate.

[0124] The extrusion was done so as to get the sleeve thickness (coming from the polymeric matrix) indicated in Table 1. This thickness is expressed as the outer diameter of the cable.

[0125] The same properties as in Example 1 were measured on the cable.

[0126] The resulting values are gathered in Table 1.

Example 5

[0127] The cable was prepared by extrusion of a polymeric matrix with the following composition around a copper strand: [0128] 73.66% by weight of ECOPET CB TH, [0129] 13.81% by weight of ethylene methyl acrylate (24%) copolymer, [0130] 4.60% by weight of ethylene/methyl acrylate/glycidyl methacrylate terpolymer (67/25/8), [0131] 2.30% by weight of antimony trioxide, [0132] 4.60% by weight of decabromodiphenylethane, [0133] 0.09% by weight of Irganox 1024, [0134] 0.46% by weight of Irganox 1010, [0135] 0.46% by weight of dioctadecyl 3,3′-thiodipropionate.

[0136] The extrusion was done so as to get the sleeve (coming from the polymeric matrix) thickness indicated in Table 1. This thickness is expressed as the outer diameter of the cable.

[0137] The same properties as in Example 1 were measured on the cable.

[0138] The resulting values are gathered in Table 1.

Example 6

[0139] The cable was prepared by extrusion of a polymeric matrix with the following composition around a copper strand: [0140] 73.66% by weight of ECOPET CB, [0141] 13.81% by weight of ethylene methyl acrylate (24%) copolymer, [0142] 4.60% by weight of ethylene/methyl acrylate/glycidyl methacrylate terpolymer (67/25/8), [0143] 2.30% by weight of antimony trioxide, [0144] 4.60% by weight of decabromodiphenylethane, [0145] 0.09% by weight of Irganox 1024, [0146] 0.46% by weight of Irganox 1010, [0147] 0.46% by weight of dioctadecyl 3,3′-thiodipropionate.

[0148] The extrusion was done so as to get the sleeve thickness (coming from the polymeric matrix) indicated in Table 1. This thickness is expressed as the outer diameter of the cable.

[0149] The same properties as in Example 1 were measured on the cable. The resulting values are gathered in Table 1.

TABLE-US-00001 TABLE 1 Examples 1 2 3 4 5 6 Outer diameter in mm 0.90 0.91 0.905 0.90 0.90 0.90 Fire Flame application = 3 OK OK OK OK OK OK seconds (melting of core > 4 seconds) Average combustion 1.84 s/1.12 s 6.04 s/2.46 s 2 s/1.14 s 2.46 s/1.3 s 3.96 s/3.08 s 4.48 s/2 s time (<30 seconds) upper/lower in seconds Average burn length 27/17 41/23 32/17 30/16 33/19 32/19 R1 (upper)/R2 (lower) in mm (<100 mm) Abrasion ≥ 125 cycles with 205 549 221 706 1432 1374 4 N (210 g) weight Elongation at rupture 281% 333% 337% 353% 352% 358% Pressure at high temperature OK OK OK OK OK OK oven for 4 hours at 131° C. voltage of 1 kV/1 minute + 4 hours in saline solution Hydrolysis and electrolysis OK OK OK OK OK OK submerged 35 days > 1000 MΩ .Math. mm in a saline solution Winding at −40° C. visual OK OK OK OK OK OK inspection 5 × Ø of the wire submersion 10 min + 1 kVdc/1 min Aging > 3000 hours at 125° C. OK OK OK OK OK OK 1.5 × Ø of the wire Winding at ambient temperature (after 16 hours of rest) submersion for 10 minutes in saline solution