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Polyamide and polyolefine refractory composition

A composition and polyolefin technology, applied in the field of halogen-free flame-retardant compositions, polyamide-based and polyolefin-based flame-retardant compositions, can solve insufficient thermal stability, loss of elongation at break, loss of material ductility And other issues

Inactive Publication Date: 2004-01-21
ATOFINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the fire resistance properties of state-of-the-art compositions are usually achieved at the expense of the ductility of the material (severe loss of elongation at break, brittleness when subjected to impact at room temperature)
And we have shown that the thermal stability of these materials is not enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0156] The composition according to the invention can be prepared by "direct" blending of all ingredients (A, B, flame retardant, phosphorous plasticizer, zeolite) or by blending flame retardant, phosphorous plasticizer Plasticizers and zeolites were added to the already prepared A / B blends.

[0157] Preference is given to using standard blending and mixing machinery in the thermoplastics industry such as extruders and mixers, eg Buss-Co-Kneaders. In the second method (called the "reprocessing" method), the four ingredients (A+B, flame retardant, phosphorus-containing plasticizer, and zeolite) are either dry blended and placed in the feed hopper, or Flame retardants and phosphorus-containing plasticizers blended with zeolites were added to the pre-melted A / B blend via a bypass feed.

[0158] It is recommended that the formulation of the compositions according to the invention and their processing be carried out under conditions of temperature and shear as mild as possible. T...

Embodiment

[0160] Products used

[0161] Orgalloy_LE6000 : PA-6 / LLDPE alloy, MFI is 2 (235°C / 2.16kg), produced by Atofina.

[0162] PA-6 B3 : PA-6 with an MFI of 17 to 23 (235°C / 2.16kg), produced by BASF, the product name is ULTRAMID B3_.

[0163] PA-6 B4 : PA-6 with MFI of 1.5 to 3 (235°C / 2.16kg), produced by BASF, the product name is ULTRAMID B4_.

[0164] LL 7209 AA : The density is 0.920g / cm 3 The LLDPE with an MFI of 1 (190° C. / 2.16 kg) is produced by BP chemicals and has a trade name of INNOVEX_LL 7209 AA.

[0165] EVA 2403 : An ethylene / vinyl acetate copolymer containing 24% by weight of acetate and having an MFI of 3 (190° C. / 2.16 kg), sold by Atofina under the tradename EVATANE 2403.

[0166] LOTADER_3210 : An ethylene / butyl acrylate / maleic anhydride terpolymer with an MFI of 5 (190° C. / 2.16 kg), containing 6 wt. % acrylate and 3 wt. % maleic anhydride, sold by Atofina.

[0167] LOTADER_4700 : An ethylene / ethyl acrylate / maleic anhydride terpolymer with an MFI of...

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Abstract

The present invention relates to fire-retarded compositions comprising, by weight, the total being 100 parts: 50 to 75 parts of a blend of a polyamide (A) and a polyolefin (B), 25 to 50 parts of a blend comprising: 0.1 to 48.8 parts of a fire retardant, 0.1 to 30 parts of a phosphorus-containing plasticizer, 0.1 to 10 parts of a zeolite, the total of these three products being between 25 and 50. These compositions have a V0 or V1 classification according to the UL94-VB test when a fire test is carried out on test specimens 1.6 mm in thickness. They have many advantages, in particular the elongation at break measured according to ISO R 527-1B exceeds 100%. As regards the impact strength, they have a non-brittle behaviour in multiaxial impact at room temperature according to ISO 6603-2 (at a rate of 7.7 m / s). They retain at least 50% of their mechanical properties after ageing for seven days at 120 DEG C. in hot air. These compositions are useful for insulating and protecting electrical cables and optical fibres and for moulding electrical cases and connectors.

Description

[technical field] [0001] The present invention relates to polyamide-based and polyolefin-based flame retardant compositions, in particular polyamide-based and polyolefin-based thermoplastic compositions containing a flame retardant, a phosphorus-containing plasticizer and a zeolite. These compositions can be used for insulation and protection of cables and optical fibers, and for molded electrical boxes and connectors. [0002] Thermoplastic polymers, such as polyethylene, polyamide or their blends, are excellent electrical insulators and are easy to process. It is used in the manufacture of electrical boxes and connectors or as cable housings. Electrical equipment can be a source of short circuits and fires, or they can come into contact with flames, which can catch fire and spread it down the cableway. To render these materials non-flammable, a wide variety of additives exist, some halogen-containing and others non-halogen. Halogen-based additives are increasingly banned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/34C08K5/00C08K5/49C08L23/00C08L23/02C08L23/04C08L23/06C08L23/08C08L23/10C08L51/06C08L77/00C08L77/02C08L77/06
CPCC08L23/10C08L23/06C08L23/0853C08L2201/02C08L51/06C08L2205/03C08L77/06C08L23/04C08L23/08C08L77/02C08L77/00C08L23/0815C08L23/02C08L2666/02C08L2666/14C08L2666/84C08L51/00C08L23/00
Inventor 菲利普·布郎德尔贝努特·布鲁尔尼古拉斯·弗雷诺伊斯让-雅克·弗拉特
Owner ATOFINA