Halogen-free flame-retardant polypropylene composite for auto fuse holder, preparation method and application

A flame-retardant polypropylene and fuse box technology, applied in the field of modified plastics, to achieve the effects of excellent folding resistance, high heat distortion temperature, and high CTI value

Inactive Publication Date: 2012-07-25
KINGFA SCI & TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the automobile fuse box is mainly made of talcum powder filled polypropylene injection molding, but the flame retardant grade of this material can only meet the requirements of UL94 HB grade

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method for a halogen-free flame-retardant polypropylene compound for an automobile fuse box, comprising the following steps:

[0042] Graft 40 kg of polypropylene PP S700, 42.5 kg of polypropylene PP SM256, 0.3 kg of phenolic heat stabilizer Irganox 1010 (CIBA company), 0.2 kg of processing aid EBS, and 2 kg of glycidyl methacrylate (GMA) Polypropylene, 10 kg of intumescent flame retardant FP-2200, and 5 kg of talc powder are melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 1:40. The flame retardant is added from the side feed, and the extrusion temperature is 200 °C, extruded and granulated to obtain a halogen-free flame-retardant polypropylene compound for automobile fuse boxes.

[0043] The properties of the resulting product are as follows:

[0044] performance

[0045] Number of folds

Embodiment 2

[0047] A preparation method for a halogen-free flame-retardant polypropylene compound for an automobile fuse box, comprising the following steps:

[0048] 50 kg of polypropylene PP BX3800, 21 kg of polypropylene PP SM198, 0.5 kg of phenolic heat stabilizer Irganox 1010 (CIBA company), 0.5 kg of processing aid EBS, 3 kg of maleic anhydride (MAH) grafted polypropylene, 15 Kilograms of intumescent flame retardant FP-2200 and 10 kilograms of wollastonite were melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 1:40. The flame retardant was fed from the side, and the extrusion temperature was 200°C. Through granulation, a halogen-free flame-retardant polypropylene compound for automobile fuse boxes is obtained.

[0049] The properties of the resulting product are as follows:

[0050] performance

Embodiment 3

[0052] A preparation method for a halogen-free flame-retardant polypropylene compound for an automobile fuse box, comprising the following steps:

[0053] 60 kg of polypropylene PP RP346R, 0.5 kg of phenolic heat stabilizer Irganox 1010 (CIBA company), 0.5 kg of processing aid calcium stearate, 4 kg of maleic anhydride (MAH) grafted polypropylene, 20 kg of intumescent flame retardant FP-2200 and 15 kg of kaolin were melted, mixed and dispersed in a twin-screw extruder with a length-to-diameter ratio of 1:40. The flame retardant was added from the side feed, and the extrusion temperature was 200 ° C. Extruded and granulated to obtain automobile Halogen-free flame retardant polypropylene compound for fuse box.

[0054] The properties of the resulting product are as follows:

[0055] performance

[0056] Tensile Strength

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Abstract

The invention discloses a halogen-free flame-retardant polypropylene composite for an auto fuse holder, a preparation method and application. The polypropylene composite is prepared by 32-83% of polypropylene, 0-1% of heat stabilizer, 0-1% of processing agent, 10-30% of halogen-free intumescent flame retardant, 2-6% of compatilizer and 5-30% of reinforcing filler, wherein the halogen-free intumescent flame retardant refers to phosphorus-nitrogen halogen-free intumescent flame retardant. The halogen-free flame-retardant polypropylene composite for the auto fuse holder has excellent flame-retardant effect, high CTI (comparative tracking index) value, good comprehensive mechanical property, excellent folding resistance and high heat distortion temperature, the flame retardant property can reach 1.6mm V0, tensile strength is larger than or equal to 30MPa, bending modulus is larger than or equal to 2000MPa, CTI is larger than or equal to 500V, hinge folding times are larger than or equal to 106, notch impact strength is larger than or equal to 3.5KJ / m2, and heat distortion temperature (0.45MPa) is larger than or equal to 120 DEG C.

Description

technical field [0001] The invention belongs to the field of modified plastics, and in particular relates to a halogen-free flame-retardant polypropylene compound for automobile fuse boxes and its preparation method and application. The polypropylene compound has high flame retardancy, high CTI value, folding resistance, and high Heat resistance and excellent comprehensive mechanical properties. Background technique [0002] At present, automotive fuse boxes are mainly injection-molded with talcum powder-filled polypropylene, but the flame-retardant grade of this material can only meet the requirements of UL94 HB grade. [0003] With the development of the automobile industry, the flame retardant grade of automotive fuse box materials will be further improved, and the requirements for CTI value and halogen-free will gradually increase. Therefore, it is imperative to develop automotive fuse box materials with UL94 V-0 flame retardant grade. must do. Contents of the inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L51/00C08L51/06C08K13/02C08K13/04C08K7/28C08K3/34C08K3/26C08K3/30B29C47/92B29C48/92
CPCB29C48/40
Inventor 陈瑶宁凯军刘奇祥李永华罗忠富杨波王灿耀
Owner KINGFA SCI & TECH CO LTD
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