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Low-smoke halogen-free flame-retardant polypropylene foam material and preparation method thereof

A technology of flame-retardant polypropylene and foam materials, which is applied in the field of polypropylene foam materials, can solve the problems of poor compatibility between flame retardants and polypropylene and unsatisfactory flame-retardant effects, so as to improve flame-retardant effects and reduce hair loss. Smoke density and toxic and harmful gases, and the effect of improving mechanical properties

Active Publication Date: 2022-08-05
惠州市长园特发科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a low-smoke halogen-free flame-retardant polypropylene foam material and its preparation method, to solve the problem of compatibility between existing flame retardants and polypropylene Poor performance and unsatisfactory flame retardant effect

Method used

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  • Low-smoke halogen-free flame-retardant polypropylene foam material and preparation method thereof

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preparation example Construction

[0046] The present invention also provides a method for preparing a low-smoke halogen-free flame-retardant polypropylene foam material, comprising the following steps:

[0047] (1) granulating after mixing linear low density polyethylene, sensitizer, foaming agent, filler, modified glass fiber and antioxidant to obtain foaming master batch;

[0048] Irradiating polypropylene resin and caprolactone-modified methacrylate to obtain modified polypropylene;

[0049] The modified polypropylene, compatibilizer, halogen-free flame retardant and smoke suppressant are mixed and granulated to obtain matrix particles;

[0050] (2) extruding after mixing the foamed master batch, matrix particles and color master batch to obtain a sheet;

[0051] (3) The sheet is irradiated and then foamed to obtain a low-smoke halogen-free flame-retardant polypropylene foamed material.

[0052] In the present invention, the irradiation in step (1) is preferably electron irradiation; the irradiation dose ...

Embodiment 1

[0060] The present embodiment provides a low-smoke halogen-free flame-retardant polypropylene foam material, which is prepared from raw materials containing the following parts by mass:

[0061] Polypropylene resin (melt index is 2.5g / 10min) 50 parts, linear low density polyethylene (melt index is 3g / 10min) 20 parts, PP-g-MAH 5 parts, POE-g-MAH 10 parts, caprolactone 10 parts of modified methacrylate, 9.2 parts of polysiloxane, 13.8 parts of pentaerythritol polyphosphate melamine salt, 7 parts of aluminum hydroxide, 6 parts of azodicarbonamide, 10102 parts of antioxidant, 0.6 part of talcum powder , 3 parts of KH550 modified glass fiber, 1 part of color masterbatch, 2 parts of melamine triallyl ester.

[0062] Its preparation method comprises the following steps:

[0063] (1) mixing linear low density polyethylene, melamine triallyl ester, azodicarbonamide, talc, KH550 modified glass fiber, antioxidant 1010 and granulating at 110°C to obtain foaming master batch;

[0064] El...

Embodiment 2

[0069] The present embodiment provides a low-smoke halogen-free flame-retardant polypropylene foam material, which is prepared from raw materials containing the following parts by mass:

[0070] 42 parts of polypropylene resin (melt index is 2.2g / 10min), 18 parts of linear low density polyethylene (melt index is 3g / 10min), 3 parts of PP-g-MAH, 5 parts of POE-g-MAH, caprolactone 8 parts of modified methacrylate, 6 parts of polysiloxane, 24 parts of pentaerythritol polyphosphate melamine salt, 6 parts of magnesium hydroxide, 6 parts of 4,4'-oxodiphenylsulfonyl hydrazide, antioxidant 10101 parts, 1 part of montmorillonite, 5 parts of KH550 modified glass fiber, 0.5 part of color masterbatch, 1 part of trimethylolpropane trimethacrylate.

[0071] Its preparation method comprises the following steps:

[0072] (1) After mixing linear low density polyethylene, trimethylolpropane trimethacrylate, 4,4'-oxobisbenzenesulfonyl hydrazide, montmorillonite, KH550 modified glass fiber, and a...

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Abstract

The invention belongs to the technical field of polypropylene foam materials, and discloses a low-smoke halogen-free flame-retardant polypropylene foam material and a preparation method thereof. The material is prepared from the following raw materials: 40 to 60 parts of polypropylene resin, 10 to 20 parts of linear low-density polyethylene, 5 to 25 parts of compatilizer, 8 to 12 parts of caprolactone modified methacrylate, 20 to 30 parts of halogen-free flame retardant, 5 to 10 parts of smoke suppressant, 5 to 10 parts of foaming agent, 0.5 to 3 parts of antioxidant, 0.5 to 1 part of filler, 2 to 5 parts of modified glass fiber, 0.5 to 2 parts of color master batch and 0.8 to 3 parts of sensitizer. According to the invention, ester groups are grafted on the surface of polypropylene, polar groups are increased, and two compatilizers are compounded, so that the dispersity of the flame retardant in polypropylene is improved, and the flame retardant property is enhanced. By using the linear low-density polyethylene and the modified glass fiber, the melt strength of the polypropylene foam material is improved, the mechanical property is improved, and the application range is widened.

Description

technical field [0001] The invention relates to the technical field of polypropylene foam materials, in particular to a low-smoke halogen-free flame-retardant polypropylene foam material and a preparation method thereof. Background technique [0002] Due to its light weight, good heat resistance, high impact energy absorption capacity and good resilience, polypropylene foam materials are widely used in automobile anti-collision and other fields, and are gradually replacing polyurethane, polystyrene, polyethylene and other foam products . [0003] However, the limiting oxygen index of polypropylene is generally between 17 and 19%, and it will continue to burn after leaving the fire, which is a flammable material. The general method is to add flame retardants. At present, most halogen-containing flame retardants such as bromine and antimony are used in the market for flame retardant. However, the halogen-containing flame retardants will release HBr and other toxic and harmful...

Claims

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Application Information

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IPC IPC(8): C08J9/10C08L23/12C08L23/08C08L51/06C08L83/04C08K7/14C08K9/06C08K5/529C08K7/24
CPCC08J9/103C08J9/105C08J9/0061C08J9/0085C08J9/009C08J9/0038C08J9/0066C08J9/0095C08J2323/12C08J2423/08C08J2451/06C08J2483/04C08J2203/04
Inventor 魏立东罗文龙邱丽雁陈兴茂
Owner 惠州市长园特发科技有限公司
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