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Silane crosslinked halogen-free flame-retardant polyolefin composite material and preparation method thereof

A technology of silane cross-linking and composite materials, which is applied in the field of silane cross-linking halogen-free flame-retardant polyolefin composite materials and its preparation, which can solve the difficulties in the application of intumescent flame retardants, deterioration of polymer physical properties, and low flame-retardant efficiency, etc. problems, achieve excellent mechanical properties, good surface properties, and improve water resistance

Inactive Publication Date: 2016-09-28
ANHUI HUGEE NEW FLAME RETARDANT MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of flame retardant has the following disadvantages: low flame retardant efficiency, large addition amount (usually >60% by weight in the material), deterioration of the physical properties of the polymer, etc.
However, due to the differences in the preparation methods and physical properties of polyolefin materials obtained by different crosslinking methods (such as the need to use hot water as the crosslinking medium in the silane crosslinking system, this makes the application of intumescent flame retardants with poor water resistance more difficult), and there are many kinds of microencapsulated flame retardants with different properties, so how to introduce suitable microencapsulated flame retardants into silane crosslinked polyolefin materials to obtain flame retardant silane crosslinked polyolefin materials with excellent comprehensive performance Polyolefin materials are difficult problems to be solved by researchers and technology developers

Method used

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  • Silane crosslinked halogen-free flame-retardant polyolefin composite material and preparation method thereof
  • Silane crosslinked halogen-free flame-retardant polyolefin composite material and preparation method thereof
  • Silane crosslinked halogen-free flame-retardant polyolefin composite material and preparation method thereof

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Effect test

preparation example Construction

[0030] The preparation method of the silane crosslinked halogen-free flame-retardant polyolefin composite material of the present invention comprises the following steps:

[0031] (1) Preparation of base material: Mix the dry-treated polyolefin resin, silane, initiator, lubricant, antioxidant and anti-crosslinking agent in a high-speed mixer at a low speed, and then force feed the In the twin-screw extruder, the processing temperature is controlled at 180°C~220°C, extruded and granulated, and dried at 70°C~80°C for 2~4 hours to obtain the base material;

[0032] (2) Preparation of flame retardant masterbatch: Mix the dry-processed polyolefin resin, flame retardant, flame retardant synergist, lubricant and antioxidant in a banbury mixer evenly, and pass Double-cone forced feeding in a twin-screw extruder, the processing temperature is controlled at 120°C~170°C, extruded and granulated, and dried at 70°C~80°C for 2~4 hours to obtain flame retardant masterbatch;

[0033] (3) Pre...

Embodiment 1

[0041] The silane crosslinked halogen-free flame-retardant polyolefin composite material of this embodiment is prepared as follows:

[0042] (1) Preparation of base material: dry treated 98.3 parts of polyethylene, 1.5 parts of vinyltrimethoxysilane, 0.06 parts of initiator dicumyl peroxide, 0.02 parts of perfluoropolyether oil, 0.02 parts of antioxidant 1010 and 0.1 part of anti-crosslinking agent caprolactam are mixed evenly in a high-speed mixer at a low speed, and then forced to feed in a twin-screw extruder at 180°C~220°C, extruded and granulated, and dried at 80°C for 4 hours to obtain Binder.

[0043] (2) Preparation of flame retardant masterbatch: Dry 50 parts of polyethylene, 4 parts of maleic anhydride grafted polyethylene resin, 8.8 parts of triazine hyperbranched charcoal agent, 35.2 parts of silicone gel (siloxane ) Microencapsulated ammonium polyphosphate, 1 part of flame retardant synergist zeolite powder, 0.5 part of lubricant zinc stearate and 0.5 part of ant...

Embodiment 2

[0050] The silane crosslinked halogen-free flame-retardant polyolefin composite material of this embodiment is prepared as follows:

[0051] (1) Preparation of base material: 94.8 parts of ethylene-vinyl acetate copolymer, 4 parts of vinyltriethoxysilane, 0.2 part of initiator tert-butyl peroxyacetate, 0.2 part of lubricant stearic acid Zinc, 0.2 parts of antioxidant 168 and 0.6 parts of anti-crosslinking agent aniline are mixed uniformly in a high-speed mixer at a low speed, and then forced to feed in a twin-screw extruder at 180 ° C ~ 220 ° C, extruded and granulated, at 70 ° C Under drying for 4 hours to obtain the base material.

[0052] (2) Preparation of flame retardant masterbatch: dry treated 20 parts of ethylene-vinyl acetate copolymer, 7 parts of maleic anhydride grafted ethylene-vinyl acetate copolymer, 32.5 parts of triazine hyperbranched carbon former, 32.5 parts Melamine resin microencapsulated melamine polyphosphate, 5 parts of flame retardant synergist magnesi...

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Abstract

The invention relates to a silane crosslinking halogen-free flame retardant polyolefin composite material. The composite material is prepared by uniformly mixing a base stock, a flame-retardant master batch and a catalyzing master batch according to a weight ratio of 50:45:5, extruding the materials through a screw extruder, and conducting a cross-linking reaction through a warm water bath or a steam bath to prepare the product. A phosphorus-nitrogen compound flame retardant system is prepared by compounding a microencapsulated flame retardant and a macromolecular hyperbranched triazine char forming agent; the flame-retardant master batch, the catalyzing master batch and the base stock are separately prepared and then mixed to prepare the silane crosslinking halogen-free flame retardant polyolefin composite material. Compared to the prior art, the flame retardant efficiency, the water resisting property and the durability of the material are obviously increased; furthermore, the good surface properties and the excellent mechanical properties of the material are kept.

Description

technical field [0001] The invention belongs to the technical field of preparation of flame-retardant polyolefin materials, and in particular relates to a silane-crosslinked halogen-free flame-retardant polyolefin composite material and a preparation method thereof. Background technique [0002] Cross-linked polyolefin materials have excellent mechanical and physical properties, electrical properties, high service temperature, corrosion resistance, and good heat resistance. They are being increasingly used in the preparation of electricity, energy, petrochemicals, electronics, communications, Wire and cable for information, locomotive and other industries. [0003] There are three main crosslinking methods for polyolefin materials: radiation crosslinking, peroxide crosslinking and silane crosslinking. Among them, the polyolefin material produced by irradiation crosslinking has high purity and simple production process, but the equipment is expensive, there is radiation poll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L51/06C08L23/08C08L23/16C08L53/02C08K13/06C08K3/32C08J3/24B29B9/06
CPCC08J3/226C08J3/24C08J2323/06C08J2323/08C08J2323/16C08L23/06C08L23/0815C08L23/0853C08L23/16C08L2201/02C08L2201/22C08L2205/03C08L51/06C08K13/06C08K9/10C08K5/5425C08K2003/323C08L51/00C08K5/34922C08L51/04
Inventor 吴瑞影秦正兵汪慧陆文荣
Owner ANHUI HUGEE NEW FLAME RETARDANT MATERIAL
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