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Metal hydroxide halogen-free anti-flaming polyolefin composition and preparation method thereof

A hydroxide and compound technology, applied in the field of flame retardant polyolefin compounds, can solve the problems of not being able to achieve synergistic flame retardant, not having, etc., to achieve the effects of multi-functionalization, easy raw materials, and enhanced mechanical properties

Inactive Publication Date: 2011-08-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mechanical properties and processability of the composite can be improved by using the above-mentioned interfacial modifiers, because these interfacial modifiers do not have functional groups that are flame-retardant or have a synergistic flame-retardant effect with metal hydroxides, they are not effective in improving metal hydroxides. Compatibility with polyolefin materials cannot achieve synergistic flame retardancy with metal hydroxides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Take 667g of magnesium hydroxide without surface treatment with a particle size of 3 μm, and mix it with 0.67g gamma-phosphonic acid ethyl ester methyl diethoxy Base silane and 1 g of diphenyl dihydroxy silane were mixed for 0.5 hour to obtain pretreated magnesium hydroxide. At 25°C, pretreated magnesium hydroxide, 1000g linear low density polyethylene, 1.67g tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester were mixed in a high-speed mixer Mix evenly in an extruder, then extrude and granulate in an extruder, and the extrusion temperature is between 160 and 180°C. The flame retardant properties, mechanical properties and rheological properties of the obtained materials are shown in Table 1.

Embodiment 2

[0026] Example 2: Weigh 900 g of untreated aluminum hydroxide with a particle size of 3 μm, and mix it with 0.5 g of γ-phosphonic acid methyl ester methyl diethoxy at a temperature of 120° C. Base silane and 1g resorcinol (diphenyl phosphate) were mixed for 0.2 hours to obtain pretreated aluminum hydroxide. At 80°C, pretreated magnesium hydroxide was mixed with 400g linear high-density polyethylene, 50g linear low-density polyethylene, 1.5g bis(2,4-di-tert-butylphenyl) pentaerythritol bis-diphosphite, 50g Triphenyl phosphate, 50g of tricresyl phosphate, and 50g of red phosphorus are uniformly mixed in a high-speed mixer, and then extruded and granulated in an extruder, and the extrusion temperature is between 170 and 200°C. The flame retardant properties, mechanical properties and rheological properties of the obtained materials are shown in Table 1.

Embodiment 3

[0027] Embodiment 3: Weigh 50 g of untreated aluminum hydroxide with a particle size of 0.1 μm and 400 g of untreated magnesium hydroxide with a size of 60 μm, and place them in a high-speed mixer in a reactor with stirring at 1000 rpm at 25 Mix with 10g bisphenol A-bis(diphenyl phosphate), 10g triphenyl phosphate, 20g diphenyl dichlorosilane, 30g trimethyl borate, 5g γ-aminopropyltriethoxysilane at a temperature of ℃ For 1 hour, a pretreated metal hydroxide mixture was obtained. At 100°C, the pretreated metal hydroxide was mixed with 400g homopolypropylene, 400g random copolymer polypropylene, 70g linear low density polyethylene, 15g 2,6-di-tert-butyl p-cresol, 15g phosphite tris( 2,4-di-tert-butylphenyl) ester and 75 g of tricresyl phosphate were uniformly mixed in a high-speed mixer, and then extruded and granulated in an extruder, and the extrusion temperature was between 160 and 180° C. The flame retardant properties, mechanical properties and rheological properties of t...

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Abstract

The present invention discloses one kind of no-halogen fireproof composite material of metal hydroxide and polyolefin and its preparation process. The no-halogen fireproof composite material consists of metal hydroxide 40-60 weight portions, polyolefin 30-60 weight portions, interface modifier 0.1-5 weight portions, synergistic fire retardant 0-10 weight portions and antioxidant 0.1-2 weight portions. It is prepared through the first pre-treating metal hydroxide with the interface modifier, and the subsequent mixing and extruding all the materials. The no-halogen fireproof composite material has high fireproof performance and excellent mechanical performance, and may be used in electric wire and cable, pipe and rod.

Description

technical field [0001] The invention relates to a flame-retardant polyolefin compound, in particular to a metal hydroxide polyolefin compound and a preparation method thereof. Background technique [0002] Polyolefin materials mainly include polyethylene and polypropylene. Polyethylene materials include high-density polyethylene, low-density polyethylene, and linear low-density polyethylene. Polypropylene includes isotactic polypropylene and syndiotactic polypropylene. Several varieties such as propylene, random polypropylene and random copolymer polypropylene. Polyolefin materials are widely used. Polyethylene is widely used in wire and cable materials, films and packaging materials. Polypropylene has a large market in the fields of building materials, biaxially oriented films and industrial structural parts. However, the limiting oxygen index of polyolefin materials is only 17-18, which belongs to flammable materials, and the flame retardancy of materials is required in m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/22C08L23/10C08L23/06C08K5/55B29C47/36C08K5/541C08K3/02
Inventor 赵建青孔祥建刘述梅叶华
Owner SOUTH CHINA UNIV OF TECH
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