Flame-retardant low-warpage glass fiber reinforced polypropylene composite material and preparation method thereof

A composite material, polypropylene technology, applied in the field of plastics, can solve problems such as difficult processing, warping and deformation, poor surface properties, etc., to improve mechanical properties and abrasion resistance, improve the difference in shrinkage rate, and increase crystallinity Effect

Inactive Publication Date: 2019-02-15
安庆市泽烨新材料技术推广服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But usually as the amount of glass fiber filled in polypropylene resin increases, the high degree of orientation makes a big difference between the shrinkage rate of the molded product in the flow direction and perpendicular to the flow direction, so that it causes warping of the final product, It is difficult to be used in rotating parts that require high dimensional stability, such as fans, inner barrels,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A flame-retardant low-warpage glass fiber reinforced polypropylene composite material, calculated in parts by weight, includes the following components:

[0022] 61 parts of polypropylene copolymer, 12 parts of alkali-free glass fiber, 25 parts of organically coated modified silicon carbide powder, 10 parts of four-acicular nano-zinc oxide whiskers, 3 parts of dimethyl itaconate, 16 parts of ammonium polyphosphate, 2 parts of isopropyl tris(dioctyl phosphate acyloxy) titanate, 9 parts of ethylene-octene copolymer, 0.9 parts of subphenolic heat stabilizer, tetrakis[β-(3,5-di-tert-butyl 0.5 part of -4-hydroxyphenyl) propionic acid] pentaerythritol ester and 0.9 part of zinc stearate. The organic-coated modified silicon carbide powder is obtained by first treating silicon carbide with a silane coupling agent and then grafting acrylamide on the surface.

[0023] Preparation:

[0024] Copolymerized polypropylene, alkali-free glass fiber accounting for 36% of the total mass...

Embodiment 2

[0026] A flame-retardant low-warpage glass fiber reinforced polypropylene composite material, calculated in parts by weight, includes the following components:

[0027] 55 parts of polypropylene copolymer, 15 parts of alkali-free glass fiber, 20 parts of organically coated modified silicon carbide powder, 12 parts of tetraacicular nano-zinc oxide whiskers, 2 parts of dimethyl itaconate, 10 parts of ammonium polyphosphate, 1 part of isopropyl tris(dioctyl phosphate acyloxy) titanate, 6 parts of ethylene-octene copolymer, 0.5 part of subphenolic heat stabilizer, tris(2,4-di-tert-butylbenzene phosphite) base) ester 0.2 part and zinc stearate 0.6 part. The organic-coated modified silicon carbide powder is obtained by first treating silicon carbide with a silane coupling agent and then grafting acrylamide on the surface.

[0028] Preparation:

[0029] Copolymerized polypropylene, alkali-free glass fiber accounting for 30% of the total mass, isopropyl tri(dioctyl phosphate acyloxy...

Embodiment 3

[0031] A flame-retardant low-warpage glass fiber reinforced polypropylene composite material, calculated in parts by weight, includes the following components:

[0032] 65 parts of homopolypropylene, 10 parts of alkali-free glass fiber, 30 parts of organically coated modified silicon carbide powder, 8 parts of tetraacicular nano-zinc oxide whiskers, 4 parts of dimethyl itaconate, 20 parts of melamine polyphosphate , 3 parts of isopropyl titanate triisostearate, 12 parts of ethylene-propylene-diene copolymer, 1.2 parts of phosphite heat stabilizer, tetrakis[β-(3,5-di-tert-butyl-4 0.8 parts of -hydroxyphenyl)propionic acid] pentaerythritol ester and 1.8 parts of polypropylene wax. The organic-coated modified silicon carbide powder is obtained by first treating silicon carbide with a silane coupling agent and then grafting acrylamide on the surface.

[0033] Preparation:

[0034] Homopolypropylene, alkali-free glass fiber accounting for 40% of the total mass, isopropyl triisost...

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PUM

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Abstract

The invention provides a flame-retardant low-warpage glass fiber reinforced polypropylene composite material and a preparation method thereof. The flame-retardant low-warpage glass fiber reinforced polypropylene composite material comprises the following components: polypropylene resin, alkali-free glass fiber, organic coated modified silicon carbide powder, four-needle nanometer zinc oxide whiskers, a halogen-free flame retardant, dimethyl itaconate, a titanate coupling agent, a toughening agent, a heat stabilizer, an antioxidant and a lubricant. The preparation method comprises the followingsteps: adding polypropylene resin, alkali-free glass fiber accounting for 30-40% of the total mass, the titanate coupling agent, the halogen-free flame retardant, the toughening agent, the heat stabilizer, the antioxidant and the lubricant into a twin-screw extruder from a main feed port, adding the organic coated modified silicon carbide powder, dimethyl itaconate and the remaining alkali-free glass fiber into the twin-screw extruder from a side feed port, and performing melt extrusion and granulation, wherein the extrusion temperature is 205-245 DEG C. The composite material not only has relatively good low warpage and friction resistance, but also has very good flame retardant properties.

Description

technical field [0001] The invention belongs to the technical field of plastics, and in particular relates to a flame-retardant low-warpage glass fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene, as a general-purpose plastic, has entered every corner of daily life. Polypropylene modified with mineral powder has been widely used in household appliances due to its good rigidity, low shrinkage and deformation. The currently used method is to add elastomer materials to the polypropylene matrix to improve the impact strength, and to improve the tensile strength, bending strength and bending modulus by introducing 10-40% talcum powder, mica powder, wollastonite, kaolin and other fillers. The amount of scratch resistance is improved by introducing scratch resistance agents such as silicone masterbatches and amide-containing resins. [0003] Polypropylene is one of the five general-purpose plastics. It h...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08K9/10C08K9/06C08K3/34C08K7/08C08K3/32C08K5/3492C08K7/14C08K5/11C08J5/04
CPCC08J5/043C08J2323/12C08J2323/14C08K3/34C08K5/11C08K5/34928C08K7/08C08K7/14C08K9/06C08K9/10C08K2003/323
Inventor 汪琦
Owner 安庆市泽烨新材料技术推广服务有限公司
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