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Flame retardant low foaming polypropylene material and preparation method thereof

A polypropylene material and polypropylene technology, applied in the field of flame-retardant low-foaming polypropylene material and its preparation, can solve problems such as difficult control of cell size and human health damage, and achieve wide environmental adaptability, product safety, and improved The effect of flame retardancy

Inactive Publication Date: 2012-03-07
GUANGZHOU SUPER DRAGON ENG PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Invention patent CN1665866A discloses a method for preparing open-cell polypropylene foam particles, wherein the blowing agent is an organic compound with a boiling point of -5°C to 150°C, or an inorganic gas, and the organic gas that volatilizes when the organic compound is foamed is used to Human health will cause harm, and it is difficult to control the cell size when using inorganic gas for foaming

Method used

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  • Flame retardant low foaming polypropylene material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Proportion according to the following mass percentage composition: polypropylene copolymer (MI: 7.5g / 10min) 45.6%, aluminum hydroxide (particle size 1.5um) 35%, red phosphorus 10%, ethylene-octene copolymer 8%, anti- Oxygen 1010 and antioxidant 168 each 0.1%, zinc stearate 0.2%, color masterbatch 1%. Add the above materials into a high-speed mixer and stir for 10 minutes, then add the uniformly stirred materials into the hopper of a parallel twin-screw extruder with a length-to-diameter ratio of L / D of 38:1 and a screw diameter of 30 mm. The temperature of each section of the machine from the hopper to the die head is (a total of six zones): 150°C, 160°C, 170°C, 170°C, 175°C, 180°C. The rotation speed is 28r / min, and then the materials are blended and melted and extruded; the above-mentioned pellets are cooled in a water tank, air-dried, and then enter a pelletizer for pelletizing to obtain a flame-retardant low-foaming polypropylene material. Some samples were taken f...

Embodiment 2

[0035] Proportion according to the following mass percentage composition: polypropylene copolymer (MI: 7.5g / 10min) 48.6%, aluminum hydroxide (particle size 1.5um) 25%, red phosphorus (microcapsule coated red phosphorus) 15%, ethylene- Octene copolymer 10%, antioxidant 1010 and antioxidant 168 each 0.1%, calcium stearate 0.2%, color masterbatch 1%. Add the above materials into a high-speed mixer and stir for 10 minutes, then add the uniformly stirred materials into the hopper of a parallel twin-screw extruder with a length-to-diameter ratio of L / D of 38:1 and a screw diameter of 30 mm. The temperature of each section of the machine from the hopper to the die head is (a total of six zones): 150°C, 160°C, 170°C, 170°C, 180°C, 180°C. The rotation speed is 28r / min, and then the materials are blended and melted and extruded; the above-mentioned pellets are cooled in a water tank, air-dried, and then enter a pelletizer for pelletizing to obtain a flame-retardant low-foaming polypropy...

Embodiment 3

[0038] Proportion according to the following mass percentage composition: recycled polypropylene regenerated pellets (MI: 5.3g / 10min) 58.6%, aluminum hydroxide (particle size 0.7um) 15%, triphenyl phosphate 20%, ethylene-octene copolymer 5%, antioxidant 1010 and antioxidant 168 each 0.1%, calcium stearate 0.2%, color masterbatch 1%. Add the above materials into a high-speed mixer and stir for 10 minutes, then add the uniformly stirred materials into the hopper of a parallel twin-screw extruder with an aspect ratio L / D of 38:1 and a screw diameter of 30mm, and set the extrusion The temperature of each section of the machine from the hopper to the die head is (a total of six zones): 150°C, 160°C, 170°C, 170°C, 180°C, 180°C, the screw speed of the main engine is 280r / min, and the speed of the hopper feed screw The rotation speed is 27r / min, and then the materials are blended and melted and extruded; the above-mentioned pellets are cooled in a water tank, air-dried, and then enter...

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Abstract

The invention discloses a flame retardant low foaming polypropylene material and a preparation method thereof. The material comprises, by mass, 10 to 90% of polypropylene, 5 to 30% of a thermally decomposing inorganic substance, 3 to 40% of a halogen-free fire retardant, 1 to 20% of a thermoplastic elastomer, 0.1 to 1% of an anti-oxidant, 0.1 to 3% of a lubricant and 0 to 5% of a functional auxiliary agent. According to the invention, the inorganic substance with low thermal decomposition temperature is added into a polypropylene resin as a foaming agent, and water vapor generated in the decomposition of the inorganic substance is utilized for formation of bubbles; the halogen-free fire retardant is added at the same time, which enables the polypropylene resin to have a certain degree of flame resistance, thereby enlarging the utilization scope of the polypropylene resin; a pre-foaming polypropylene material is obtained through blending fusion extrusion and granulation of an obtained mixture with an extruder, and then a variety of foaming products are produced by utilizing molding equipment like injection molding or mould pressing equipment.

Description

[0001] technical field [0002] The invention relates to the technical field of modification of polymer composite materials, in particular to a flame-retardant low-foaming polypropylene material and a preparation method thereof. [0003] Background technique [0004] The main varieties of foamed plastics are polyurethane (PU), polystyrene (PS) and polyolefin foamed plastics. Foamed PU has residues harmful to the human body during the foaming process, and it cannot be recycled; PS foam softens and deforms when used above 105°C, polyethylene PE foam is rarely used above 100°C, and polypropylene PP foam has a relatively high heat distortion temperature (above 110°C), and can be used in high temperature environments; the static load capacity of PP foam is better than that of PE, while amorphous PS is in a glass state at room temperature, and its impact performance is poor. Foam is easy to recycle and its environmental friendliness is superior to other foaming materials. Based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/16C08L23/08C08L23/00C08L53/02C08J9/06C08K13/02C08K3/02C08K3/32C08K5/521C08K3/38B29B9/06B29C47/92B29C44/00B29C48/92
CPCB29C48/04B29C48/05B29C48/40B29C48/911B29C48/919B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 郝源增袁海兵郝建鑫任萍
Owner GUANGZHOU SUPER DRAGON ENG PLASTICS
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