Flame-proof reinforced polypropylene material and method for preparing same

A technology of polypropylene material and flame retardant, which is applied in the field of flame retardant reinforced polypropylene material and its preparation, which can solve the problems of long-term storage of finished products such as frosting on the surface, inability to add mineral fillers, restrictions on application and promotion, etc., and achieve heat resistance Oxidation properties are improved, OI value is increased, and the preparation process is simple.

Inactive Publication Date: 2008-03-12
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the PP halogen-free intumescent flame retardants currently on the market have the disadvantages of not being able to add mineral fillers to increase the strength of the material, and the surface of the finished product will be frosted after long-term storage, so the application and promotion are greatly restricted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In parts by weight, mix PP resin 100, halogen-free flame retardant 50, alkali-free glass fiber 15, and antioxidant 0.2 in a high-speed mixer for 3-5 minutes, and the speed of the high-speed mixer is 800 rpm; Then put the mixed raw materials in a parallel twin-screw extruder for melt extrusion and granulation. The extrusion process is: 180--190°C in the first zone, 190--200°C in the second zone, and 190--200°C in the third zone. 200℃, four zones 190--200℃, screw speed 350-400r / min, feeding frequency 20-25Hz, melt pressure 3.0-4.0MPa, vacuum degree -0.04--0.07MPa.

Embodiment 2

[0030] In parts by weight, mix PP resin 100, halogen-free flame retardant 60, alkali-free glass fiber 40, and antioxidant 0.5 in a high-speed mixer for 3-5 minutes, and the speed of the high-speed mixer is 800 rpm; Then put the mixed raw materials in a parallel twin-screw extruder for melt extrusion and granulation. The extrusion process is: 180--190°C in the first zone, 190--200°C in the second zone, and 190--200°C in the third zone. 200℃, four zones 190--200℃, screw speed 350-400r / min, feeding frequency 20-25Hz, melt pressure 3.0-4.0MPa, vacuum degree -0.04--0.07MPa.

Embodiment 3

[0032] In parts by weight, mix PP resin 100, halogen-free flame retardant 75, alkali-free glass fiber 75, and antioxidant 1 in a high-speed mixer for 3-5 minutes, and the speed of the high-speed mixer is 800 rpm; Then put the mixed raw materials in a parallel twin-screw extruder for melt extrusion and granulation. The extrusion process is: 180--190°C in the first zone, 190--200°C in the second zone, and 190--200°C in the third zone. 200℃, four zones 190--200℃, screw speed 350-400r / min, feeding frequency 20-25Hz, melt pressure 3.0-4.0MPa, vacuum degree -0.04--0.07MPa.

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Abstract

The invention discloses a fire-resistance enhancing polypropylene material and a preparing method for the polypropylene material. The material comprises the following components and portions by weight: PP resin 100, halogen-free expanding fire retardant 50-75, enhancing modifier 15-75, and antioxidant 0.2-1.0, wherein, the fire retardant is a self-prepared built halogen-free expanding fire retardant, formed by physically mixing N-P fire retardant and polyorganoxiloxane in 1:0.1-1:0.3 by weight. The invention complexes N-P fire retardant of high fire resistance with a flame-resisting assistant, namely organic silicon, and improves the OI value of material. The product from the material will not frost on surface when storing for a long time, and 5-30% talcum powder or glass fiber can be added, so the invention thoroughly solves the shortcoming of prior product that the surface will frost if storing for a long time and no mineral filler can be added to increase the material strength, truly realizes halogen freedom, environmental friendliness, high strength and usability for a long term. The preparing process of the fire-resistance enhancing polypropylene is simple without adding any complex equipment.

Description

[technical field] [0001] The invention relates to the technical field of polymer materials, in particular to a flame-retardant reinforced polypropylene material and a preparation method thereof. [Background technique] [0002] Polypropylene (PP) is one of the five general-purpose plastics with a density of 0.90g / cm 3 , is the second lightest polymer material in existing resins (only larger than polymethylpentene, with a density of 0.85g / cm 3 ). Because of its good performance, small specific gravity, and easy molding and processing, it is widely used in the automobile industry, household appliances, electronic instrument industry, and textile industry. [0003] However, because the limiting oxygen index (OI value) of PP resin is very low, only 18, it is a flammable material and cannot meet the requirements for the use of specific materials in the field of fire protection, making it widely used in household appliances, electronic instrument industry, textile industry and ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K7/14C08K5/524C08K3/34C08L83/04C08L51/00
Inventor 徐东贺永杨书涛
Owner SHENZHEN KEJU NEW MATERIAL
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