Polypropylene material and its preparing process

A technology of polypropylene material and nucleating agent, which is applied in the field of polypropylene material, can solve the problems of unsatisfactory surface brightness, decrease of surface smoothness, and reduction of material impact performance, so as to improve dispersion effect and processing performance, improve surface brightness, The effect of increasing the OI value

Inactive Publication Date: 2010-10-06
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have shown that flame retardants such as octabromoether and decabromodiphenyl ether in materials will release a carcinogen during combustion, so the EU requires all electrical and electronic products to comply with the RoHS directive (the Restriction of the use of certain hazardous substances in electrical and electronic equipment (Restrictions on the Use of Certain Hazardous Substances in Electrical and Electronic Equipment), to ensure that electrical and electronic products do not contain octabromoether, pentabromoether and other substances
However, the flame retardant used to replace decabromodiphenyl ether - decabromodiphenylethane, when added to the material, the surface finish of the product is greatly reduced, and the impact performance of the material will be greatly reduced, so it cannot meet the requirements of the product. bright surface requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In parts by weight, PP resin 100, flame retardant hexabromocyclododecane 3, flame retardant synergist antimony trioxide 1, crosslinking agent DCP 0.1, β crystal nucleating agent 0.1, antioxidant 0.1 , mixed in a high-speed mixer for 3--5 minutes, the speed of the high-speed mixer is 800 rpm; then the mixed raw materials are placed in a parallel twin-screw extruder through melt extrusion and granulation, and the extrusion process is : Zone 1 160-170°C, Zone 2 170-180°C, Zone 3 170-180°C, Zone 4 165-175°C, screw speed 350-400r / min, feeding frequency 20-25Hz, melt Pressure 3.0~4.0MPa, vacuum degree -0.03~-0.06MPa.

Embodiment 2

[0035] In parts by weight, PP resin 100, flame retardant hexabromocyclododecane 6, flame retardant synergist antimony trioxide 2, crosslinking agent DCP 0.3, β crystal nucleating agent 0.3, antioxidant 0.3 , mixed in a high-speed mixer for 3 to 5 minutes, the speed of the high-speed mixer is 800 rpm; then the mixed raw materials are placed in a parallel twin-screw extruder for melt extrusion and granulation. The extrusion process is: Zone 1 160-170°C, Zone 2 170-180°C, Zone 3 170-180°C, Zone 4 165-175°C, screw speed 350-400r / min, feeding frequency 20-25Hz, melt pressure 3.0~4.0MPa, vacuum degree -0.03~-0.06MPa.

Embodiment 3

[0037] In parts by weight, PP resin 100, flame retardant hexabromocyclododecane 9, flame retardant synergist antimony trioxide 3, crosslinking agent DCP 0.5, β crystal nucleating agent 0.5, antioxidant 0.5 , mixed in a high-speed mixer for 3--5 minutes, the speed of the high-speed mixer is 800 rpm; then the mixed raw materials are placed in a parallel twin-screw extruder through melt extrusion and granulation, and the extrusion process is : Zone 1 160-170°C, Zone 2 170-180°C, Zone 3 170-180°C, Zone 4 165-175°C, screw speed 350-400r / min, feeding frequency 20-25Hz, melt Pressure 3.0~4.0MPa, vacuum degree -0.03~-0.06MPa.

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Abstract

The invention discloses a polypropylene material, which comprises the following parts: 100g PP resin, 3-9g fire retardant, 1-3g flame-proof coordinating agent, 0.1-0.5g crosslinking agent, 0.1-0.5g coring agent, 0.1-0.5g anti-oxidant, wherein the PP resin is uniform-polymeric PP; the fire retardant is hexabromocyclododecane; the crosslinking agent is DCP; the coring agent is beta-crystal coring agent; the anti-oxidant is allocated by phosphite anti-oxidant 168 and hindered phenol anti-oxidant 1010 with molar rate at 2: 1. The making method comprises the following steps: blending these components in the high-speed mixer according to weight rate for 3-5min; placing the raw material in the parallel double-screw squeezer; fusing; graining.

Description

[technical field] [0001] The invention relates to a polypropylene material, in particular to a polypropylene material with good toughness, high surface brightness, environmental protection and flame retardancy 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 (0I 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 prevention, making it widely used in household appliances, electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08K5/521B29B9/12B29C47/40B29C47/92C08K5/14B29C48/40B29C48/92
CPCB29C48/04B29C48/40
Inventor 徐东贺永杨书涛
Owner SHENZHEN KEJU NEW MATERIAL
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