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Polypropylene resin foam concentrate and preparation method thereof

A polypropylene resin and foaming masterbatch technology, applied in the field of polypropylene resin foaming masterbatch and its preparation, can solve the problems of unsuitable polypropylene foaming molding, complex masterbatch production process, large equipment investment and the like, and achieve molecular weight The effect of smaller, lower crystallinity, higher melt strength

Active Publication Date: 2012-07-25
上海萍青工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the masterbatch is a kind of heat-expandable microcapsules, and the shell is formed by free polymerization of polymerizable monomers. The peroxide used as an initiator can easily cause polypropylene to degrade during the molding process, so it is not suitable for polypropylene foaming forming
Moreover, the production process of the masterbatch is complicated, the investment in equipment is large, and the processing process causes pollution to the environment

Method used

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  • Polypropylene resin foam concentrate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation of embodiment 1 polypropylene resin foaming masterbatch

[0041] 100 kilograms of polypropylene resin, irradiated by high-energy electron beams under an electron accelerator, the absorbed dose is 15kGy, add 6 kilograms of sodium bicarbonate, 3 kilograms of sodium citrate, 30 kilograms of azodicarbonamide, 5 kilograms of talcum powder, 500 grams of four (3,5-di-tert-butyl-4-hydroxy)pentaerythritol phenylpropionate, 1 kg of stearic acid and 500 g of paraffin, mixed in a high-speed mixer for 6 minutes at a mixing temperature of 40°C and a speed of 600-900r / min . After the material is discharged, it is compounded and extruded in the COPERION two-stage extruder. The temperature of the nine heating zones of the twin-screw extruder is set to 110°C, 115°C, 120°C, 125°C, 125°C, 130°C, and 130°C. °C, 130 °C, 120 °C, the screw speed is 300 r / min, the temperature of the three heating zones of the single-screw extruder is set to 130 °C, 135 °C, 130 °C in turn, and ...

Embodiment 2

[0043] The preparation of embodiment 2 polypropylene resin foam masterbatch

[0044] 100 kilograms of polypropylene resin, irradiated by high-energy electron beams under an electron accelerator, the absorbed dose is 20kGy, add 6 kilograms of sodium bicarbonate, 3 kilograms of sodium citrate, 30 kilograms of azodicarbonamide, 5 kilograms of talcum powder, 500 grams of four (3,5-di-tert-butyl-4-hydroxy)pentaerythritol phenylpropionate, 1 kg of stearic acid and 500 g of paraffin, mixed in a high-speed mixer for 6 minutes at a mixing temperature of 40°C and a speed of 600-900r / min . After the material is discharged, it is compounded and extruded in the COPERION two-stage extruder. The temperature of the nine heating zones of the twin-screw extruder is set to 110°C, 115°C, 120°C, 125°C, 125°C, 130°C, and 130°C. °C, 130 °C, 120 °C, the screw speed is 300 r / min, the temperature of the three heating zones of the single-screw extruder is set to 130 °C, 135 °C, 130 °C in turn, and the ...

Embodiment 3

[0046] The preparation of embodiment 3 polypropylene resin foam masterbatch

[0047] 100 kilograms of polypropylene resin, irradiated by high-energy electron beams under an electron accelerator, the absorbed dose is 25kGy, add 6 kilograms of sodium bicarbonate, 3 kilograms of sodium citrate, 30 kilograms of azodicarbonamide, 5 kilograms of talcum powder, 500 grams of four (3,5-di-tert-butyl-4-hydroxy)pentaerythritol phenylpropionate, 1 kg of stearic acid and 500 g of paraffin, mixed in a high-speed mixer for 6 minutes at a mixing temperature of 40°C and a speed of 600-900r / min . After the material is discharged, it is compounded and extruded in the COPERION two-stage extruder. The temperature of the nine heating zones of the twin-screw extruder is set to 110°C, 115°C, 120°C, 125°C, 125°C, 130°C, and 130°C. °C, 130 °C, 120 °C, the screw speed is 300 r / min, the temperature of the three heating zones of the single-screw extruder is set to 130 °C, 135 °C, 130 °C in turn, and th...

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Abstract

The invention relates to a polypropylene resin foam concentrate and a preparation method thereof. The foam concentrate is prepared by taking irradiation modified polypropylene resins as basic raw materials through the steps of adding additives such as a chemical foaming agent, a nucleating agent and a lubricant and the like into the basic raw materials, and uniformly mixing the mixture in a high-speed mixer; and then, adding the obtained mixture into a tandem extruder to carry out extrusion and granulation, thereby obtaining the polypropylene resin foam concentrate. The polypropylene resin foam concentrate provided by the invention can be applied to the extrusion of polypropylene foamed sheets, foamed pipes and foamed profiles; the polypropylene resin foam concentrate is high in modulus of foaming products, good in heat resistance, uniform in foaming hole, and adjustable in density, thereby opening up a new way for the extrusion and foaming of polypropylenes.

Description

[0001] technical field [0002] The invention relates to a polypropylene resin foaming masterbatch and a preparation method thereof. More specifically, the invention relates to a method for manufacturing a polypropylene resin foaming masterbatch through a two-stage extruder. [0003] Background technique [0004] Polypropylene (PP) is widely used in various fields due to its heat resistance, chemical stability and environmental protection. Some developed countries are vigorously developing polypropylene foam materials. [0005] Polypropylene extrusion foaming is generally foamed by physical and chemical methods. Chemical foaming is to add chemical foaming agent and other additives to polypropylene resin, mix well and extrude foaming in an extruder. Most of the traditional organic chemical foaming agents are exothermic foaming agents, that is, a large amount of heat is generated during the decomposition process, so that the melt viscosity of polypropylene, which has low mel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08J9/06C08J9/08C08J9/10C08J3/28C08K13/02B29B9/06
Inventor 陈长青欧小波胡圣飞张冲谢伟
Owner 上海萍青工贸有限公司
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