Low-VOC-content polypropylene resin and preparation method thereof

A technology of polypropylene resin and polypropylene, applied in the preparation of polypropylene resin with low VOC content, in the field of polypropylene resin with low VOC content, can solve the problems of reducing the content of total volatile organic compounds and residues of volatile organic compounds, and achieve low input cost , Simple and reliable operation process

Pending Publication Date: 2021-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention uses a boiling drying bed to process polypropylene, which significantly reduces the content of total volatile organic compounds in the polypropylene material and solves the problem of residual volatile organic compounds in the polypropylene resin

Method used

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  • Low-VOC-content polypropylene resin and preparation method thereof
  • Low-VOC-content polypropylene resin and preparation method thereof

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preparation example Construction

[0027] The invention provides a method for preparing polypropylene resin with low VOC content, comprising the following steps: pretreating polypropylene through a fluidized drying bed, then drying the treated polypropylene in a vacuum oven, and then drying the dried polypropylene and Processing aids are blended, extruded and granulated, wherein the pretreatment conditions of the fluidized drying bed include: the temperature of the air inlet is 80-150°C, the wind speed of the air inlet is 1-25m / s, the gas-solid ratio is ≥3, The pretreatment time is 30-120 minutes.

[0028] According to a specific embodiment of the present invention, the preparation method includes the following steps:

[0029] S1. Polypropylene is placed in a fluidized drying bed for pretreatment;

[0030] S2. drying the polypropylene pretreated in a fluidized drying bed in a vacuum oven;

[0031] S3. Dry blending the dried polypropylene and the processing aid in a mixing device to obtain a mixture;

[0032]...

Embodiment 1～4

[0046]The polypropylene pellets (YPJ-3100H, Sinopec Yangzi Petrochemical Co., Ltd.) were blown with hot air at 120-150°C for 30-120 minutes in the fluidized drying bed (FG series fluidized dryer, Changzhou Zhenhua Drying Equipment Co., Ltd.), and then Put the polypropylene pellets in a vacuum oven to vacuum dry to obtain dry polypropylene pellets; then put the treated polypropylene pellets and processing aids into a high-speed mixer and stir for 3 minutes at a speed of 300 rpm , so that the components are fully mixed evenly; then the above-mentioned mixed materials are added from the main material inlet, and the BUSS mixing unit (MKD-30, Swiss BUSS company) in the range of 190 ° C to 220 ° C is kept at a vacuum degree of -0.08MPa Extrusion granulation under certain conditions to obtain low VOC polypropylene resin. Its specific formula and process parameters are shown in Table 1, wherein the content of each component is calculated in parts by weight.

[0047] The extruded pell...

Embodiment 5～8

[0049] The polypropylene resin (YPJ-630, Sinopec Yangzi Petrochemical Branch) was blown with hot air at 120-150°C for 40-90 minutes in the fluidized drying bed (FG series fluidized dryer, Changzhou Zhenhua Drying Equipment Co., Ltd.), and then The polypropylene granules are vacuum-dried in a vacuum oven to obtain dry polypropylene granules; then the treated polypropylene resin and processing aids are put into a high-speed mixer and stirred for 3 minutes at a speed of 300 rpm. Make each component fully mixed and uniform; then add the above-mentioned mixed material from the main material inlet, pass through the BUSS mixing unit (MKD-30, Swiss BUSS company) in the range of 190 ° C to 220 ° C, and keep the vacuum degree -0.08MPa Extrusion and granulation under the same conditions to obtain low VOC polypropylene resin. Its specific formula and process parameters are shown in Table 1, wherein the content of each component is calculated in parts by weight.

[0050] The extruded pell...

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Abstract

The invention belongs to the field of polypropylene resin, and relates to low-VOC-content polypropylene resin and a preparation method thereof. The method comprises the following steps that polypropylene is pretreated through a fluidized drying bed, then the treated polypropylene is dried in a vacuum oven, then the dried polypropylene and a processing aid are blended, extruded and granulated, and the pretreatment conditions of the fluidized drying bed include the conditions that the air inlet temperature is 80-150 DEG C, the air speed of an air inlet is 1-25 m/s, the gas-solid ratio is larger than or equal to 3, and the pretreatment time is 30-120 min. According to the low-VOC-content polypropylene resin and the preparation method thereof, the polypropylene is treated by adopting the fluidized drying bed, the content of total volatile organic compounds in a polypropylene material is remarkably reduced, and the problem of residues of volatile organic compounds in the polypropylene resin is solved.

Description

technical field [0001] The invention belongs to the field of polypropylene resins, and more specifically relates to a method for preparing polypropylene resin with low VOC content and the polypropylene resin with low VOC content prepared by the method. Background technique [0002] Polypropylene (PP) has been widely used in various fields because of its excellent comprehensive properties, wide range of sources, high quality and low price. However, the existing polypropylene materials and products all have the problems of releasing volatile organic compounds (VOC) to pollute the environment and endanger people's health in varying degrees, which largely limits the use of polypropylene materials in high-end automobiles with high environmental protection requirements. Applications in fields such as decorative parts, medical and food packaging materials. Therefore, the research and development of environmentally friendly low-VOC polypropylene resin and materials can expand the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/06B29B9/12B29B13/06B29K23/00
CPCB29B9/06B29B9/12B29B13/065B29K2023/12
Inventor 康鹏金滟蔡涛石胜鹏
Owner CHINA PETROLEUM & CHEM CORP
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