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A kind of preparation method of low-voc polypropylene resin

A polypropylene resin and extraction technology, applied in the field of preparation of low-VOC polypropylene resin, can solve the problems of heating volatilization of repellent, reduction of effective time, reduction of VOC repelling effect, etc., and achieve the effect of simple and reliable operation process and low input cost

Active Publication Date: 2016-02-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for the repellant added by this method to be stably dispersed in the PP melt; and the three-stage vacuum reduces the effective time of the repellant in the system, and the devolatilization efficiency is not high; Unloading at the same feeding port of the machine will cause the repellant to be heated and volatilized in advance in the feeding section or solid conveying section, thereby further reducing its VOC removal effect

Method used

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  • A kind of preparation method of low-voc polypropylene resin
  • A kind of preparation method of low-voc polypropylene resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~12

[0025] The raw material polypropylene: polypropylene powder (092B, produced by the pilot test base of Beijing Research Institute of Chemical Industry) is ultrasonically extracted by an industrial ultrasonic cleaner (Kunshan Ultrasonic Instrument Co., Ltd.) in a water bath, and then the polypropylene powder is placed in a vacuum Vacuum drying in an oven to obtain dry polypropylene powder; then put the treated polypropylene powder and processing aids (antioxidant B225, BASF, Germany) into a high-speed mixer, at a speed of 300 rpm Stir for 3 minutes to fully mix the components; then add the above-mentioned mixture from the feed port, and pass through the BUSS mixing unit (MKD-30, Swiss BUSS company) in the range of 190 ° C to 220 ° C, while maintaining the vacuum Under the condition of -0.08MPa, the low-VOC polypropylene resin is obtained by melt blending, extruding and granulating. Its specific formula and process parameters are shown in Table 1, wherein the content of each comp...

Embodiment 13~24

[0035] The raw material polypropylene: polypropylene resin (K9026, Sinopec Yanshan Branch) was ultrasonically extracted by an industrial ultrasonic cleaner (Kunshan Ultrasonic Instrument Co., Ltd.) in a water bath, and then the polypropylene was vacuum-dried in an oven to obtain dry Polypropylene resin; Put the processed polypropylene resin and processing aid (antioxidant B225 with embodiment 1) etc. into the high-speed mixer afterwards, stir for 3 minutes at a speed of 300 rpm, and make each component Mix thoroughly and evenly; then add the above-mentioned mixed materials 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 melt together under the condition of maintaining a vacuum degree of -0.08 MPa. Mixing, extrusion and granulation to obtain low VOC polypropylene resin. Its specific formula and process parameters are shown in Table 2, wherein the content of each component is calculated in parts...

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Abstract

The invention provides a preparation method of a low-VOC polypropylene resin. The preparation method comprises a step that ultrasonic extraction pretreatment of a raw material polypropylene resin is carried out in a water bath at 40-120DEG C, wherein the sound frequency is 20-160KHz, and the sound power density is 0.35-5W / cm<2>. The ultrasonic pretreatment of the polypropylene resin substantially reduces the content of total volatile organic compounds (TVOCs) in a polypropylene material, and makes the TVOCs of the polypropylene resin to be lower than 50mug.C / g, so the residual problem of the VOCs in the polypropylene resin is solved.

Description

technical field [0001] The present invention relates to a kind of preparation method of polypropylene resin, more specifically, relates to a kind of preparation method of low-VOC polypropylene resin. Background technique [0002] Polypropylene (PP) has been widely used in various fields because of its excellent comprehensive properties, wide sources, high quality and low price. However, polypropylene is affected by factors such as catalysts and polymerization processes, oxide residues and short-chain oligomers, as well as the effects of various additives added in the subsequent modification process. Existing polypropylene materials and products have varying degrees of The release of volatile organic compounds (VOC) pollutes the environment and endangers people's health. This largely limits the application of polypropylene materials in the fields of high-end automotive interior parts, medical and food packaging materials with high environmental protection requirements. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/28C08L23/12
Inventor 金滟康鹏蔡涛杨芝超丁树岩张颖石胜鹏刘善元张静
Owner CHINA PETROLEUM & CHEM CORP
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