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Low-VOC polypropylene composition and preparation method thereof

A polypropylene composition and polypropylene technology, applied in the field of polypropylene composition, can solve the problems of heat volatilization of repellent, reduction of effective time, low devolatilization efficiency, etc., and achieve the goal of reducing VOC content, improving dispersion effect, and improving efficiency Effect

Active Publication Date: 2014-04-09
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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  • Low-VOC polypropylene composition and preparation method thereof
  • Low-VOC polypropylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1~12

[0033] Polypropylene powder (092B, produced by the pilot test base of Sinopec Beijing Research Institute of Chemical Industry), fully vulcanized powdered silicone rubber (VP-602, with an average particle size of 0.1 μm, produced by the pilot test base of Sinopec Beijing Research Institute of Chemical Industry), antioxidant ( Irganox1010 and Irgafos168 are mixed at a weight ratio of 1:1) into a high-speed mixer and stirred at a speed of 300 rpm for 3 minutes to fully mix the components; then the above premixed materials and stripping agent (both Commercially available) were added from the main feed inlet and liquid inlet respectively, passed through the BUSS mixing unit (MKD-30, Swiss BUSS company) in the range of 190 ° C ~ 220 ° C, and melted under the condition of maintaining a vacuum degree of -0.08 MPa Blending, extruding and granulating to obtain a polypropylene composition with low VOC content. The total weight of the antioxidant in the specific formula is 0.2 parts by we...

Embodiment 13

[0036] Put the same polypropylene powder, antioxidant, stripping agent, and fully vulcanized powder silicone rubber into a high-speed mixer together with Example 4, and stir for 3 minutes at a speed of 300 rpm to fully mix the components uniform. Then, the above-mentioned mixed materials are passed through the BUSS mixing unit in the range of 190°C to 220°C, and extruded and granulated under the condition of maintaining a vacuum degree of -0.08MPa to obtain a low-VOC polypropylene composition. The total weight of the antioxidant in the specific formula is 0.2 parts by weight based on 100 parts by weight of polypropylene, and the content of each component is shown in Table 1, all by parts by weight.

Embodiment 14~25

[0038] Polypropylene resin (K9026, Sinopec Yanshan Branch), fully vulcanized powdered silicone rubber (VP-602, average particle size 0.1 μm, Sinopec Beijing Research Institute of Chemical Industry), antioxidants (Irganox1010 and Irgafos168 in a weight ratio of 1 :2 mixing) into a high-speed mixer, stirring at a speed of 300 rpm for 3 minutes to fully mix the components; Injection port and liquid inlet, through the BUSS mixing unit (MKD-30, Swiss BUSS company) within the range of 190 ° C ~ 220 ° C, extrusion granulation under the condition of maintaining a vacuum of -0.08MPa, to obtain low VOC content polypropylene composition. The total weight of the antioxidant in the specific formula is 0.3 parts by weight based on 100 parts by weight of polypropylene, and the content of each component is shown in Table 1, all by parts by weight.

[0039] The extruded pellets were dried in a constant temperature oven at 80°C for 2 hours, and the TVOC was tested according to the standard VDA...

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Abstract

The invention relates to a low-VOC polypropylene composition and a preparation method thereof. The polypropylene composition is obtained through the melt blending of polypropylene, full-vulcanized silicone rubber powder, a striping agent and antioxidant, wherein the weight parts of the full-vulcanized silicone rubber powder, the striping agent and the antioxidant are 0.05-2, 0.2-2.0 and 0.1-0.5 respectively when the weight part of the polypropylene is 100; the average particle size of the full-vulcanized silicone rubber powder is 0.05-1mum, and the gel content of the full-vulcanized silicone rubber powder is 60wt% or more; and the stripping agent is a liquid at normal temperature, and has a boiling point of 70-170DEG C under normal pressure. The addition of the full-vulcanized silicone rubber powder, the compound antioxidant and the stripping agent substantially reduces the content of total volatile organic compounds in polypropylene and solves the residual problem of the volatile organic compounds in the polypropylene composition.

Description

technical field [0001] The present invention relates to a polypropylene composition, more specifically, to a low-VOC polypropylene composition and a preparation method thereof. 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. Therefore, the research and...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08L83/04C08K5/05C08K5/5419C08K5/5425
CPCC08L23/12C08L83/04C08K3/18C08K5/05C08K5/5419
Inventor 康鹏金滟蔡涛丁树岩孙姝琦石胜鹏刘善元张静
Owner CHINA PETROLEUM & CHEM CORP
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