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Antibacterial and mildew-proof polypropylene composition, foamed sheet and preparation method thereof

A polypropylene composition, antibacterial and antifungal technology, applied in the field of antibacterial materials and their products, can solve the problems of poor product shape and particle size control, complicated process, cumbersome steps, etc., and achieve good antifungal effect and easy production operation Simple, uniform pore size distribution effect

Pending Publication Date: 2019-12-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] It can be seen from the above patent documents that the conditions for preparing guanidinium salt polymer powder in CN101037503A and CN1350022A are relatively harsh and the process is relatively complicated; in CN1445270A and US7282538B2, it is necessary to make guanidinium salt polymer into antibacterial masterbatch, the steps are cumbersome and the cost is high; CN102453315A and CN102453316A need to use sodium pyrithione, and the cost is relatively high; CN102453273A needs to operate at a certain temperature in the process of preparing antibacterial agent, the energy consumption is large, and the shape and particle size of the product after drying and crushing are not well controlled

Method used

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  • Antibacterial and mildew-proof polypropylene composition, foamed sheet and preparation method thereof
  • Antibacterial and mildew-proof polypropylene composition, foamed sheet and preparation method thereof
  • Antibacterial and mildew-proof polypropylene composition, foamed sheet and preparation method thereof

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preparation example Construction

[0035] According to the present invention, the preparation method of polypropylene base resin may comprise:

[0036] The first step: propylene homopolymerization reaction, including:

[0037] The first stage: under the action of a Ziegler-Natta catalyst comprising a first external electron donor, homopolymerization of propylene is carried out in the presence or absence of hydrogen to obtain a reaction stream comprising a first propylene homopolymer;

[0038] The second stage: add the second external electron donor to carry out the complexation reaction with the catalyst in the reaction stream, and then carry out the propylene homopolymerization reaction in the presence of the first propylene homopolymer and hydrogen to produce the second propylene homopolymerization to obtain a propylene homopolymer component comprising a first propylene homopolymer and a second propylene homopolymer;

[0039] Wherein, the melt index of the first propylene homopolymer and the propylene homopo...

Embodiment 1

[0117] (1) Preparation of guanidinium salt composite antibacterial agent

[0118] a, polyhexamethyleneguanidine hydrochloride (Shanghai Gaoju Industrial Co., Ltd.) 1000.0g is dissolved in water and is mixed with the aqueous solution of mass concentration 20%; It is the aqueous solution of 25% mass concentration that 50.0g zinc sulfate is mixed with, 125.0 The g styrene-butadiene latex solution was directly used after radiation crosslinking, and the concentration was 40%. b. Add the prepared guanidinium salt polymer aqueous solution into the container containing the zinc-containing aqueous solution, and stir while adding until uniformly mixed to form a transparent liquid mixture. c. Add the liquid mixture in step b to the latex solution, and stir while adding until the mixture is uniform. Then, add 5.0 g of anti-migration agent (Covestro 2794 XP). d. Dry the mixture obtained in step c with a spray dryer to obtain a solid powder; transfer the obtained solid powder to a high-s...

Embodiment 2

[0132] (1) Preparation of guanidinium salt composite antibacterial agent

[0133]a, polyhexamethylene guanidine propionate (Shanghai Gaoju Industrial Co., Ltd.) 1000.0g is dissolved in water and is mixed with the aqueous solution of mass concentration 40%; 100.0g zinc acetate is mixed with the aqueous solution that mass concentration is 15%, 150.0 The g nitrile latex solution was directly used after radiation crosslinking, and the concentration was 30%. b. Add the prepared guanidinium salt polymer aqueous solution into the container containing the zinc-containing aqueous solution, and stir while adding until uniformly mixed to form a transparent liquid mixture. c. Add the liquid mixture in step b into the latex solution, and stir while adding until the mixture is uniform. Then, 5.0 g of anti-migration agent (Covestro 2794 XP). d. The mixture obtained in step c is dried by a spray dryer to obtain a solid powder; the obtained solid powder is transferred to a high-speed mixer...

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Abstract

The invention belongs to the field of antibacterial materials and products thereof, and relates to an antibacterial mildew-proof polypropylene composition, a foamed sheet and a preparation method of the foamed sheet. The antibacterial and mildewproof polypropylene composition contains polypropylene base resin, a guanidine salt composite antibacterial agent, a mildewproof agent and an auxiliary agent, wherein the auxiliary agent contains a cell nucleating agent and an optional antioxidant; wherein based on 100 parts by weight of the polypropylene base resin, the content of the guanidine salt composite antibacterial agent is 0.05-2.0 parts by weight, the content of the mildew preventive is 0.01-5.0 parts by weight, the content of the cell nucleating agent is 0.01-10 parts by weight, and thecontent of the antioxidant is 0-8 parts by weight. The foamed sheet prepared from the antibacterial and mildew-proof polypropylene composition has the advantages of being antibacterial, mildew-proof,low in cost, compact in foam hole, uniform in pore size distribution, smooth in surface and the like.

Description

technical field [0001] The invention belongs to the field of antibacterial materials and products thereof, and more specifically relates to an antibacterial and antimold polypropylene composition, an antibacterial and antimold polypropylene foam board, and a preparation method for an antibacterial and antimold polypropylene foam board. Background technique [0002] Foamed sheets are widely used in containers, construction materials, auto parts, and impact energy absorbing materials, among others. Compared with polystyrene foamed sheets, polypropylene (PP) foamed sheets have excellent rigidity and thermal stability, and the demand for them has been increasing in recent years. Polypropylene foam sheets and plates are mainly obtained by extrusion foaming method, specifically, the mixing and melting of each foaming component is directly completed in the extruder, and the foaming process is completed by decomposing and overflowing the foaming agent at the head of the machine. . ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/16C08L79/00C08J9/10
CPCC08J9/103C08J2203/04C08J2323/12C08J2423/16C08J2479/00
Inventor 郭鹏吕明福徐耀辉张师军李杰张琦董穆尹华刘岳
Owner CHINA PETROLEUM & CHEM CORP
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