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A kind of antibacterial polypropylene resin and its preparation method and application

A polypropylene resin and polypropylene technology, applied in the field of polypropylene resin with antibacterial function and its preparation, can solve the problems of adverse effects of antibacterial agents, loss of antibacterial components, affecting long-term antibacterial performance of products, etc., to avoid the decline of antibacterial performance, The effect of long-lasting antibacterial function

Active Publication Date: 2019-02-05
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the above methods are to add antibacterial substances into the polypropylene substrate by physical mixing method. Since there is no chemical bond between the antibacterial molecules and the polypropylene substrate, the uniformity of antibacterial agent dispersion is not easy to ensure, and it is also difficult to Avoid the loss of antibacterial ingredients, which directly affects the long-term antibacterial performance of the product
[0003] In addition, the oozing antimicrobial agents also have more or less adverse effects on humans and the environment

Method used

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  • A kind of antibacterial polypropylene resin and its preparation method and application
  • A kind of antibacterial polypropylene resin and its preparation method and application
  • A kind of antibacterial polypropylene resin and its preparation method and application

Examples

Experimental program
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Effect test

preparation example Construction

[0043] Preparation of modified triclosan

[0044] (1) After vacuuming 14.5 g of triclosan to remove the water and oxygen adsorbed in the raw materials, dissolve it in 80 mL of dichloromethane, and add 10 mL of triethylamine. Under a nitrogen atmosphere, 7.2 mL of methacryloyl chloride (prepared as a solution with dichloromethane) was gradually added dropwise to the above triclosan solution, and the reaction was stirred at room temperature for 4 hours. After the reaction, low-boiling liquids such as dichloromethane, excess acryloyl chloride, triethylamine, etc. were removed by distillation under reduced pressure. Finally, the remaining triethylamine in the product was neutralized with an aqueous hydrochloric acid solution until the pH of the solution was neutral, and the washing liquid was separated and water removed to obtain 4.3 g of modified triclosan A.

[0045] The structural formula of modified triclosan A is Where X has the structure shown in formula (I), R 1 For methyl.

[...

Embodiment 1

[0053] In parts by mass, 100 parts of polypropylene, 0.1 part of antioxidant 1010, 0.1 part of antioxidant 168, 0.1 part of initiator dicumyl peroxide, and 5 parts of modified triclosan A are mixed to obtain a mixture. The mixture was then fed into a twin-screw extruder for melting. The temperature of the melting section of the extruder is 160°C, the temperature of the reaction section is 190°C, the temperature of the melt conveying section is 200°C, the temperature of the discharge port is 180°C, the screw setting speed is 150rpm, and the extruded product is cooled in a circulating water bath. Pellet to obtain the product.

[0054] After the product is fully dissolved in xylene, the polymer powder is precipitated. The product is filtered and washed with ethanol to remove the unreacted modified triclosan A. The modified polypropylene resin with the triclosan functional group chemically bonded to the polypropylene resin is obtained. The mass content of Cl in the modified polyprop...

Embodiment 2

[0056] In parts by mass, 100 parts of polypropylene, 0.1 part of antioxidant 1010, 0.1 part of antioxidant 168, 0.1 part of initiator dicumyl peroxide, and 10 parts of modified triclosan A are mixed to obtain a mixture. The mixture was then fed into a twin-screw extruder for melting. The temperature of the melting section of the extruder is 160°C, the temperature of the reaction section is 190°C, the temperature of the melt conveying section is 200°C, the temperature of the discharge port is 180°C, the screw setting speed is 150rpm, and the extruded product is cooled in a circulating water bath. Pellet to obtain the product.

[0057] After the product is fully dissolved in xylene, the polymer powder is precipitated. The product is filtered and washed with ethanol to remove the unreacted modified triclosan A. The modified polypropylene resin with the triclosan functional group chemically bonded to the polypropylene resin is obtained. The mass content of Cl in the modified polypro...

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Abstract

The invention discloses a modified polypropylene resin, which is characterized in that it has the following structure: PP-g-T wherein, PP is polypropylene, and T is modified triclosan; the number-average molecular weight of the modified polypropylene resin is 5000-2 million. Also disclosed is a preparation method of the modified polypropylene resin, which uses polypropylene, modified triclosan, an initiator, and a heat stabilizer as raw materials and is prepared by a melt grafting method; the polypropylene and modified triclosan The mass ratio of the polypropylene to the heat stabilizer is 99.9:0.1 to 70:30; the mass ratio of the polypropylene to the heat stabilizer is 100:0.1 to 100:1; the mass ratio of the polypropylene to the initiator is 100:0.01 to 100:1 . In the modified polypropylene resin prepared by the present invention, the triclosan functional structure is chemically bonded in the polypropylene resin molecule, which has a durable antibacterial function. In use, it is blended with conventional polypropylene resin or sprayed with triclosan Compared with the method of antibacterial agent, the advantage is that the triclosan component does not lose, which can avoid the decline of the antibacterial performance of the polypropylene resin, and will not pollute the environment.

Description

Technical field [0001] The invention relates to the technical field of polypropylene resins, in particular to a polypropylene resin with antibacterial function and a preparation method thereof. Background technique [0002] Polypropylene materials are widely used in production and life fields such as water pipelines, home appliances, medical equipment, toys, etc. With the gradual improvement of people’s awareness of health and environmental protection, the requirements for the cleanliness of these products are also increasing, especially in In the field of medical devices (such as artificial patch materials made of polypropylene resin, surgical sutures, etc.), how to avoid infections caused by materials is one of the problems encountered in clinical applications. As polypropylene itself does not have the function of antibacterial and anti-mildew, people usually blend polypropylene with antibacterial agents, or attach antibacterial agent molecules to the surface of polypropylene m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/06C08F255/02C08F220/30C08F216/36C08F222/20
CPCC08F255/02C08L51/06C08F220/301C08F222/20
Inventor 牛慧李定果李腾伟谭文豪李杨刘心志王爱慧
Owner DALIAN UNIV OF TECH