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Antibacterial modifier and preparation method thereof, antibacterial modified thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer and modifier technology, applied in the field of antibacterial modified thermoplastic elastomer and its preparation, antibacterial modifier and its preparation, can solve the problems of poor antibacterial durability, macrocytotoxicity, poor antibacterial effect, etc. Long-lasting antibacterial properties, no toxic side effects, no environmental effects

Active Publication Date: 2020-07-28
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the antibacterial materials provided by these solutions have poor antibacterial effect and poor antibacterial persistence. In addition, the addition of small molecule silver-containing antibacterial agents also produces greater cytotoxicity, which is not suitable for application in the field of medical devices

Method used

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Examples

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Effect test

preparation example Construction

[0033] The invention also provides a preparation method of the antibacterial modifying agent, comprising: mixing polyguanidine salt aqueous solution and fatty acid salt aqueous solution to form polyguanidine salt-fatty acid salt complex.

[0034] Wherein, the polyguanidine salt in the polyguanidine salt aqueous solution, the type, ratio, source, etc. of the fatty acid salt in the fatty acid salt aqueous solution are all consistent with those described in the above-mentioned technical scheme, and will not be described here one by one. repeat.

[0035]In the present invention, the mass percent concentration of the polyguanidine salt aqueous solution is preferably 0.1%-5%, more preferably 0.5%-3%. In the present invention, the concentration of the fatty acid salt aqueous solution is preferably 0.1%-5%, more preferably 0.5%-3%. Controlling the concentrations of the two solutions within the above range can make the two salts have good water solubility, and make the polyguanidine-f...

Embodiment 1

[0047] Preparation concentration is 2.0% polyhexamethylene biguanide hydrochloride aqueous solution (the number average molecular weight of polyhexamethylene biguanide hydrochloride is 533) and the sodium stearate aqueous solution that concentration is 2.0%, according to polyhexamethylene biguanide Methyl biguanide hydrochloride: sodium stearate = 1:1 mass ratio, mix the above two solutions at room temperature, quickly form a water-insoluble precipitate, after centrifugation, wash three times with water and dry to obtain polyhexamethylene Biguanide hydrochloride-sodium stearate complex antibacterial modifier.

[0048] Take 10g of the above-mentioned antibacterial modifier and 990g of polyurethane TPU (type BASF 1180A, melt index of 15g / 10min, test conditions: 10kg, 190°C), mix evenly in a high-speed mixer, and melt in a twin-screw extruder Extrusion, the extrusion temperature is 200°C, the screw speed is 130rpm, and the material residence time is 1.5min. After melt extrusion, ...

Embodiment 2

[0050] Preparation concentration is 1.5% polyhexamethylene monoguanidine phosphate aqueous solution (the number average molecular weight of polyhexamethylene monoguanidine phosphate is 241) and concentration is 1.5% potassium stearate aqueous solution respectively, according to polyhexamethylene Methyl monoguanidine phosphate: Potassium stearate = 1:1 mass ratio Mix the above two solutions at room temperature, quickly form a water-insoluble precipitate, after centrifugation, wash three times with water and dry to obtain polyhexamethylene Monoguanidine phosphate-potassium stearate complex antibacterial modifier.

[0051] Get 15g of the above-mentioned antibacterial modifier and 985g polyolefin elastomer (styrene-ethylene-butylene-styrene block copolymer SEBS, its melt index is 55g / 10min, test condition is: 5kg, 200 ℃), at high After mixing evenly in the blender, it is melt-extruded in a twin-screw extruder. The extrusion temperature is 180°C, the screw speed is 100rpm, and the ...

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Abstract

The invention provides an antibacterial modifier and a preparation method thereof, an antibacterial modified thermoplastic elastomer and a preparation method thereof. The antibacterial modifier provided by the invention is a polyguanidine-fatty acid salt complex formed by combining polyguanidine salt and fatty acid salt. The antibacterial modifier provided by the present invention has good compatibility with the thermoplastic elastomer matrix, is uniformly dispersed, is not easy to precipitate, has good antibacterial property and long-lasting antibacterial performance, and can significantly improve the antibacterial efficiency; in addition, the antibacterial modifier is resistant to high temperature and can avoid Side reactions such as pyrolysis occur in the process of preparing the antibacterial material, thereby avoiding the problem of antibacterial inactivation; moreover, the antibacterial agent has no toxic and side effects, and can be better used in the field of medical devices. In addition, the preparation method is simple and easy, has no pollution to the environment, and is easy to realize large-scale continuous production.

Description

technical field [0001] The invention relates to the technical field of thermoplastic materials, in particular to an antibacterial modifier and a preparation method thereof, an antibacterial modified thermoplastic elastomer and a preparation method thereof. Background technique [0002] Thermoplastic elastomer (Thermoplastic elastomer, TPE) is a kind of polymer material that shows rubber elasticity at room temperature and can be plasticized at high temperature. And the rubber segment (that is, the elastic soft segment). Compared with rubber, TPE does not need to be vulcanized, and can be processed by injection molding or extrusion of thermoplastics, and can even be secondary injection molded on some substrates, which simplifies the production process and reduces costs. In addition to the advantages of the above-mentioned processing properties, TPE also has superior chemical, physical and biological properties, such as good oxidation resistance, wide hardness range, non-toxic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L79/00C08K5/098C08L53/02C08L77/00
CPCC08L53/025C08L75/04C08L77/00C08L2207/04C08L79/00C08K5/098
Inventor 石恒冲栾世方陈家悦殷敬华于欢杨华伟闫顺杰宋凌杰周容涛
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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