A kind of inorganic composite guanidine salt polymer anti-harmful microorganism material and preparation method thereof

A technology of guanidine salt polymer and compound guanidine salt, applied in the field of materials, can solve the problems of increasing enterprise cost, difficult loss of guanidine salt polymer, loss of antibacterial properties, etc., to achieve efficient antibacterial properties, no bacterial resistance, wide spectrum antibacterial effect

Active Publication Date: 2022-05-20
SHANGHAI YUCHENG POLYMER MATERIAL CO LTD
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Problems solved by technology

Since the guanidine group is a hydrophilic group, most guanidinium salt polymers have strong water solubility. At present, the aqueous solution of guanidinium salt polymers is mainly used for surface disinfection treatment of products and post-antibacterial finishing of textiles. The blending modification of guanidinium salt polymers with plastics or rubber will cause the product to gradually lose antibacterial properties due to poor water resistance because it is soluble in water; therefore, how to improve the water resistance of rubber and plastic products containing guanidinium salt polymers, and at the same time Keeping the advantages of the guanidinium salt polymer against harmful microorganisms is a topic worthy of research. Patents CN1445270A, CN106800652A, and CN1569923A describe that the chemical bond formed by chemical reaction will firmly combine the guanidinium-containing polymer with the matrix resin molecule. The antibacterial masterbatch is obtained, and then used to prepare antibacterial plastics, so that the guanidinium salt polymer is not easy to lose, thereby endowing the material with durable antibacterial properties. However, this kind of antibacterial masterbatch is first prepared by chemically bonding the guanidine-containing polymer with the matrix resin. , and then added to the rubber and plastic raw materials that need antibacterial modification, the type of matrix resin for preparing antibacterial masterbatch will change with the different rubber and plastic raw materials for antibacterial modification, so it is required that the antibacterial masterbatch prepared should be more targeted , there will be more varieties and grades, which will increase the cost of the enterprise

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  • A kind of inorganic composite guanidine salt polymer anti-harmful microorganism material and preparation method thereof

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preparation example Construction

[0033] The present invention also provides a preparation method of an inorganic composite guanidinium salt polymer anti-harmful microorganism material, comprising the following steps:

[0034]S1: Mix the inorganic powder functionalized with epoxy group, guanidinium salt polymer, polyether polyol and methyl silicone oil evenly. Under the protection of inert gas, raise the temperature and stir to melt the polymer material and mix with epoxy group Mix the group-functionalized inorganic powder evenly, and react at 100-200°C for 30 minutes to 8 hours, and chemical grafting reaction modification occurs on the surface of the epoxy-functionalized inorganic powder (the surface is chemically bonded into a band resistant guanidinium salt polymers with functional groups harmful to microorganisms);

[0035] S2: After the step S1 reaction finishes, the product in molten state is cooled to room temperature, and then the cooled solid product is pulverized;

[0036] S3: The product of step S2...

Embodiment 1

[0042] Add 100g of fumed silica that has been pre-dried at 120°C for 5 hours to 3000ml of anhydrous ethanol aqueous solution (mass ratio of absolute ethanol:distilled water is 3:1), and adjust the pH value to 4~ with hydrochloric acid. 5. Start stirring and assist the ultrasonic environment to make it uniformly dispersed for 30 minutes, then slowly drop 20g of γ-glycidyl etheroxypropyl trimethoxysilane (CAS No.: 2530-83-8), and then heat up to 70°C. After stirring at constant temperature for 10 hours, suction filter the suspension of white carbon black, wash it with absolute ethanol for 3 times, dry and grind to obtain epoxy group functionalized white carbon black and store it for later use. Hourly high temperature test, the weight loss rate is 10.2%;

[0043] With the white carbon black of 60g epoxy group functionalization prepared above, 75g polyhexamethylene guanidine hydrochloride (average molecular weight 10000), 10g polyoxypropylene triol (hydroxyl value 53~59) and 5g me...

Embodiment 2

[0046] Pretreat diatomite (average particle size 20 μm) at 250°C for 4 hours, cool to room temperature, weigh 100 g of diatomite, and add it to a mixed solution of 1000 ml of absolute ethanol / water (volume ratio 1:1), Add dilute acetic acid solution dropwise to make the pH of the mixture 4~5, start stirring and assist the ultrasonic environment to make it uniformly dispersed for 30 minutes, and gradually add 30g of γ-glycidyl etheroxypropyl triethoxysilane (CAS number: 2602- 34-8), then heated up to 70°C, stirred at constant temperature for 10 hours, filtered the diatomite suspension, washed 3 times with absolute ethanol, dried and ground to obtain diatoms functionalized with epoxy groups The soil was preserved for later use, and the sample was placed at 600°C for 5 hours to perform a high-temperature test with a weight loss rate of 7.3%.

[0047] Mix 65g of the epoxy functionalized diatomite prepared above, 70g polyhexamethyleneguanidine hydrochloride (average molecular weigh...

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Abstract

The invention discloses an inorganic composite guanidinium salt polymer anti-harmful microorganism material and a preparation method thereof. It is prepared from ether polyol and methyl silicone oil; among them, the mass ratio of inorganic powder to guanidinium salt polymer is 1:4-10:1; polyether polyol accounts for 3%-35% of the total mass of all materials; methyl silicone oil accounts for 0.5% to 10% of the total mass of all materials. The inorganic composite guanidinium salt polymer anti-harmful microbial material not only retains the thermal stability of the guanidinium salt polymer, but also has high-efficiency and broad-spectrum antibacterial properties, is safe, low-toxic, non-irritating, does not produce bacterial drug resistance, does not volatilize, does not It contains heavy metals and phenols, and has the advantages of no corrosion to various treated surfaces. It is also resistant to dissolution and washing, and can be directly added to different rubber and plastic materials.

Description

technical field [0001] The invention belongs to the field of materials, and relates to an inorganic composite guanidinium salt polymer anti-harmful microorganism material and a preparation method thereof. Background technique [0002] There are a large number of microorganisms in the living environment of human beings. There are many kinds of microorganisms, mainly including bacteria, fungi, viruses, etc. The microorganisms are small in shape, reproduce quickly, distribute widely, and easily mutate. Among them, some microorganisms are harmful to human health and the living environment. Therefore, in order to obtain a safe and healthy living environment and reduce the harm of harmful microorganisms to the human body, research and develop environmentally friendly, safe and hygienic anti-harmful microbial materials and their use in products The application of controlling the growth and reproduction of harmful microorganisms has been widely concerned. [0003] At present, the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C08L23/12C08L87/00
CPCC08G83/001C08L23/12C08L87/005Y02A50/30
Inventor 戴尧
Owner SHANGHAI YUCHENG POLYMER MATERIAL CO LTD
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