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Modified polyguanidine salt antibacterial and mildew-proof agent, preparation method thereof and application thereof in silicone structural sealant

An antibacterial and antifungal agent and sealant technology, which is applied in the direction of adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problems of mold and mildew prevention time, etc., and achieve good precipitation resistance, low cost, and simple preparation process Effect

Active Publication Date: 2020-07-10
安阳崇高纳米材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of poor antibacterial and mildew resistance and poor durability of the existing antibacterial and antifungal agents, a modified polyguanidine salt antibacterial and antifungal agent and its preparation method are provided; in order to solve the practical application process of the preparation of silicone structural sealants Mold problem and the technical problem of short mold proof time, and provide a kind of application of modified polyguanidine salt antibacterial and antifungal agent in silicone structural sealant

Method used

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  • Modified polyguanidine salt antibacterial and mildew-proof agent, preparation method thereof and application thereof in silicone structural sealant
  • Modified polyguanidine salt antibacterial and mildew-proof agent, preparation method thereof and application thereof in silicone structural sealant
  • Modified polyguanidine salt antibacterial and mildew-proof agent, preparation method thereof and application thereof in silicone structural sealant

Examples

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Effect test

Embodiment 1

[0024] A preparation method of a modified polyguanidine salt antibacterial and antifungal agent, comprising the steps of:

[0025] (1) Dissolve 20g of benzyl bromide in 20mL of absolute ethanol, stir well to obtain about 34mL of solution A; dissolve polyhexamethylene monoguanidine phosphate in water, stir well to obtain polyhexamethylene monoguanidine phosphate Guanidine phosphate mass fraction is solution B of 20%;

[0026] (2) Under the conditions of controlling the temperature of solution B to 50°C and controlling the stirring speed to 300rpm, add 34mL of solution A to 100mL of solution B dropwise within 30min to produce solid insoluble matter;

[0027] (3) Separating the solid insolubles and vacuum drying at 60° C. to obtain a modified polyguanidine salt antibacterial and antifungal agent with side chains grafted with benzene ring groups.

[0028] Apply the modified polyguanidine salt antibacterial and antifungal agent prepared in this embodiment to the silicone structura...

Embodiment 2

[0032] A preparation method of a modified polyguanidine salt antibacterial and antifungal agent, comprising the steps of:

[0033] (1) Dissolve 20g of benzyl chloride in 40mL of absolute ethanol, stir well to obtain about 58.2mL of solution A; dissolve polyhexamethylene monoguanidine hydrochloride in water, stir well to obtain polyhexamethylene The mass fraction of monoguanidine hydrochloride is 50% solution B;

[0034] (2) Under the conditions of controlling the temperature of solution B to 80°C and controlling the stirring speed to 350rpm, add 58.2mL of solution A to 250mL of solution B dropwise within 30min to produce solid insoluble matter;

[0035] (3) Separating the solid insolubles and vacuum drying at 60° C. to obtain a modified polyguanidine salt antibacterial and antifungal agent with side chains grafted with benzene ring groups.

[0036] Apply the modified polyguanidine salt antibacterial and antifungal agent prepared in this embodiment to the silicone structural s...

Embodiment 3

[0040] A preparation method of a modified polyguanidine salt antibacterial and antifungal agent, comprising the steps of:

[0041] (1) Dissolve 30g of benzyl bromide in 20mL of absolute ethanol, stir well to obtain about 40.8mL of solution A; dissolve polyhexamethylene monoguanidine hydrochloride in water, stir well to obtain polyhexamethylene The mass fraction of monoguanidine hydrochloride is 20% solution B;

[0042] (2) Under the conditions of controlling the temperature of solution B to 80°C and controlling the stirring speed to 500rpm, add 40.8mL of solution A to 100mL of solution B dropwise within 60min to produce solid insoluble matter;

[0043] (3) Separating the solid insolubles and vacuum drying at 60° C. to obtain a modified polyguanidine salt antibacterial and antifungal agent with side chains grafted with benzene ring groups.

[0044]Apply the modified polyguanidine salt antibacterial and antifungal agent prepared in this embodiment to the silicone structural sea...

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Abstract

The invention relates to a modified polyguanidine salt antibacterial and antifungal agent, a preparation method thereof and an application thereof in a silicone structural sealant, and the preparationmethod comprises the following steps: dissolving a benzyl halide compound in absolute ethyl alcohol, and gradually dropwise adding the benzyl halide compound into a heated polyguanidine salt aqueoussolution to prepare the modified polyguanidine salt antibacterial and antifungal agent with better precipitation resistance and side chain grafted benzene ring groups; applying the material in the preparation process of the silicone structural sealant, adding the material and other raw materials together so that the material is uniformly dispersed in the silicone structural sealant, and then preparing the long-acting antibacterial mildew-proof silicone structural sealant. The modified polyguanidine salt antibacterial and mildew-proof agent and the silicone structural sealant prepared by the invention have killing and inhibiting effects on common bacteria and mildew, can prolong the service life of the sealant to a certain extent, and are simple and convenient in preparation process, green,environment-friendly, low in cost and suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a modified polyguanidine salt antibacterial and antifungal agent, a preparation method thereof and an application in silicone structural sealants. Background technique [0002] At present, silicone sealants occupy a major position in the field of interior decoration, especially in humid environments such as kitchens, bathrooms, and toilets. Microorganisms such as bacteria and mold are easy to breed and reproduce in a humid and hot environment, which will cause mildew in the sealant. Blackening will affect the aesthetics and hygiene and safety of interior decoration. Severe contamination by microorganisms such as bacteria and mold may even cause the sealant to fall off, lose its waterproof sealing function, and damage the overall interior decoration. According to GB / T1741-2007 "Determination of Mold Resistance of Paint Films", the anti-mold sealants on the market wer...

Claims

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Application Information

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IPC IPC(8): C08G73/00C09J183/04C09J11/08
CPCC08G73/00C09J183/04C09J11/08C08L2205/03C08L2205/025C08L79/00C08L83/04
Inventor 李燕新魏静静李毕忠彭红芳
Owner 安阳崇高纳米材料科技有限公司
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