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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  • 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 s

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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Example Embodiment

[0023] Example 1

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

[0025] (1) Dissolve 20 g of benzyl bromide in 20 mL of absolute ethanol and stir to obtain about 34 mL of solution A; dissolve polyhexamethylene monoguanidine phosphate in water and stir evenly to obtain polyhexamethylene mono Solution B with 20% guanidine phosphate mass fraction;

[0026] (2) Under the conditions of controlling the temperature of solution B at 50°C and controlling the stirring speed at 300 rpm, 34mL of solution A was added dropwise to 100mL of solution B within 30 minutes to produce solid insolubles;

[0027] (3) The solid insoluble matter is separated and dried in vacuum at 60° C. to obtain a modified polyguanidine salt antibacterial and antifungal agent with pendant benzene ring groups.

[0028] Applying the modified polyguanidine salt antibacterial and antifungal agent prepared in this embodiment to a silicone structural...

Example Embodiment

[0031] Example 2

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

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

[0034] (2) Under the conditions of controlling the temperature of solution B at 80°C and controlling the stirring speed at 350 rpm, 58.2 mL of solution A was added dropwise to 250 mL of solution B within 30 minutes to produce solid insolubles;

[0035] (3) The solid insoluble matter is separated and dried in vacuum at 60° C. to obtain a modified polyguanidine salt antibacterial and antifungal agent with pendant benzene ring groups.

[0036] Applying the modified polyguanidine salt antibacterial and antifungal agent prepared in this embodiment to a silicon...

Example Embodiment

[0039] Example 3

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

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

[0042] (2) Under the conditions of controlling the temperature of solution B at 80°C and controlling the stirring speed at 500 rpm, 40.8 mL of solution A was added dropwise to 100 mL of solution B within 60 minutes to produce solid insolubles;

[0043] (3) The solid insoluble matter is separated and dried in vacuum at 60° C. to obtain a modified polyguanidine salt antibacterial and antifungal agent with pendant benzene ring groups.

[0044] Applying the modified polyguanidine salt antibacterial and antifungal agent prepared in this embodiment to a sil...

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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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