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Bactericidal diol chain extender, preparation method thereof and application of bactericidal diol chain extender in multifunctional synergistic anti-fouling waterborne polyurethane

A diol chain extender and bactericidal technology, which can be used in biocide-containing paints, antifouling/underwater coatings, polyurea/polyurethane coatings, etc. It can solve the problems of antifouling failure, fouling adhesion and proliferation, etc. Achieve the effects of reducing pollution, saving energy, and improving mechanical properties

Active Publication Date: 2022-01-25
GUANGZHOU MARITIME INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if the surface is both sterilizing and anti-adhesive, there will still be stains attached and proliferated for a long time, resulting in anti-fouling failure

Method used

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  • Bactericidal diol chain extender, preparation method thereof and application of bactericidal diol chain extender in multifunctional synergistic anti-fouling waterborne polyurethane
  • Bactericidal diol chain extender, preparation method thereof and application of bactericidal diol chain extender in multifunctional synergistic anti-fouling waterborne polyurethane
  • Bactericidal diol chain extender, preparation method thereof and application of bactericidal diol chain extender in multifunctional synergistic anti-fouling waterborne polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment provides a bactericidal diol chain extender, using dibromooctyl glycol and 1,2-benzisothiazol-3-one (BIT) for chemical reaction in a microwave reactor respectively, the specific process is as follows.

[0070] Add dibromooctyl glycol and 1,2-benzisothiazol-3-one (BIT) into the reaction flask at a molar ratio of 1.2:2.4, add methanol to dissolve, put it in a microwave reactor, and then heat to 52°C After constant temperature reaction for 12 hours, the resulting product was extracted with ethyl acetate, then dried with anhydrous magnesium sulfate, filtered and rotary evaporated to remove ethyl acetate, and then dried overnight at 45°C under vacuum to obtain a bactericidal diol chain extender, It is a nonionic antimicrobial diol chain extender.

Embodiment 2～6

[0072] Example 2-2 provides a series of cationic multifunctional synergistic anti-pollution polyurethane prepared by using the diol chain extender prepared in Example 1.

[0073] Specifically, the aqueous polyurethane emulsion was prepared by the following steps: respectively adding polyols I and II and diisocyanate into a double-neck flask equipped with mechanical stirring, and stirring and mixing at a temperature of 75° C. for 15 minutes (reaction stage 1). Then, add catalyst (2.5% mass fraction of reactant) and embodiment 1 obtained chain extender and MDEA to continue to react for 22 minutes (reaction stage 2). Subsequently, methyl ethyl ketone (MEK) with a solid content of 32% was added to reduce the viscosity of the system and the reaction was continued for 22 minutes. Then, when the temperature was cooled to room temperature, the system was neutralized with acetic acid for about 15 minutes. Finally, the mixture was emulsified with distilled water at 222 rpm for 22 minut...

Embodiment 7～8

[0084] Embodiments 7-8 provide a series of anionic multifunctional synergistic anti-pollution polyurethanes prepared by Embodiment 1

[0085] Specifically, the aqueous polyurethane emulsion was prepared by the following steps: respectively adding polyols I and II and TDI into a double-necked flask equipped with mechanical stirring, and stirring and mixing at a temperature of 22° C. for 32 minutes (reaction stage 1). Then, add the catalyst (2.5% mass fraction of the reactant) and the chain extender obtained in Example 1 and DMPA to continue the reaction for 15-32 minutes (reaction stage 2). Subsequently, methyl ethyl ketone (MEK) with a solid content of 32% was added to reduce the viscosity of the system and the reaction was continued for 22 minutes. Then, when the temperature was cooled to room temperature, the system was neutralized with triethylamine for about 22 minutes. Finally, the mixture was emulsified with distilled water at 422 rpm for 122 minutes (emulsification tim...

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Abstract

The invention provides a bactericidal diol chain extender. The structural formula of the chain extender is shown in the specification. The chain extender is prepared by the following steps: dissolving dibromo-octyl pentanediol and 1,2-benzisothiazole-3-ketone in a solvent, putting into a microwave reactor, reacting at 22222 DEG C for 2212 hours, and purifying to obtain the diol chain extender containing bactericidal groups, wherein the molar ratio of the dibromo-octyl pentanediol to the 1,2-benzisothiazole-3-ketone is 1.2 to 2.222.5. The invention also provides an application of the diol chain extender in multifunctional synergistic anti-fouling waterborne polyurethane. The bactericidal diol chain extender is applied to preparation of anti-fouling waterborne polyurethane, bactericidal groups are introduced into a coating through covalent bonds, compared with a release type anti-fouling coating, the environmental toxicity can be effectively reduced, and the prepared anti-fouling waterborne polyurethane can be widely applied to textile, plastic, medical treatment and public health and the like, especially the marine anti-fouling field; and on the other hand, the environment is not polluted, the production cost of the product can be reduced, and energy is saved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a bactericidal diol chain extender, a preparation method thereof and an application in multifunctional synergistic antifouling polyurethane. Background technique [0002] Biofouling substances such as proteins, cells, microorganisms, and aquatic organisms are easy to adhere and accumulate on the surfaces of daily necessities, building materials, biomedical materials, and marine equipment, which brings a series of problems to the medical and health, food, and shipping industries, seriously threatening human health and property safety. Among them, marine biofouling increases the navigation resistance of ships, blocks marine engineering facilities, and even causes local perforation and corrosion of substrates, affecting the service performance and service life of marine engineering facilities. In addition, in the process of cleaning up marine pollutants, it may also cau...

Claims

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Application Information

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IPC IPC(8): C08G18/32C08G18/38C08G18/12C09D175/04C09D5/14C09D5/16C07D275/04
CPCC08G18/3874C08G18/3817C08G18/3893C08G18/12C09D175/04C09D5/14C09D5/1662C07D275/04
Inventor 张怡尹衍升葛涛路金林张志斌
Owner GUANGZHOU MARITIME INST
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