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Aqueous self-crosslinking cationic copolymer emulsion and its preparation method and application

A technology of cationic copolymers and cationic emulsifiers, applied in the field of coatings, can solve problems such as short aging and short antibacterial aging

Active Publication Date: 2021-06-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the shortcomings of metal ion antibacterial agents and small molecule antibacterial agents, such as short timeliness
Because it is antibacterial on the molecular structure, it is not easy to come out, which solves the problem of short antibacterial time limit

Method used

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  • Aqueous self-crosslinking cationic copolymer emulsion and its preparation method and application
  • Aqueous self-crosslinking cationic copolymer emulsion and its preparation method and application
  • Aqueous self-crosslinking cationic copolymer emulsion and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Using the polymerization process combining seed emulsion method and semi-continuous pre-emulsification method, under nitrogen atmosphere, 30g deionized water, 0.05g cationic emulsifier cetyltrimethylammonium bromide, 0.15g nonionic emulsifier PE6100, 0.05g of pH buffer, 0.1g of methacryloxyethyl dimethyl butyl ammonium bromide, 0.1g of vinyltriethoxysilane, 1.8g of methyl methacrylate, 3.2g of butyl acrylate were added Into the reaction kettle, start stirring for standby;

[0032] Add the remaining 100g of deionized water, 3.2g of emulsifier, 0.25g of pH buffer, 5g of cationic monomer, 4.2g of self-crosslinking monomer, and acrylate monomer into the emulsification kettle, start stirring, emulsify for 0.5h, and set aside ;

[0033] The temperature of the reactor was raised to 80°C, and 0.075 g of azobisisobutylamidine hydrochloride was added to initiate polymerization. After 30 minutes of reaction, the emulsion turned blue. At the same time, drop the emulsion in the em...

Embodiment 2

[0035] Using the polymerization process combining seed emulsion method and semi-continuous pre-emulsification method, under nitrogen atmosphere, 50g deionized water, 0.1g cationic emulsifier cetyltrimethylammonium bromide, 0.1g nonionic emulsifier PE6100, 0.1g of pH buffer, 0.3g of methacryloxyethyl dimethyl butyl ammonium bromide, 0.2g of vinyltriethoxysilane, 2.2g of methyl methacrylate, 2.8g of butyl acrylate were added Into the reaction kettle, start stirring for standby;

[0036] Add the remaining 100g of deionized water, 3.5g of emulsifier, 0.3g of pH buffer, 8g of cationic monomer, 4g of self-crosslinking monomer, and acrylate monomer into the emulsification kettle, start stirring, emulsify for 0.75h, and set aside;

[0037] The temperature of the reactor was raised to 60°C, and 0.15 g of azobisisobutylamidine hydrochloride was added to initiate polymerization. After 30 minutes of reaction, the emulsion turned blue. At the same time, dropwise add the emulsion in the em...

Embodiment 3

[0039] Using the polymerization process combining seed emulsion method and semi-continuous pre-emulsification method, under nitrogen atmosphere, 72g deionized water, 0.15g cationic emulsifier dodecyltrimethylammonium bromide, 0.05g nonionic emulsifier PE6100, 0.1g of pH buffer, 0.5g of methacryloxyethyldimethylbutylammonium bromide, 0.3g of vinyltriethoxysilane, 3.3g of methyl methacrylate, and 1.7g of butyl acrylate were added Into the reaction kettle, start stirring for standby;

[0040] Add the remaining 80g of deionized water, 2.8g of emulsifier, 0.3g of pH buffer, 9g of cationic monomer, 2g of self-crosslinking monomer, and acrylate monomer into the emulsification kettle, start stirring, emulsify for 1 hour, and set aside.

[0041] The temperature of the reactor was raised to 75°C, and 0.3 g of azobisisobutylamidine hydrochloride was added to initiate polymerization. After 30 minutes of reaction, the emulsion turned blue. At the same time, dropwise add the emulsion in th...

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Abstract

The invention discloses a water-based self-crosslinking cationic copolymer emulsion, a preparation method and application thereof, and belongs to the field of coatings. The invention uses cationic polymerizable functional monomers and acrylate monomers as comonomers and adds self-crosslinking monomers to obtain aqueous self-crosslinking cationic copolymer emulsion. The introduction of positively charged functional monomers and self-crosslinking monomers through copolymerization enables the polymer emulsion to obtain good stability, long-lasting anti-mold performance and good substrate adhesion. The synthesized high glass transition temperature self-crosslinking cationic copolymer emulsion and low glass transition temperature self-crosslinking cationic copolymer emulsion are mixed in proportion as film-forming substances to prepare water-based antibacterial coatings, without adding film-forming aids, and can be formed at room temperature. The film and coating have excellent adhesion, the water resistance of the coating film exceeds 50 days, the scrubbing resistance exceeds 20,000 times, the anti-mildew test reaches level 0, and the antibacterial rate is >99.99%.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a water-based self-crosslinking cationic copolymer emulsion and a preparation method and application thereof. Background technique [0002] Due to the indoor high-temperature and high-humidity environment, it is easy to breed bacteria and mold on the surface of the coating, resulting in mildew spots and peeling of the coating, which reduces the service life of the coating and affects the appearance and comfort. Due to the growth of bacteria and mold, the spores of the mold will float in the air and pollute the indoor air. The musty smell of the wall will also make the occupants unbearable, and even cause allergies and diseases, endangering human health. [0003] At present, the common antibacterial coatings mostly add metal ion or organic small molecule antibacterial agents to the coating to achieve the antibacterial purpose of the coating. Small molecules of this kind of coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/34C08F230/08C08F220/18C08F220/14C08F220/10C08F2/28C08F2/30C09D143/04C09D5/14
CPCC08F2/28C08F2/30C08F220/18C08F220/34C08L2205/025C09D5/14C09D143/04C08F220/1804C08L43/04C08F230/08C08F220/14C08F220/10
Inventor 李效玉张译文邱藤
Owner BEIJING UNIV OF CHEM TECH