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Water-based self-crosslinking cation copolymer emulsion as well as preparation method and application thereof

A cationic copolymer and self-crosslinking technology, which is applied in the field of coatings, can solve the problems of short antibacterial and antibacterial effects, and achieve the effects of improving water resistance and scrub resistance, reducing collisions, and inhibiting growth and reproduction

Active Publication Date: 2018-10-19
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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  • Water-based self-crosslinking cation copolymer emulsion as well as preparation method and application thereof
  • Water-based self-crosslinking cation copolymer emulsion as well as preparation method and application thereof
  • Water-based self-crosslinking cation copolymer emulsion as well as preparation method and application thereof

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 methacryloyloxyethyl dimethyl butyl ammonium 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. Add dropwise the emulsion in the emulsifica...

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Abstract

The invention discloses a water-based self-crosslinking cation copolymer emulsion as well as a preparation method and application thereof, and belongs to the field of paint. Cations can polymerize functional monomers, acrylate-type monomers are comonomers, and self-crosslinking monomers are added to obtain the water-based self-crosslinking cation copolymer emulsion. The functional monomers and theself-crosslinking monomers both with positive charges are introduced through copolymerization, and accordingly, the copolymer emulsion has high stability, long-lasting mildew resistance performance and high base material adhesion. A composited high-glass-transition-temperature self-crosslinking cation copolymer emulsion and a composited low-glass-transition-temperature self-crosslinking cation copolymer emulsion are mixed proportionally to serve as a film forming substance to prepare water-based antibacterial paint, addition of film forming aids is not needed, and films can be formed at the room temperature; adhesion force of coatings is excellent, water resistance of the films lasts more than 50 days, the films can resist more than twenty thousand times of scrubbing, mildew resistance reaches the zero level according to tests, and the bacteriostasis rate is higher than 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 Applications(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
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