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A kind of high-performance soap-free fluorosilicone-acrylic latex paint and preparation method thereof

A technology of latex coating and fluorosilicone acrylic, applied in the direction of coating, etc., can solve the problems that the hydrophobic fluorine-containing segment is easily embedded, the performance improvement is limited, and the segment structure cannot be effectively controlled, and the structure of the emulsion film is dense and reactive. The effect of fast speed and controllable molecular weight growth

Active Publication Date: 2022-04-15
QUZHOU RES INST OF ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the above methods solve the problem of free small molecule emulsifiers, most of the methods used cannot effectively control the segment structure, and the hydrophobic fluorine-containing segment is still easily embedded, and the performance of the obtained latex after film formation is very limited.

Method used

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  • A kind of high-performance soap-free fluorosilicone-acrylic latex paint and preparation method thereof
  • A kind of high-performance soap-free fluorosilicone-acrylic latex paint and preparation method thereof
  • A kind of high-performance soap-free fluorosilicone-acrylic latex paint and preparation method thereof

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preparation example Construction

[0029] A kind of preparation method of high-performance soap-free fluorosilicone-acrylic latex coating of the present invention, comprises the following steps:

[0030] (1) Stir and dissolve 0.2-0.8 parts by weight of amphiphilic macromolecular reversible addition fragmentation chain transfer agent in 5-35 parts by weight of water to form a water phase, then add 0.9-10 parts by weight of hexafluorobutyl acrylate to raise the temperature To 60 ~ 80 ℃, keep stirring, nitrogen deoxygenation for more than 10 minutes. Add 0.001-0.02 parts by weight of initiator to the reaction system, and react for 1-3 hours to obtain R-AA m1 -b-St m2 -b-Y n1 block copolymers;

[0031] (2) After the first step of reaction is completed, add 0.2 to 1.1 parts by weight of silicon monomer into the reaction system, and react for 1-2 hours to obtain R-AA m1 -b-St m2 -b-Y n1 -b-M n2 block copolymers.

[0032] (3) After the second step reaction is completed, add 2.5-10 parts by weight of styrene mo...

Embodiment 1

[0051] (1) Stir and dissolve 0.2 parts by weight of amphiphilic macromolecular reversible addition and fragmentation chain transfer agent in 5 parts by weight of water to form an aqueous phase, then pour 0.9 parts by weight of hexafluorobutyl acrylate into the reactor, and stir Mixing, nitrogen deoxygenation for 30 minutes; the temperature of the reactor is raised to 70°C, keep stirring, nitrogen deoxygenation for more than 30 minutes. Add 0.005 parts by weight of the initiator to the reaction system, and after 1.5 hours of reaction, R-AA is obtained m1 -b-St m2 -b-F 6 BA n1 block copolymers;

[0052] (2) After the first step reaction is completed, 0.2 parts by weight of octamethylcyclotetrasiloxane (D4) is added to the reaction system, and after 1 hour of reaction, R-AA is obtained m1 -b-St m2 -b-F 6 BA n1 -b-D4 n2 block copolymers.

[0053] (3) After the second step reaction finishes, add the styrene monomer of 2.6 weight parts and the n-butyl acrylate monomer of 6 ...

Embodiment 2

[0058] (1) Stir and dissolve 0.5 parts by weight of amphiphilic macromolecular reversible addition and fragmentation chain transfer agent in 6.5 parts by weight of water to form a water phase, then pour 1.1 parts by weight of hexafluorobutyl acrylate into the reactor, keep Stir and remove oxygen with nitrogen for 30 minutes; raise the temperature of the reactor to 80°C, and keep stirring all the time. Add 0.012 parts by weight of the initiator to the reaction system, and after 1 hour of reaction, R-AA is obtained m1 -b-St m2 -b-F 6 BA n1 a block copolymer which is stably dispersed in water in the form of particles to form a latex;

[0059] (2) After the first step reaction is completed, 1.1 parts by weight of octamethylcyclotetrasiloxane is added to the reaction system, and after 1 hour of reaction, R-AA is obtained m1 -b-St m2 -b-Y n1 -b-M n2 block copolymers;

[0060] (3) After the second step reaction finishes, add the styrene monomer of 6.5 parts by weight and the ...

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Abstract

The invention discloses a high-performance soap-free fluorosilicone-acrylic latex paint and a preparation method thereof. It adopts a reversible addition chain transfer radical polymerization technology, adopts an emulsion polymerization system, and controls the feeding order of monomers to obtain fluorine-containing monomers, A block copolymer in which silicon-containing monomers are distributed in the outer layer of latex particles, and styrene and acrylic ester monomers are distributed inside the latex particles. The fluorine-containing monomer of the polymer by this method can be distributed in the outer layer in a controlled manner, and the silicon-containing monomer is located in the middle layer to form a secondary protection, so the low fluorine content can achieve the same water contact angle when the monomer is copolymerized. The added silicon-containing monomer can enhance the low-temperature resistance of the emulsion application, and in the later film-forming process, the active ‑Si(OH) groups generated by the hydrolysis of siloxane condense to generate more cross-linking points and form a denser film. Latex film, enhance the strength and water resistance of the film.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-performance soap-free fluorosilicone-acrylic latex paint and a preparation method thereof. Background technique [0002] "Oil-to-water" has become an irreversible trend in many fields such as coatings in my country. Water-based environmentally friendly coatings have great development potential, and the annual global demand is increasing at a rate of more than 10%. Fluorosilicone acrylic latex has excellent weather resistance, thermal stability and chemical stability, and has ultra-low surface energy characteristics, making it hydrophobic and oil-repellent, stain-resistant, self-cleaning and other functions, and can be used in metal, construction, plastic, wood, etc. products with broad application space. [0003] It is generally believed that when the contact angle between the coating and water is greater than 90°, it will have unique surface functio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D153/00C08F293/00C08F2/38
CPCC09D153/00C08F293/005C08F2/38C08F2438/03
Inventor 曹佳宁高翔罗英武赵俊杰
Owner QUZHOU RES INST OF ZHEJIANG UNIV
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