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Fluorine-silicon modified styrene-acrylic emulsion with comb-shaped structure and preparation method of fluorine-silicon modified styrene-acrylic emulsion

A technology of fluorosilicon modification and styrene-acrylic emulsion, which is applied in the direction of coating, etc., can solve the problems of slow polymerization rate, product stability and unsatisfactory surface properties, etc., and the realization time is short, the preparation process is simple and easy, and the stability is good and the effect of surface properties

Active Publication Date: 2021-06-15
濮阳蓝星新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of slow polymerization rate and unsatisfactory product stability and surface properties existing in the preparation process of the prior art, the present invention provides a fluorosilicone-modified styrene-acrylic emulsion with a comb structure and a preparation method thereof

Method used

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  • Fluorine-silicon modified styrene-acrylic emulsion with comb-shaped structure and preparation method of fluorine-silicon modified styrene-acrylic emulsion
  • Fluorine-silicon modified styrene-acrylic emulsion with comb-shaped structure and preparation method of fluorine-silicon modified styrene-acrylic emulsion

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Experimental program
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Effect test

Embodiment 1

[0031] 1) Dissolve 1g sodium lauryl sulfate and 2g sodium alcohol ether sulfosuccinate containing double bonds in 90g water to prepare emulsifier aqueous solution A;

[0032] 2) A monomer mixture of 10g styrene, 10g butyl acrylate, 7g dodecafluoroheptyl acrylate, 0.5g γ-methacryloxypropyltrimethoxysilane and 4.85g hydroxyl silicone oil was mixed with 1g n-hexadecane Prepare a uniform solution B;

[0033] 3) Disperse solution B into emulsifier aqueous solution A under stirring to obtain pre-emulsion C; 4) Ultrasonicate pre-emulsion C in an ultrasonic cell pulverizer with a power of 600w for 15 min. Obtain miniemulsion D;

[0034] 5) Add 0.3g of water-soluble initiator azobisisobutylamidine hydrochloride to 15g of water to make initiator aqueous solution E

[0035] 6) Raise the temperature of the miniemulsion D to 80°C, drop the aqueous initiator solution E into the miniemulsion D for 2 hours to initiate polymerization, and keep the reaction for 6 hours after the initiator is ...

Embodiment 2

[0037] 1) Mix 0.5g sodium dodecylsulfate, 0.5g sodium dodecylbenzenesulfonate and 2g allyl-containing special alcohol ether sulfate in 100g water to make emulsifier aqueous solution A;

[0038] 2) A monomer mixture of 10g styrene, 5g butyl acrylate, 5g methyl methacrylate, 7g hexafluorobutyl acrylate, 0.5g γ-methacryloxypropyl trimethoxysilane and 4.85g hydroxyl silicone oil Prepare a uniform solution B with 1.5g n-hexadecane;

[0039] 3) Disperse solution B into emulsifier aqueous solution A under stirring to obtain pre-emulsion C; 4) Ultrasonicate pre-emulsion C in an ultrasonic cell pulverizer with a power of 500w for 20min. Obtain miniemulsion D;

[0040] 5) Add 0.3g of water-soluble initiator azobisisobutylamidine hydrochloride to 10g of water to make initiator aqueous solution E

[0041] 6) Raise the temperature of the miniemulsion D to 85°C, drop the aqueous initiator solution E into the miniemulsion D for 2 hours to initiate polymerization, and keep it warm for 5 hou...

Embodiment 3

[0043] 1) Dissolve 1.5g sodium dodecylbenzenesulfonate and 2g sodium alcohol ether sulfosuccinate containing double bonds in 90g water to prepare emulsifier aqueous solution A;

[0044] 2) A monomer mixture of 5g styrene, 5g methyl methacrylate, 10g butyl acrylate, 7g dodecafluoroheptyl acrylate, 0.5g vinyltriethoxysilane and 5g hydroxyl silicone oil was mixed with 1.5g n-hexadecane Alkane is prepared into a uniform solution B;

[0045] 3) Disperse solution B into emulsifier aqueous solution A under stirring to obtain pre-emulsion C; 4) Ultrasonicate pre-emulsion C in an ultrasonic cell pulverizer with a power of 600w for 15 min. Obtain miniemulsion D;

[0046] 5) Add 0.3g of water-soluble initiator ammonium persulfate to 15g of water to make initiator aqueous solution E

[0047] 6) Raise the temperature of the miniemulsion D to 85°C, drop the aqueous initiator solution E into the miniemulsion D for 1.5h to initiate polymerization, and keep the reaction for 5h after the init...

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Abstract

The invention discloses a comb-shaped fluorine-silicon modified styrene-acrylic emulsion and a preparation method thereof. The method comprises the following steps: 1) dissolving an emulsifier and a reactive emulsifier in water to prepare an aqueous emulsifier solution A; 2) preparing a uniform solution B from a monomer mixture of styrene, acrylate, fluorine-containing acrylate, vinyl organosiloxane and hydroxyl silicone oil as well as a water repellent; 3) dispersing the solution B into the aqueous emulsifier solution A under stirring to obtain a pre-emulsion C; 4) performing fine emulsification on the pre-emulsion C to obtain a miniemulsion D; and 5) adding a water-soluble initiator into the miniemulsion D, and conducting initiating to obtain the fluorine-silicon modified styrene-acrylic emulsion. According to the invention, a miniemulsion polymerization method is adopted, polymerization is carried out in liquid drops, and the prepared product can be used as a functional coating material on the surfaces of paper, fabrics, leather and the like, has good stability, and also has excellent film-forming property, air permeability, brightness, water and oil resistance, heat resistance and chemical reagent resistance.

Description

technical field [0001] The invention relates to the technical field of polymer preparation, in particular to a comb structure fluorosilicon-modified styrene-acrylic emulsion and a preparation method thereof. Background technique [0002] Styrene-acrylic emulsion has excellent film-forming properties, air permeability, brightness, etc. After being modified with fluorosilicone, its water and oil repellency, heat resistance and chemical resistance are significantly enhanced, and it can be used as a functional coating. However, the prior art has the following problems: 1. The silicone branch chains usually introduced are relatively short, which are easily "covered" by other branch chains or "embedded" by acrylic resin molecules, making it difficult to stretch and migrate to the surface of the latex film, affecting its Surface properties; 2. Conventional fluorosilicon-modified acrylate monomers adopt emulsion polymerization, vinyl silicone monomers are easily hydrolyzed to genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08F212/08C08F220/14C08F220/24C08F230/08C09D151/08
CPCC08F283/12C09D151/08C08F212/08C08F220/1804C08F220/24C08F230/085Y02E60/10
Inventor 辛华余文琪张岩罗浩李阳帆彭琪
Owner 濮阳蓝星新材料有限公司
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