Silicon-fluorine modified styrene-acrylic emulsion and preparation method thereof

A styrene-acrylic emulsion and silicon-fluorine modification technology, which is applied in the field of silicon-fluorine modified styrene-acrylic emulsion and its preparation, can solve the problems of high interfacial tension, poor initial viscosity, difficulty in applying high-end products, etc., and achieve improved roughness and improved The effect of contact angle

Inactive Publication Date: 2020-02-18
SHENZHEN TAIQIANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, water-based styrene-acrylic emulsion adhesives use water as the medium, are non-toxic, tasteless, and non-flammable, and are gradually accepted by the market. However, due to their own chemical properties, the styrene-acrylic emulsions on the market have defects such as poor initial viscosity,

Method used

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  • Silicon-fluorine modified styrene-acrylic emulsion and preparation method thereof
  • Silicon-fluorine modified styrene-acrylic emulsion and preparation method thereof
  • Silicon-fluorine modified styrene-acrylic emulsion and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0026] Example 1:

[0027] Provided is a preparation method of silicon-fluorine modified styrene-acrylic emulsion, comprising the following steps:

[0028] The first step: mix the nonylphenol polyoxyethylene ether and sodium lauryl sulfate in a mass ratio of 3:2 to obtain an emulsifier, take three quarters of the emulsifier and add it to deionized water, stir and dissolve;

[0029] The second step: add butyl acrylate, styrene, and acrylic acid mixed monomers to S1, and vigorously stir for 30 minutes to prepare a pre-emulsion;

[0030] The third step: dissolve the initiator ammonium persulfate into an appropriate amount of water to prepare an initiator solution;

[0031] Step 4: In a 250mL four-neck flask equipped with a reflux condenser, an electric stirrer, a constant pressure dropping funnel and a thermometer, add an appropriate amount of sodium bicarbonate, deionized water and the remaining quarter of the emulsifier, and heat up to 60°C, add part of the initiator solution...

Example Embodiment

[0033] Example 2:

[0034] Provided is a preparation method of silicon-fluorine modified styrene-acrylic emulsion, comprising the following steps:

[0035] The first step: Mix the nonylphenol polyoxyethylene ether and sodium lauryl sulfate in a mass ratio of 3:2 to obtain an emulsifier. Add the emulsifier and a certain amount of sodium bicarbonate to a reflux condenser, an electric Add a certain amount of deionized water to a 250mL four-necked flask with a stirrer, a constant pressure dropping funnel and a thermometer, and stir to dissolve;

[0036] The second step: raise the temperature to about 60°C, add part of the initiator ammonium sulfate, and then drop about 1 / 5 of the mixed monomers of butyl acrylate, styrene and acrylic acid within 30min, and keep the temperature at 75-80°C to liquid turns blue;

[0037] Step 3: Mix vinyltriethoxysilane into the remaining 4 / 5 mixed monomers of butyl acrylate, styrene and acrylic acid, drop the mixed monomers and the remaining initia...

Example Embodiment

[0038] Example 3:

[0039] The vinyltriethoxysilane is added after the other monomers have been dropped, and the other processes are the same as the preparation process of the embodiment, and will not be repeated here.

[0040] 1. Based on the silicon-fluorine-modified styrene-acrylic emulsion prepared in Example 1-3, the influence of silicon monomer dosage and adding method on the water absorption of latex film was studied:

[0041] see figure 1 , keeping other reaction conditions unchanged, the effect of vinyltriethoxysilane dosage on the water absorption of latex film is given by figure 1It can be seen that changing the amount of vinyltriethoxysilane has a significant effect on the water absorption of the latex film; in the preparation process of Example 1 and Example 2, adding vinyltriethoxysilane can improve the The water resistance of latex film; but when adopting the method of adding organosilicon monomer after Example 3, after adding vinyltriethoxysilane, the water a...

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Abstract

The invention relates to a silicon-fluorine modified styrene-acrylic emulsion and a preparation process thereof. The silicon-fluorine modified styrene-acrylic emulsion comprises the following raw materials: butyl acrylate, styrene, acrylic acid, nonylphenol polyoxyethylene ether, lauryl sodium sulfate, vinyltriethoxysilane, ammonium persulfate, sodium bicarbonate, tetrahydrofuran, methacrylic acid, acrylamide, N-hydroxymethyl acrylamide, hydroquinone, a fluorine-containing monomer, ammonia water and a proper amount of deionized water. The preparation process comprises a pre-emulsification method, a semi-continuous monomer dropwise adding method and an organosilicon monomer post-adding method. According to the invention, the comprehensive performance of the emulsion is studied by a polymerization process, a polymerization temperature, the addition amounts and addition modes of organic silicon and organic fluorine, and the dosage and proportion of an emulsifier; the styrene-acrylic emulsion has the advantages of both organic silicon and organic fluorine, so that the performance of the emulsion is better improved on the basis of effectively reducing the cost of the emulsion, the emulsion with higher market competitiveness is obtained, and the blank of domestic and overseas markets is filled.

Description

technical field [0001] The invention relates to the technical field of environmental protection materials, in particular to a silicon-fluorine modified styrene-acrylic emulsion and a preparation method thereof. Background technique [0002] With the stricter requirements of national environmental protection regulations, adhesives are developing in the direction of environmentally friendly high-performance water-based emulsions. Among them, water-based styrene-acrylic emulsion adhesives use water as the medium, are non-toxic, tasteless, and non-flammable, and are gradually accepted by the market. However, due to their own chemical properties, the styrene-acrylic emulsions on the market have defects such as poor initial viscosity, high water absorption, and large interfacial tension. , it is difficult to apply to high-end products and harsh environments, especially the soft home furnishing industry. Retrieval of literature: At present, there is no silicone-fluorine-modified s...

Claims

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Application Information

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IPC IPC(8): C08F220/24C08F220/18C08F212/08C08F220/06C08F230/08C08F220/56C08F220/58C08F2/26C08F2/30
CPCC08F2/26C08F2/30C08F220/24
Inventor 李满林胡赞军刘志军张凤帮陈君华
Owner SHENZHEN TAIQIANG CHEM
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