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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, high water absorption, and large interfacial tension. , it is difficult to apply to high-end products and harsh environments, especially the soft home industry
Through literature search: there is no silicone-fluorine modified styrene-acrylic emulsion and high-functional adhesive products available in China

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
Comparison scheme
Effect test

Embodiment 1

[0027] Provide a kind of preparation method of silicon fluorine modified styrene-acrylic emulsion, comprise the following steps:

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

[0029] Step 2: Add butyl acrylate, styrene, and acrylic acid mixed monomers to S1, and stir vigorously for 30 minutes to make a pre-emulsion;

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

[0031] Step 4: In a 250mL four-necked bottle 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 in S3, drop 1 / 5 of the pre-emulsion in S2 ...

Embodiment 2

[0034] Provide a kind of preparation method of silicon fluorine modified styrene-acrylic emulsion, comprise the following steps:

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

[0036] Step 2: Raise the temperature to about 60°C, add part of the initiator ammonium sulfate, then drop in about 1 / 5 of the mixed monomer of butyl acrylate, styrene and acrylic acid within 30 minutes, and keep it warm at 75-80°C to the liquid turns blue;

[0037] Step 3: Mix vinyltriethoxysilane into the remaining 4 / 5 butyl acrylate, styrene, acrylic acid mixed monomer, drop the mixed monomer and the remaining initiator ammonium sulfate solution into the flask within...

Embodiment 3

[0039] Vinyltriethoxysilane is added after the other monomers are dropped, and the other procedures are the same as those in the examples, and will not be repeated here.

[0040] 1. Based on the silicon-fluorine modified styrene-acrylic emulsion prepared in Examples 1-3, the influence of the amount of silicon monomer and the way of addition on the water absorption of the latex film was studied:

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

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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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