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Fluorine silicon-modified acrylic ester emulsion and preparation method thereof

A perfluoroalkyl acrylate and acrylate technology, applied in polyurea/polyurethane coatings, coatings, paints containing biocides, etc., can solve the problem of high porosity, reduced paint film compactness, and easy penetration of stains into the paint film , Paint stain resistance decline and other problems, to achieve the effect of maintaining stability and effectiveness, good electrical conductivity, and improving solvent resistance

Active Publication Date: 2013-11-13
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large particle size filler makes the surface of the paint film rough, and the high porosity reduces the compactness of the paint film, so that stains easily penetrate into the paint film and are difficult to remove, and the stain resistance of the paint decreases.

Method used

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  • Fluorine silicon-modified acrylic ester emulsion and preparation method thereof
  • Fluorine silicon-modified acrylic ester emulsion and preparation method thereof
  • Fluorine silicon-modified acrylic ester emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] One, the main composition of described fluorosilicon modified acrylate emulsion is as follows:

[0057] The raw material consumption of table 1 core-shell two-layer pre-emulsion

[0058]

[0059] The core layer pre-emulsion and the shell layer pre-emulsion are respectively according to the above composition, mixed and stirred for 20-30min at a rotation speed of 500-600rpm, and set aside.

[0060] Table 2 Initiator aqueous solution

[0061] Substance name Initial initiator / g Dropping initiator / g sodium persulfate 0.35 1.00 Deionized water 6 48

[0062] The emulsion viscosity was measured with a NDJ-1 rotary viscometer. The measurement conditions are as follows: the test temperature is 25°C; the No. 1 rotor is used; the rotation speed is 60r / min, see GB / T1723-1993. The same below.

[0063] Two, the preparation of described fluorosilicon modified acrylate emulsion is as follows:

[0064] Put 100 grams of deionized water, 0.4 g...

Embodiment 2

[0075] One, the main composition of described fluorosilicon modified acrylate emulsion is as follows:

[0076] The raw material consumption of table 4 core-shell two-layer pre-emulsion

[0077]

[0078] The core layer pre-emulsion and the shell layer pre-emulsion are respectively made according to the above composition, mixed and stirred for 20-30 minutes at a rotation speed of 500-600 rpm, and stirred evenly for later use.

[0079] Table 5 Initiator aqueous solution

[0080] Substance name Initial initiator / g Dropping initiator / g potassium persulfate 0.8 2.2 Deionized water 10 50

[0081] Two, the preparation of described fluorosilicon modified acrylate emulsion is as follows:

[0082] Put 90 grams of deionized water, 0.5 grams of sodium alkyl polyoxyethylene sulfonate, 0.5 grams of NP-40 and 3.0 grams of sodium bicarbonate into the reaction kettle and stir evenly, then add 44 grams of core layer pre-emulsion, and heat up to 75 °...

Embodiment 3

[0090] One, the main composition of described fluorosilicon modified acrylate emulsion is as follows:

[0091] The raw material consumption of table 7 core-shell two-layer pre-emulsion

[0092]

[0093]

[0094] The core layer pre-emulsion and the shell layer pre-emulsion are respectively according to the above composition, mixed and stirred for 20-30min at a rotation speed of 500-600rpm, and set aside.

[0095] Table 8 Initiator aqueous solution

[0096] Substance name Initial initiator / g Dropping initiator / g Ammonium persulfate 0.6 1.4 Deionized water 10 50

[0097] Two, the main composition of described fluorosilicon modified acrylate emulsion is as follows:

[0098] 105 grams of deionized water, 0.5 grams of 1-propenyloxy-2-hydroxypropanesulfonate sodium, 0.6 grams of OP-10 and 1.5 grams of sodium carbonate were put into the reactor and stirred evenly, then 37 grams of the core layer pre-emulsion was added and the temperature ...

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Abstract

The invention discloses a fluorine silicon-modified acrylic ester emulsion and a preparation method thereof. The fluorine silicon-modified acrylic ester emulsion is a shell-core emulsion mainly prepared from a fluorine monomer, vinyl triisopropoxysilane, nano silica sol, a vinyl monomer, a long carbon chain monomer, an emulsifier, a pH buffer, an initiator, deionized water and the like. The fluorine monomer is delayed to be dripped during polymerization, so that the fluorine element is enriched on the surfaces of emulsion particles, the hydrophobic and oleophobic properties of fluorine elusion is given full play to, the use of the fluorine monomer is reduced, and the cost is reduced. The composition of inorganic silicon oxide particles and an organic polymer keeps the good film forming property of the polymer and has the weather resistance, high hardness and other characteristics of the inorganic matter, so as to improve the stain resistance of a varnish film.

Description

technical field [0001] The invention can be used for coating interior walls of buildings, and relates to a core-shell type fluorosilicon-modified acrylate emulsion and a preparation method thereof. Background technique [0002] The surface free energy of fluorine-modified polymers containing perfluoroalkyl groups is low, which can endow the surface of the material with excellent hydrophobic, oleophobic and anti-fouling properties. potential applications. Zisman had reported in 1962 that (meth) acrylate perfluoroalkyl ester homopolymer had extremely low surface energy (10-11mN / m) when the side chain perfluoromethylene units exceeded 7 (JPhys Chem. , 1962, 66:1207-1208). [0003] There are three main methods for introducing fluorine-containing groups: one is to use chlorotrifluoroethylene, tetrafluoroethylene and vinyl ethers / vinyl acetates to copolymerize (such as the Chinese invention patent 200510135388.7 applied for). This method is often used for carbon resins; the sec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F220/14C08F220/18C08F220/06C08F230/08C08F220/22C08F2/44C08F2/30C08F2/26C08K3/36C09D125/14C09D133/12C09D175/04C09D7/12C09D5/16
Inventor 王小妹伍雪芬王代民李建明刘薇薇胡晓光区英强
Owner SUN YAT SEN UNIV
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