Styrene-acrylate emulsion with hydrophobic oleophylic fluorine-silicon-modified nuclear shell structure and preparation method thereof

A technology of fluorine-silicon modification and core-shell structure, applied in separation methods, chemical instruments and methods, liquid separation, etc., to achieve excellent performance, good hydrophobic and lipophilic effects, and easy-to-control preparation conditions

Inactive Publication Date: 2011-05-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the water-emulsion type fluorine-containing resin with excellent

Method used

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  • Styrene-acrylate emulsion with hydrophobic oleophylic fluorine-silicon-modified nuclear shell structure and preparation method thereof
  • Styrene-acrylate emulsion with hydrophobic oleophylic fluorine-silicon-modified nuclear shell structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The first step of allyloxy nonylphenol polyoxyethylene (10) ether ammonium sulfate is an emulsifier; in parts by weight, get 0.1 part of sodium bicarbonate, 80 parts of water and 1.2 parts of emulsifier, join the stirring In the reactor of device, condensing pipe and water bath; heat up to 55°C;

[0032] In the second step, 0.7 parts of potassium persulfate are dissolved in 20 g of water to form an initiator solution, and 16 parts of styrene, 2 parts of methyl methacrylate, 10 parts of butyl acrylate, 0.5 parts of methacrylic acid, and 0.4 parts of N-hydroxy Methacrylamide, 0.05 parts of dodecyl mercaptan, 10 parts of water and 0.2 parts of emulsifier, emulsified at room temperature for 15 minutes, to obtain a pre-emulsion of the core layer mixed monomer;

[0033] In the third step, take 5% by weight of the core layer and mix the pre-emulsion and 5% by weight of the initiator solution, directly add it to the reaction vessel described in the first step, and then heat up ...

Embodiment 2

[0038] In the first step, 0.8 parts of alkyl diphenyl oxide ammonium disulfonate and 0.4 parts of octylphenol polyoxyethylene ether NP-9 are composite emulsifiers; in parts by weight, 0.2 parts of sodium bicarbonate and 120 parts of water And 40wt% composite emulsifier, join in the reactor that stirrer, condensation pipe and water bath are housed; Be warming up to 50 ℃;

[0039] The second step takes 1.2 parts of ammonium persulfate and dissolves 25g in water to form an initiator solution. Take 28 parts of styrene, 4.5 parts of butyl methacrylate, 3 parts of butyl acrylate, 2 parts of acrylic acid, 3 parts of acrylamide, 2.5 parts of Ethylene glycol dimethacrylate, 15 parts of water and 40wt% emulsifier were emulsified at room temperature for 30 minutes to obtain a pre-emulsion of the mixed monomers of the core layer;

[0040] The third step is to take 20wt% core layer pre-emulsion and 30wt% initiator solution, directly add to the reaction vessel described in the first step, a...

Embodiment 3

[0045] The first step is taken in parts by weight, 1.2 parts of sodium dodecylbenzenesulfonate and 0.8 parts of octylphenol polyoxyethylene ether OP-30 are composite emulsifiers; get 0.5 parts of dipotassium hydrogen phosphate, 150 parts of water and The emulsifying agent of 45wt% joins in the reactor that stirrer, condensation pipe and water bath are housed; Warming up to 40 ℃;

[0046] In the second step, 1 part of hydrogen peroxide-ferrous chloride (mass ratio 1: 1) was dissolved in 30 g of water to form an initiator solution, 50 parts of styrene, 14.2 parts of butyl methacrylate, 9 parts of propylene acrylate Ester, 2.8 parts of acrylic acid, 2.2 parts of trihydroxypropylene trimethacrylate, 1.8 parts of N-methylolacrylamide, 30 parts of water and 20wt% emulsifier, emulsified at room temperature for 35min, to obtain a pre-emulsion of the core layer mixed monomer;

[0047] The third step is to take 20wt% nuclear layer mixed monomer pre-emulsion and 25wt% initiator solution,...

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Abstract

The invention discloses a preparation method of styrene-acrylate emulsion with hydrophobic oleophylic fluorine-silicon-modified nuclear shell structure. The preparation method comprises the following step of: preparing fluorine-silicon-modified styrene-acrylate emulsion which has a nuclear shell structure and takes a styrene-acrylate polymer as a nucleus and a fluorine-silicon-modified styrene-acrylate polymer as a shell from a monomer, a cross-linking agent, an emulsifier, an initiator, a pH regulator and water by a room temperature pre-emulsification and seed emulsion polymerization process. The styrene-acrylate emulsion with the nuclear shell structure comprises a nucleus layer and a shell layer, wherein the nucleus layer is a copolymer of polymerizable monomers which does not contain fluorine and silicon; the shell layer is a copolymer of polymerizable monomers which contains a fluorine-silicon monomer; and the mass ratio of the nucleus to the shell is 1:4 to 4:1. The fluorine-silicon monomer is positioned in the shell layer, so that high performance of the fluorine-silicon polymer is kept, the using amount of the fluorine-silicon monomer is reduced and cost is saved; and a crosslinkable monomer is introduced and a film is formed by the reaction and crosslinking of radicals in an emulsion film forming process, so that the water resistance of the film is enhanced, and hydrophobic and oleophylic effects are enhanced; simultaneously, the phenomenon of possible migration of the fluorine-silicon monomer with low surface energy into latex particles is avoided.

Description

technical field [0001] The invention relates to a functional fluorine-silicon modified core-shell structure styrene-acrylic emulsion, in particular to a preparation method and application of a hydrophobic and lipophilic fluorine-silicon modified core-shell structure styrene-acrylic emulsion. The fluorine-silicon modified core-shell structure styrene-acrylic emulsion can be applied to oil-water separation filter media such as non-woven fabrics and filter paper. Background technique [0002] With the rapid development of the modern automobile industry and the increasingly stringent emission requirements of policies and regulations, modern automobiles have higher and higher requirements for the quality of fuel. Fuel, as the fuel of the car and the source of power, plays a decisive role in the normal operation of the engine. Its quality will directly affect the working state of the engine and the driving performance and service life of the car. Therefore, it is very important ...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/14C08F220/18C08F220/06C08F220/58C08F220/22C08F230/08C08F220/56C08F222/14C08F2/26C08F2/30B01D17/022
Inventor 文秀芳徐桂龙皮丕辉郑大锋邓丽丽蔡智奇程江杨卓如
Owner SOUTH CHINA UNIV OF TECH
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