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Shell-core type fluoride containing emulsion

A core-shell type latex technology, which is applied in the field of core-shell fluorine-containing acrylate latex, can solve the problems of restricting the wide application of fluorine-containing latex, high cost and high price of fluorine-containing latex, and achieve easy control, lower latex cost, The effect of reducing dosage

Inactive Publication Date: 2004-11-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of fluorine monomer, the cost of fluorine-containing latex is too high, which limits the wide application of fluorine-containing latex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Mix the following ingredients in a 1000ml beaker: 100g of butyl methacrylate, 2g of divinylbenzene, 3g of sodium lauryl sulfate-OP-10 composite emulsifier, 400 g of deionized water, stir at high speed to obtain a stable pre-emulsion, and obtain a stable The pre-emulsion I. Pre-emulsion I is added in the reactor that agitator, feeder, thermometer and condenser are equipped with, then add initiator sodium persulfate-ferrous salt 0.6g, sodium bicarbonate 0.8g, logical nitrogen deoxygenation, stirring and heating, The temperature of the water bath was raised to 50° C., and opalescence appeared after 3 minutes, and the seed emulsion was obtained. At the same time, place the remaining monomers, emulsifier, dodecanethiol, and 100g of water in an SK1200H ultrasonic cleaner for pre-emulsification for 0.5 hours, and obtain the shell pre-emulsion II through ultrasonic pre-emulsification, and then drop the shell pre-emulsion and the initiator solution at the same time into the see...

Embodiment 2

[0029] 100g of butyl acrylate, 2g of perfluoroalkylethyl methacrylate, 3g of octadecyltrimethylammonium chloride, and 300g of deionized water were placed in a USC-102 ultrasonic cleaner for pre-emulsification for 1 hour to obtain stable seed pre-emulsion. Add the seed pre-emulsion to the reaction kettle equipped with agitator, thermometer, feeder and reflux condenser, then add initiator ammonium persulfate-sodium bisulfite-copper sulfate 0.6g, sodium hydrogen phosphate 0.8g, and nitrogen to remove Oxygen, stirred and heated, the temperature of the water bath was raised to 40°C, opalescence appeared soon, and the seed emulsion was obtained. At the same time, the remaining monomers, emulsifier, mercaptoethanol, and 100 g of water were also ultrasonically pre-emulsified to obtain a shell pre-emulsion, and then the shell pre-emulsion and the initiator solution were added dropwise to the seed emulsion at the same time, and the reaction was continued for 5 hours to obtain a shell pr...

Embodiment 3～6

[0033] Except for some monomers, other conditions are the same as in Example 1 or 2, and the specific monomers and their dosage are shown in Table 3.

[0034] The monomer consumption (weight part) in the embodiment 3-6 of table 3

[0035] Monomer Example 3 Example 4 Example 5 Example 6

[0036] Lower (meth)acrylate 100 100 100 100

[0037] Divinylbenzene 2 0 - 0

[0038] Perfluoroalkylethyl (meth)acrylate 30 75 30 30

[0039] Advanced (meth)acrylate 10 20 - 8

[0040] Vinylidene chloride 3 - - 3

[0041]Hydroxyalkyl (meth)acrylate 1 - - 1

[0042] Diacrylate crosslinking monomer 1 1 - -

[0043] N-Hydroxyacrylamide 1 2 - 2

[0044] In Table 3: said (meth)acrylic acid lower ester contains C 1 ~C 8 (meth)acrylates;

[0045] The (meth)acrylic higher esters contain C 12 ~C 16 (meth)acrylates;

[0046] Said diacrylate crosslinking monomer contains C 2 ~C 12 Diacrylate crosslinking monomer;

[0047] Said perfluoroalkylethyl (meth...

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Abstract

The invention discloses a core-shell type acrylic acid ester latex containing fluorine (methyl) which is prepared from monomers, emulsifying agent, initiating agent, pH regulator and water through supersonic wave pre-emulsion by employing core-shell emulsion polymerization. Compared with the prior art, the invention is characterized in that the fluorine monomer is enriched in the shell layer, thus greatly reducing the consumption of fluorine monomer.

Description

technical field [0001] The invention relates to a core-shell type fluorine-containing (meth)acrylate latex. Background technique [0002] Fluorine-containing polymers have many excellent properties, such as excellent water and oil repellency, aging resistance, high temperature resistance, low surface tension and chemical stability, etc. It is well known to use fluorine-containing (meth)acrylate copolymers in the design of hydrophobic and oil-repellent finishing agents for fabrics. From the perspective of environment and safety, this type of finishing agent has been developed from the initial organic solvent type to the current one. Aqueous dispersion emulsion. [0003] The existing fluorine-containing (meth)acrylate latex must use a relatively high amount of fluorine monomer in order to achieve better hydrophobic and oil-repellent effects, and the amount of fluorine monomer accounts for 60-70% of the total monomer weight. %. Due to the high price of fluorine monomer, the ...

Claims

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Application Information

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IPC IPC(8): C08F2/00C08F220/10
Inventor 韩哲文王艳李欣欣
Owner EAST CHINA UNIV OF SCI & TECH
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