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Fluorine-contained cation type emulsion and preparing method

A cationic and emulsion technology, which is applied in the field of fluorine-containing cationic emulsion, can solve the problems of waste of fluorine-containing monomers, low conversion rate, large amount of fluorine-containing monomers, etc., and achieve the effect of reducing costs

Inactive Publication Date: 2007-11-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the hydrophobic and oleophobic properties of fluorine-containing monomers, the traditional emulsion polymerization process will encounter such a problem: that is, the fluorine-containing monomers are not easy to transfer from the large monomer droplets to the micelles, which leads to a decrease in the conversion rate. Very low, large waste of fluoromonomers in the system [Linemann, R F.; Malner T E.; Brandsch R.; Bar G.; Ritter W.; Macromolecules, 1999, 32, 1715-1721.]
At present, the method of preparing fluorine-containing microspheres is mainly to use various polymerization methods to copolymerize fluorine-containing monomers and non-fluorine-containing monomers to prepare hybrid fluorine-containing materials, but the emulsifiers used in these preparation processes are still As a small molecular weight emulsifier, there are always problems of unstable emulsion and large amount of fluorine-containing monomers

Method used

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  • Fluorine-contained cation type emulsion and preparing method
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  • Fluorine-contained cation type emulsion and preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1: Fluorine-containing cationic emulsion and its preparation

[0028] (1) Prepare the water phase: take 0.1g of emulsifier (PMMA 10 -b-PDMAEMA 15 -b-POFPMA 5 ) was dissolved in 90.0 g of deionized water, fully stirred to fully dissolve the emulsifier to form a uniform water phase, and then adjust the pH value of the water phase to 3.0 for later use.

[0029] (2) Prepare oil phase: according to the solid content ratio is 10%, take by weighing 10.0g monomer styrene, then take by weighing 0.10g initiator azobisisobutyronitrile (AIBN) (1.0% for monomer), help 0.40 g of emulsifier hexadecyl (4.0% of the monomer) was dissolved in the reaction monomer, and stirred thoroughly to form a uniform oil phase, ready for use.

[0030] (3) Pre-emulsification: slowly drop the oil phase into the high-speed stirring water phase, and stir for 20-30 minutes.

[0031] (4) Fine emulsification: The pre-emulsified emulsion is immediately finely emulsified by ultrasonic waves for 5-1...

Embodiment 2

[0033] Example 2: Fluorine-containing cationic emulsion and its preparation

[0034] (1) Prepare the water phase: take by weighing 0.2g of emulsifier (PMMA 10 -b-PDMAEMA 15 -b-POFPMA 5 ) was dissolved in 90.0 g of deionized water, fully stirred to fully dissolve the emulsifier to form a uniform water phase, and then adjust the pH value of the water phase to 5.0 for later use.

[0035] (2) Prepare oil phase: according to the solid content ratio is 10%, take by weighing 10.0g monomer styrene, then take by weighing 0.10g initiator azobisisobutyronitrile (AIBN) (1.0% for monomer), help 0.40 g of emulsifier hexadecyl (4.0% of the monomer) was dissolved in the reaction monomer, and stirred thoroughly to form a uniform oil phase, ready for use.

[0036] (3) Pre-emulsification: slowly drop the oil phase into the high-speed stirring water phase, and stir for 20-30 minutes.

[0037] (4) Fine emulsification: The pre-emulsified emulsion is immediately finely emulsified by ultrasonic w...

Embodiment 3

[0039] Example 3: Fluorine-containing cationic emulsion and its preparation

[0040] (1) Prepare the water phase: take by weighing 0.3g of emulsifier (PMMA 10 -b-PDMAEMA 15 -b-POFPMA 5 ) was dissolved in 90.0 g of deionized water, fully stirred to fully dissolve the emulsifier to form a uniform water phase, and then adjust the pH value of the water phase to 7.0 for later use.

[0041] (2) Prepare oil phase: according to the solid content ratio is 10%, take by weighing 10.0g monomer styrene, then take by weighing 0.10g initiator azobisisobutyronitrile (AIBN) (1.0% for monomer), help 0.40 g of emulsifier hexadecyl (4.0% of the monomer) was dissolved in the reaction monomer, and stirred thoroughly to form a uniform oil phase, ready for use.

[0042] (3) Pre-emulsification: slowly drop the oil phase into the high-speed stirring water phase, and stir for 20-30 minutes.

[0043] (4) Fine emulsification: The pre-emulsified emulsion is immediately finely emulsified by ultrasonic wav...

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Abstract

This invention relates to a fluorine cationoid latices and preparation method. The invention takes amphipathy fluorine block polymer as macromolecule emulsifying agent to apply to fine emulsion polymerization, obtain a kind of emulsion particle that has fluorine chain segment and protonated chain segment on surface, namely fluorine cationoid latices. This invention overcomes the traditional process shortcoming of high production cost, at the same time proceed functionalization to the emulsion particle.

Description

technical field [0001] The invention relates to a fluorine-containing cationic emulsion, in particular to the use of a fluorine-containing amphiphilic tri-block copolymer as an emulsifier in miniemulsion polymerization to obtain the positive charge on the particle surface and the function of fluorine-containing groups latex particles. Background technique [0002] Fluorine-containing emulsions are environmentally friendly products with excellent weather resistance, high chemical stability, water and oil repellency, and are expected to be applied in many important fields. Since the C-F bond energy of the fluoropolymer is larger than the C-C bond energy, and because the fluorine atom replaces the hydrogen atom to protect the carbon skeleton, the fluoropolymer emulsion has excellent weather resistance, heat resistance, and gloss retention. , acid rain resistance, etc.; due to the extremely low surface energy of fluorine-containing materials, the resulting coating film has exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/24
Inventor 倪沛红毛江张文玲张明祖
Owner SUZHOU UNIV