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A kind of preparation method of side chain type hydrophobic oleophobic fluorine-containing polyurethane

A hydrophobic and oleophobic polyurethane technology, applied in the field of fluorine-containing polyurethane, can solve the problems of poor solubility of fluorine-containing polyurethane, lack of hydrophobic and oleophobic effect, and inability to protect the surface of polyurethane, and achieve good hydrophobic and oleophobic effect. Preparation method Simple, great practical effect

Active Publication Date: 2019-02-15
GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most fluorine-containing polyurethanes are synthesized from difunctional fluorinated polyethers or fluorinated diisocyanates. This product contains fluorocarbon groups in the main chain of its molecular structure. Due to the hydrogen bond, it is not easy to migrate and enrich on the surface, so it cannot effectively protect the polyurethane surface, and cannot achieve a good hydrophobic and oleophobic effect, and the solubility of this fluorine-containing polyurethane is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The invention discloses a preparation method of side chain type hydrophobic and oleophobic fluorine-containing polyurethane, which comprises the following steps:

[0031] 1) Synthesis of fluorine-containing end-capping agent

[0032] Dissolve ethanolamine and fluorine-containing acrylate monomer in solvent A, deoxygenate with nitrogen, and react at a reaction temperature of 35°C for 3.5 h until the reaction of the amine groups is complete, and distill under reduced pressure to obtain a hydroxyl-terminated fluorine-containing end-capping agent (FA -OH);

[0033] 2) Synthesis of fluorine-containing chain extenders

[0034] Dissolve diethanolamine and methyl acrylate in solvent A, remove oxygen with nitrogen, and react for 5 h at a reaction temperature of 25°C. After the imino reaction is complete, add ethylenediamine, react for 5 h at 35°C, and depressurize Distill to remove unreacted ethylenediamine, add fluorine-containing acrylate monomer solution dissolved in solven...

Embodiment 2

[0041] The invention discloses a preparation method of side chain type hydrophobic and oleophobic fluorine-containing polyurethane, which comprises the following steps:

[0042] 1) Synthesis of fluorine-containing end-capping agent

[0043] Dissolve ethanolamine and fluorine-containing acrylate monomer in solvent A, deoxygenate with nitrogen, and react at a reaction temperature of 35°C for 3.5 h until the reaction of the amine groups is complete, and distill under reduced pressure to obtain a hydroxyl-terminated fluorine-containing end-capping agent (FA -OH);

[0044] 2) Synthesis of fluorine-containing chain extenders

[0045] Dissolve diethanolamine and methyl acrylate in solvent A, remove oxygen with nitrogen, and react for 5 h at a reaction temperature of 25°C. After the imino reaction is complete, add ethylenediamine, react for 5 h at 35°C, and depressurize Distill to remove unreacted ethylenediamine, add fluorine-containing acrylate monomer solution dissolved in solven...

Embodiment 3

[0052] The invention discloses a preparation method of side chain type hydrophobic and oleophobic fluorine-containing polyurethane, which comprises the following steps:

[0053] 1) Synthesis of fluorine-containing end-capping agent

[0054] Dissolve ethanolamine and fluorine-containing acrylate monomer in solvent A, deoxygenate with nitrogen, and react at a reaction temperature of 45°C for 2.5 h until the reaction of the amine group is complete, and distill under reduced pressure to obtain a fluorine-containing end-capping agent (FA -OH);

[0055] 2) Synthesis of fluorine-containing chain extenders

[0056] Dissolve diethanolamine and methyl acrylate in solvent A, deoxygenate with nitrogen, and react for 3.5 hours at a reaction temperature of 35°C. After the imino reaction is complete, add ethylenediamine, react for 4 hours at 45°C, and depressurize Distill to remove unreacted ethylenediamine, add fluorine-containing acrylate monomer solution dissolved in solvent A according...

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Abstract

The invention discloses a preparation method of side chain type hydrophobic and oleophobic fluorine-containing polyurethane. The preparation method comprises steps as follows: 1) synthesis of a fluorine-containing end-capping agent; 2) synthesis of a fluorine-containing chain extender; 3) synthesis of a polyurethane prepolymer; 4) chain extending and end capping reactions. The preparation method has the advantages that the hydrophobic and oleophobic effects are good, raw materials are cheap and easy to obtain, the preparation method is simple and capable of realizing industrial production and the like.

Description

technical field [0001] The invention relates to the technical field of fluorine-containing polyurethane, in particular to a preparation method of side-chain type hydrophobic and oleophobic fluorine-containing polyurethane. Background technique [0002] In recent years, fluorine-containing polyurethane has attracted widespread attention due to its unique properties. Since Bayer reported the chemical process of polyurethane synthesis in 1947, the research on FPU was first reported in a British patent in 1958. Lovelace synthesized fluorine-containing polyurethane for the first time by reacting non-fluorinated isocyanate and fluorinated diol, which attracted scientists from all over the world. broad interests. [0003] Fluorine has strong electronegativity, high C-F bond energy (540KJ / mol), the smallest van der Waals radius except hydrogen, and the shielding effect of fluorine on carbon chains. Due to the introduction of fluorine, the excellent mechanical properties and two-pha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/10C08G18/48C08G18/66C08G18/32C08G18/67
CPCC08G18/10C08G18/4825C08G18/4837C08G18/4854C08G18/6674C08G18/6696C08G18/6775C08G18/3206
Inventor 袁琴陈旭东魏珊珊唐孝芬朱永祥张奇
Owner GUANGDONG JUHANG INST FOR ADVANCED MATERIALS CO LTD