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Self-crosslinking fluorine-containing macromolecular emulsifier, fluorine-containing emulsion containing said emulsifier, preparation and use method thereof

A macromolecular emulsifier and self-crosslinking technology, which is applied in the field of fluorine-containing emulsions and self-crosslinking fluorine-containing macromolecular emulsifiers, can solve the problem of damage to the hydrophobicity of the coating, the decline in the performance of the fluoropolymer, and the impact on the hydrophobicity of the coating , anti-adhesion, hydrophobic stability and long-term effect, etc., to achieve the effect of easy operation of the polymerization process, fast polymerization speed and high molecular weight

Active Publication Date: 2021-07-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the emulsifier uses strong hydrophilic quaternary ammonium salt groups. These hydrophilic quaternary ammonium salt groups will gradually migrate to the surface of the coating due to molecular diffusion during the use of the coating and accumulate in the coating. The hydrophilic groups on the surface will seriously affect the hydrophobicity, anti-adhesion, and hydrophobic stability and long-term performance of the coating. Long-term contact with water will even elute the fluoropolymer on the coating, resulting in further performance. Decrease, severely damage the hydrophobic properties of the coating

Method used

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  • Self-crosslinking fluorine-containing macromolecular emulsifier, fluorine-containing emulsion containing said emulsifier, preparation and use method thereof
  • Self-crosslinking fluorine-containing macromolecular emulsifier, fluorine-containing emulsion containing said emulsifier, preparation and use method thereof
  • Self-crosslinking fluorine-containing macromolecular emulsifier, fluorine-containing emulsion containing said emulsifier, preparation and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Synthesis of fluorine-containing emulsion E1 containing self-crosslinking fluorine-containing macromolecular emulsifier:

[0084] Add 100ml N in the reactor, N dimethylacetamide (DMAC), perfluorooctyl ethyl acrylate 6g, methyl methacrylate 6g, hydroxyethyl acrylamide 8g, initiator benzoyl peroxide (BPO ) 0.2g, dissolve and stir at room temperature for 30 minutes under nitrogen flow to remove oxygen in the system. Under the condition of reflux, the temperature was raised to 60° C. for polymerization, and the polymerization reaction was carried out. After 6 hours of reaction, heating was stopped, and air was introduced to terminate the reaction to obtain a fluorine-containing macromolecular emulsifier. After discharging, 300 g of perfluorooctyl ethyl acrylate, 300 g of methyl methacrylate, 50 g of the fluorine-containing macromolecular emulsifier solution prepared above, and 2000 ml of deionized water were pre-emulsified with a supersonic emulsifier at room temperature f...

Embodiment 2

[0089] Synthesis of fluorine-containing emulsion E2 containing self-crosslinking fluorine-containing macromolecular emulsifier:

[0090] The synthesis process of E2 refers to Example 1, and the formula and process parameters are shown in Table 1 and Table 2 respectively.

[0091] E2 structure and performance characterization methods are the same as those in Example 1. The molecular weight, molecular weight distribution and fluorine content of E2 are shown in Table 3; the contact angle changes of the glass fiber non-woven membrane before and after being treated with E2 coating film are shown in Table 4.

Embodiment 3

[0093] Synthesis of fluorine-containing emulsion E3 containing self-crosslinking fluorine-containing macromolecular emulsifier:

[0094] The synthesis process of E3 refers to Example 1, and the formula and process parameters are shown in Table 1 and Table 2 respectively.

[0095] The method for characterizing the structure and performance of E3 is the same as that of Example 1. The molecular weight, molecular weight distribution and fluorine content of E3 are shown in Table 3; the contact angle changes of the glass fiber non-woven membrane before and after being treated with E3 coating film are shown in Table 4.

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Abstract

The invention discloses a self-crosslinking fluorine-containing macromolecular emulsifier, a fluorine-containing emulsion containing the emulsifier, and a preparation and use method thereof. The self-crosslinking fluorine-containing macromolecular emulsifier is obtained by solution copolymerization of a fluorine-containing vinyl monomer and a self-crosslinkable hydrophilic monomer in an organic solvent, and then the obtained polymer solution is used as an emulsifier to emulsify the fluorine-containing Monomers and comonomers to prepare fluorine-containing emulsions. The fluorine-containing macromolecular emulsifier prepared by connecting hydrophobic fluorine-containing side chains with hydrophilic groups has excellent emulsifying effect on fluorine-containing monomers, and the prepared fluorine-containing emulsion is extremely stable. The fluorine-containing emulsion of the present invention can be coated on the surface of the object to be treated by dipping, smearing and drying at high temperature. Good application prospects.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a self-crosslinking fluorine-containing macromolecular emulsifier, a fluorine-containing emulsion containing the emulsifier, and methods for preparing and using the emulsifier. Background technique [0002] Fluorine atoms have properties such as strong electronegativity, low polarizability, weak van der Waals force and high bond energy (485.3kJ / mol) of C-F bonds, which make fluoropolymers have outstanding heat resistance, solvent resistance and unique properties. Low surface energy and other advantages, coating the surface of the material with fluoropolymer can endow the material with excellent hydrophobic, oil-repellent and self-cleaning properties. The effective components of most existing waterproof finishing agents are fluorine-containing copolymers. [0003] Because fluorine-containing polymers are extremely inert, the organic solvents used for polymerization ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/58C08F220/24C08F220/14C08F220/18C08F220/22C08F214/20C08F214/18C08F214/26C08F2/30
CPCC08F2/30C08F214/186C08F214/265C08F220/14C08F220/18C08F220/24C08F220/58C08F214/205
Inventor 朱宝库银雪梁治樱张斌王文彬宋有志袁佳佳张音王纳川闫妍朱利平
Owner ZHEJIANG UNIV
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