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Fluoride core-shell acrylic-resin emulsion, its production and use

A core-shell acrylate and acrylate technology, applied in the field of polymer chemistry, can solve the problems of coating water resistance, stain resistance limitation, harsh reaction conditions, high film forming temperature, etc., to achieve high hydrophobicity, low film forming temperature, good flexibility

Inactive Publication Date: 2007-09-05
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of small molecule emulsifiers, the water resistance and stain resistance of the coating are limited
[0005] Most of the fluoropolymers used in the past water-based fluorine coatings are polytetrafluoroethylene, tetrafluoroethylene-hexafluoroethylene (FEP), tetrafluoroethylene-perfluoroalkyl ether (PFA), etc., and the film-forming temperature of these coatings is relatively high. , the reaction conditions are harsh, and the price is high

Method used

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  • Fluoride core-shell acrylic-resin emulsion, its production and use
  • Fluoride core-shell acrylic-resin emulsion, its production and use
  • Fluoride core-shell acrylic-resin emulsion, its production and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Preparation of reactive emulsifier

[0033] Take 4.75Kg of maleic anhydride, 3Kg of OP-10, a kind of alkylphenol-based polyoxyethylene ether, mix and react at 70~130℃ for 4~6 hours, then add sodium carbonate to adjust the PH value to 6. ~7, to prepare a reactive emulsifier. The molecular formula of the reactive emulsifier is:

[0034]

[0035] Using other alkylphenol-based polyoxyethylene ethers, such as OP-2~OP-15, OP-18, OP-20, etc., instead of OP-10, the reactive emulsifier can also be prepared. The molecular structure of the reactive emulsifier and the effect of preparing fluorine-containing core-shell acrylate emulsion are roughly the same as using OP-10.

[0036] In the preparation, the alkylphenol-based polyoxyethylene ether with better effect is nonylphenol-based polyoxyethylene ether (OP-10).

Embodiment 2

[0037] Example 2 Preparation of fluorine-containing core-shell acrylate emulsion

[0038] The preparation method of fluorine-containing core-shell acrylate emulsion includes two steps: reactive emulsifier preparation and fluorine-containing emulsion preparation.

[0039] See Example 1 for the preparation of reactive emulsifiers.

[0040] Preparation of fluorine-containing emulsion: take 0.5Kg of reactive emulsifier, 13Kg of methyl methacrylate and 8Kg of butyl acrylate to form a nucleus. Test the conversion rate during the reaction. When the nucleus monomer is about 85% polymerized, add methyl 8Kg of methyl acrylate, 13Kg of butyl acrylate, and 6Kg of dodecafluoroheptyl methacrylate. The reaction was continued for 2 hours to form a shell outside the core.

Embodiment 3

[0041] Example 3 Preparation of fluorine-containing core-shell acrylate emulsion

[0042] See Example 1 for the preparation of reactive emulsifiers.

[0043] Preparation of fluorine-containing emulsion: take 0.5Kg of reactive emulsifier, add 6.5Kg of methyl methacrylate, 4Kg of butyl acrylate, 5.5Kg of ethyl methacrylate, and 6Kg of butyl methacrylate to copolymerize four acrylate monomers. The reaction forms a nucleus. The conversion rate was tested in the reaction. When the core monomer was polymerized to be equal to or greater than 80%, 4Kg of methyl methacrylate, 6Kg of butyl acrylate, 4Kg of ethyl methacrylate, 3Kg of butyl methacrylate and methyl were added. Dodecafluoroheptyl acrylate 3Kg, five monomers are copolymerized outside the core to form a shell, and the reaction time is about 4 hours.

[0044] The effect of preparing the fluorine-containing core-shell acrylate emulsion is basically the same as that of Example 2.

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Abstract

An acrylate emulsion containing fluorine nuclear shell, its production and use are disclosed. The process is carried out by reacting maleic anhydride with alkyl phenolic polyethenoxy ether, regulating to indifference by sodium carbonate, copolymerizing for reactive emulsion and 2-4 kinds acrylate proportionally, adding into 2-4 kinds acrylate and methyl-acrylic dodecafluoptyl esters while polymerizing nuclear monomer, reacting for 1-4hrs and drying for 10mins. It has excellent weather-resistance, water-proof and anti-fouling performances and costs low.

Description

Technical field [0001] The invention belongs to the technical field of polymer chemistry, and particularly relates to a fluorine-containing core-shell emulsion for preparing water-based paint and a preparation method thereof. Background technique [0002] In recent years, driven by the industrial development principles of energy saving, capital saving and low pollution, the research and development of water-based emulsion coatings has received increasing attention, because water-based emulsion coatings have the advantages of convenient construction, low pollution and good stain resistance. [0003] JP99-05951 and JP04,164,990 (1992) used fluoroemulsifiers to prepare water-based fluororesins. CN1566234A discloses a water-based fluorine coating prepared by combining VDF / TEF / HFP terpolymer emulsion and polyacrylate emulsion with a curing temperature of 120-130°C and excellent stain resistance and weather resistance. [0004] The prior art similar to the present invention is a method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F2/24C09D133/10C09D5/02C09D5/14
Inventor 王静媛李亚鹏吴明致王书唯王薇
Owner JILIN UNIV
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