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Normal temperature curing fluorocarbon resin emulsion for back sheet film and its preparation method and application

A fluorocarbon resin emulsion, curing technology at room temperature, applied to coatings, fireproof coatings, etc., can solve the problems of affecting the weather resistance of fluorocarbon coatings such as humidity and heat resistance, poor storage stability of emulsions, and easy caking during long-term storage. Excellent storage stability, low aging yellowing value and fast polymerization rate

Active Publication Date: 2021-12-07
SHANDONG HUAXIA SHENZHOU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Chinese patent CN1362422A adopts a semi-continuous emulsion polymerization method to prepare a water-based fluororesin. The one-component water-based fluorine coating made by the fluororesin is easy to use and has good performances such as aging resistance, water resistance and alkali resistance. However, due to its No cross-linking reaction occurs during film formation, so it has poor solvent resistance
[0009] Great progress has been made in the research and development of two-component water-based fluorocarbon resin emulsions for room-temperature curable coatings. For example, the patent CN10586968 has a fluorine content of more than 18% compared with water-based one-component FEVE resins, but the storage stability of the emulsions Poor performance, easy to agglomerate in long-term storage, and need to prepare curing agent before use, which brings inconvenience to construction
[0010] Chinese patents CN101434674 and CN102532436 both use polymers with high fluorine content as the core and acrylic acid as the shell structure, which ensures the storage stability of the emulsion, but the preparation process is relatively complicated, and the fluorine content is generally low, which affects the performance of fluorocarbon coatings. Weather resistance such as humidity and heat resistance

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  • Normal temperature curing fluorocarbon resin emulsion for back sheet film and its preparation method and application

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Embodiment 1

[0042] The preparation method of the fluorocarbon resin emulsion of the present embodiment comprises the following steps:

[0043] (1) Preparation of pre-emulsion: Add 180 g of deionized water, 30 g of dodecafluoroheptyl acrylate, 50 g of methyl methacrylate, 30 g of methylol acrylamide, and composite emulsifier (10 g 2 , 3,5,6-tetrafluoro-4-hydroxybenzenesulfonate and 10gNP-10) 20g, potassium persulfate 0.8g and sodium bisulfite 0.8g, stirred to obtain a pre-emulsion;

[0044] (2) Vacuumize the pre-emulsion obtained in step (1), and add 45 g of tetrafluoroethylene into the polymerization reactor after nitrogen replacement and deoxygenation, and stir. Turn on the constant temperature device, control the reaction temperature through the cooling temperature control device, and react for 9 hours after reaching the reaction temperature of 45°C;

[0045](3) After the reaction in step (2), cool down to room temperature, and filter the mixed solution to obtain the fluorocarbon resin...

Embodiment 2

[0047] The preparation method of the fluorocarbon resin emulsion of the present embodiment comprises the following steps:

[0048] (1) Preparation of pre-emulsion: Add 200 g of deionized water, 40 g of trifluoroethyl methacrylate, 50 g of vinyl ether, 30 g of diacetone acrylamide, and a composite emulsifier (10 g2,3, 5,6-tetrafluoro-4-hydroxybenzenesulfonate and 10g OP-10) 20g, ammonium persulfate 0.8g and sodium bisulfite 0.8g, stirred to obtain a pre-emulsion;

[0049] (2) Vacuumize the pre-emulsion obtained in step (1), and add 60 g of chlorotrifluoroethylene into the polymerization reactor after nitrogen replacement and deoxygenation, and stir. Turn on the constant temperature device, control the reaction temperature through the cooling temperature control device, and react for 8 hours after reaching the reaction temperature of 60°C;

[0050] (3) After the reaction in step (2), cool down to room temperature, and filter the mixed solution to obtain the fluorocarbon resin e...

Embodiment 3

[0052] The preparation method of the fluorocarbon resin emulsion of the present embodiment comprises the following steps:

[0053] (1) Preparation of pre-emulsion: Add 180 g of deionized water, 30 g of hexafluorobutyl methacrylate, 50 g of vinyl n-butyl ether, 30 g of acrylamide, and a composite emulsifier (10 g of heptadecanofluoride) into a 1 L polymerization reactor. Potassium octanesulfonate and 10g TW-80) 20g, potassium persulfate 0.6g and sodium bisulfite 0.6g, stir to obtain pre-emulsion;

[0054] (2) Vacuumize the pre-emulsion obtained in step (1), replace oxygen with nitrogen, and add 45 g of hexafluoropropylene into the polymerization reactor, and stir. Turn on the constant temperature device, control the reaction temperature through the cooling temperature control device, and react for 9 hours after reaching the reaction temperature of 30°C;

[0055] (3) After the reaction in step (2), cool down to room temperature, and filter the mixed solution to obtain the fluor...

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Abstract

The invention discloses a room-temperature-cured fluorocarbon resin emulsion for a backplane film, a preparation method and application thereof, and belongs to the technical field of backplane films. The technical solution is: use fluorine-containing surfactant and nonionic emulsifier as combined emulsifier, use fluorine-containing acrylic monomer, non-fluorine monomer, acrylamide monomer and fluorine-containing olefin monomer as reactive monomers to perform emulsion polymerization way to obtain a fluoropolymer emulsion. The emulsion prepared by the present invention has high fluorine content, enhanced weather resistance, and excellent storage stability, and the back sheet film obtained by coating the emulsion and rapidly curing at a high temperature above 100°C has good adhesion to the substrate, and is resistant to high temperatures. The aging yellowing value is low in a high-humidity environment, which meets the weather resistance requirements of fluorocarbon coatings for photovoltaic backplane films, and can realize an environmentally friendly alternative to solvent-based fluorocarbon resin solutions for photovoltaic backplanes.

Description

technical field [0001] The invention relates to the technical field of backplane films, in particular to a room-temperature-cured fluorocarbon resin emulsion for backplane films, a preparation method and application thereof. Background technique [0002] Water-based fluorocarbon resin emulsion is a kind of special polymer material that has developed extremely rapidly in recent years, and is mainly used as a coating base material. It has excellent properties such as safety and environmental protection, good construction, alkali resistance, water resistance, aging resistance, scrubbing resistance, weather resistance, radiation resistance, low temperature cross-linking and curing, and is widely used in building interior and exterior wall coatings and other places with relatively high environmental protection requirements ( Such as aircraft interior, ship interior, automobile interior, etc.) have attracted great attention from all over the world. With the continuous improvement ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/24C08F220/58C08F216/18C08F220/56C09D133/12C09D129/10
CPCC08F216/18C08F220/14C08F220/24C09D5/18C09D129/10C09D133/24C08F220/58C08F220/56
Inventor 马慧荣王汉利潘晨光王磊刘德鹏
Owner SHANDONG HUAXIA SHENZHOU NEW MATERIAL