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Oxidized graphene/waterborne polyurethane acrylate composite emulsion and preparation method and application thereof

A polyurethane acrylate and composite emulsion technology, which is applied in coatings, anti-corrosion coatings, fire-retardant coatings, etc., can solve the problem of no anti-corrosion performance, and achieve the effects of enhancing anti-corrosion performance, improving compactness and improving adhesion.

Inactive Publication Date: 2017-05-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no research and application of waterborne polyurethane polyacrylate (WPUA) composite emulsion coatings combined with graphene oxide (GO) for their anti-corrosion properties.

Method used

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  • Oxidized graphene/waterborne polyurethane acrylate composite emulsion and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Preparation of graphite oxide by improved Hummers method

[0039] The synthesis process of graphene oxide is as follows: First, prepare graphite oxide by the improved Hummers method, take 2g of natural flake graphite, 1g of sodium nitrate and 96g of concentrated sulfuric acid and slowly add them in sequence to a 500ml three-necked flask, and stir in an ice-water bath After reacting for 30 minutes, 6 g of oxidant (potassium permanganate) was gradually added, and the reaction was continued for 2 hours with stirring in an ice-water bath. Then slowly move the flask into a constant temperature water bath at 30-35°C, stir for another 3 hours, keep stirring and slowly add 190 g of deionized water dropwise, continue stirring for 1 hour, then cool to room temperature, and then add an appropriate amount of 30% H 2 o 2 , the solution turned bright yellow. Stand still, filter, and wash the filter cake fully with 5% HCl solution until there is no SO in the filtrate 4 2- (with...

Embodiment 2

[0046] 1) First, add 19 parts of a mixture of methyl methacrylate (MMA) and butyl acrylate (BA) (the mass ratio of MMA to BA is 4:1), 7 parts of isofor Alone diisocyanate, 10 parts of polycaprolactone diol, 2 parts of dimethylolpropionic acid, 1 part of trimethylolpropane, the reaction temperature is constant at 75-85°C, and the reaction time is 3 hours.

[0047] 2) Next, add 1.5 parts of hydroxyethyl methacrylate to the system for capping, stir and react for 0.5 hours, keep the temperature of the system at 75-85°C, then add 1.5 parts of triethylamine, and neutralize for 0.5 hours , add 65 parts of an aqueous dispersion containing 0.03 parts of sodium α-olefin sulfonate and 1 part of graphene oxide, stir and disperse at high speed for 5-10 minutes, and keep the constant temperature at 75-85°C.

[0048] 3) Finally, at a constant temperature of 75 to 85°C, continue to drop 20 parts of an aqueous solution containing 0.5 parts of ammonium persulfate, and after 1.5 hours of reactio...

Embodiment 3

[0050] 1) First, add 19 parts of a mixture of methyl methacrylate (MMA) and butyl acrylate (BA) (the mass ratio of MMA to BA is 4:1), 7 parts of isofor Alone diisocyanate, 10 parts of polycaprolactone diol, 2 parts of dimethylolpropionic acid, 1 part of trimethylolpropane, the reaction temperature is constant at 75-85°C, and the reaction time is 3 hours.

[0051] 2) Next, add 1.5 parts of hydroxyethyl methacrylate to the system for capping, stir and react for 0.5 hours, keep the temperature of the system at 75-85°C, then add 1.5 parts of triethylamine, and neutralize for 0.5 hours , add 65 parts of an aqueous dispersion containing 0.03 parts of sodium α-olefin sulfonate and 3 parts of graphene oxide, stir and disperse at high speed for 5-10 minutes, and keep the constant temperature at 75-85°C.

[0052] 3) Finally, at a constant temperature of 75 to 85°C, continue to drop 20 parts of an aqueous solution containing 0.5 parts of ammonium persulfate, and after 1.5 hours of reacti...

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Abstract

The invention discloses oxidized graphene / waterborne polyurethane acrylate composite emulsion and a preparation method and an application thereof. The preparation method comprises the following steps: using an in-situ polymerization method, and using vinyl monomer as a continuous phase, and using polyester polyol, diisocyanate, a hydrophilic chain extender, and an inner-crosslinking agent as raw materials for preparing a polyurethane prepolymer and vinyl monomer mixture, end-capping by vinyl, neutralizing by antalkali, and adding aqueous dispersion containing polymerizable surfmer and the oxidized graphene for dispersing in high speed, and then dripping a water-soluble initiator and an outer-crosslinking agent, enabling the vinyl monomer to polymerize with the polyurethane, the oxidized graphene and double-bond-contained surface active monomer, and preparing the oxidized graphene / waterborne polyurethane acrylate composite emulsion. The oxidized graphene / waterborne polyurethane acrylate composite emulsion is used for not only improving the heat resistance of the coating effectively, but also improving the surface salt fog resistance and antiseptic property of the coating. The preparation process of the product is simple, the raw materials can be easily obtained, and the product is easy to promote and apply in the actual industry.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of a water-based anti-corrosion coating and a preparation method thereof, in particular to a graphene oxide / water-based polyurethane acrylate composite emulsion and a preparation method and application thereof. [0003] 【Background technique】 [0004] With the strengthening of people's awareness of environmental protection, the scope of use of solvent-based coatings is limited, and the research on water-based coatings has been paid more and more attention. The anti-corrosion performance of waterborne polyurethane polyacrylate (WPUA) composite emulsion coating can meet the needs of general anti-corrosion coatings, but the performance in the field of heavy-duty anti-corrosion coatings still needs to be further improved. Graphene oxide (GO) has a large number of oxygen-containing groups attached to its two-dimensional surface, such as carbonyl, hydroxyl, carboxyl, and epoxy groups. Part of the oxygen-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/14C08F220/18C08F230/08C08F220/32C08F2/44C08G18/67C08G18/66C08G18/42C08G18/34C08G18/32C09D151/08C09D5/08
CPCC08F283/008C08F2/44C08G18/0823C08G18/3206C08G18/348C08G18/4277C08G18/6659C08G18/672C08K3/04C08K7/00C08K2201/011C09D5/08C09D5/18C09D151/08C08F220/14
Inventor 王海花李菁熠费贵强郭丹慧孙立宇
Owner SHAANXI UNIV OF SCI & TECH
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