Preparation method of waterborne epoxy soybean oil modified epoxy-ester anticorrosive paint

A technology of epoxidized soybean oil and water-based epoxy, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problem that salt spray resistance cannot meet the requirements of cars, reduce resin cross-linking active points, and cross-linking Density reduction and other problems, to achieve excellent salt spray corrosion resistance, excellent mechanical properties, good construction effect

Inactive Publication Date: 2018-04-17
陕西宝塔山油漆股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This product system has an amino resin crosslinking agent, which needs to be cured at 120-140°C, and the salt spray resistance can only be achieved for 240 hours. Curing at such a high temperature requires a lot of energy consumption, which cannot meet the current axle coating requirements. Low temperature (70-90°C) baking conditions, and the salt spray resistance does not meet the requirements of the car
As we all know, any kind of ingredients modifying the resin will have more or less influence on the inherent properties of the original resin. Epoxy ester resin itself has good wet adhesion and anti-corrosion performance. By modifying with acrylic acid, the drying performance is indeed Increased, but after modification, the cross-linking active point of the resin is reduced, and the cross-linking density is reduced, which directly leads to the decline of anti-corrosion performance

Method used

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  • Preparation method of waterborne epoxy soybean oil modified epoxy-ester anticorrosive paint
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  • Preparation method of waterborne epoxy soybean oil modified epoxy-ester anticorrosive paint

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preparation example Construction

[0039] The preparation method of water-based epoxy soybean oil modified epoxy ester anticorrosion coating of the present invention may further comprise the steps:

[0040] (1) Preparation of epoxy soybean oil modified epoxy ester resin:

[0041]1) Synthesis of resin: E-44 epoxy resin with a mass fraction of 15 to 20 parts, 20 to 30 parts of dehydrated ricinoleic acid, 5 to 10 parts of maleic anhydride and 16 to 28 parts of ethylene glycol butylene Measure 5-10 parts of ether into a four-necked flask, gradually raise the temperature to 150°C, and keep it warm for 30 minutes. After the maleic anhydride is completely dissolved, pass in N 2 , start stirring, and then rapidly raise the temperature to 220-240°C and keep it for 2-3 hours. After the detection of acid value reaches 5-10mgKOH / g, drop to 100°C, add 10-15 parts of epoxidized soybean oil, and then dropwise add 5-10 acrylic acid, 3-8 parts methacrylic acid, 0.5-0.8 parts triphenylphosphine catalyst, 0.05-0.2 parts hydroxya...

Embodiment 1

[0051] (1) Preparation of 45% water-based epoxy soybean oil modified epoxy ester resin:

[0052] 1) Synthesis of resin: Add 15 parts of E-44 epoxy resin, 30 parts of dehydrated ricinoleic acid, 5 parts of maleic anhydride, and 5 parts of ethylene glycol butyl ether into a four-necked flask, and gradually heat up To 150°C, keep warm for 30min, after the maleic anhydride is completely dissolved, pass N 2 , start stirring, and then rapidly raise the temperature to 220°C and keep it for 3 hours. After the acid value reaches 10mgKOH / g, drop to 100°C, add 15 parts of epoxy soybean oil, then dropwise add 8 parts of acrylic acid and 3 parts of methacrylic acid , 0.8 parts of triphenylphosphine catalyst, 0.2 parts of the mixture of hydroxyanisole polymerization inhibitor, gradually warming up to 110 ° C, after 1 hour of insulation esterification, the acid value reached 40 mgKOH / g, cooling to 60 ° C, adding 18 part of ethylene glycol butyl ether solvent, adjust the solid content to 70±...

Embodiment 2

[0057] (1) Preparation of 45% water-based epoxy soybean oil modified epoxy ester resin:

[0058] 1) Synthesis of resin: Add 20 parts of E-44 epoxy resin, 27 parts of dehydrated ricinoleic acid, 8 parts of maleic anhydride, and 8 parts of ethylene glycol butyl ether into a four-necked flask, and gradually heat up To 150°C, keep warm for 30min, after the maleic anhydride is completely dissolved, pass N 2 , start stirring, then rapidly raise the temperature to 230°C and keep it for 2 hours. After the acid value reaches 10mgKOH / g, drop to 100°C, add 12 parts of epoxy soybean oil, then dropwise add 5 parts of acrylic acid and 4.3 parts of methacrylic acid , 0.5 parts of triphenylphosphine catalyst, 0.2 parts of hydroxyanisole polymerization inhibitor mixture, gradually warming up to 110 ° C, after 2 hours of heat preservation esterification, the acid value reached 30 mgKOH / g, cooling to 50-60 ° C, adding 15 parts of ethylene glycol butyl ether solvent, adjust the solid content to ...

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Abstract

The invention discloses a waterborne epoxy soybean oil modified epoxy-ester anticorrosive paint and its preparation method. The paint is prepared by 1), preparing 45% of waterborne epoxy soybean oil modified epoxy-ester resin; 2), preparing resin-free mill the raw material comprises deionized water, wetting agent, dispersing agent, antifoaming agent 1, strontium yellow, imported zinc phosphate, carbon black, precipitated barium sulphate and waterborne bentonite; 3), paint mixing: the resin-free mill base, 45% of waterborne epoxy soybean oil modified epoxy-ester resin, drier, antifoamingagent 2, dimethylethanolamine, and thickening agent are mixed to obtain the waterborne epoxy soybean oil modified epoxy-ester anticorrosive paint. The product is excellent in salt-spray corrosion resistance, and can meet the use of an axle under the high salt-spray corrosion resistance environment; the product is good in dryness and can meet the requirement of the existing axle coating line; the thickness of a dry film of a primary film is up to 60 mu m, and the product is free from sagging and good in construction property; the paint is short in coating cycle, low in VOC emission, and is safeand environment-friendly waterborne heavy anti-corrosive paint.

Description

technical field [0001] The invention relates to the technical field of organic macromolecular synthetic materials, in particular to an anti-corrosion coating suitable for vehicle axles and a preparation method thereof. Background technique [0002] With the rapid growth of transport vehicles, the amount of supporting axles is also increasing, because the environment of the axles is complex and changeable, these factors include extreme high and low temperatures, various high humidity, rain and snow, and high salt spray Corrosive atmosphere, oil, mud and other pollution. The harsh working environment will damage the coating film of the axle, which will cause the axle to be corroded, which will seriously affect the service life of the axle in the long run. For the axle, the corrosion resistance of its coating film is particularly important. At present, the domestic coatings used for car anticorrosion are still mainly solvent systems. During the spraying construction of the axl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/10C09D5/08C09D7/61C09D7/20C09D17/00C08G59/17
CPCC09D163/10C08G59/1466C08K3/04C08K3/346C08K13/02C08K2003/3045C08K2003/328C09D5/08C09D17/005
Inventor 夏克龙薛丹徐涛薛宗华吕欢欢刘宪文陈安强
Owner 陕西宝塔山油漆股份有限公司
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