Modified phenol-formaldehyde resin and applications thereof in anticorrosion coating
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A phenolic resin, anti-corrosion coating technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., to achieve the effect of high bond strength
Inactive Publication Date: 2015-06-10
QINGDAO HUICHENG PETROCHEM TECH
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[0004] The purpose of the present invention is to use α, β-furan acrolein instead of formaldehyde to synthesize modified phe
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Embodiment 1
[0026] A, a, preparation of β-furan acrolein
[0027] Inject N into the mouth of the flask 2 For about 10 minutes, adjust the temperature of the water bath to 40°C, slowly add 20ml of furfural dropwise into the syringe and start the mixer to stir evenly. React for 3 hours, filter and wash with deionized water until neutral, and dry over anhydrous magnesium sulfate to obtain a reddish-brown oily transparent liquid, which is 3-furyl 2-ethylacrolein.
[0028] The prepared 3-furyl-2-ethyl-acrolein has a molecular weight of 150g / mol, a density of 1.079g / cm3, and a boiling range of 208-210°C.
[0029] B. Synthesis of modified phenolic resin
[0030] Equipped with reflux condenser, stirrer, thermometer and N 2 Add 37.6g of phenol and 0.3g of sodium hydroxide catalyst into the four-necked flask with gas inlet, heat to 150°C, and drop 30.0g of 3-furyl-2-ethyl-acrolein into the reaction system at a speed of 5 seconds / drop During the reaction, keep the temperature for 2 hours. After ...
Embodiment 2
[0037] A. Preparation of α, β-furan acrolein
[0038] Take 31ml of n-valeraldehyde in a four-neck flask, install a condensing device, and feed N into one mouth of the flask. 2 For about 10 minutes, adjust the temperature of the water bath to 45°C, add 2.0g of sodium hydroxide and slowly add 20ml of furfural dropwise, and start the mixer to stir evenly. React for 3 hours, filter and wash with deionized water until neutral, and dry over anhydrous magnesium sulfate to obtain a reddish-brown oily transparent liquid, which is 3-furyl-2-propylacrolein.
[0039] The prepared 3-furyl-2-propyl-acrolein has a molecular weight of 164g / mol, a density of 1.021g / cm3, and a boiling range of
[0040] 224~226℃.
[0041] B. Synthesis of modified phenolic resin
[0042] Equipped with reflux condenser, stirrer, thermometer and N 2 Add 28.2g of phenol and 0.7g of sodium carbonate catalyst into the four-necked flask with gas inlet, heat to 150°C, and drop 32.8g of 3-furyl-2-propyl-acrolein into...
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Abstract
The invention relates to novel modified phenol-formaldehyde resin, and preparation of modified phenol-formaldehyde/epoxy resin anticorrosion coating by utilization of the modified phenol-formaldehyde resin and epoxy resin. Aiming at characteristics of traditional phenol-formaldehyde resin raw materials, high toxicity, high volatility, high irritation, and the like of formaldehyde, alpha, beta-furylacrolein which is high in boiling point, low in volatility and low in toxicity in place of formaldehyde is adopted to synthesize the modified phenol-formaldehyde resin with phenol, a furan ring and a flexible side chain are introduced into the modified phenol-formaldehyde resin, furan resin is formed and system brittleness is improved. The modified phenol-formaldehyde resin can be widely applied to the fields of plastic, glass fiber reinforced plastic, amine mud, amine adhesives, coating and the like. The modified phenol-formaldehyde/epoxy resin anticorrosion coating is prepared from the modified phenol-formaldehyde resin and the epoxy resin, has excellent properties of the epoxy resin and the furan resin, such as high adhesion force, acid resistance, alkali resistance, resistance to high temperature and ageing resistance, and can be used as coating for boats, oil tanks, pipes, and other structural objects.
Description
technical field [0001] The invention relates to a polymer anticorrosion coating, in particular to an anticorrosion coating using modified phenolic / epoxy resin as a film-forming agent. Background technique [0002] In 1872, German chemist Bayer synthesized phenol-formaldehyde resin for the first time in the laboratory. This is the first synthetic resin and the first synthetic polymer compound created by mankind. Phenol-formaldehyde resin, named Laccaino, has been studied for a long time, and people have made great progress in the synthesis theory of phenolic resin, category expansion, resin performance improvement, etc., and its application fields are also expanding. In terms of anti-corrosion, phenolic resin is often used as an anti-corrosion material for pipelines, vehicles and ships due to its advantages of heat resistance, acid resistance, alkali resistance, flame retardant, and good electrical insulation. However, the phenolic resin after cross-linking and curing has hi...
Claims
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