Polyester resin special for winding steel paint base and preparation thereof
A technology of polyester resin and primer, applied in polyester coatings, coatings, anti-corrosion coatings, etc., can solve the problems of limited processing performance of pre-coated coils, poor pertinence, and failure to achieve processing effects, etc., to achieve Ease of large-scale production, low requirements for production equipment, and high solid content
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[0025] Example 1:
[0026] A special polyester resin for the primer in coil coatings, which includes the following components by weight:
[0027] 35 parts of ethylene glycol
[0028] 35 parts of terephthalic acid
[0029] 0.1 part of dibutyl tin dilaurate
[0030] Xylene 3 parts
[0031] 20 parts of ethylene glycol butyl ether.
[0032] The production method is as follows:
[0033] 1. Fill a reactor equipped with a stirrer, a thermometer (including two thermometers: one for measuring the temperature of the liquid phase and the other for measuring the temperature of the gas phase), a reflux condenser, and a water separator. Phthalic acid and catalyst dibutyl tin dilaurate, pass N 2 Protect, start to heat up. Start stirring intermittently when the material is 160°C. Observe the material in the kettle until the material is completely dissolved before starting the stirring. Control the temperature of the liquid material in the kettle between 150~250℃, and the temperature of the gas ph...
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[0036] Example 2:
[0037] A special polyester resin for the primer in coil coatings, which includes the following components by weight:
[0038] 40 parts glycerin
[0039] 40 parts of trimellitic anhydride
[0040] 0.1 part of dibutyl tin diacetate
[0041] S-100# 3 copies
[0042] 20 parts of cyclohexanone.
[0043] The production method is as follows:
[0044] 1. A reactor equipped with a stirrer, a thermometer (including two thermometers: one for measuring the temperature of the liquid phase and the other for measuring the temperature of the gas phase), a reflux condenser, and a water separator are filled with the formula amount of glycerin, trimellitic anhydride and catalyst Dibutyltin diacetate with CO 2 Protect, start to heat up. Start stirring intermittently when the material is 160°C. Observe the material in the kettle until the material is completely dissolved before starting the stirring. Control the temperature of the liquid material in the kettle between 150~250℃, and...
Example Embodiment
[0047] Example 3:
[0048] A special polyester resin for the primer in coil coatings, which includes the following components by weight:
[0049] 30 parts of pentaerythritol
[0050] 30 parts of isophthalic acid
[0051] 0.1 part of monobutyl tin oxide
[0052] Xylene 3 parts
[0053] 20 parts of n-butanol.
[0054] The production method is as follows:
[0055] 1. Fill a reactor equipped with a stirrer, a thermometer (including two thermometers: one for measuring the temperature of the liquid phase and the other for measuring the temperature of the gas phase), a reflux condenser, and a water separator with a formula amount of pentaerythritol and isophthalic acid. Formic acid and catalyst monobutyl tin oxide, pass N 2 Protect, start to heat up. Start stirring intermittently when the material is 160°C. Observe the material in the kettle until the material is completely dissolved before starting the stirring. Control the temperature of the liquid material in the kettle between 150~25...
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