Polyester resin for coiled material finishing paint and its preparing process
A technology of polyester resin and topcoat, which is applied in the field of polyester resin for coil topcoat and its preparation, which can solve the problems of high price and achieve high cost performance, good stability and good color retention
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Examples
Embodiment 1
[0036] Embodiment 1, with 115.5 kilograms of neopentyl glycol, 30 kilograms of trimethylolpropane, 17.5 kilograms of pentaerythritol, 35 kilograms of hexanediol, 58.5 kilograms of adipic acid, 81.5 kilograms of 1,4 cyclohexane Diformic acid, 140 kilograms of 1,2 cyclohexanedicarboxylic acid was added to the reaction kettle, slowly heated to 160 ° C, after melting, 1.7 kg of dibutyltin dilaurate catalyst was added, and continued heating to 225 ° C, the reaction time was controlled at 9.5 hours, Finally, the reaction reaches acid value 3mgKOH / g, viscosity 12 seconds, 48 kilograms of water output, then with 17 kilograms of dimethylbenzene, 229 kilograms of heavy aromatics solvent containing C9-C10 ("Solvesso 150 mesitylene product" produced by U.S. Exxon Company) ), 53 kilograms of propylene glycol methyl ether acetate and 54 kilograms of dibasic esters were diluted to a solid content of 55%, filtered, and packaged.
[0037] The performance test is as follows:
[0038] ...
Embodiment 2
[0039] Embodiment 2, with 135 kilograms of neopentyl glycol, 45 kilograms of trimethylolpropane, 12 kilograms of pentaerythritol, 23 kilograms of hexanediol, 67 kilograms of adipic acid, 86 kilograms of 1,4 cyclohexane Diformic acid, 147 kg of 1,2 cyclohexanedicarboxylic acid was added to the reaction kettle, slowly heated to 170 °C, after melting, 1.8 kg of dimethyl tin diacetate catalyst was added, and continued heating to 230 °C, the reaction time was controlled at 9 hours , the final reaction reaches an acid value of 5 mgKOH / g, a viscosity of 15 seconds, and a water output of 52 kg, and then 12 kg of xylene, 173 kg of heavy aromatic solvents containing C9-C10, 64 kg of propylene glycol methyl ether acetate and 60 kg of dibasic acid Dilute the ester to a solid content of 60%, filter and pack.
[0040] The performance test is as follows:
[0041] project
Embodiment 3
[0042] Embodiment 3, with 109 kilograms of neopentyl glycol, 10 kilograms of tertiary carbonic acid glycidyl ester, 56 kilograms of trimethylolpropane, 20 kilograms of pentaerythritol, 35 kilograms of hexanediol, 75 kilograms of adipic acid, Add 108 kg of 1,4 cyclohexanedicarboxylic acid and 135 kg of 1,2 cyclohexanedicarboxylic acid into the reactor, slowly heat to 180°C, add 2 kg of dibutyl tin diacetate catalyst after melting, and continue heating to 235°C, the reaction time is controlled at 8 hours, and the final reaction reaches an acid value of 8 mgKOH / g, a viscosity of 17 seconds, and a water output of 57 kg, and then 13 kg of xylene, 156 kg of heavy aromatic solvents containing C9-C10, and 66 kg of propylene glycol methyl Dilute ether acetate and 30 kg of dibasic acid ester to a solid content of 65%, filter, and pack.
[0043] The performance test is as follows:
[0044] project
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Abstract
Description
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