Super-weather-resistant and gas-resistant HAA cured polyester resin composition and powder coating
A polyester resin and powder coating technology, applied in powder coatings, polyester coatings, fireproof coatings, etc., can solve the problems of inability to achieve super weather resistance, achieve stable gloss, good coating leveling, and reduce the amount of curing agent.
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Embodiment 1
[0022] This embodiment provides a super weather-resistant and gas-resistant HAA cured polyester resin composition. The raw material components and qualities of the high acid value polyester resin and the low acid value polyester resin are shown in Table 1.
[0023] The preparation method of the high acid value polyester resin is as follows: put dihydric alcohol and trihydric alcohol into the reactor, heat the reactor to 90°C and start stirring, then put in dibasic acid and esterification catalyst, and slowly raise the temperature to 241°C , maintain the reaction until the acid value is 8.5mgKOH / g, lower the temperature of the kettle to 222°C, put in the heat stabilizer and dibasic acid, then raise the temperature to 233°C, maintain the reaction to the acid value of 52.8mgKOH / g, at 226°C evacuated at -0.098MPa for 2.0h to make the acid value 43.5mgKOH / g, then the temperature of the kettle was lowered to 185°C, and an antioxidant was added to maintain it for 25min.
[0024] The ...
Embodiment 2
[0028] This embodiment provides a super weather-resistant and gas-resistant HAA cured polyester resin composition. The raw material components and qualities of the high acid value polyester resin and the low acid value polyester resin are shown in Table 1.
[0029] The preparation method of the high acid value polyester resin is as follows: put dihydric alcohol and trihydric alcohol into the reactor, heat the reactor to 95°C and start stirring, then put in dibasic acid and esterification catalyst, and slowly heat up to 243°C , maintain the reaction until the acid value is 9.8mgKOH / g, lower the temperature of the kettle to 225°C, put in heat stabilizer and dibasic acid, then raise the temperature to 235°C, maintain the reaction to the acid value of 54.3mgKOH / g, at 235°C evacuated at -0.095MPa for 2.3h to make the acid value 41.8mgKOH / g, then lower the temperature of the kettle to 195°C, put in antioxidant and keep it for 20min.
[0030] The preparation method of the low-acid va...
Embodiment 3
[0034]This embodiment provides a super weather-resistant and gas-resistant HAA cured polyester resin composition. The raw material components and qualities of the high acid value polyester resin and the low acid value polyester resin are shown in Table 1.
[0035] The preparation method of the high acid value polyester resin is as follows: put dihydric alcohol and trihydric alcohol into the reactor, heat the reactor to 110°C and start stirring, then put in dibasic acid and esterification catalyst, and slowly raise the temperature to 245°C , maintain the reaction until the acid value is 11.1mgKOH / g, lower the temperature of the kettle to 227°C, put in the heat stabilizer and dibasic acid, then raise the temperature to 240°C, maintain the reaction to the acid value of 55.9mgKOH / g, at 233°C evacuated at -0.097MPa for 3.2h, so that the acid value was 45.3mgKOH / g, and then the temperature of the kettle was lowered to 205°C, and an antioxidant was added to maintain it for 15min.
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