Modified tetrahydrophthalic acid diglycidyl acylic ester, preparation method and application
A technology of tetrahydrophthalic acid and phthalic acid, applied in the direction of coating, etc., can solve the problems of skin irritation, poor flexibility, high production cost, and achieve excellent water resistance and solvent resistance, stretching The effect of high strength and fast curing speed
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Embodiment 1
[0020] (1) Preparation of tetrahydrophthalate diglycidyl acrylate: add 50g of tetrahydrophthalate diglycidyl acrylate in the reactor equipped with condenser, mechanical stirring, constant pressure dropping funnel and thermometer, Heat the oil bath to 60°C and start dropwise adding 25.7g of acrylic acid dissolved with 0.8g of tetraethylammonium bromide and 0.076g of p-hydroxyanisole, and control the rate of addition to complete the dropwise addition within half an hour, and raise the temperature while adding; After the dropwise addition, control the temperature at about 100°C, and stop the reaction when the acid value of the system drops to 5mgKOH / g;
[0021] (2) Preparation of isocyanate-modified tetrahydrophthalic acid diglycidyl acrylate: the tetrahydrophthalic acid diglycidyl acrylate prepared in the first step is reacted according to the molar ratio of isocyanate group to hydroxyl group of 0.5 Add 75g of the ester into the reactor equipped with a stirrer, a condenser, and ...
Embodiment 2
[0025] (1) Preparation of tetrahydrophthalate diglycidyl acrylate: add 50g of tetrahydrophthalate diglycidyl acrylate in the reactor equipped with condenser, mechanical stirring, constant pressure dropping funnel and thermometer, Heat the oil bath to 60°C and start dropwise adding 25.7 g of acrylic acid dissolved with 0.9 g of tetrabutylammonium bromide and 0.08 g of hydroquinone, and control the rate of addition to complete the dropwise addition within half an hour, and raise the temperature while adding. After the dropwise addition, the temperature is controlled at about 100°C, and the reaction is terminated when the acid value of the system drops to 5 mgKOH / g.
[0026] (2) Preparation of isocyanate-modified tetrahydrophthalic acid diglycidyl acrylate: the tetrahydrophthalic acid diglycidyl acrylate prepared in the first step is reacted according to the ratio of isocyanate group to hydroxyl molar ratio of 0.1 Add 75g of the ester into the reactor equipped with a stirrer, a c...
Embodiment 3
[0030] (1) Preparation of tetrahydrophthalate diglycidyl acrylate: add 50g of tetrahydrophthalate diglycidyl acrylate in the reactor equipped with condenser, mechanical stirring, constant pressure dropping funnel and thermometer, Heat the oil bath to 60°C and start to add 25.7 g of acrylic acid dissolved in 1.0 g of triethanolamine and 0.076 g of p-hydroxyanisole dropwise. The dropping rate is controlled to complete the dropwise addition within half an hour, and the temperature is raised while adding. After the dropwise addition, the temperature is controlled at about 100°C, and the reaction is terminated when the acid value of the system drops to 5 mgKOH / g.
[0031] (2) Preparation of isocyanate-modified tetrahydrophthalic acid diglycidyl acrylate: the tetrahydrophthalic acid diglycidyl acrylate prepared in the first step is reacted according to the molar ratio of isocyanate group and hydroxyl group to 0.4 Add 75g of the ester into the reactor equipped with a stirrer, a conde...
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