Transparent nucleating agent, and preparation method and application thereof
A transparent nucleating agent, C1-C12 technology, applied in the preparation of carboxylate, carboxylate, urea derivatives, etc., can solve the problems of not being able to directly transmit light, opacity of crystalline polymers, etc., to improve aesthetics, The effect of changing the crystallization temperature and increasing the crystallization speed
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[0046] Example 1: Preparation of 4-tert-butylbenzoic acid uramide salt
[0047]
[0048] In a four-necked flask, add 250mL formic acid, 17.82g (0.1mol) 4-tert-butyl benzoic acid and 6g carbamide, and heat for 3 hours under the conditions of pH 7.5 and temperature 50°C while refluxing After stirring, the crystals were concentrated to obtain 20 g of white solid with a yield of 83.4%.
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[0049] Example 2: Preparation of 4-tert-butyl benzoic acid amine salt
[0050]
[0051] In a four-necked flask, add 400mL water, 17.82g (0.1mol) 4-tert-butylbenzoic acid and 7mL 25% ammonia water, heat for 1.5 hours under the conditions of pH 8 and temperature 55 ℃, while refluxing After stirring, the crystals were concentrated to obtain 16 g of white solid with a yield of 83.4%.
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[0052] Example 3: Preparation of 4-tert-butyl-N,N-dimethyl-benzoic acid amine salt
[0053]
[0054] In a four-necked flask, add 400mL methanol, 200mL ethanol, 17.82g (0.1mol) 4-tert-butylbenzoic acid and 11.25mL 40% dimethylamine aqueous solution, under the condition of pH 7.5 and temperature 60℃ It was heated for 2 hours while stirring under reflux, and then concentrated and crystallized to obtain 17 g of white solid with a yield of 76%.
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