Cyclohexanone-bisphenol A-formaldehyde polycondensation resin and preparation method thereof
A technology of co-condensation resin and cyclohexanone, which is applied in the field of cyclohexanone-bisphenol A-formaldehyde co-condensation resin and its preparation, can solve the problems of poor anti-powdering ability, low anti-yellowing performance, low softening point, etc.
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[0037] see figure 1 , the preparation method of the cyclohexanone-bisphenol A-formaldehyde polycondensation resin of one embodiment, comprises the following steps:
[0038] S110, adding a catalyst to the aqueous formaldehyde solution with a mass percentage of 37%, adjusting the pH value to 10-12 to obtain a mixed solution.
[0039] Wherein, in parts by mass, the catalyst contains at least one of 0 to 100 parts of water and the following components:
[0040] Sodium hydroxide 0~30 parts;
[0041] Potassium hydroxide 0~10 parts;
[0042] Calcium hydroxide 0~20 parts; and
[0043] Barium hydroxide 0~10 parts.
[0044] Preferably, in terms of mass fraction, the catalyst contains 15 parts of calcium hydroxide, 10 parts of barium hydroxide, 2 parts of potassium hydroxide and 100 parts of water.
[0045] S120. Mix and heat cyclohexanone and bisphenol A to 20-60° C., add the above mixed solution, and stir at 90-100° C. for 2-6 hours to obtain a reaction solution.
[0046] Wherein...
Embodiment 1
[0058] Add 30kg of sodium hydroxide into 70kg of water to make a catalyst and set it aside.
[0059] The catalyst was added to the aqueous formaldehyde solution with a mass content of 37%, and the pH was adjusted to 11 to obtain a mixed solution.
[0060] Add 980kg of cyclohexanone and 222kg of bisphenol A into the reaction kettle, mix and heat to 50°C, add 1400kg of the above mixed solution, and stir at 90°C for 4 hours to obtain a reaction solution.
[0061] Slowly add cold deionized water to the above reaction solution, keep it at 85°C for 1 hour, continue to add hot deionized water, wash with water 6 times to completely remove the catalyst, take the organic phase, and keep it at -0.098MPa, 150°C for 1 hour Hour, evaporate, obtain the slightly yellow transparent solid cyclohexanone-bisphenol A-formaldehyde polycondensation resin of 1443kg. The resin has a softening point of 135°C and has good solubility in ethanol and xylene.
Embodiment 2
[0063] Add 20kg of calcium hydroxide, 10kg of potassium hydroxide and 1kg of barium hydroxide into 70kg of water to form a catalyst for later use.
[0064] The catalyst was added to the aqueous formaldehyde solution with a mass content of 37%, and the pH was adjusted to 10 to obtain a mixed solution.
[0065] Add 980kg of cyclohexanone and 147kg of bisphenol A into the reaction kettle, mix and heat to 55°C, add 1360kg of the above mixed solution, and stir at 95°C for 3 hours to obtain a reaction solution.
[0066] Slowly add cold deionized water to the above reaction solution, keep it at 85°C for 1 hour, continue to add hot deionized water, wash with water 4 times to completely remove the catalyst, take the organic phase, and keep it at -0.098MPa, 150°C for 1 hour Hour, evaporate, obtain the slightly yellow transparent solid cyclohexanone-bisphenol A-formaldehyde polycondensation resin of 1342kg. The resin has a softening point of 128°C and has good solubility in ethanol and ...
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