Branched aqueous carbodiimide type crosslinking agent and preparation method thereof
A carbodiimide type and cross-linking agent technology, applied in the direction of organic chemistry, can solve the problems of weakened cross-linking activity, cross-linking activity and water solubility/dispersibility at the same time, and achieve simple preparation process and excellent water solubility Sexuality/dispersibility, low color change index effect
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Embodiment 1
[0024] Preparation of branched waterborne carbodiimide crosslinking agent
[0025] 61.5g triphenylmethane triisocyanate, 263.7g dicyclohexylmethane diisocyanate, 3.25g 1-phenyl-2-cyclobutene 1-oxide and 3.25g phosphite were mixed with β-(3,5- The mixture of di-tert-butyl-4-hydroxyphenyl) octadecyl propionate is added to the reactor together, in which, the phosphite and β-(3,5-di-tert-butyl-4-hydroxyphenyl) Octadecyl propionate is mixed at a molar ratio of 1:2.3, and then press 25cm 3 The flow rate of / min was passed into hydrogen protection, stirred and reacted at 160°C for 5h, and then the temperature in the reactor was lowered to 100°C, and 3.25g of trifluoroalkanoic acid trimethylsilicate was added, and the stirred reaction was continued for 1h before adding 109.6g of sodium 3-allyloxy-2-hydroxyl-1-propanesulfonate, and continue to stir for another 2h; finally lower the temperature in the reactor to below 35°C, add 600.5g of distilled water to dilute to a solid content of ...
Embodiment 2
[0027] Preparation of branched waterborne carbodiimide crosslinking agent
[0028] 27.3 g of pentaerythritol, 269.8 g of trimethyl-1,6-hexamethylene diisocyanate, 2.97 g of 3-methyl-2-cyclobutene 1-oxide and 2.97 g of phosphite were mixed with 1,3, A mixture of 5-trimethyl-2,4,6-(3,5-di-tert-butyl-4-hydroxybenzyl)benzene is added to the reactor together, in which phosphite and 1,3,5- Trimethyl-2,4,6-(3,5-di-tert-butyl-4-hydroxybenzyl)benzene is mixed at a molar ratio of 1:2.3, and then press 28cm 3 The flow rate of / min was passed into hydrogen protection, and the reaction was stirred at 138°C for 8h, and then the temperature in the reactor was lowered to 90°C, and 2.97g of trimethylsilyl methanesulfonate was added, and the stirring reaction was continued for 0.5h before adding 130g of sodium 3-hydroxy-1-propanesulfonate, and continue to stir for 2.5 hours; finally, the temperature in the reactor is lowered to below 35°C, and 601g of distilled water is added to dilute to a so...
Embodiment 3
[0030] Preparation of branched waterborne carbodiimide crosslinking agent
[0031] 23.5g of tetraethylenepentamine, 310.6g of diphenylmethane diisocyanate, 3.34g of 3-methyl-2-cyclobutene 1-oxide and 3.34g of phosphite were mixed with β-(3,5-ditertiary The mixture of butyl-4-hydroxyphenyl)propionate isooctanol is added to the reactor together, wherein, phosphite and β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate are Octanol esters are mixed at a molar ratio of 1:2.3, and then press 30cm 3 The flow rate of / min was passed into hydrogen protection, and the reaction was stirred at 120°C for 5.5h, and then the temperature in the reactor was lowered to 90°C, and 3.34g of diethyl trimethylsilicon phosphate was added, and the stirring reaction was continued for 0.5h before Add 83.23g of sodium hydroxymethanesulfonate, and continue to stir and react for 2 hours; finally, reduce the temperature in the reactor to below 35°C, add 600.1g of distilled water to dilute to a solid content o...
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