Preparation method and application of polyester block PAE low-organochlorine wet strength agent
A technology of PAE wet strength agent and polyester block, applied in the direction of reinforcing agent addition, flexible covering, wrapping paper, etc., can solve the problems of wet strength agent gel, residue, limited application, etc., and achieve the reduction of organic chlorine residue , Increased molecular weight, improved hydrophobicity
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Embodiment 1
[0021] (1) Add 1.8mol of adipic acid, 0.2mol of maleic anhydride, 1.6mol of diethylenetriamine, and 0.04mol of p-toluenesulfonate into a 1000ml four-neck flask equipped with a stirrer, thermometer and fractionating device acid, the temperature was raised to 150°C, and the heat preservation reaction was carried out for 2.5 hours to obtain a polyamide polyamine prepolymer (P1) containing a carbon-carbon double bond;
[0022] (2) Add 0.37 mol of propylene glycol and 0.03 mol of glycerin to the polyamide polyamine prepolymer (P1) containing carbon-carbon double bonds, stepwise increase the temperature to 190°C-210°C, and keep the temperature for 5 hours, After the reaction was completed, the temperature was lowered to 140° C., and 610 g of deionized water was gradually added to adjust the solid content to 40%, so as to obtain 1015 g of a polyester block PAE wet strength agent intermediate dispersion (P2) containing a carbon-carbon double bond;
[0023] (3) Weighing 250 grams of th...
Embodiment 2
[0026] (1) Add 1.7 mol of adipic acid, 0.3 mol of fumaric anhydride, 1.45 mol of diethylenetriamine, and 0.05 mol of triethylene tetramine into a 1000ml four-neck flask equipped with a stirrer, a thermometer and a fractionating device. Amine, 0.03mol of 98% sulfuric acid, heated up to 160°C, kept warm for 1.5 hours to obtain a polyamide polyamine prepolymer (P1) containing a carbon-carbon double bond;
[0027] (2) Add 0.48 mol of propylene glycol and 0.02 mol of pentaerythritol into the polyamide polyamine prepolymer (P1) containing carbon-carbon double bonds, raise the temperature stepwise to 195 ° C ~ 210 ° C, and keep it warm for 3.5 hours. At the end, lower the temperature to 140°C, gradually add 490g of deionized water, adjust to a solid content of 45%, and obtain 892g of a polyester block PAE wet strength agent intermediate dispersion (P2) containing a carbon-carbon double bond;
[0028] (3) Take by weighing 250 grams of the above-mentioned solid content and be that the ...
Embodiment 3
[0031] (1) Add successively the adipic acid of 1.5mol, the terephthalic acid of 0.4mol, the glutaconic acid of 0.1mol, the diethylenetriamine of 1.7mol in the 1000ml four-necked flask that has stirrer, thermometer and fractionating device, 0.05mol of p-toluenesulfonic acid, heated up to 160 ° C, and kept for 1.5 hours to obtain a polyamide polyamine prepolymer (P1) containing a carbon-carbon double bond;
[0032] (2) Add 0.15 mol of ethylene glycol, 0.13 mol of butanediol, and 0.02 mol of sorbitol to the polyamide polyamine prepolymer (P1) containing carbon-carbon double bonds, and raise the temperature to 190 ° C ~ 210°C, keep warm for 4 hours, after the reaction is over, lower the temperature to 140°C, gradually add 640g of deionized water, adjust the solid content to 40%, and obtain the intermediate dispersion of polyester block PAE wet strength agent containing carbon-carbon double bonds Liquid (P2) 1065g;
[0033] (3) Weighing 280 grams of the wet strength agent intermed...
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