Finishing agent composition, finishing agent and its preparation method and application
A technology of composition and three-proof finishing agent, which is applied in the fields of plant fibers, fiber treatment, textiles and papermaking, etc. It can solve the problems that fabrics cannot maintain excellent decontamination performance, waterproof performance and high washability at the same time, and achieve excellent waterproofing Easy decontamination function, increased softness, and high economic efficiency
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[0038]Existing finishing agents cannot have excellent waterproof performance and easy decontamination performance at the same time. Therefore, the first aspect of the present invention provides a blocked isocyanate to balance the contradiction between waterproof performance and decontamination performance in the finishing agent. The synthetic method of this blocked isocyanate comprises: first use hydrophilic modification agent and containing cycloaliphatic diisocyanate or containing aromatic diisocyanate to synthesize isocyanate prepolymer, then use blocking agent to carry out this isocyanate prepolymer Blocking to obtain the blocked isocyanate. In some embodiments of the present invention, the method for synthesizing an isocyanate prepolymer specifically includes: first dissolving the hydrophilic modifier with a solvent to obtain a solution 1 in which the mass fraction of the hydrophilic modifier is 15-25%, and then Under protective gas, according to the ratio of solution 1: ...
Synthetic example 1
[0062] (1) configure polyethylene glycol mass fraction respectively as 20% ethanol solution and methyl ethyl ketoxime mass fraction as 30% ethanol solution;
[0063] (2) Put 22.2g of isophorone diisocyanate into the there-necked bottle, start the agitator, and under the protection of nitrogen, slowly drip into the ethanol solution of 300g of polyethylene glycol through the dropping funnel while stirring. , stir and heat the oil bath to 40-50°C for 40 minutes; then raise the temperature to 70°C for 120 minutes to obtain a prepolymer, and control its free NCO mass fraction to about 8%;
[0064] (3) Put 20g of prepolymer and 20g of ethanol into the there-necked flask, start the agitator, slowly drop 11.6g of methyl ethyl ketoxime solution into it, react for 3 hours, remove the ethanol by distillation under reduced pressure, and obtain blocked isocyanate a.
Synthetic example 2
[0066] (1) configure polyethylene glycol mass fraction respectively as 20% ethanol solution and sodium bisulfite mass fraction as 30% aqueous solution;
[0067] (2) Put 22.2g of isophorone diisocyanate into the there-necked bottle, start the agitator, and under the protection of nitrogen, slowly drip into the ethanol solution of 300g of polyethylene glycol through the dropping funnel while stirring. , stir and heat the oil bath to 40-50°C for 40 minutes; then raise the temperature to 70°C for 120 minutes to obtain a prepolymer, and control its free NCO mass fraction to about 8%;
[0068] (3) Put 20 g of prepolymer and 20 g of ethanol into a three-necked flask, start the stirrer, slowly drop 16 g of sodium bisulfite aqueous solution into it, react for 3 hours, remove ethanol by distillation under reduced pressure, and obtain blocked isocyanate B.
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