Dendriform cationic leather fixing agent and preparation method thereof
A technology of cationic etherification agent and color-fixing agent, which is applied in dyeing, textile and papermaking, fiber treatment, etc. It can solve the problems of leather rough surface, low activity, large usage, etc., to achieve increased fastness, small dosage, The effect of reducing dosage
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Embodiment 1
[0036] (1) Synthesis of dendritic polyamidoamines from generation 0.5 to generation 1.0
[0037] Synthesis of 0.5-generation dendritic polyamidoamine: Mix methyl acrylate and ethylenediamine at a molar ratio of 1:6 in an ice-water bath, add 30% of the total volume of the reaction system to anhydrous methanol as a solvent, and stir the reaction at room temperature After 10 hours, vacuumize at 30°C, and rotate distillation at a vacuum degree of 0.08MPa for 1.5 hours to remove the solvent and excess methyl acrylate to obtain 0.5 generation dendritic polyamide-amine;
[0038]Synthesis of 1.0 generation dendritic polyamidoamine: mix 0.5 generation dendritic polyamidoamine and ethylenediamine in an ice-water bath at a molar ratio of 1:24, add anhydrous methanol with 20% total volume of the reaction system As a solvent, after stirring and reacting at room temperature for 20 h, vacuumize at 80° C., and under a vacuum of 0.02 MPa, add entrainer toluene and anhydrous methanol (m (toluen...
Embodiment 2
[0042] (1) Synthesis of dendritic polyamidoamines from generation 0.5 to generation 1.0
[0043] Synthesis of 0.5-generation dendritic polyamidoamine: Mix ethyl acrylate and ethylenediamine at a molar ratio of 1:4 in an ice-water bath, add absolute ethanol with a total volume of 20% of the reaction system as a solvent, and stir at room temperature After reacting for 8 hours, evacuate at 40°C, and perform rotary distillation at a vacuum of 0.07 MPa for 1 hour to remove the solvent and excess ethyl acrylate to obtain 0.5 generation dendritic polyamide-amine;
[0044] Synthesis of 1.0-generation dendritic polyamidoamine: Mix 0.5-generation dendritic polyamidoamine and ethylenediamine in an ice-water bath at a molar ratio of 1:12, add 10% absolute ethanol to the total volume of the reaction system As a solvent, after stirring and reacting at room temperature for 16 hours, vacuumize at 80°C, and at a vacuum of 0.07 MPa, add an entrainer n-butanol with 2% of the total mass of the re...
Embodiment 3
[0048] (1) Synthesis of 0.5-2.0 generation dendritic polyamide-amine
[0049] Synthesis of 0.5-generation dendritic polyamidoamine: Mix butyl acrylate and ethylenediamine at a molar ratio of 1:7 in an ice-water bath, add anhydrous methanol with a total volume of 15% of the reaction system as a solvent, and stir at room temperature After reacting for 14 hours, evacuate at 50°C, and perform rotary distillation at a vacuum of 0.08 MPa for 1.5 hours to remove the solvent and excess butyl acrylate to obtain a 0.5 generation dendritic polyamide-amine;
[0050] Synthesis of the 1.0th generation dendritic polyamidoamine: mix the 0.5th generation dendritic polyamidoamine and ethylenediamine in an ice-water bath at a molar ratio of 1:16, add 20% of the total volume of the reaction system to anhydrous methanol As a solvent, after stirring and reacting at room temperature for 24 hours, vacuumize at 70°C, and at a vacuum of 0.08 MPa, add an entrainer n-butanol with a total mass of 2.5% of ...
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