Method for modifying superfine fiber synthetic leather based on amino-terminated hyperbranched polymer
A technology of amino-terminated hyperbranched and ultra-fine fibers, which is applied in fiber treatment, textiles and papermaking, etc., can solve the problems of immaturity and organic solvent pollution of synthetic leather, and increase the binding amount and dyeing performance. stable effect
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Embodiment 1
[0021] Step 1: Synthesis of amino-terminated hyperbranched polymers, the specific steps are as follows:
[0022] Add N,N-methylenebisacrylamide (MBA) and diethylenetriamine (DETA) at a weight ratio of 1:1.5 to water that is 8 times the weight of N,N-methylenebisacrylamide at 70°C Then, transfer it to a rotary evaporator, remove excess water at 70°C for about 1h, wash with 200mL acetone, remove unreacted monomers, and dry in a blast oven at 70°C for 6h. Obtain the finished product of yellow-brown liquid amino-terminated hyperbranched polymer;
[0023] Step 2: Introduce the amino-terminated hyperbranched polymer into the base fabric with a cross-linking agent capable of cross-linking with amino and carboxyl groups at the same time, so as to increase the content of hydrophilic amino groups. The specific steps are as follows:
[0024] First, the base cloth is hydrolyzed with formic acid, and then the organic phosphine tanning agent of 1% to 10% of the base cloth mass is added to ...
Embodiment 2
[0030] Step 1: Synthesis of amino-terminated hyperbranched polymers, the specific steps are as follows:
[0031] Add N,N-methylenebisacrylamide (MBA) and diethylenetriamine (DETA) at a weight ratio of 1:1 to water six times the weight of N,N-methylenebisacrylamide at 80°C Then, transfer it to a rotary evaporator, remove excess water at 80°C for about 40min, wash with 200mL of acetone, remove unreacted monomers, and dry it in a blast drying oven at 80°C for 4h. Obtain the finished product of yellow-brown liquid amino-terminated hyperbranched polymer;
[0032] Step 2: Introduce the amino-terminated hyperbranched polymer into the base fabric with a cross-linking agent capable of cross-linking with amino and carboxyl groups at the same time, so as to increase the content of hydrophilic amino groups. The specific steps are as follows:
[0033] Now the base cloth is hydrolyzed with formic acid, and then the modified glutaraldehyde tanning agent with 4% of the weight of the base clo...
Embodiment 3
[0039] A kind of method based on amino-terminated hyperbranched polymer to superfine fiber synthetic leather modification, comprises the steps:
[0040] Step 1: Synthesis of amino-terminated hyperbranched polymers, the specific steps are as follows:
[0041] Add N,N-methylenebisacrylamide (MBA) and diethylenetriamine (DETA) at a weight ratio of 1:0.9 to water that is 4 times the weight of N,N-methylenebisacrylamide, at 60°C Then, transfer it to a rotary evaporator, remove excess water at 60°C for about 1h, wash with 200mL acetone, remove unreacted monomers, and dry in a blast oven at 60°C for 4h. Obtain the finished product of yellow-brown liquid amino-terminated hyperbranched polymer;
[0042] Step 2: Introduce the amino-terminated hyperbranched polymer into the base fabric with a cross-linking agent capable of cross-linking with amino and carboxyl groups at the same time, so as to increase the content of hydrophilic amino groups. The specific steps are as follows:
[0043]...
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