Preparation method of pearlescent anti-crease waterproof moisture-permeable polyurethane synthetic leather

[0021] A pearlescent crease-resistant waterproof and moisture-permeable polyurethane synthetic leather, comprising a base cloth layer, an intermediate layer and a surface layer, characterized in that: the surface layer is made of the following raw materials in parts by weight:

[0022] Thermoplastic polyurethane elastomer 60-80, ethylene glycol phenyl ether 2-4, sodium dodecylsulfonate 2-4, polyacrylate 3-8, sulfurized castor oil 0.5-1, activated carbon 2-3, nitrocellulose 1 -2, polyurethane 1-2, ammonium polyacrylate 0.2-0.5, sodium polyphosphate 0.5-1, penetrant JFC2-5, dry colorant 2-4, modification additive 2-6; ethyl acetate Ester 10-16, butyl acetate 15-20, pearl powder 2-12, colored plastic particles 1-5;

[0023] Described intermediate layer is made from the raw material of following weight part:

[0024] Polycarbonate polyurethane resin 60-80, expanded graphite 2-4, quartz sand 1-2, dodecylbenzenesulfonic acid 2-6, fatty acid polyoxyethylene ester 1-2, magnesium oxide 5

[0030] Prepare the preparation method of a kind of high-elastic fireproof polyurethane synthetic leather described in the above implementation one, comprising the following steps:

[0031] (1) Weigh the surface layer raw materials according to the ratio of Example 1, mix activated carbon, nitrocellulose, dry pigment, pearl powder and colored plastic particles, grind to 100-200 mesh, add an appropriate amount of 2-6% acetic acid Treat the solution at 40-50°C for 6-8h, add polyurethane, adjust the pH to neutral, freeze-dry and grind to 500-600 mesh, add the rest of the raw materials at 600-800r / min, stir at 40-60°C for 30- After 60 minutes, the surface layer slurry is obtained; the surface layer slurry is evenly coated on the release paper, and the surface layer is formed after drying at 100-120°C;

[0032] (2) Weigh the raw materials of the middle layer according to the proportion of Example 1, mix expanded graphite, quartz sand, magnesium oxide and aluminum hydroxide, then calc