Waterproof PU leather and preparation method thereof
A leather and hydrophobic agent technology, applied in the field of artificial leather, can solve the problems of poor waterproof effect of PU leather, achieve uniform waterproof effect, ensure waterproof performance, and reduce the possibility of effect
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[0043] Preparation Example 1
[0044] Take 1kg methyltriethoxysilane solution 1 as a modifier.
Example Embodiment
[0045] Preparation Example 2-7
[0046] Methyl triethoxysilane were taken, pentaerythritol stearate, silane coupling agents, dimethylolpropionic acid, particularly mass in Table 1, stirred and mixed to prepare a modified liquid 2-7.
[0047] 2-7 modifying component solution was prepared Table 1 Example
[0048]
[0049] Preparation Example hydrophobic agent
Example Embodiment
[0050] Preparation Example 8-10
[0051] Ethanol were weighed, deionized water, and a modified nanosilica was 1, Table 2 the specific mass, the first nano-silica, ethanol, nano silica mixed by stirring continuously at 20kHz at 30s , standing 30s, three cycles, to obtain an intermediate solution, again modified intermediate solution was added 1, continued stirring, to obtain an intermediate product, ethanol was centrifuged and washed intermediates supernatant was decanted, the precipitate retained lower , and the pellet was placed in an oven and dried to obtain modified nanosilica treated 1-3, 1-3 as a water repellent.
[0052] Each component prepared in Examples 8-10 Comparative Example 2
[0053]
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