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发明授权
CN105695646B 一种环保型皮革用游离甲醛清除剂 有权

  • 专利标题： 一种环保型皮革用游离甲醛清除剂
  • 申请号： CN201610030291.8
    申请日： 2016-01-18
  • 公开(公告)号： CN105695646B
    公开(公告)日： 2018-06-01
  • 发明人: 林炜 , 石佳博 , 王春华 , 胡利媛 , 高燕菲
  • 申请人： 四川大学
  • 申请人地址： 四川省成都市双流县川大路
  • 专利权人： 四川大学
  • 当前专利权人： 四川大学
  • 当前专利权人地址： 四川省成都市双流县川大路
  • 主分类号： C14C15/00
  • IPC分类号： C14C15/00
一种环保型皮革用游离甲醛清除剂
摘要：
本发明公开一种环保型皮革用游离甲醛清除剂，其制备过程是首先将纳米硅酸盐均匀分散在甲苯与无水乙醇的混合溶剂中，所用甲苯与无水乙醇的体积比为(0.5~2.0):1，之后使用摩尔浓度为0.5~5.0 mmol/g的硅烷偶联剂，在80 oC的条件下剧烈搅拌反应9~12 h，得到游离甲醛清除剂。使用前，将浸酸皮加入到转鼓中先进行复浸酸操作，调节浴液至pH 3.0，加入质量为皮重的0.5%~3.0%醛类鞣剂，继续转动4~6 h，调节浴液至pH 4.0~5.0，加入0.5%~3.0%游离甲醛清除剂，再转动2 h，静置过夜，水洗。本发明即采用硅烷偶联剂表面接枝改性纳米硅酸盐的方法制得有机‑纳米硅酸复合物游离甲醛清除剂，使用该游离甲醛清除剂可明显降低醛类鞣剂鞣革成革中的游离甲醛含量，而且其引入可赋予其抗紫外的纳米性能。
摘要（英）：

The invention discloses an environment-friendly free formaldehyde scavenger for leather. A process for preparing the free formaldehyde scavenger comprises the following steps: uniformly dispersing nano-silicate in a mixed solvent of methylbenzene and absolute ethanol at first, wherein the volume ratio of methylbenzene to absolute ethanol is (0.5-2.0):1; and then adding a silane coupling agent of which the molar concentration is 0.5-5.0 mmol/g, and intensely stirring for 9-12 h at 80 DEG C to obtain the free formaldehyde scavenger. A method for using the free formaldehyde scavenger comprises the following steps: before use, adding pickled leather into a rotary drum for re-pickling operation, and adjusting the pH value of the obtained bath liquid I to be 3.0; adding an aldehyde tanning agent of which the mass is 0.5-3.0% of the tare weight, and continuing to rotate the rotary drum for 4-6h; and adjusting the pH value of the obtained bath liquid II to be 4.0-5.0, adding 0.5-3.0% of the free formaldehyde scavenger, rotating the rotary drum again for 2 h, standing over night, and carrying out washing. The free formaldehyde scavenger, serving as an organic nano-silicate compound, is prepared through surface grafting and modification of nano-silicate by adopting the silane coupling agent; the free formaldehyde scavenger can be used for obviously reducing the content of free formaldehyde in a finished leather product tanned by the aldehyde tanning agent; and by instruction of the free formaldehyde scavenger, the finished leather product can be endowed with an anti-ultraviolet nanometer property.

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