Methods for preventing the penetration of toxic chemicals through the stratum corneum of the skin of a mammal are disclosed which employ, as a penetration prevention agent, at least one compound selected from the group consisting of compounds represented by the formula: ##STR1## wherein W.sub.1 is a divalent oxygen, sulfur or nitrogen radical, W.sub.2 and W.sub.3 are independently a divalent oxygen or sulfur radical, R' is an alkyl radical comprising from 1 to 4 carbon atoms, y is 0 or 1, R.sub.1 and R.sub.2 are alkyl radicals comprising from 1 to 10 carbon atoms and R and R.sub.3 are individually a hydrocarbyl radical containing from 1 to 20 carbon atoms or a heteroatom-substituted derivative thereof wherein at least one but not two adjacent carbon atoms may be replaced by a divalent oxygen or sulfur radical or by NR", wherein R" is hydrogen or R', n is an integer from 2 to 5 and compounds represented by the above formula in which the ring and/or R includes one to three carbon carbon double bonds.
本发明揭示了一种防止有毒
化学物质通过哺乳动物皮肤角质层渗透的方法,该方法采用至少一种从以下化合物组成的群体中选择的化合物作为渗透预防剂:其中W.sub.1是二价氧、
硫或氮基团,W.sub.2和W.sub.3分别是二价氧或
硫基团,R'是包含1至4个碳原子的烷基基团,y为0或1,R.sub.1和R.sub.2是包含1至10个碳原子的烷基基团,R和R.sub.3分别是含有1至20个碳原子的烃基基团或其杂原子取代衍
生物,其中至少有一个但不是两个相邻碳原子可以被二价氧或
硫基团或NR"取代,其中R"是氢或R',n是2至5的整数,以及上述公式中环和/或R包括一到三个碳碳双键的化合物。