| 摘要 |
To the surface of the substrates is applied a polysiloxane which has triorganosiloxane end groups and which on average contains at least two nitrogen-containing siloxane units carrying a radical of the formula -R'(NHCH2CH2)aNHR'' where a is 0 or 1, R' is a bivalent hydrocarbon radical that is alkyl, cycloalkyl, aryl or aralkyl, and R'' is hydrogen or a univalent hydrocarbon radical that is alkyl, cycloalkyl, aryl or aralkyl. The amine functionality of the polydiorganosiloxane expressed as weight percentages of NH or NH2 groups, based on the total weight, must be less than 4 % and the remaining organic radicals of the polydiorganosiloxane must be univalent, optionally fluorinated alkyl or aryl hydrocarbon radicals. The polysiloxane is applied in the form of a liquid and cured by heating, advantageously without a curing agent. It improves the properties of these substrates, in particular the handle, without adversely affecting the flammability characteristics to any significant extent. |
