Method for treating synthetic textiles with aminoalkyl-containing polydiorganosiloxanes
AssigneeDow Corning Corporation
InventorRobert E. Kalinowski
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Abstract
Synthetic fibers such as polyethylene terephthalate and nylon are treated with certain polydiorganosiloxanes to provide improved properties such as "hand" and water repellency. When the polydiorganosiloxanes contain approximately two silicon-bonded amino radicals of the formula --R'(NHCH.sub.2 CH.sub.2).sub.a NHR", such as --CH.sub.2 CH.sub.2 CH.sub.2 NHCH.sub.2 CH.sub.2 NH.sub.2, they provide a crosslinked siloxane on the surface of the treated fiber, when heated, which does not diminish the fire-retardancy rating of the fibers.
Claims5
A method for treating a fire-retardant synthetic textile without decreasing its fire-retardancy rating, said method comprising applying to the surface of said textile a liquid composition consisting essentially of a triorganosiloxane-endblocked polydiorganosiloxane containing an average of up to 100 dimethylsiloxane units and two nitrogen-containing siloxane units per molecule, said nitrogen-containing siloxane units each bearing one amino radical of the formula --R'(NHCH.sub.2 CH.sub.2).sub.a NHR" wherein a is 0 or 1, R' denotes a lower alkylene radical and R" denotes a hydrogen radical or a lower alkyl radical, all other organic radicals in the polydiorganosiloxane being methyl radicals, and heating the applied triorganosiloxane-endblocked polydiorganosiloxane, thereby providing a fire-retardant synthetic textile having durably affixed to the surface thereof a crosslinked polydiorganosiloxane.
Dependencies are inferred from the claim text.