Patent ID: 8524648

Claim:
A method of preventing the transfer of a textile dye from a dyed textile to an undyed textile or from a first dyed textile to a second dyed textile having a different color than the first dyed textile when washed together in an aqueous solution comprising a surfactant, said method comprising providing the aqueous solution with at least one polycarbonate-polyorganosiloxane compound containing at least one structural element of Formula (I): —Y-A-(C═O)-A- (I) where each A is O, Y is a divalent or polyvalent, linear, cyclic or branched, saturated, unsaturated or aromatic, substituted or unsubstituted hydrocarbon radical with up to 1000 carbon atoms, where the carbon atoms of a polyorganosiloxane unit that is optionally also contained are not counted, which may contain one or more groups selected from —O—, —(CO)—, —NH—, —NR 2 —, —(N + R 2 R 3 )— or a polyorganosiloxane unit with 2 to 1000 silicon atoms, R 1 is hydrogen or a linear, cyclic or branched, saturated, unsaturated or aromatic hydrocarbon radical with up to 40 carbon atoms, which may contain one or more groups selected from —O—, —(CO)—, —NH— or —NR 2 —, R 2 is a linear, cyclic or branched, saturated, unsaturated or aromatic hydrocarbon radical with up to 40 carbon atoms, which may contain one or more groups selected from —O—, —(CO)— or —NH—, R 3 is a linear, cyclic or branched, saturated, unsaturated or aromatic hydrocarbon radical with up to 100 carbon atoms, which may contain one or more groups selected from —O—, —(CO)— or —NH— or is a divalent radical which forms a cyclic structure within the radical Y, or one or both radicals A vicinal to Y together with the radical Y between them may form a heterocyclic radical containing nitrogen, and in the entire compound, not all the radicals Y and/or R 1 and/or R 2 and/or R 3 indicated in Formula (I) must be the same, with the provision that at least one of the radicals Y in the entire compound is a polyorganosiloxane unit with 2 to 1000 silicon atoms or an acid addition compound and/or salt thereof.