Carpet dyeing antifoam

In a carpet dyeing process which includes the use of a foam control agent and the step of a cold water rinse after the dyeing is complete, the improvement comprising using as the foam control agent a composition which consists essentially of

• 1. 30 to 90 percent by weight of a siloxane glycol copolymer selected from the group consisting of siloxane glycol copolymers having the general formulae
• a. R.sub.a Si{(OSiMe.sub.2).sub.n (OSiMeG).sub.b OSiMe.sub.2 G}.sub.4.sub.-a,
• b. R.sub.a Si{(OSiMe.sub.2).sub.n (OSiMeG).sub.c OSiMe.sub.3}.sub.4.sub.-a,
• c. GMe.sub.2 Si(OSiMe.sub.2).sub.n (OSiMeG).sub.b OSiMe.sub.2 G, and
• d. Me.sub.3 Si(OSiMe.sub.2).sub.n (OSiMeG).sub.c OSiMe.sub.3
• in which formulae
• R is a hydrocarbon radical free of aliphatic unsaturation and contains from 1 to 10 carbon atoms,
• Me is a methyl radical,
• G is a radical of the structure --D(OR').sub.m A wherein
• D is an alkylene radical containing from 1 to 30 carbon atoms,
• R' is an alkylene radical containing from 2 to 10 carbon atoms,
• m has a value of at least 1, and
• A is a capping group,
• a has a value of 0 or 1,
• n has a value of at least 1,
• b has a value of 0 to 50, and
• c has a value of 1 to 50,
• 2. 5 to 35 percent by weight of a foam control agent which consists essentially of 85 to 96 parts by weight of a liquid triorganosilyl endblocked polydimethylsiloxane having a viscosity of at least 20 centistokes at 25.degree.C., 4 to 12 parts by weight of silica, and 0 to 3 parts by weight of a siloxane resin consisting essentially of SiO.sub.2 units and (CH.sub.3).sub.3 SiO.sub.1/2 units, the ratio of SiO.sub.2 units to the (CH.sub.3).sub.3 SiO.sub.1/2 units being in the range of 1:0.4 to 1:1.2, and
• 3. 5 to 35 percent by weight of a liquid hydroxyl endblocked polydimethylsiloxane having a viscosity of 50 to 200 centistokes at 25.degree.C.

In a process of controlling foam in a carpet dyeing process which includes the addition of a foam control agent to the carpet dye system in which the foaming is to be controlled, the improvement comprising using as the foam control agent a composition consisting essentially of

• 1. 30 to 90 percent by weight of a siloxane glycol copolymer selected from the group consisting of siloxane glycol copolymers having the general formulae
• a. R.sub.a Si{(OSiMe.sub.2).sub.n (OSiMeG).sub.b OSiMe.sub.2 G}.sub.4.sub.-a,
• b. R.sub.a Si{(OSiMe.sub.2).sub.n (OSiMeG).sub.c OSiMe.sub.3}.sub.4.sub.-a,
• c. GMe.sub.2 Si(OSiMe.sub.2).sub.n (OSiMeG.sub.b OSiMe.sub.2 G, and
• d. Me.sub.3 Si(OSiMe.sub.2).sub.n (OSiMeG).sub.c OSiMe.sub.3
• in which formulae
• R is a hydrocarbon radical free of aliphatic unsaturation and contains from 1 to 10 carbon atoms,
• Me is a methyl radical,
• G is a radical of the structure --D(OR').sub.m A wherein
• D is an alkylene radical containing 1 to 30 carbon atoms,
• R' is an alkylene radical containing from 2 to 10 carbon atoms,
• m has a value of at least 1, and
• A is a capping group,
• a has a value of 0 or 1,
• nhas a value of at least 1,
• b has a value of 0 to 50, and
• c has a value of 1 to 50,
• 2. 5 to 35 percent by weight of a foam control agent which consists essentially of 85 to 96 parts by weight of a liquid triorganosilyl endblocked polydimethylsiloxane having a viscosity of at least 20 centistokes at 25.degree.C., 4 to 12 parts by weight of silica, and 0 to 3 parts by weight of a siloxane resin consisting essentially of SiO.sub.2 units and (CH.sub.3).sub.3 SiO.sub.1/2 units, the ratio of SiO.sub.2 units to the (CH.sub.3).sub.3 SiO.sub.1/2 units being in the range of 1:0.4 to 1:1.2, and
• 3. 5 to 35 percent by weight of a liquid hydroxyl endblocked polydimethylsiloxane having a viscosity of 50 to 200 centistokes at 25.degree.C.