Mixtures of polysiloxane emulsions
AssigneeCiba Specialty Chemicals Corporation
InventorsHarald Chrobaczek, Michael Geubtner, Ralf Goretzki, Günther Tschida
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Abstract
Internal softness and surface smoothness are obtainable for textiles on treating them with a composition containing amino-functional polyorganosiloxanes. The composition may be prepared by simply mixing two separately prepared polysiloxane emulsions. Each emulsion contains an amino-functional polyorganosiloxane having a certain minimum content of nitrogen. One of the two separately prepared emulsions is a macroemulsion, the other a microemulsion.
Claims13
A composition obtained by combining a first aqueous dispersion A), which contains an amino-functional polyorganosiloxane, with a second aqueous dispersion B), which contains an amino-functional polyorganosiloxane, said polyorganoslioxane in said dispersion A) having a nitrogen content of 0.1% to 1.5% by weight and said polyorganosiloxane in said dispersion B) having a nitrogen content of 0.01% to 1.3% by weight, wherein said amino-functional polyorganosiloxane in said dispersion A) has a nitrogen content at least 10% higher than said polyorganosiloxane in said dispersion B), and wherein said dispersion A) and said dispersion B) are combined in such amount ratios that the composition obtained contains 0.3 to 3 parts by weight of polyorganosiloxane from said dispersion B) per part by weight of polyorganosiloxane from said dispersion A), said dispersion A) being a microemulsion and said dispersion B) being a macroemulsion.
A composition as claimed in claim 9 wherein all X radicals present are selected from radicals of the general formulae (II) to (VII)
- where the nitrogenous radicals of these formulae may also be quaternized with an alkyl group of 1 to 8 carbon atoms at one or more of the nitrogen atoms,
- R is as defined in claim 12,
- R′″ is H or CH3,
- k is from 0 to 6,
- t is from 2 to 8,
- I is from 0 to 3,
- R4 is H, —CO[Parenopenst]CH2[Parenclosest]kOH, —CH2[Parenopenst]CH2[Parenclosest]kCH3or cyclohexyl,
- A is hydrogen or an alkyl group of 1 to 4 carbon atoms, Q and Q′ are each a divalent branched or unbranched alkylene radical of 1 to 4 carbon atoms, p is =0 or 1, and all the Z radicals present are independently hydrogen, an alkyl radical of 1 to 6 carbon atoms with or without one or more hydroxyl groups as substituents, cyclohexyl or the —CO—G radical, where G is an aliphatic radical of 1 to 6 carbon atoms with or without one or more hydroxyl groups as substituents.
Dependencies are inferred from the claim text.