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US 8,394,885 B2Granted
Composition for building protection applications based on alkylalkoxy-siloxanes having improved water repellency properties
AssigneeEvonik Degussa GmbH
InventorsManuel Friedel, Spomenko Ljesic, Sabine Giessler-Blank
Life of this patent
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Abstract
The present invention relates to a composition for imparting water repellency to porous mineral substrates and for producing a water repellency effect on the surface of the substrate and to a process for the preparation of such a composition, said composition being based on at least one silane oligomer, at least one hydrolysis or condensation catalyst, at least one fluorine-containing polymer, optionally water and/or at least one organic solvent, optionally at least one emulsifier and optionally further auxiliaries.
Claims17
A composition, comprising:
- (a) a silane oligomer, comprising an alkylalkoxysiloxane of idealized formula (I)
- wherein
- n is a number from 1 to 40,
- R independently of one another, is a C1-C18-alkyl group,
- R1 are, independently of one another, a hydrogen atom or an alkyl radical comprising 1 to 6 carbon atoms;
- (b) a hydrolysis or condensation catalyst;
- (c) a fluorine-comprising polymer;
- and
- (e) at least one emulsifier selected from the group consisting of
- an alkyl sulfate comprising a C8-C18-alkyl,
- an alkyl ether sulfate comprising a C8-C18-alkyl in the hydrophobic radical and 1 to 40 ethylene oxide (EO) or propylene oxide (PO) units,
- an alkaryl ether sulfate comprising a C8-C18-alkyl in the hydrophobic radical and 1 to 40 ethylene oxide (EO) or propylene oxide (PO) units,
- an alkyl sulfonate comprising a C8-C18-alkyl,
- an alkaryl sulfonate comprising a C8-C18-alkyl,
- a monoester of sulfosuccinic acid with a monohydric alcohol comprising 5 to 15 carbon atoms,
- a monoester of sulfosuccinic acid with a monohydric alkylphenol comprising 5 to 15 carbon atoms,
- an alkali metal salt of a carboxylic acid comprising 8 to 20 carbon atoms in the alkyl, aryl, alkaryl, or aralkyl radical,
- an ammonium salt of a carboxylic acid comprising 8 to 20 carbon atoms in the alkyl, aryl, alkaryl, or aralkyl radical,
- an alkyl phosphate comprising 8 to 20 carbon atoms in the organic radical,
- an alkaryl phosphate comprising 8 to 20 carbon atoms in the organic radical,
- an alkyl ether phosphate comprising 8 to 20 carbon atoms in the alkyl radical and 1 to 40 EO units,
- an alkaryl ether phosphate comprising 8 to 20 carbon atoms in the alkaryl radical and 1 to 40 EO units,
- an alkylpolyglycol ether comprising 8 to 40 EO units and C8-C20-carbon atoms in the alkyl radicals,
- an alkarylpolyglycol ether comprising 8 to 40 EO units and C8-C20-carbon atoms in the alkyl or aryl radicals,
- an ethylene oxide/propylene oxide (EO/PO) block copolymer comprising 8 to 40 EO or PO units,
- an adduct of an alkylamine comprising a C8-C22-alkyl radical with ethylene oxide or propylene oxide,
- an alkylpolyglycoside comprising a linear or branched saturated or unsaturated C8-C24-alkyl radical and an oligoglycoside radical comprising 1 to 10 hexose or pentose units, and
- a silicon-functional surfactant,
- wherein the catalyst (b) comprises (b1) a salt of at least one selected from the group consisting of an element of the 1st main group of the periodic table of elements, an element of the 2nd main group of the periodic table of elements, an alcoholate, an amino alcohol, a carboxylic acid, and a mineral acid, or (b2) sodium methanolate, sodium ethanolate, 2-aminoethanol, 2-(N,N-dimethyl)aminoethanol, a titanate, or a zirconate, and
- wherein an average molecular weight of the silane oligomer is ≦1200 g/mol.
27 more elements
Dependencies are inferred from the claim text.