Abstract: The invention relates to stabilized dispersions of precipitated silicon dioxide, to a process for production thereof and to the use thereof, especially for production of paper coatings for glossy photo paper for inkjet printing.

Abstract: The present invention relates to a preparation comprising at least one specific oligomeric siloxane component and at least one polymer component, to processes for producing it and to its use in formulations, more particularly metal coating formulations.

Abstract: The present invention relates to the use of oligomeric siloxane components in radiation-curable formulations which in the cured state offer a particular degree of corrosion control for metallic substrates.

Abstract: Stable low chloride solutions of hydrosalts of an organic acid with a N-substituted aminopolysiloxane in the form of a T structural unit contain at least one lower alcohol, and at least one stabilizer. Methods to prepare the stable low-chloride solutions are also provided.

Abstract: High-viscosity aqueous emulsions of functional alkoxysilanes, condensed oligomers thereof, organopolysiloxanes, their preparation and use for the surface treatment of inorganic materials High-viscosity aqueous oil-in-water emulsion which comprises from 50 to 90% by weight, based on the total weight of the emulsion, of functional alkoxysilanes and/or condensed oligomers thereof and/or organoalkoxysiloxanes, at least one emulsifier and water and has a pH of from 5 to 9 and a mean droplet size of the disperse phase of less than 5 ?m, wherein the width of the droplet size distribution, expressed as the span (see formula (I)), is >1.5, preferably from 3 to 8. The preparation of the emulsions having the desired droplet size distribution is carried out in apparatuses having at least one pressure stage at a pressure of from 2 to 15 MPa. The emulsion can be used for hydrophobicizing porous mineral building materials.

Abstract: The invention relates to a composition for coating metal surfaces, containing water-soluble, substantially fully hydrolyzed polysiloxanes with amino-functional groups and vicinal dihydroxyalkyl-functional and/or epoxy-functional groups, a method for the production thereof, the use of said composition for coating metal surfaces, and parts, especially calipers, which are treated with said composition.

Abstract: The present invention relates to a process for performing a controlled hydrolysis and condensation of an epoxy-functional silane of the general formula I R1-SiR?m(OR)3-m (I) in which R1 is a (III) or (IV) group and R, R? and R? groups are the same or different and are each hydrogen (H) or a linear, branched or cyclic, optionally substituted alkyl group having from 1 to 6 carbon atoms, A and A? groups are the same or different and are each a bivalent alkyl group having from 1 to 10 carbon atoms, R2 groups are the same or different and R2 is a linear, branched or cyclic, optionally substituted alkyl group having from 1 to 20 carbon atoms, and m is 0 or 1, and optionally of at least one further organofunctional silane of the general formula II R2-SiR?n(OR)3-n (II) in which R2 is an organofunctional group as already defined above, R? is methyl, R groups are each independently hydrogen or a linear, branched or cyclic alkyl group having from 1 to 6 carbon atoms and n is 0 or 1, where from 0.

Abstract: The present invention provides a new corrosion control coating for metals, a process for preparing it, and its use.

Abstract: The present invention relates to the use of a mixture that is dispersible, redispersible, or soluble in water, or an aqueous composition for protecting substrates from corrosion, wherein the mixture, or the composition, is based on at least one organic polymer that is soluble in water and at least one organosilicon compound. The invention further relates to a mixture that is dispersible, redispersible, or soluble in water, based on at least one organic polymer that is soluble in water and at least one organosilicon compound having at least one Si—O—Si bond and/or at least one Si—Si bond, wherein either the content of the organic polymer soluble in water, based on the sum of the organic polymer soluble in water and of the organosilicon compound, is between about 40 and about 80 wt.-%, or the organosilicon compound is an oligomer mixture of alkyl alkoxy siloxanes, wherein the oligomer mixture contains 50 to 100 wt.-% of alkyl alkoxy siloxanes, and the same have a degree of oligomerization of 2 to 20.

Abstract: The present invention relates to a composition acting as coupling agent between fillers and peroxidically crosslinking elastomers in rubber compounds, which comprises, as component comprising silicon compounds, a mixture a) of vinylalkoxysiloxanes with alkylalkoxy-siloxanes, or b) of vinylalkoxysiloxanes with phenylalkoxy-siloxanes, or c) of vinylalkoxysiloxanes with phenyl/alkyl-alkoxysiloxanes or d) of acrylic or methacrylic alkoxysiloxanes with alkylalkoxysiloxanes, or e) of acrylic or methacrylic alkoxysiloxanes with phenylalkoxysiloxanes, or f) of acrylic or methacrylic alkoxysiloxanes with phenyl/alkylalkoxysiloxanes, or g) of at least one co-oligomeric organosiloxane which, as organofunctional groups, bears at least one group from the series vinyl, acrylic and methacrylic, and at least one group from the series alkyl and phenyl, and at least one alkoxy or hydroxy group.

Abstract: A process is provided for impregnating porous mineral substrates by a spray technique in which use is made of a gas-supported spraying assembly to apply liquid impregnating agent in a controlled manner to the substrate surface, the amount consumed being markedly less than the amount consumed in a conventional method of application by a flow-coating process.

Abstract: The present invention relates to a composition comprising an organofunctional silane system, in which fluorinated alkyl groups of the general formula F3C(CF2)r(CH2)s— (Ib) are attached to some of the silicon atoms, and a thickener, to a process for preparing such a composition, and to the use of the composition for preventing surface soiling.

Abstract: The present invention provides a linear, cyclic or branched polyether-functional siloxane or a mixture of polyether-functional siloxanes of the general formula (I) R[—O(3-h)/2Si(R1)(OR)h]x[—O(3-i-j)/2Si(R2)(R3)i(OR)j]y, (II) in which groups R are identical or different and R is essentially H, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, t-butyl, 2-methoxyethyl or 2-hydroxyethyl or, in the case of cyclic siloxanes, may be a silyl radical of the silyl units of the formula (I), groups R1 are identical or different and R1 is a terminally blocked polyether group of the formula (II), R4—O[—R5—O]n[(—R6)m]— (II) and groups R2 are identical or different and R2 is a linear, branched or cyclic, optionally substituted alkyl group having 1 to 18 carbon atoms or a mercaptoalkyl group or an alkenyl group having 2 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms or an aryl group having 6 to 12 carbon atoms or an aminoalkyl group or the general formula (III) H2N(CH2)d[(NH)e(CH2)f]g—(CH2)3— (III) The

Abstract: The present invention provides a sol-gel composition which is dilutable with water in any proportion and is based on the reaction of at least the following components: (i) a glycidyloxypropylalkoxysilane, (ii) an aqueous silica sol having a solids content of >1% by weight, (iii) an organic acid as hydrolysis catalyst, and (iv) n-propyl zirconate, butyl titanate or titanium acetylacetonate as crosslinker, starting from a mass ratio of the solids mass of component (ii) to component (i) 0.75, a process for preparing it and its use, in particular as a sol-gel composition for corrosion control coatings, a corresponding corrosion control coat or primer coat, and articles equipped with such a coating.

Abstract: The present invention relates to composite materials composed of lignocellulosic fibers, for example wood meal, and thermoplastic polymer. The inventive composite material has improved mechanical properties. According to the invention, it is envisaged that the lignocellulosic fibers, before mixing with the thermoplastic polymer, are treated with an aqueous mixture composed of organopolysiloxanes which contain aminoalkylalkoxysilanes.

Abstract: The present invention relates to a composition which comprises (i) at least one block condensate of organofunctional siloxanes of the general formula (I) [F]e[QcPb]d (I) and/or (ii) at least one mixture composed of e[F] and d(c[Q]+b[P]) and, where appropriate d[QcPb]. These compositions or block condensates are obtainable via reaction of block units F with block units Q, P, and/or QP, by one of the following methods:—c1) diluting block unit F optionally with an alcohol, adding an organic or inorganic acid and from 0.5 to 150 mol of water per mole of Si of the siloxane used, whereupon at least partial hydrolysis of the block units used takes place, then adding block unit Q and block unit P, and allowing the mixture to react, or—c2) diluting block unit F optionally with an alcohol, mixing with Q, P, and/or block unit QP, then adding an organic or inorganic acid and, using from 0.

Abstract: The present invention relates to composite materials based on (a) at least one cellulose- or lignocellulose-containing material and (b) at least one aminoalkylsilane of the formula (I) R1R2N(CHR4)aSi(R3)r(OR)3-r (I), in which groups R1 and R2 are identical or different and in each case are H or a linear, branched or cyclic C1- to C20-alkyl group or an aryl group or an aminocarbyl group, it being possible for groups R1 and R2 to be optionally substituted, groups R4 are identical or different and R is H or methyl, a is from 1 to 10, R3 is H or a linear or branched C1- to C8-alkyl group, groups R are identical or different and R is H or a linear or branched C1- to C8-alkyl group and r is 0 or 1 or 2, or at least one cocondensate of at least one aminoalkylsilane of the general formula (I) and at least one further functional silane of the general formula (II) R7(CHR6)bSi(R5)p(OR)3-p (II), in which R7 is H or a vinyl group or an amino group or a glycidyloxy group or an acryloyloxy group or a methacryloyloxy group o

Abstract: The present invention relates to a composite material based on (a) a cellulose- or lignocellulose-containing material and (b) a composite as a binder, the composite resulting from the reaction of at least the components (i) a glycidyloxypropylalkoxysilane, (ii) an aqueous silica sol having a solids content of >20% by weight, (iii) an organic acid as a hydrolysis catalyst and (iv) n-propyl zirconate, butyl titanate or titanium acetylacetonate as a crosslinking agent. The present invention furthermore relates to a process for the production of said composite materials and the use of a composite (b) as a binder for the production of wood-based materials.

Abstract: The present invention provides a process for preparing a metal-free alkaline earth methanolate by alcoholysis of an alkaline earth ethanolate with methanol.

Abstract: The present invention relates to a binder for composite materials comprising cellulose- or lignocellulose-containing materials, which is based on the components (i) at least one binder from the series consisting of organic resins, isocyanates, natural or near-natural binders and (ii) at least one composition based on an aminoalkylsilane. The invention furthermore relates to a composite material which is at least based on a cellulose- or lignocellulose-containing material and the abovementioned binder, a process for the production of such a composite material and the use of the binder system according to the invention for the production of wood-based materials.