Abstract: A cement-containing composition includes a proportion of 0.05% by weight to 1% by weight, based on the cement content, of an organosilicon compound(S). The organosilicon compound contains at least 70% by weight of units of the formula (1), R1R2 (OR3)xSiO(2-x)/2 (1). In formula 1, R1 is a methyl group, R2, in all units of the formula (1), may be identical or different and is a monovalent, SiC-bonded, aliphatic hydrocarbon radical having 4 to 22 carbon atoms, R3, in all units of the formula (1), may be identical or different and is a hydrogen atom or an alkyl radical having 1 to 4 carbon atoms, and x is 0 or 1.

Abstract: The invention relates to spherical, nonporous Silicon particles having average particle sizes (d50) of 1 to 10 pm and a silicon content of 97 to 99.8 wt. %, the silicon content relating to the total weight of the silicon particles minus any oxygen content.

Abstract: A process for producing alkyl silicone resins (A) containing at least 80 wt % of units of the general formula (I), R1a(R2O)b(HO)dR3cSiO(4-a-b-c-d)/2 (I), is provided. Alkylalkoxysilane (A1) of the general formula (II), R1aR3cSi(OR2)(4-a-c) (II), is mixed in a first reaction step (R1), alternatively, with a pure acid (S) having pKa of not more than 5, with an at least 5 wt % aqueous solution of an acid (S) having a pKa of not more than 5 or with a halosilane compound (A2) of the general formula (III), R1aR3cSi(X)(4-a-c) (III). Subsequently, in at least one further reaction step, (R2) water is added.

Abstract: The invention relates to methods for producing non-aggregated, modified silicon particles by treating non-aggregated silicon particles which have volume-weighted particle size distributions with diameter percentiles d50 of 1.0 ?m to 10.0 ?m at 80° C. to 900° C. with an oxygen-containing gas.

Abstract: Silicon particles with a reduced and/or delayed propensity to generate hydrogen gas by reaction with water in aqueous inks for preparing lithium ion battery anodes are prepared by milling silicon, preferably in an oxidative atmosphere, followed by heat treating at an elevated temperature in vacuum or an inert atmosphere.

Abstract: Hydrophobic mineral insulation materials and method of making the same are disclosed. The mineral insulants may include at least one amino-functional organosilicon compound. The amino-functional organosilicon compounds may have an amine number in the range of 0.05 to 0.40. The method of hydrophobicizing may include providing an aqueous emulsion having at least one amino-functional organosilicon compound which may have an amine in the range of 0.05 to 0.40.

Abstract: The invention relates to a method for producing hydrophilic silicia moulded bodies, in which i) a mixture containing hydrophilic silicic acid is added at a maximum temperature of 55° C. to hydrophobic means and ii) the mixture obtained in step i) is compacted after a maximum storage time of 30 days to form moulded bodies, iii) during steps ii and iii and until the moulded bodies are used, the temperature is at a maximum of 55° C.

Abstract: A lithium ion battery and process for producing the same. The lithium ion batteries include a cathode, an anode, a separator, an electrolyte and a battery housing which receives these components. The cathode, the anode, the separator or any other reservoir located in the battery housing and differing from the electrolyte contains one or more organic or inorganic nitrates or one or more organic or inorganic nitrites and the anode contains silicon particles with a silicon content of ?90 wt. % in relation to the total weight of the silicon particles.

Abstract: Granular and/or shaped hydrophobic silica useful for thermal insulation materials are prepared by mixing hydrophilic silica with a hydrophobicizing agent at low temperature so the hydrophobicizing agent does not appreciably react, followed by deaeration and compaction.

Abstract: Silicon particles with a reduced and/or delayed propensity to generate hydrogen gas by reaction with water in aqueous inks for preparing lithium ion battery anodes are prepared by milling silicon, preferably in an oxidative atmosphere, followed by heat treating at an elevated temperature in vacuum or an inert atmosphere.

Abstract: The invention relates to polymer-grafted silicon particles, wherein the silicon particles have an average particle size (d50) of 700 nm to 10 ?m and the polymers of the polymer-grafted silicon particles are attached to the silicon particles in a wash-stable manner in an aqueous medium.

Abstract: 4-(dialkylchlorosilyl)butyronitriles are prepared by high yield by reacting a mixture of technical grade allyl cyanide with dialkylchlorosilanes in the presence of a catalyst of transition group 8 of the Periodic Table of the Elements, wherein the reaction is conducted such that a stoichiometric excess of the dialkylchlorosilane is present together with the catalyst in the reaction mixture, into which the allyl cyanide is metered.

Abstract: Hydrophobic shaped silica bodies having low density and low thermal conductivity are produced by forming a dispersion of silica in a solution of binder and organic solvent, and removing the solvent and shaping to form a shaped body. The shaped bodies retain their hydrophobicity, are stable with regards to shape, and are useful in acoustic and thermal insulation.

Abstract: Hydrophobic shaped silica bodies having low density and low thermal conductivity are produced by forming a dispersion of silica in a solution of binder and organic solvent, and removing the solvent and shaping to form a shaped body. The shaped bodies retain their hydrophobicity, are stable with regards to shape, and are useful in acoustic and thermal insulation.

Abstract: It is an object of the invention to provide a rapid and economically viable process which is notable for efficient use of material, especially of the silylating agent, and by means of which organically modified lyo- or aerogels are obtained in a rapid and simple manner. This object is achieved by virtue of the invention providing a process for producing organically modified gels selected from lyo- and aerosols by (i) emulsifying a basic polar phase comprising water and starting materials for silicatic gels in a nonpolar phase containing a water-immiscible precursor for an active silylating agent, (ii) starting formation of gel and ageing by lowering the pH, and then (iii) starting the silylation and the exchange of solvent by lowering the pH. If the gels are aerogels, the gels provided can be used for thermal and/or acoustic insulation.

Abstract: The problem addressed by the invention is that of producing aerogels which have as high and permanent a hydrophobicity as possible and which have a reduced combustibility, that is as low a carbon content as possible, and are simultaneously less rigid and brittle than known systems, i.e. which with reduced combustibility have a high flexibility and high stability at the same time, that is high mechanical load-bearing capacity. Said problem is solved in that the invention provides gels chosen from lyogel or aerogel, which are synthesised from oxide units and [RxSiO(4-x)/2] units, wherein the primary particles have a change of concentration in [RxSiO(4-x)/2] units from the inside to the outside, wherein x can be the same or different and is 1 or 2, and R can be the same or different and is hydrogen or an organic substituted or unsubstituted radical, and wherein the oxide units contain [SiO4/2] units, and a method for producing same.

Abstract: 4-(dialkylchlorosilyl)butyronitriles are prepared by high yield by reacting a mixture of technical grade allyl cyanide with dialkylchlorosilanes in the presence of a catalyst of transition group 8 of the Periodic Table of the Elements, wherein the reaction is conducted such that a stoichiometric excess of the dialkylchlorosilane is present together with the catalyst in the reaction mixture, into which the allyl cyanide is metered.

Abstract: The invention relates to a method for producing hydrophilic silicia moulded bodies, in which i) a mixture containing hydrophilic silicic acid is added at a maximum temperature of 55° C. to hydrophobic means and ii) the mixture obtained in step i) is compacted after a maximum storage time of 30 days to form moulded bodies, iii) during steps ii and iii and until the moulded bodies are used, the temperature is at a maximum of 55° C.

Abstract: It is an object of the invention to provide an economically viable process for the production of hydrophobized aerogels which works both inexpensively and in a resource-conserving manner. 2.2. This object is achieved by the provision of a process for producing organically modified aerogels by producing a sol containing [SiO4/2] units and [RxSiO(4?X)/2] a units, where x may be the same or different and is 1, 2 or 3, and R may be the same or different and is hydrogen or an organic substituted or unsubstituted radical, using the sol to form a gel, surface-modifying the gel obtained in the presence of more than 0.1% by weight of a phase modifier in a mixture comprising organosiloxane and initiator, wherein the mixture contains at least 20% by weight of organosiloxane and wherein the initiator consists of acid or organosiloxane or mixtures thereof and the gels obtained are dried. 2.3. The aerogels provided can be used as insulating materials, especially in thermal insulation.

Abstract: The invention relates to methods for producing non-aggregated, modified silicon particles by treating non-aggregated silicon particles which have volume-weighted particle size distributions with diameter percentiles d50 of 1.0 ?m to 10.0 ?m at 80° C. to 900° C. with an oxygen-containing gas.