Abstract: A separation device which has at least one blower device and at least one deflector device can be used to separate large fragments of semiconductor material from small fragments of semiconductor material.

Abstract: The invention relates to protective-colloid-stabilized polymer compositions in the form of their aqueous polymer dispersions or water-redispersible polymer powders, which comprise at least one film-forming base polymer and a protective colloid, wherein the protective colloid is a sulfonated condensation product made from unsaturated di- or polycarboxylic acids and from at least one compound selected from the class encompassing diols, polyols, diamines and polyamines.

Abstract: The invention proposed is an aqueous emulsion comprising the components (A) organosilicone compositions selected from (A1) C1-C20-alkyl-C2-C6-alkoxysilanes and (A2) organopolysiloxane containing alkoxy groups, (B) organopolysiloxane containing, one or more siloxane units having SiC-bonded radicals containing basic nitrogen, with the proviso that the amine number of the organopolysiloxane is at least 0.01, and (C) an emulsifier. The said emulsions are used for making porous mineral building materials hydrophobic.

Abstract: The invention relates to novel polymeric organosilicon compounds comprising hydrocarbon radicals with at least one aliphatic carbon-carbon double bond in a terminal position. To produce these compounds, (A) compounds containing at least one aliphatic carbon-carbon double bond per molecule, in a terminal position, are reacted with (B) oligomeric or polymeric organosilicon compounds containing units of the general formula R1R2SiO1/2 and units of the general formula HRSiO and/or HSiO3/2 and possibly units of the general formula R2SiO, where R is a monovalent, possibly substituted, hydrocarbon radical with between 1 and 18 carbon atoms per radical, which is free of aliphatic carbon-carbon double bonds, and R1 is a monovalent hydrocarbon radical with between 1 and 18 carbon atoms per radical which has at least one aliphatic carbon-carbon double bond in a terminal position, subject to the condition that the sum of the units HRSiO and R1R2SiO1/2 on average is greater than 2.

Abstract: Alkoxy RTV-1 compositions comprise the product of the reaction of (A) an HO-terminated organopolysiloxane, (B1) an alkoxysilane which has at least three alkoxy groups and/or its partial hydrolysates, and (B2) an alkoxysilane which has two alkoxy groups and/or its partial hydrolysates, in the presence of (C) an acid phosphoric ester of the general formula (I) (HO)aOP(—O—[(CR12)b—O]c[(CR22)d]e—L—M)(3−a)  (I), where a is 1 or 2, R1 and R2 are a hydrogen radical, methyl radical or hydroxyl radical, b and d are 2 or 3, c is an integer from 2 to 15, e is 0 or 1 L comprises a radical —O—, —COO—, —OOC—, —CONR3—, —NR4CO— or —CO—, R3 and R4 are a hydrogen radical or C1-C10-alkyl radical, and M is a monovalent, unsubstituted or hydroxyl-, fluorine-, chlorine-, bromine-, C1-C10-alkoxyalkyl- or cyano-substituted C1-C20-hydrocarbon radical, with the proviso that on any giv

Abstract: A device for simultaneously separating a multiplicity of wafers from a hard brittle workpiece having a longitudinal axis, with a wire web made from saw wire and with an advancing device which brings about a translational relative movement, which is perpendicular to the longitudinal axis of the workpiece, between the workpiece and the wire web of the wire saw, in the course of which movement the workpiece is passed through the wire web, wherein the wire web is formed from a multiplicity of individual wires, and wherein there is a device for holding and rotating the workpiece about the longitudinal axis.

Abstract: In the preparation of microcapsules having shell walls of organopolysiloxane and a core material, the shell walls are produced in situ by hydrolysis and polycondensation of organosilanes and/or their condensates having not more than 4 silicon atoms.

Abstract: In the process for the direct synthesis of methylchlorosilanes from chloromethane and silicon in the presence of a copper catalyst and promoter, the reaction mixture comprising chloromethane, methylchlorosilanes, and dust-like components comprising copper, promoter and silicon are removed continuously. The dust-like components are separated from the reaction mixture and cooled with liquid chloromethane.

Abstract: Organopolysiloxane particles containing hydrosilylation catalysts (H) and organopolysiloxane (O) and having a particle size of 0.01-10 &mgr;m have, at least in the outermost shell, no glass-transition temperature, softening point or melting point in the range 20° C.-260° C. These organopolysiloxane particles enable the preparation of one-component, addition-crosslinking, thermocurable silicone compositions having a long shelf life.

Abstract: Curable organopolysiloxane compositions comprising (D) a platinum catalyst selected from the class consisting of where R2 is an unsubstituted or substituted diene bonded to platinum via at least one &pgr; bond, having an unbranched or branched chain of from 4 to 12 carbon atoms or a ring of from 6 to 18 carbon atoms, R3 are identical or different and are a hydrogen atom, halogen atom or a monovalent, unsubstituted or halogen- or cyano-substituted hydrocarbon radical having from 1 to 24 carbon atoms, R4 are identical or different bivalent, unsubstituted or substituted hydrocarbon radicals having from 1 to 24 carbon atoms, R5 are identical or different bivalent, unsubstituted or substituted hydrocarbon radicals having from 1 to 12 carbon atoms, silane radicals or siloxane radicals, R6 are identical or different and are a hydrogen atom or a monovalent hydrocarbon radical having from 1 to 20 carbon atoms, e is an integer greater than or equal to 1, and f is 0 or 1.

Abstract: Linear organopolysiloxanes containing alpha, omega terminal Si bonded omega-alkenyl groups or alpha, omega Si bonded H are prepared via hydrosilylation.

Abstract: The invention describes new organosilicon compounds containing alkenyl groups, comprising units of the formula A a ⁢ R b ⁡ ( R 1 ⁢ O ) c ⁢ SiO 4 - ( a + b + c ) 2

Abstract: The invention provides a redispersible polymer powder based on a mixture of water-insoluble polymer and a water-soluble atomized protective colloid which can be de-activated through a pH change. In addition, the invention concerns aqueous dispersions that can be prepared with the polymer powder and the use of the polymer powder or its aqueous dispersions as a bonding agent in adhesives, plasters or paints.

Abstract: The invention concerns polysiloxane compounds which contain the following components: 1. organopolysiloxane with at least two aliphatic double bonds in the molecule; 2 organopolysiloxane with at least two Si—H groups in the molecule; 3. noble metal catalyst; and 4. hydrophilic modifier of general formula (I) [H2C═CH—A1—(A2)m—X]nB (I), in which A1, A2, X, B, m and n have the meanings given in claim 1. The polysiloxane compounds are stable during storage and are used as dental casting compounds.

Abstract: The invention relates to a process for preparing crosslinkable redispersible powders containing isocyanate groups by aqueous, emulsion copolymerization of ethylenically unsaturated monomers, at least one of which is isocyonate-functional, followed by drying, preferably spray drying, in the presence of a protective colloid.

Abstract: The invention discloses a method of using crosslinkable polymer powders for producing ballistic-resistant fiber materials, which comprises consolidating the textile sheet materials by means of pulverulent crosslinkable copolymers which are based on ethylenically unsaturated monomers and have a glass transition temperature Tg or a melting point of ≧40° C. and a melt viscosity of ≧2000 mPas.

Abstract: Mixtures of linear organopolysiloxanes of the general formula 1 for R3SiO—(SiR2O)n—SiR3  (1) are produced by a process in which organochlorosilanes of the general formula 2 R4−ySiCly  (2) where R is identical or different and is a hydrogen atom or an unsubstituted or substituted hydrocarbon radical having from 1 to 18 carbon atoms, Y is 1 or 2, and n is 0 or an integer from 1 to 50, are reacted continuously in a closed circulation system with water which may, if desired, have been acidified with hydrochloric acid, where the HCl concentration in the hydrochloric acid discharged is less than 25% by weight. Low molecular weight oligomer mixtures substantially free of both cyclic organosiloxanes and organosilicon compounds containing Si—Cl are economically produced.

Abstract: A crosslinkable powder composition is provided which is redispersible in water and comprises a) from 30 to 95 parts by weight of a water-insoluble, film-forming polymer of one or more free-radically polymerizable, ethylenically unsaturated monomers, b) from 5 to 70 parts by weight of a water-soluble polymer, where at least one of the polymer components a) and b) comprises one or more comonomer units containing reactive groups which can form a chemical, nonionic bond with one another or with crosslinkers, and the parts by weight of a) and b) add up to 100 parts by weight, and c) from 0.01 to 5% by weight, based on the total weight of a) and b), of at least one phase transfer catalyst.

Abstract: The invention relates to mixtures containing pigments which comprise oriented three-dimensionally crosslinked substances having a liquid-crystalline structure with a chiral phase, and to the use of such mixtures. Pigment and matrix are matched to one another in such a way that on application of the mixture at different temperatures to a substrate, the lowest application temperature and highest application temperature differing by at least 10° C. and by not more than 150° C., there are no visually perceptible color differences of the pigmented paint on the substrate after drying.

Abstract: The invention relates to organosilicon compounds with at least three silicon atoms, consisting of units of the formula (I) RaSi(NR1C═ONR22)k(NR3C═ONR4)t/2YmOn/2[(CR52)s]r/2, where Y represents units of the formula (II) —SiR63-p-q(NR1C═ONR22)p(NR3C═ONR4)q/2, where R, R1, R2, R3, R4, R5 and R6 independently of each other can be either identical or different and represent a hydrogen atom or possibly substituted monovalent hydrocarbon radicals with between 1 and 20 carbon atoms; and where a, k, t, n, m, r, s, p and q have the meaning assigned to them in claim 1, under the provision that the sum of p+q is ≦3, the sum of a+k+l+m+n+r equals 4, the sum of m+r equals 0 or 1, and the organosilicon compound of the invention contains at least one unit of formula (I) where t is not equal to 0.