Abstract: The invention describes novel organosilicon compounds containing oligoisobutylene or polyisobutylene groups and comprising at least one unit of the formulaA.sub.a R.sub.b SiX.sub.c O.sub.4-(a+b+c)/2, (I)where R are identical or different and are each a monovalent, divalent or trivalent unsubstituted or substituted hydrocarbon radical, X are identical or different and are each a chlorine atom or a radical of the formula --OR.sup.1, where R.sup.1 is a hydrogen atom or an alkyl radical which may be substituted by an ether oxygen atom, or a radical of the formula--R.sup.2 ([OCH(CH.sub.3)CH.sub.2 ].sub.e [OCH.sub.2 CH.sub.2 ].sub.f [O(CH.sub.2).sub.4 ].sub.g OR.sup.3).sub.y (II)where R.sup.2 is a divalent or trivalent, unsubstituted or substituted hydrocarbon radical which is substituted by one or more groups of the formulae--(C.dbd.O)--O--, --(C.dbd.O)--NR.sup.3 --, --NR.sup.3 --, --O--, --S--,R.sup.3 is a hydrogen atom or R.sup.1 or a radical of the formula--(C.dbd.O)--R.sup.

Abstract: The invention relates to a process for altering the viscosity of organopolysiloxanes, wherein clay which has been treated with mineral acid and subsequently heated to from 250.degree. C. to 1200.degree. C. is used as catalyst. In the process, only small amounts of volatile siloxanes, in particular only small amounts of cyclic molecules, are formed.

Abstract: An apparatus for the optoelectronic classification of semiconductor materials, has a separating device 2 and a slide face 3, the angle of the slide face 3 to the horizontal being adjustable, and the separating device 2 and the slide face 3 each having a surface made of the semiconductor material to be separated. There is a radiation source 5, through the beam path of which the material to be classified falls, and a shape recognition device 6, which transmits the shape of the material to be classified to a control unit 7, which controls at least one diverter device 8.

Abstract: The invention relates to organopolysiloxanes which have aliphatically unsaturated radicals, are soluble to at least 80 wt % in organic solvents selected from xylene and toluol at a temperature of 25.degree. C. and a pressure of from 900 to 1100 hPa and contain at least one unit of the following formula (I) R.sup.1.sub.a R.sub.2-a SiO.sub.2/2, at least one unit of the following formula (II) R.sup.1.sub.b R.sub.3-b SiO.sub.1/2, at least one unit of the following formula (III) O.sub.1/2 R.sub.2 SiO.sub.x YRSiO.sub.2/2, and optionally at least one unit of the following formula (IV) O.sub.1/2 R.sub.2 SiO.sub.x YR.sub.2 SiO.sub.1/2, in which:R can be identical or different and is a monovalent, substituted or unsubstituted, SiC-bonded, aliphatically saturated hydrocarbon radical.R.sup.1 can be identical or different and is a monovalent, SiC-bonded, substituted or unsubstituted, aliphatically unsaturated hydrocarbon radical,a is 0, 1 or 2,b is 0, 1, 2 or 3,x is 0 or 1 andy is a radical --(CR.sup.3.sub.2).sub.n CHR.

Abstract: A process is disclosed for stabilizing and dispersing vegetable oils which contain polyunsaturated fatty acid radicals by means of .gamma.-cyclodextrin, as well as the thus obtained complexes and their use. In this process for stabilizing vegetable oils having a high proportion of triacylglycerines and containing polyunsaturated fatty acids, cyclodextrin is mixed with vegetable oil and so a cyclodextrin/vegetable oil complex is formed. This process is characterized in that .gamma.-cyclodextrin is used to form complexes with vegetable oils.

Abstract: A method and device for fragmenting semiconductor material, comprising at least two spaced-apart electrodes, which consist of the semiconductor material which is to be fragmented. Each electrode has a heating device. The electrodes pass high voltage current through the semiconductor material to fragment it. The device eliminates the risk of contanimation of the semiconductor material as compared with conventional methods.

Abstract: The mechanical properties of addition-crosslinked silicone rubber are improved when the silicone rubber is brought into contact with a compound (A) having at least one aliphatically unsaturated multiple bond. In particular, the compression set is lowered.

Abstract: The invention relates to alkoxy-crosslinking RTV1 silicone rubber mixtures based on polydiorganosiloxanes with dialkoxyorganosiloxy end groups, the organo radical being a substituted amidoalkyl radical, which can be prepared using conventional mixing technologies. The novel RTV1 silicone rubber mixtures cure rapidly and without tack to give products with good mechanical properties. The shelf-life of the mixtures is excellent. One particular advantage of this invention is that it is also possible to create systems in which crosslinking produces only elimination products which are completely free from toxic methanol.

Abstract: A process is provided for the preparation of powder compositions, containing organosilicon compounds and redispersible in water, by spray drying of an aqueous mixture containing one or a plurality of organosilicon compounds and one or a plurality of water-soluble organopolymers in the presence of antiblocking agents. The invention is characterized in that a portion of the antiblocking agent is conveyed to the dried powder stream, as long as it is still suspended in the stream of gas, or the remainder of the antiblocking agent is added to the dried powder.

Abstract: A suspension for the solvent-free production of silicone resin-bonded papers based on sheet silicates, which consists of:(a) 100 parts by weight of a sheet silicate,(b) 100 to 10,000 parts by weight of water,(c) 0.1 to 5 parts by weight of at least one silane of formula (I):(R'O).sub.a SiR.sub.4-a (I)in which R denotes substituted or unsubstituted hydrocarbon radicals having 1 to 20 carbon atoms and R' denotes C.sub.1-10 -alkyl, aryl, alkylaryl or hydrogen and a assumes a value from 1 to 3, and/or the partial hydrolysis product thereof,(d) 1 to 50 parts by weight of a pulverulent silicone resin of formula (II):(R'O).sub.b SiR.sub.C O.sub.(4-b-c)/2 (II)in which R and R.sup.1 have the abovementioned meaning and b assumes a value from 0 to 0.5 and c a value from 0.7 to 1.3, with the proviso that at least 5 parts by weight of the silicone resin of formula (II) are used per part by weight of the compound of formula (I),(e) 0.

Abstract: The invention relates to organopolysiloxane compounds which can be stored subject to the exclusion of moisture, can be cross-linked by cleaving of alcohols to form elastomers when moisture gains access at room temperature and are based on (A) polydiorganosiloxanes with organyloxy groups, optionally (B) organyloxy functional cross-linkers with at least three organyloxy groups, and optionally (C) condensation catalysts, characterised in that they contain at least one (D) compound selected from the compounds (D.sub.a) to (D.sub.f) given in claim 1.

Abstract: Organopolysiloxane particles useful as catalysts, are cross-linked, comprise a single molecule, have chemically bound metallic compounds and an average diameter of from 5 to 200 nm and are soluble in at least one solvent chosen from dichloromethane, pentane, acetone, ethanol and water to at least 1% by weight. At least 80% of the particles have a diameter which deviates a maximum of 30% from the average diameter.

Abstract: A process for preparing silicon granules with a chlorine contamination below 50 ppm by weight by deposition of elemental silicon on silicon particles in a fluidized-bed reactor. This reaction has a heating zone below a reaction zone. The silicon particles, in the heating zone, are fluidized by means of an inert silicon-free carrier gas to produce a fluidized bed and are heated by means of microwave energy. The silicon particles are reacted within the reaction zone, a reaction gas made up of a silicon source gas and the carrier gas. The average temperature of the reaction gas in the reaction zone, while the gas is perfusing the fluidized silicon particles, is maintained at less than 900.degree. C. The average temperature of the fluidized silicon particles in the reaction zone, while they are being perfused by the reaction gas, is maintained at greater than 900.degree. C.

Abstract: Higher alkoxysilanes are prepared efficiently and in high yield by transesterification of lower C.sub.1-4 alkoxysilanes with C.sub.6-38 higher alcohols at reduced pressure with continuous removal of lower alcohol. The products have little or no lower alkoxy content, and are free of coloring impurities.

Abstract: The organopolysiloxane compositions are prepared by mixing(1) organopolysiloxanes which contain on average at least 2 aliphatic carbon-carbon multiple bonds per molecule,(2) prehydrophobized oxidic reinforcing fillers having a carbon content, obtained by the hydrophobizing, of at least 0.5% by weight and(3) compounds which are chosen from(3a) silanol compounds of the formulaR--[SiR.sub.2 --O--].sub.a H (I)in whichR is identical or different monovalent, C.sub.1 - to C.sub.10 -hydrocarbon radicals which are free from aliphatic carbon-carbon multiple bonds anda has values from 1 to 10, and(3b) saturated C.sub.1 - to C.sub.18 -alkanols.

Abstract: The invention relates to alkoxy-crosslinking RTV1 silicone rubber mixtures based on hydroxy-terminated polydiorganosiloxanes containing a trialkoxysilane with a substituted amidoalkyl radical, which can be prepared using conventional mixing technologies. The novel RTV1 silicone rubber mixtures cure rapidly and without tack to give products with good mechanical properties. The shelf-life of the mixtures is excellent. One particular advantage of this invention is that it is also possible to create systems in which crosslinking produces only elimination products which are completely free from toxic methanol.

Abstract: Compositions which crosslink to form elastomers and are based on(A) hollow polymer bodies,(B) addition-crosslinkable organosilicon compounds, and(C) organic sulfur compounds.

Abstract: The present invention relates to triazine-containing organosilicon compounds having units of the formulaA.sub.a R.sub.b X.sub.c SiO.sub.(4-a-b-c)/2 (I),whereR is identical or different and denotes a hydrogen atom or a monovalent substituted or unsubstituted hydrocarbon radical, having 1 to 26 carbon atoms, preferably 1 to 18 per radical,X is identical or different and is a halogen atom, a chlorine atom or a radical of the formula --OR.sup.1, where R.sup.1 denotes an alkyl radical, having 1 to 18 carbon atoms, preferably 1 to 8 per radical and which may be substituted by an ether oxygen atom,a is 0 or 1, preferably 0.01-0.5b is 0, 1, 2 or 3, preferably 0.5-3.0c is 0, 1, 2 or 3, preferably 0.0-2.0 and the sum a+b+c.ltoreq.4, preferably 0.1-3.5, andA is a radical of the formula ##STR1## where R.sup.

Abstract: Organosilicon compounds with amino-alkylene oxide functional groups containing amino groups are disclosed.

Abstract: Compositions obtained by mixing oxygen-containing phosphazenes with tertiary alcohols at a temperature of from 0.degree. C. to 70.degree. C. and a pressure of from 900 to 1100 hPa are useful in processes for equilibrating and/or condensing organosilicon compounds.