Abstract: Redispersable polymer powder compositions are provided which contain homopolymers or copolymers of ethylenically unsaturated monomers and cyclodextrins or cyclodextrin derivatives having the general formula (I), ##STR1## in which n=6, 7 or 8, the substituents R are identical or different and cover H or R.sup.1, the substituents R.sup.1 are identical or different and cover for optionally substituted C.sub.1 -C.sub.4 -alkyl, carboxy-C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -carboxyly residues. Also disclosed are a process for preparing these compositions and their use, as well as polymer dispersions stabilised with cyclodextrins or cyclodextrin derivatives obtained as intermediate products.

Abstract: Aqueous organopolysiloxane emulsions, especially those which can be crosslinked by addition of Si-bonded hydrogen onto aliphatic multiple bond, their preparation with an emulsifier combination comprising alkylphenyl polyglycol ether and polyvinyl alcohol with a low degree of hydrolysis, and their use for preparing anti-adhesive coatings.

Abstract: In a process for the direct synthesis of methylchlorosilanes by reacting methyl chloride with a catalytic composition comprising silicon, copper catalyst and promoters, where at least some of the catalytic composition is comprised of the catalytic composition from a prior production campaign.

Abstract: The invention provides a process for improving the resistance to solvents in finishing and stabilizing fiber materials with textile binders, wherein the textile binder used is an aqueous copolymer dispersion or a redispersible copolymer powder of copolymers with a T.sub.g of -60.degree. C. to +60.degree. C., containing (a) one or more monomer units from the group consisting of vinyl esters of unbranched or branched carboxyli acids with 1 to 12 carbon atoms, esters of acrylic acid and methacrylic acid with unbranched or branched alcohols with 1 to 12 carbon atoms, vinyl aromatics, vinyl halides and .alpha.-olefins, and (b) 0.3 to 10 wt %, relative to the total weight of the copolymer, of one or more N-(alkoxymethyl)-acrylamides or N-(alkoxymethyl)methacrylamides with a C.sub.1 -C.sub.6 alkyl residue, or mixtures of these N-(alkoxymethyl)-meth(acrylamides with N-Methylolacrylamide and/or N-methylolmethacrylamide in a weight ratio of N-methylol compound to N-(alkoxymethyl) compound of at most 5:1.

Abstract: Novel crosslinkable compositions are described, comprising (A) organopolysiloxanes containing aliphatically unsaturated hydrocarbon radicals, comprising;(a) at least one unit, per molecule, of the formula ##STR1## in which A is a radical of the formula--(OSiR.sup.1 R.sup.2).sub.z --(OSiR.sub.2).sub.x --Y--SiR.sub.2 O.sub.1/2,R is identical or different and is a monovalent, aliphatically saturated or aromatic hydrocarbon radical having 1 to 12 carbon atoms per radical,R.sup.1 is a radical of the formula --OSiR.sub.2 --Y--SiR.sub.2 O.sub.1/2,R.sup.2 has the meaning of R, R.sup.1 or R', where R' is a monovalent, aliphatically saturated or aromatic hydrocarbon radical having 1 to 12 carbon atoms per radical, which contains one or more heteroatoms chosen from the group consisting of O, S, N, Si and Ti,Y is a divalent hydrocarbon radical of the formula --CH.sub.2 CHR.sup.5 (--R.sup.4).sub.v --, in whichR.sup.

Abstract: The invention concerns a dispersion powder composition which is redispersible in water and is made from water-insoluble homopolymers or copolymers of preferably ethylenically unsaturated monomers and one or more organosilicon compounds plus, optionally, other additives such as protective colloids and anti-blocking agents. The composition is obtained by: a) polymerizing one or more monomers in the presence of 0.1 to 30% by wt., relative to the total weight of the monomers, of one or more silicon compounds which are dispersible in water and which have a boiling point at normal pressure of >160.degree. C., selected from the group comprising the silanes, polysilanes, oligosiloxanes, polysiloxanes, carbosilanes, polycarbosilanes, carbosiloxanes, polycarbosiloxanes and polysilylenedisiloxanes and: b) spray-drying the product thus obtained, either before or after addition of the additives mentioned.

Abstract: Biologically degradable aqueous dispersions of vinyl ester polymers are provided which have a solids content of 20 to 70% by weight, based on the total weight of the dispersions, and have been prepared by free radical polymerization by the emulsion polymerization process, wherein, in the presence of10 to 50% by weight, based on the monomer phase, of biologically degradable plasticizer and 0.5 to 15.0% by weight, based on the monomer phase, of biologically degradable emulsifier and/or biologically degradable protective colloid,a monomer phase comprisinga) 50 to 100 parts by weight of one or more vinyl esters from the group comprising vinyl esters of unbranched or branched alkylcarboxylic acids having 1 to 15 C atoms,b) 0 to 30 parts by weight of ethylene and/or an ester of (meth)acrylic acid or ethylenically unsaturated dicarboxylic acids from alcohols having 1 to 10 atoms andc) 0 to 20 parts by weight of other mono- or poly-ethylenically unsaturated compounds, is polymerized.

Abstract: The invention relates to compositions which crosslink to give elastomers, have a viscosity of 1,000 to 100,000 mPa.multidot.s and are based on (A) hollow bodies of plastic and (B) crosslinkable organosilicon compounds.

Abstract: An epoxy resin molding material comprising an epoxy resin, a phenolic resin and a powder flexibilizer which has a core-shell structure composed of a solid silicone core and an organic polymer shell is a reliable epoxy resin molding material for sealing electronic parts which is excellent in, for example, thermal shock resistance and reflow soldering resistance, and is free from the troublesome deterioration in, for example, the appearance and marking properties of molded products, and to provide a semiconductor sealed by the molding material.

Abstract: Cosmetic compositions which comprise waxy organosiloxanes, which are solid at room temperature, of the formulaR.sup.1 R.sub.2 Si--O--SiR.sub.2 R.sup.1 (I),in whichR can be identical or different and represents an alkyl radical having 1 to 4 carbon atoms andR.sup.1 can be identical or different and represents a linear alkyl radical having at least 16 carbon atoms,volatile organosiloxanes chosen from the group comprising hexamethyldisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and mixtures thereof, and optionally other substances.

Abstract: The invention relates to coating compositions for producing watertight, vapor-permeable and flame-retardant coatings, comprising a vinyl chloride copolymer or vinyl acetate/ethylene dispersion, flameproofing agents, foam stabilizer and optionally crosslinkers. The invention further relates to a process for producing watertight, vapor-permeable and flame-retardant coatings by mechanically foaming the coating composition to produce a stable foam, applying the foam to a woven, knitted or nonwoven support material on one or both of the sides and drying it at a temperature of from 60.degree. to 180.degree. C. and optionally, after drying, compressing the foam layer. The textile support materials coated with the coating composition are suitable for use in building protection and in the geotextile sector.

Abstract: A process for the continuous preparation of organopolysiloxane by condensation and/or equilibration reaction of organosilicon compounds comprisingin a first stepconveying an organosilicon compound, catalyst which is solid in the reaction mixture at least at the reaction temperature and, optionally, additives continuously from the bottom upwards through a heated cylindrical reactor which is arranged in a standing position and whose contents can be agitated mechanically andin a second steppassing the reaction mixture obtained after leaving the reactor at the upper end thereof continuously through a cylindrical reactor andin a third stepfreeing the reaction mixture obtained of catalyst after exit from the reactor.

Abstract: Polyorganosiloxane rubber compositions which cure to elastomers under the influence of heat comprise 0.01 to 1 part by weight of ammonium, alkali metal or alkaline earth metal carbamate. The green strength of the rubber compositions is increased by the addition of carbamate. At the same time, the compression set of the vulcanized rubbers are reduced.

Abstract: The invention relates to organopolysiloxane copolymers having at least one Si-bonded vinyloxy-functional group and their preparation. The compositions of the present compound crosslink particularly rapidly under light.

Abstract: Catalytic dehalogenation (or hydrodehalogenation) of halogen-containing compounds of elements of group IV of the periodic table in the presence of hydrogen is carried out using a finely-dispersed catalytically active material which comprises silicon and at least one transition metal, and which is characterized by high catalytic activity and stability. This process can be used, for example, for synthesizing compounds or alternatively for decomposing halogen-containing compounds, for instance in waste-water or waste-gas purification processes. It is also suitable for dehalogenation (hydrodehalogenation) of halogen-containing silane compounds, for instance of silicon tetrachloride or alkyl trichlorosilane compounds, and the original purity of the silanes used as starting materials is retained by the products. Tetrachlorosilane, for example, can be converted into trichlorosilane.

Abstract: The invention relates to the preparation of organopolysiloxane microemulsions, wherein the components (A) organopolysiloxane, (B) emulsifier, (C) water, optionally, (D) cosurfactant and optionally (E) acid are brought together and mixed in any desired sequence. Microemulsions are formed spontaneously without introduction of energy in the form of heat or severe shearing forces.

Abstract: The invention relates to core/shell copolymer dispersions whose shell comprises hydrolyzable organosilicon comonomers, the shell consisting of a copolymer comprising,a) from 70 to 95% by weight of acrylic and/or methacrylic C.sub.1 to C.sub.10 alkyl esters of which from 20 to 80% by weight, based on the overall weight of a), have a water-solubility of not more than 2 g/l and from 80 to 20% by weight, based on the overall weight of a), have a water-solubility of at least 10 g/l,b) from 5 to 25% by weight of one or more ethylenically unsaturated, functional and water-soluble monomers including a proportion of from 25 to 100% by weight, based on the overall weight of b), of unsaturated carboxylic acids, andc) from 0.01 to 10% by weight of one or more olefinically unsaturated, hydrolyzable silicon compounds of the general formula R.sup.1 --Si(OR.sup.2).sub.

Abstract: New organopolysiloxane masses cross-linkable into elastomers by radical formation containing (1) high-viscosity diorganopolysiloxanes with a value equal to at least 3000 Nm, (2) low-viscosity vinyl-containing organopolysiloxanes having 20 to 1.10.sup.6 mPa.multidot.s at 25.degree. C. consisting of siloxane units (M units) having the formulae R.sup.1 R.sub.2 SiO.sub.1/2 and/or R.sub.3 SiO.sub.1/2, of siloxane units (D units) having the formulae R.sup.1 RSiO and/or R.sub.2 SiO and optionally HRSiO, and of siloxane units (T or Q units) having the formulas RSiO.sub.3/2 and/or R.sub.1 SiO.sub.3/2 and/or SiO.sub.2, in which R stands for a monovalent, possibly substituted hydrocarbon residue with 1 to 18 hydrocarbon atoms and R.sub.1 stands for a vinyl residue, provided that the organopolysiloxanes contain at least 1.0% by weight Si-bound vinyl groups; as well as (3) fillers.

Abstract: Care compositions for hard surfaces, which can be prepared using organopolysiloxanes which are solid at room temperature, contain fluorine groups and can change their state of aggregation reversibly on the basis of changes in temperature.

Abstract: The organosilanes and organopolysiloxanes containing groups which form free radicals and are soluble in organic solvents, processes for their preparation, macromonomers and graft copolymers from the organosilanes and organopolysiloxanes according to the invention as free radical initiators and organic monomers which can be polymerized by free radicals, a process for the preparation of the macromonomers and graft copolymers and their use.