Abstract: The present invention relates to the use of diureides of dicarboxylic acids of the formula I in which R is hydrogen or SO2O⊖M⊕, M⊕ is lithium, sodium, potassium, cesium, ammonium, copper, silver, 0.5 iron, 0.5 calcium, 0.5 magnesium, 0.5 manganese, 0.5 zinc or 0.5 cobalt and X is a saturated or monounsaturated, straight-chain or branched C1- to C8-alkyl which may be interrupted by oxygen or NH and which may have attached to it C1- to C4-alkoxy, hydroxyl and/or amino groups, as slow-release fertilizers and to novel diureides of the formula Ia in which R is SO2O⊖M⊕, M⊕ is lithium, sodium, potassium, cesium, ammonium, copper, silver, 0.5 iron, 0.5 calcium, 0.5 magnesium, 0.5 manganese, 0.5 zinc or 0.5 cobalt and n is 1, 2, 3 or 4, and a process for their preparation.

Abstract: The present invention relates to the use of diureides of dicarboxylic acids of the formula I 1

Abstract: The present invention relates to the use of diureides of dicarboxylic acids of the formula I in which R is hydrogen or SO2OM⊕, M is lithium, sodium, potassium, cesium, ammonium, copper, silver, 0.5 iron, 0.5 calcium, 0.5 magnesium, 0.5 manganese, 0.5 zinc or 0.5 cobalt and X is a saturated or monounsaturated, straight-chain or branched C1-to C8-alkyl which may be interrupted by oxygen or NH and which may have attached to it C1-to C4-alkoxy, hydroxyl and/or amino groups, as slow-release fertilizers and to novel diureides of the formula Ia in which R is SO2OM⊕ M is lithium, sodium, potassium, cesium, ammonium, copper, silver, 0.5 iron, 0.5 calcium, 0.5 magnesium, 0.5 manganese, 0.5 zinc or 0.5 cobalt and n is 1,2,3 or 4, and a process for their preparation.

Abstract: The description relates to novel liquid-crystalline polyesters containing the following repeating units: A having the formula: ##STR1## and B having the formula ##STR2## The novel polyesters are of use e.g. as starting materials for production of fibres with improved mechanical properties. They can either be converted as such into fibres or can be added to conventional fibre-forming matrix polymers.

Abstract: The invention relates to a hydrogel which is a copolymer of a polymerizable monomer mixture which containsa) 2-85 mol-% of a hydrophobic vinyl monomer with at least three fluorine atoms,b) 2-80 mol-% of a hydrophobic polyhydroxy vinyl monomer whose hydroxyl groups are in protected form,c) 2-70 mol-% of a hydrophilic vinyl monomer and,d) based on the total amount of monomers a)-c), 0-5 mol-% of a crosslinker, in which hydrogel the hydroxyl groups of the segments formed by the monomers b) are in protected or in free form.These hydrogels can be used, for example, as contact lenses, intraocular lenses or in other areas of application where biologically tolerated materials are required.

Abstract: The invention relates to a hydrogel which is a copolymer of a polymerizable monomer mixture which containsa) 2-85 mol-% of a hydrophobic vinyl monomer with at least three fluorine atoms,b) 2-80 mol-% of a hydrophobic polyhydroxy vinyl monomer whose hydroxyl groups are in protected form,c) 2-70 mol-% of a hydrophilic vinyl monomer and,d) based on the total amount of monomers a)-c), 0-5 mol-% of a crosslinker, in which hydrogel the hydroxyl groups of the segments formed by the monomers b) are in protected or in free form.These hydrogels can be used, for example, as contact lenses, intraocular lenses or in other areas of application where biologically tolerated materials are required.

Abstract: An offset litho or other surface printing press has a printing image carrier with image areas defined by water repelling and water-wettable properties. In order to make possible a reconfiguration of the image directly in the press the printing image carrier is in the form of an electrically conducting substrate, as for example nickel, M which is coated with a polymer to define such areas. The deposition of the polymer is controlled electrochemically with the plate cylinder acting as one electrode and the opposite electrode being in the form of a roller able to rotate in an electrolyte container. One of the two electrodes is in the form of matrix and is activated in a manner in conformity with a pattern of halftone dots corresponding to the desired image. Dependent on whether the polymer is hydrophobic or hydrophilic, the ink accepting areas or either the coated or non-coated parts of the substrate.

Abstract: Hydrophilic silicone rubber article, the surface of which is hydrophilized partly or completely by reaction (equilibration reaction) with organosiloxanes, the organosiloxanes being synthesized by the reaction of SiH-group-containing siloxanes with allyl compounds which contain protected OH groups. These articles are particularly useful as contact lenses and intraocular lenses.

Abstract: The invention relates to a surface printing press with a printed image carrier having an image thereon corresponding to the matter to be printed on paper or the like. The image on the printed image carrier is in the form of hydrophilic and hydrophobic areas. In order to be able to modify the extents and positions of these areas on the press directly and thus reduce press idle times the printed image carrier is made of a material such as polymer whose said areas may be changed over dotwise between the said hydrophilic and hydrophobic conditions by electrical effects taking place in an electrochemical process with one electrode being formed by the plate cylinder and the counter-electrode being formed by a roller bearinged for rotation in an electrolyte container. One of the two electrodes is in the form of matrix and is operated so as to produce a pattern of dots.

Abstract: A modified silicone rubber with dimethylsiloxane and urethane units in the main chains, which are cross linked through methyl groups. This material is hydrophilic and suitable as a contact lens material.

Abstract: The invention relates to fusible, electrically conductive N-arylpyridinium-TCNQ complexes of the formula ##STR1## in which m is zero or an integer from 0 to 2 andR represents an optionally substituted aryl radical, and their use for preparing conductive coatings on substrates.

Abstract: The invention relates to a process for the production of doped heterocyclic polymers, wherein sulphur-free heteroaromatic compounds are reacted with arsenic pentafluoride, optionally in the gas phase or in an inert organic solvent, at temperatures of from -20.degree. C. to +80.degree. C. (or the boiling point of the solvent), and to the doped heterocyclic polymers obtained according to this process,as well as to doped products of polymers according to the following formula ##STR1## wherein X=O or S, andn an integer of >10,and a process for the production thereof.

Abstract: Process for the production of doped polymers containing heteroaromatic 5-membered rings in which polymers of aromatic 5-ring membered heterocyclic compounds or low molecular weight compounds containing heterocyclic 5-membered rings are reacted with nitronium or nitrosonium salts, optionally in inert organic solvents, at temperatures of from -20.degree. C. to +80.degree. C. or up to the boiling point of the solvents, and the doped polymers containing heteroaromatic 5-membered rings obtained by this process.

Abstract: Reaction products of poly-(2,5-thiophendiyl) and arsenic pentafluoride.The black complexes are insoluble solids. Due to their high electric conductivity they can be used as conductors of electric currents. Suitable applications are, e.g., sheet-form conductors for heating systems or electrodes for electrical batteries.

Abstract: Process for rendering silicone rubber contact lenses hydrophilic by first reacting the silicone rubber with an oligomeric siloxane containing SiH groups in the presence of a catalyst and then subjecting the resulting equilibrated silicone rubber to a reaction with an aqueous base; or a silane addition reaction with a reactant containing C.dbd.C double bonds.