Abstract: The invention refers to a pressure sensor comprising a membrane which separates a measuring device receiving the deformation of the membrane caused by pressure from the pressurised pressure space. The pressure sensor is formed by a basic body. The pressure sensor is set in a wall defining the pressure space. The membrane is orientated essentially parallel to the surface normal line of this opening.

Abstract: The invention refers to a pressure sensor comprising a membrane which separates a measuring device receiving the deformation of the membrane caused by pressure from the pressurised pressure space. The pressure sensor is formed by a basic body. The pressure sensor is set in a wall defining the pressure space. The membrane is orientated essentially parallel to the surface normal line of this opening.

Abstract: The invention relates to a dental ceramic comprising a sintered body that has a share of more than 90% by weight hydroxylapatite (HA; Ca5(PO4)3OH). The ceramic is easy to produce and highly stable, and in addition offers a natural-looking appearance if the sintered body is anisotropic.

Abstract: A method is disclosed for the manufacture of a ceramic material for fillings or dental prostheses, which includes the steps of forming a precipitation product having at least one slightly soluble calcium phosphate compound, which has at least two phases of crystals; the slightly soluble calcium phosphate compound being a replacement for dental tissue. The precipitation product further includes a freely soluble compound dissolvable in the saliva of a patient's mouth and which creates a porous structure within the slightly soluble phase. The pores of this structure are filled by precipitating ions from the patient's saliva. The precipitation product is then sintered and dried, before being explosively compressed to form the ceramic dental filing material.

Abstract: A method of producing a ceramic material based on calcium phosphate compounds for use in dental medicine by adding a phosphate solution to a calcium salt solution, separating the precipitation formed in the reaction solution from the mother liquor, drying, crushing and sintering is characterised in that at least one orthophosphate and at least one diphosphate, each in solution, are added to the calcium salt solution, wherein the molar ratio of diphosphate to orthophosphate is in the region of 0.001 to 0.03:1, and keeps the pH-value of the reaction solution in which the precipitation is formed in the region of 7.5 to 12 until the end of the reaction.

Abstract: Two phase remineralizing compositions are described comprising a source of calcium ions and a source of phosphate ions together with a water soluble polyphosphate salt.

Abstract: A bioactive ceramic material for dental fillings and crowns on the basis of calcium phosphate compounds contains crystallites of sparingly water-soluble calcium phosphate compounds in an amorphous, vitreous or polycrystalline matrix of readily water-soluble calcium phosphate compounds, the Ca/P-atomic ratio of the calcium phosphate compounds being altogether <1.65.

Abstract: A process for the treatment of a material having an aluminum oxide layer comprising (a) treating the aluminum oxide layer with an aqueous solution of a pure and crystalline alkali metal silicate, and (b) rinsing the treated aluminum oxide layer with ion-containing water. A substrate so produced is useful in offset printing.

Abstract: A process for the treatment of a material having an aluminum oxide layer comprising (a) treating the aluminum oxide layer with an aqueous solution of a pure and crystalline alkali metal silicate, and (b) rinsing the treated aluminum oxide layer with ion-containing water. A substrate so produced is useful in offset printing.

Abstract: The present invention relates to a process for producing bristle materials suitable for inserting into toothbrushes and based on synthetic fibres which have been roughened on their surface by mechanical action, in particular by means of a blast apparatus, the roughening being accomplished on the endless fibre strand after stretching. Using these bristle materials, toothbrushes with an improved plaque-removing action can be produced.

Abstract: The invention described a multilayer recording medium for optical information for use in a single recording operation and the process for its production. The multilayer recording medium essentially comprises a support and a layer comprising an unsubstituted naphthalocyanine dye. A binder layer is disposed between the support and the dye layer or the dye layer carries a binder layer which, in turn, is coated with a dye layer. Moreover, the invention describes composite systems, in particular, adhesive-bonded systems constructed from these multilayer recording media. As compared to recording media of the prior art, the media and composite systems according to the present invention exhibit a high reflectivity and require a lower write-pulse energy, while maintaining a particular contrast ratio.

Abstract: An electrophotographic recording material is described that comprises an electrically conducting base layer and a photoconductive system deposited thereon, which system comprises an optional insulating intermediate layer, a layer containing a charge-generating compound, and a layer containing a charge-transporting compound mixed with binders, along with any sensitizers, acceptors and usual additives. The photoconductive system contains, as acceptor additive, one or more monomeric or polymeric compounds that have electron-attracting substitutents (halogen, cyano, nitro groups) and that are selected from the group consisting of anthracene, acridine, the anhydrides of phthalic acid, maleic acid, pyromellitic acid, benzophenonetetracarboxylic acid, and the polymers of vinyl chloride, vinylidine chloride and nitrocellulose, in a quantity of 0.2 to 10% by weight based on total coating weight.

Abstract: An electrophotographic recording material is comprised of an electrically conducting film base, an optional, adhesion-promoting, insulating intermediate film and at least one binder-containing photoconductive film that also contains a charge-carrier generating compound and pyrazoline charge-transporting compound represented by the formula ##STR1## in which n denotes zero or 1 andR.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 respectively denote hydrogen or halogen, preferably chlorine or bromine.Such a recording material has a low pre-exposure sensitivity combined with very good photosensitivity, and a low residual charge level in cyclic behavior. The charge-transporting compound has a low tendency to crystallize out in the film.

Abstract: An electrophotographic recording material comprising an electrically conducting layer support, an optional insulating intermediate layer, a photoconductive layer comprising at least one dyestuff as charge carrier-generating compound, and a layer containing a binder and photoconductor as charge-transport compound contains, as dyestuff in the photoconductive layer, a benzo-benzimidazo[1,2a]-quinoline derivative, preferably one represented by the formula ##STR1## Use of the dyestuff, in combination with a wide variety of photoconductors and binders, yields materials with excellent electrophotographic properties.

Abstract: An electrophotographic recording material comprises an electrically conductive base material, an optional insulating intermediate layer and a photoconductive layer comprising at least one layer containing an asymmetrically substituted perylene-3,4,9,10-tetracarboxylic acid imide as charge carrier producing compound, a photoconductor as charge transport compound, binder and customary additives. The asymmetrically substituted perylene-3,4,9,10-tetracarboxylic acid imide can, for example, be represented by the formula ##STR1## where R denotes hydrogen, alkyl, hydroxyalky, alkoxyalkyl, aryl or aralkyl and A denotes phenylene, naphthylene or a more highly fused aromatic carbocylic or heterocyclic radical which can each be substituted by halogen, alkyl, cyano or nitro groups. This material is suitable in double-layer arrangement for highly light sensitive systems, and in a single layer for preparing printing forms or printed circuits.

Abstract: The photoconductor of an electrophotographic recording material comprising an electrically conductive support, an optional insulating interlayer, and a photoconductive single layer containing a binder, a dye or pigment sensitizer and a pyrimido[5',4':5,6]pyrido[1,2-a]benzimidazole charge transporting compound represented by the formula ##STR1## wherein R.sub.1 and R.sub.2 are identical or different and are hydrogen or an R.sub.3,R.sub.4 N group; R.sub.3 and R.sub.4 are identical or different and are (C.sub.1 to C.sub.4)-alkyl, hydroxy-(C.sub.1 to C.sub.4)-alkyl, phenyl or benzyl which are unsubstituted or (C.sub.1 to C.sub.4)-alkyl-substituted, or, together with the N atom to which they are bonded, are an imidazolyl or triazolyl group; and R.sub.5 is a benzothiazole, a benzoxazole or a benzimidazole group, is photosensitive in the visible range around 430 to 500 nm and can be sensitized for the longer-wavelength region with dyes.

Abstract: An electrophotographic recording material comprising an electrically conductive base material, an option insulating intermediate layer, and a photoconductive double layer comprised of a charge-generating and a charge-transporting layer employs a pyrimido[5' ,4':5,6]-pyrido-[1,2-a]-benzimidazole transport compound, along with a binder and a dye or pigment, in the charge transporting layer, which compound is represented by the formula I ##STR1## wherein R.sub.1 and R.sub.2 are identical or different and denote hydrogen or an R.sub.3 R.sub.4 N group; R.sub.3 and R.sub.4 are identical or different and denote (C.sub.1 to C.sub.4)-alkyl, hydroxy-(C.sub.1 to C.sub.4)-alkyl, optionally (C.sub.1 to C.sub.4)-alkyl-substituted phenyl or benzyl, or, together with the nitrogen atoms to which they are bonded, an imidazolyl or a triazolyl group; and R.sub.5 denotes a benzothiazole, a benzoxazole, a benzimidazole or a cyano group.

Abstract: The present invention relates to an electrophotographic recording material composed of an electrically conducting coating support which is suitable, in particular, for the manufacture of printing forms or printed circuits, and a photoconductive insulating coating which contains a dye, in dispersion, which is a compound according to the general formula ##STR1## in which X is an oxygen atom, or a sulfur atom, or a CO group, andA is a --CO--B--CO-- group, in whichB is an oxygen atom or a --NR.sub.1 -- group, in whichR.sub.1 is a hydrogen atom, or an alkyl, alkenyl or alkoxyalkyl group with, in each case, at least 1 to 4 carbon atoms, or is an unsubstituted or substituted pheynl or benzyl radical,R.sub.2, R.sub.3 and R.sub.4 are identical or different, and are a hydrogen atom or a halogen atom, or an alkyl or alkoxy group with, in each case, at least 1 to 4 carbon atoms, or an amino or nitro group,n is 1 to 4, p is 1 or 2, andR.sub.5 is a hydrogen atom or, together with R.sub.

Abstract: An electrophotographic recording material comprised of an electrically conductive support, an optional insulating interlayer, a photoconductive system comprised of at least one layer of organic material containing a charge carrier-producing compound and a charge-transporting compound, and a radiation-cured, transparent protective layer, wherein the protective layer has been applied onto the surface of the photoconductive system with the aid of a removable auxiliary support and is comprised of an acrylated binder which is cured by irradiation with ultraviolet light. Also disclosed is a process for the production of the recording material.

Abstract: An electrophotographic recording material comprising an electrically conductive support, an optional insulating intermediate layer, at least one photoconductive layer comprising a charge carrier generating compound and a charge transporting compound, and a protective transparent cover layer made from a surface abrasion resistant binder composed of a polyurethane resin, polycarbonate resin, phenoxy resin, polyacrylate or polymethacrylate resin, polyurethane formed from a two-component system comprising a polyisocyanate and a hydroxyl group containing polyester or polyether, a polyisocyanate and a hydroxyl group containing acrylic or epoxy resin, polyurethane formed from a one-component system comprising a polyisocyanate prepolymer, or a polyisocyanate having temporarily masked isocyanate groups.