Abstract: The present invention is a scar-reducing plaster and a method for preparing scar-reducing plasters. The scar-reducing plasters comprise a backing film comprising an air- and water vapor-pervious and water-impervious polymer layer, and a breathable and adhesive polyurethane xerogel matrix layer that coats the backing film. The polyurethane xerogel matrix layer includes a central scar contact region and an edge region, wherein the scar contact region merges with the edge region and the thickness of the edge region decreases from the scar contact region to a thickness of from 5 to 150 ?m at the edge of the polyurethane xerogel matrix layer. The scar-reducing plasters of the present invention have a reduced tendency to peel off during normal use.

Abstract: A dressing especially for covering wounds or preventing or treating blisters, comprising a water vapor pervious carrier film uniformly covered with an adhesive layer, wherein there is centrally disposed on the adhesive layer a water vapor pervious polyurethane matrix which is beveled from an especially central point to the edge of the adhesive layer, although the periphery of the adhesive layer is at least partially not covered by the polyurethane matrix.

Abstract: Active substance plasters consisting of a backing material and an at least partially applied adhesive composition, characterized in that a component comprising one or more active substances is additionally applied in the form of spun fibres or filaments to the backing material, this component having an at least partly thermoplastic basis.

Abstract: The invention relates to a method for the automatic production of a filter installation that consists of a plurality of structural parts or elements. The inventive method comprises the following steps: choosing a field of application of the filter installation to be produced among a plurality of predetermined or predeterminable fields of application and/or choosing a design of the filter installation to be produced among a plurality of predetermined or predeterminable designs; producing an input field depending on the choice made, only those inputs being enabled in said input field that correspond to the choice made. The invention further relates to a computer program product and to a computer system for the automatic production of a filter installation that consists of a plurality of structural parts or elements.

Abstract: A process for preparing tertiary amine oxides with a low nitrosamine content by reacting a tertiary amine with an aqueous solution of hydrogen peroxide, which comprises using as starting material tertiary amines whose total content of primary and secondary amines is not more than 0.05% by weight.

Abstract: The invention relates to highly reactive polyoxyalkylene-polyols prepared by oxyalkylation of an initiator molecule containing, in bonded form, at least 2 reactive hydrogen atoms and at least one tertiary amino group bonded via a spacer bridge, which preferably comprises an alkylene radical having at least 3 carbon atoms, by means of at least one alkylene oxide, preferably ethylene oxide and/or 1,2-propylene oxide, to a process for the preparation of these polyoxyalkylene-polyols, and to their use for the production of compact or cellular, preferably flexible polyisocyanate polyaddition products.

Abstract: A process for the preparation of 4-substituted imidazoles of the general formula ##STR1## in which R denotes C.sub.1 -C.sub.20 alkyl, C.sub.3 -C.sub.20 cycloalkyl, aryl, and C.sub.7 -C.sub.20 aralkyl,whereina) N-formyl-.alpha.-aminonitriles of the general formula I ##STR2## in which R has the meanings stated above and A stands for carbonyl, are reacted, at a temperature ranging from 20.degree. to 200.degree. C. and a pressure ranging from 20 to 500 bar, with hydrogen in the presence of hydrogenation catalysts andb) the resulting N-formyl-1,2-diamines of the general formula ##STR3## in which R and A have the meanings stated above and n stands for 0 or 1, are reacted over a cyclization/dehydrogenation catalyst at a temperature ranging from 200.degree. to 600.degree. C. and a pressure ranging from 0.001 to 5 bar.

Abstract: Polytetrahydrofuran derivatives of the general formula ##STR1## where n is from 2 to 70, X is the bridge member --NH-- or --O-- and R.sup.1 to R.sup.4 are each hydrogen or various radicals.

Abstract: A process for the preparation of a 1,4-alkylenediamine of the general formula I ##STR1## in which the substituents R.sup.1 and R.sup.2 are independently hydrogen, C.sub.1 -C.sub.10 -alkyl, phenyl or benzyl, by reacting a succinic dinitrile of the general formula II ##STR2## in which R.sup.1 and R.sup.2 have the meanings stated, with hydrogen at a temperature of from 30.degree. to 250.degree. C. and a pressure of from 50 to 350 bar in contact with a hydrogenation catalyst, wherein the hydrogenation catalyst used contains cobalt oxide and one or more oxides of the elements iron, nickel, manganese, chromium, molybdenum, tungsten, and phosphorus and one or more oxides of elements in the alkali metal group, alkaline earth metal group, and rare earth group of the Periodic Table, and of scandium, and/or of yttrium.

Abstract: A process for the preparation of a 2-(3-aminopropyl)-cycloalkylamine of the general formula I ##STR1## in which the subscript n is an integer from 1 to 4, from a 2-(2-cyanoethyl)-cycloalkanone of the general formula II ##STR2## in which the subscript n has the meaning stated, wherein the following stages are carried out in discrete reaction chambers:a) the 2-(2-cyanoethyl)-cycloalkanone of formula II is reacted in a first reaction chamber with excess ammonia over an acidic heterogeneous catalyst at a temperature from 20.degree. to 150.degree. C. and a pressure of from 15 to 500 bar, andb) in a second reaction chamber, the reaction product from stage a) is hydrogenated at a temperature of from 60.degree. to 150.degree. C. and a pressure of from 50 to 300 bar in the presence of excess ammonia over a catalyst containing cobalt, nickel, ruthenium, and/or some other noble metal, which catalyst optionally contains a basic component or is supported on neutral or basic supporting material.

Abstract: Poly(1,4-butanediol-.omega.,.omega.'-mercaptans) have the general formulaHS--(CH.sub.2).sub.4 --O--[(CH.sub.2).sub.4 --O].sub.n --(CH.sub.2).sub.4 --SH Iwhere n is from 1 to 150.

Abstract: A process for the preparation of a 2-pyrrolidinone of the general formula I ##STR1## in which R.sup.1 and R.sup.2 are independently hydrogen, C.sub.1 -C.sub.20 -alkyl, or C.sub.3 -C.sub.8 -cycloalkyl optionally substituted by C.sub.1 -C.sub.4 -alkyl, or phenyl optionally substituted by C.sub.1 -C.sub.4 -alkyl,by reacting a 3-cyanopropionate of the general formula II ##STR2## in which R.sup.1 and R.sup.2 have the meanings stated above and R.sup.3 denotes C.sub.1 -C.sub.8 -alkyl,with hydrogen at elevated temperature and pressure, wherein the reaction is carried out in the presence of ammonia and in contact with a catalyst containing cobalt, manganese, and phosphorus.

Abstract: A process for the preparation of amines of the formula ##STR1## in which R.sup.1 is the radical H.sub.2 N-CH.sub.2 and R.sup.2 is hydrogen, or R.sup.1 and R.sup.2 together form a bridging group --CH.sub.2 --, by reacting 1,3,6-tricyanohexane at elevated temperature and pressure with hydrogen in contact with a catalyst containing, in addition to cobalt oxide, and oxide of an alkali metal, an oxide of an alkaline earth metal, an oxide of a rare earth or an oxide of scandium or yttrium.

Abstract: Polytetrahydrofuran derivatives of the general formula ##STR1## where n is from 2 to 70, X is the bridge member --NH-- or --O-- and R.sup.1 and R.sup.4 are each hydrogen or various radicals.

Abstract: A process for the preparation of N-substituted pyrrolidin-2-ones of the general formula I ##STR1## where R.sup.1 is C.sub.1 - to C.sub.20 -alkyl, C.sub.6 - to C.sub.10 aryl or C.sub.7 - to C.sub.12 -aralkyl comprises hydrogenolytically cleaving 5-iminopyrrolidin-2-ones of the general formula II ##STR2## in which the R.sup.1 radicals are identical or different C.sub.1 - to C.sub.20 -alkyl, C.sub.6 - to C.sub.10 -aryl or C.sub.7 - to C.sub.12 -aralkyl, at super-atmospheric pressure and elevated temperature in the presence of a hydrogenation catalyst to give the pyrrolidin-2-ones I; specifically, the 5-iminopyrrolidin-2-ones of the formula II are obtained by reacting .beta.-cyanopropionic acid esters of the general formula III ##STR3## where R.sup.2 is C.sub.1 - to C.sub.20 -alkyl, C.sub.7 - to C.sub.12 -aralkyl or C.sub.6 - to C.sub.10 -aryl, with an amine of the general formula IVR.sup.1 --NH.sub.2 IVwhere R.sup.1 is as defined above.

Abstract: A process for the preparation of N-substituted pyrrolidones by catalytic hydrogenation of maleic anhydride, maleic acid and/or fumaric acid in the presence of ammonia uses at least stoichiometric amounts of a primary alcohol or of an aldehyde and uses a catalyst which comprises cobalt and at least one of the elements manganese, copper, phosphorus, molybdenum and/or sodium.