Patents by Inventor Werner Prass
Werner Prass has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 7585915Abstract: A description is given of an aqueous dispersion adhesive based on an aqueous polymer dispersion comprising at least one emulsion polymer with small amounts of crosslinkable N-methylol groups, at least one protective colloid, and at least one crosslinking agent containing N-methylol groups, of which at least one is etherified with an alkanol, said crosslinking agent being selected from the group consisting of hydroxymethylated cyclic ethyleneureas, hydroxymethylated cyclic propyleneureas, hydroxymethylated bicyclic glyoxal diureas, hydroxymethylated bicyclic malonaldehyde diureas or combinations thereof. The aqueous dispersion adhesive can be employed in particular for adhesively bonding porous and semiporous substrates.Type: GrantFiled: July 26, 2004Date of Patent: September 8, 2009Assignee: Celanese Emulsions GmbHInventors: Martin Jakob, Werner Prass
-
Publication number: 20060257673Abstract: A description is given of laminates comprising sheetlike substrate and film joined to the substrate by means of an adhesive which comprises a polymer dispersion prepared by free-radical emulsion polymerization and an organosilane which is incorporated into the polymer during the polymerization and/or is added subsequently and which in addition to at least one silane group has at least one primary, secondary or tertiary amino group or at least one epoxide group or which comprises at least one ethylenically unsaturated group and at least one silane group. Through the addition of an organosilane it is possible to produce laminates which can be processed rapidly and which are distinguished by improved embossing strength.Type: ApplicationFiled: May 13, 2006Publication date: November 16, 2006Applicant: Celanese Emulsions GmbHInventors: Ulrich Desor, Werner Prass, Josef Reitspiess
-
Publication number: 20050032970Abstract: Water-resistant adhesives, their preparation and use A description is given of an aqueous dispersion adhesive based on an aqueous polymer dispersion comprising at least one emulsion polymer with small amounts of crosslinkable N-methylol groups, at least one protective colloid, and at least one crosslinking agent containing N-methylol groups, of which at least one is etherified with an alkanol, said crosslinking agent being selected from the group consisting of hydroxymethylated cyclic ethyleneureas, hydroxymethylated cyclic propyleneureas, hydroxymethylated bicyclic glyoxal diureas, hydroxymethylated bicyclic malonaldehyde diureas or combinations thereof. The aqueous dispersion adhesive can be employed in particular for adhesively bonding porous and semiporous substrates.Type: ApplicationFiled: July 26, 2004Publication date: February 10, 2005Inventors: Martin Jakob, Werner Prass
-
Patent number: 6093766Abstract: The present invention relates to the preparation of heterogeneous, water-resistant polyvinyl ester dispersions having a film-forming temperature of below 10.degree. C., comprising the formation of a homo- or copolymer A, having a glass transistion temperature of more that 20.degree. C., by seed polymerization of a monomer mixture comprising 85-100% by weight of a vinyl ester of carboxylic acids having 1 to 18 carbon atoms,0-10% by weight of an .alpha.,.beta.-unsaturated carboxylic acid and/or of an N-functional compound and0-5% by weight of a polyethylenically unsaturated monomer in the presence of a seed base comprising a copolymer B having a glass transition temperature of below 20.degree. C., comprising45-98% by weight of a vinyl ester of carboxylic acids having 1 to 18 carbon atoms,2-50% by weight of an .alpha.-olefin having 1 to 4 carbon atoms and0-5% by weight of a polyethylenically unsaturated monomer.Type: GrantFiled: September 10, 1998Date of Patent: July 25, 2000Assignee: Clariant GmbHInventors: Martin Jakob, Werner Prass
-
Patent number: 5948314Abstract: The invention relates to a composition comprising between 30 and 95% by volume of aerogel particles and at least one aqueous binder, where the particle diameter of the aerogel particles is less than 0.5 mm and the aerogel particles preferably have hydrophobic surface groups, a process for the preparation thereof, and the use thereof.Type: GrantFiled: April 17, 1997Date of Patent: September 7, 1999Assignee: Hoechst AktiengesellschaftInventors: Gerhard Geiss, Hans-Karl Muller, Werner Prass, Ude Scheunemann, Andreas Zimmermann
-
Patent number: 5817727Abstract: The present invention pertains to a film for detecting chemical substances comprising a homopolymer or a copolymer having recurring units represented by the following formula (I): ##STR1## wherein X is --H, --F, --Cl, --Br, --CH.sub.3, --CF.sub.3, --CN or --CH.sub.2 CH.sub.3 ; and R.sup.1 is --R.sup.2 or --Z--R.sup.2 ;wherein Z is --O--, --S--, --NH--, --NR.sup.2' --, --(C.dbd.Y)--, --(C.dbd.Y)--Y--, --Y--(C.dbd.Y)--, --(SO.sub.2)--, --Y'--(SO.sub.2)--, --(SO.sub.2)--Y'--, --Y'--(SO.sub.2)--Y'--, --NH--(C.dbd.O)--, --(C.dbd.O)--NH--, --(C.dbd.O)--NR.sup.2' --, --Y'--(C.dbd.Y)--Y'-- or --O--(C.dbd.O)--(CH.sub.2).sub.n --(C.dbd.O)--O--;wherein Y is independently O or S, and Y' is independently O or NH, and n is an integer of 0 to 20;and wherein R.sup.2 and R.sup.2' represent independently a hydrogen atom, a linear alkyl group, a branched alkyl group, a cycloalkyl group, an unsaturated hydrocarbon group, an aryl group, a saturated or unsaturated hetero ring or derivatives thereof, provided that R.sup.Type: GrantFiled: June 7, 1995Date of Patent: October 6, 1998Assignee: Hoechst AktiengesellschaftInventors: Werner Prass, Thomas Stehlin, Yuan Liu, Shizuo Ogura, Tetsu Yamamoto, Akihiko Tokida, Kenji Motosugi
-
Patent number: 5665844Abstract: The present invention pertains to a film for detecting chemical substances comprising a homopolymer or a copolymer having recurring units represented by the following formula (I): ##STR1## wherein X is --H, --F, --Cl, --Br, --CH.sub.3, --CF.sub.3, --CN or --CH.sub.2 CH.sub.3 ; and R.sup.1 is --R.sup.2 or --Z--R.sup.2 ;wherein Z is --O--, --S--, --NH--, --NR.sup.2' --, --(C.dbd.Y)--, --(C.dbd.Y)--Y--, --Y--(C.dbd.Y)--, --(SO.sub.2)--, --Y'--(SO.sub.2)--, --(SO.sub.2)--Y'--, --Y'--(SO.sub.2)--Y'--, --NH--(C.dbd.O)--, --(C.dbd.O)--NH--, --(C.dbd.O)--NR.sup.2' --, --Y'--(C.dbd.Y)--Y'-- or --O--(C.dbd.O)--(CH.sub.2).sub.n --(C.dbd.O)--O--;wherein Y is independently O or S, and Y' is independently O or NH, and n is an integer of 0 to 20;and wherein R.sup.2 and R.sup.2' represent independently a hydrogen atom, a linear alkyl group, a branched alkyl group, a cycloalkyl group, an unsaturated hydrocarbon group, an aryl group, a saturated or unsaturated hetero ring or derivatives thereof, provided that R.sup.Type: GrantFiled: November 15, 1993Date of Patent: September 9, 1997Assignee: Hoechst AktiengesellschaftInventors: Werner Prass, Thomas Stehlin, Yuan Liu, Shizuo Ogura, Tetsu Yamamoto, Akihiko Tokida, Kenji Motosugi
-
Patent number: 5658669Abstract: A composite membrane comprises a porous carrier membrane (A) and a fluorine-containing permselective layer (C) which is a copolymer and has a thickness of 10 to 500 nm. The copolymer of layer (C) comprisesa) 10 to 80 mol % of monomer units of a vinyl ester of the formula (I) ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 are hydrogen, alkyl radicals, cycloalkyl radicals or aryl radicals, and these radicals together have at least 5 and not more than 30 carbon atoms,b1) 5 to 50 mol % of monomer units of a vinyl alcohol of the formula (II) ##STR2## in which R.sup.4 is the hydroxyl group and up to 10% of the groups R.sup.4 can be replaced by radicals of the formula OCOR.sup.5, in which R.sup.5 is methyl, ethyl or propyl, orb2) 5 to 50 mol % of monomer units of the formula (III) ##STR3## in which R.sup.Type: GrantFiled: May 5, 1995Date of Patent: August 19, 1997Assignee: Hoechst AktiengesellschaftInventors: Olaf Althoff, Uwe Falk, Ude Scheunemann, Werner Prass, Werner Hickel
-
Patent number: 5640234Abstract: Disclosed and claimed is an optical sensor for the detection of chemical species. The optical sensor includes an optical waveguide having a guiding thin film. The thickness of the refrative index of the guiding thin film changes due to adsorption or absorption of the chemical species or reaction of the chemical species with the guiding thin film. The thickness of the guiding thin film is above the cutoff thickness in the presence of gaseous or liquid chemical species to be detected. And, the thickness of the guiding thin film is below the cutoff thickness in the absence of such chemical species.Type: GrantFiled: November 7, 1995Date of Patent: June 17, 1997Assignee: Hoechst AktiengesellschaftInventors: Christoph Roth, Yuan Liu, Werner Prass, Tetsu Yamamoto, Kenji Motosugi
-
Patent number: 5563707Abstract: An optical sensor for detecting gaseous or liquid chemical species including a sensing element having a flat light reflecting substrate and one or more transparent thin films which are organic or inorganic films or high-polymer films and are formed on the substrate. The detection of the gaseous or liquid chemical species is effected by measuring a change in the light reflection characteristic of the sensing element based on swelling of the thin film or a change in its thickness or refractive index or changes in both parameters.Type: GrantFiled: June 6, 1995Date of Patent: October 8, 1996Assignee: Hoechst AktiengesellschaftInventors: Werner Prass, Thomas Stehlin, Yuan Liu, Shizuo Ogura, Kenji Motosugi, Akihiko Tokida, Tetsu Yamamoto
-
Patent number: 5429842Abstract: In order to continuously produce an ultrathin, ordered layer of amphiphilic molecules on the surface of a polar liquid a directed flow of the polar liquid is produced in a duct which contains the amphiphilic molecules in dissolved or undissolved form on the surface in spread form. In the duct, a duct section having a relatively high flow rate on the surface and comprising a ramp which is arranged at the bottom of the duct and washed over by the polar liquid is provided. This is followed by a duct section having a relatively low flow rate on the surface, in which the flow is dammed up at an obstacle at a liquid level constant with time, so that an ultrathin, ordered layer of amphiphilic molecules is continuously formed in these duct sections at the polar liquid/air interface by compression of the flow. The washed over ramp is movable.Type: GrantFiled: August 17, 1993Date of Patent: July 4, 1995Assignee: Hoechst AktiengesellschaftInventors: Gunther Appel, Jacqueline Bauer, Werner Hickel, Donald Lupo, Werner Prass, Ude Scheunemann
-
Patent number: 5342432Abstract: Composite membrane, process for its production and its useA composite membrane for gas separation having a three-layer structure, constructed fromA) a supporting membrane layer made of porous polymer,B) a nonporous, gas-permeable intermediate layer,C) a permselective layer of regularly arranged organic molecules having a layer thickness of 3 to 100 nm,the layers (A) and (C) enclosing the intermediate layer (B), wherein the permselective layer (C) is constructed from regularly arranged amphiphilic molecules which contain one or two alkyl chains each having 7 to 25 carbon atoms per polar hydrophilic group.Type: GrantFiled: July 2, 1994Date of Patent: August 30, 1994Assignee: Hoechst AktiengesellschaftInventors: Michael Haubs, Werner Prass
-
Patent number: 5258262Abstract: Radiation-sensitive film composed of at least one monomolecular layer of fluorine-containing amphiphiles. If a vinyl monomer containing fluoroalkyl side groups is copolymerized with a vinyl monomer containing oxirane groups, an amphiphilic polymer is obtained. To prepare a sandwich, a polymer is dissolved in a volatile organic solvent which is immiscible with water, the solution is spread on the water/air boundary surface, the resultant layer is compressed after the solvent has evaporated and transferred to a solid layer support by the Langmuir-Blodgett technique. The oxirane rings are cleaved and the film crosslinked by the action of high-energy radiation on the film.Type: GrantFiled: September 13, 1991Date of Patent: November 2, 1993Assignee: Hoechst AktiengesellschaftInventors: Christian Erdelen, Helmut Ringsdorf, Werner Prass, Ude Scheunemann
-
Patent number: 5256749Abstract: Amphiphilic copolymers containing silanyl groups and composed of derivatives of acrylic and/or methacrylic acid are described, which copolymers are suitable for the production of layer elements by the Langmuir-Blodgett method. Layer elements of this type can be used for optical waveguide systems and for the production of optical filters and for lithographic purposes.Type: GrantFiled: March 13, 1992Date of Patent: October 26, 1993Assignee: Hoechst AktiengesellschaftInventors: Werner Hickel, Donald Lupo, Werner Prass, Ude Scheunemann, Peter Wilharm
-
Patent number: 5166307Abstract: Polyamides of the general formula [N(A)-X-N(B)-CO-Y-CO-].sub.n are described, in which Y denotes a divalent group, X a divalent radical whose chain contains at least two carbon atoms, A and B independently of one another denote H or a C.sub.1 to C.sub.26 alkyl group and n denotes an integer greater than 4. The said polyamides contain at least one alkyl group of C.sub.6 to C.sub.26 per repeating unit. The groups X and/or Y contain at leat one CH.sub.2 group in the chain. The polyamides are prepared by reaction of a diamine of the formula NHA-X-NHB with an about equimolar amount of a reactive derivative of a dicarboxylic acid of the formula COOH-Y-COOH. The polyamides obtained can be used in order to prepare highly ordered monomolecular LB films on a support. For this purpose, the polyamide is dissolved in a volatile organic solvent which is immiscible with water and the solution is spread on the water/air interface.Type: GrantFiled: September 5, 1989Date of Patent: November 24, 1992Assignee: Hoechst AktiengesellschaftInventors: Harald Cherdron, Werner Prass, Ude Scheunemann, Donald Lupo
-
Patent number: 5120809Abstract: Amphiphilic monomers with mixed-chain structures of the formula ##STR1## in which Y denotes --O-- or --NH--X denotes a group of the formula --(CH.sub.2).sub.n -- or --(CH.sub.2 --O--CH.sub.2).sub.n --l denotes an integer from 0 to 10,n denotes an integer from 1 to 10,R.sup.1 denotes hydrogen, methyl, chlorine, cyano, fluorine or bromine,R.sup.2 denotes C.sub.1 -C.sub.24 -alkyl or C.sub.1 -C.sub.24 -fluoroalkyl andR.sup.3 denotes C.sub.8 -C.sub.24 -alkyl or C.sub.8 -C.sub.24 -fluoralkyl, with the proviso that the groups R.sup.2 and R.sup.3 contain a different number of carbon atoms. The monomers are polymerized on their own or together with other comonomers. The polymers obtained are suitable for the preparation of ultra-thin layers on a suitable layer support.Type: GrantFiled: December 20, 1989Date of Patent: June 9, 1992Assignee: Hoechst AktiengesellschaftInventors: Donald Lupo, Werner Prass, Ude Scheunemann
-
Patent number: 5116925Abstract: Amphiphilic monomers having mixed-chain structures of the general formulae (I) or (II) ##STR1## where Y is --O-- or --NH--,X is a group of the formula --(CH.sub.2).sub.n -- or --(CH.sub.2 --O--CH.sub.2).sub.n --,l is an integer from 0 to 10,m is an integer from 10 to 26,n is an integer from 1 to 10,R.sup.1 is hydrogen, methyl, chlorine, cyano, fluorine or bromine, andR.sup.2 is O-alkyl or NH-alkyl,are polymerized alone or together with other comonomers. The polymers obtained are suitable for preparing ultra-thin films on a suitable base material.Type: GrantFiled: October 11, 1990Date of Patent: May 26, 1992Assignee: Hoechst AktiengesellschaftInventors: Donald Lupo, Werner Prass, Ude Scheunemann
-
Patent number: 5081212Abstract: A polyurea of the general formula ##STR1## where X and Y are. independently of one another, a divalent radical whose chain contains in each case at least two carbon atoms, and A and B are, independently of one another, H or (C.sub.1 -C.sub.26)alkyl, and n is an integer greater than 4, which polyurea contains at least one (C.sub.6 -C.sub.26) alkyl group per repeating unit, is prepared by reacting the diamine NHA-X-NHB with roughly the equimolar amount of a diisocyanate OCN-Y-NCO. The polyurea is suitable for preparing ordered monomolecular LB films on a base (film-substrate-system). For this purpose it is dissolved in a volatile organic solvent which is not miscible with water, the solution is spread at the water/air interface, and the layer formed is compressed after the solvent has evaporated and it is transferred to a solid layer base by the Langmuir-Blodgett technique.Type: GrantFiled: September 29, 1989Date of Patent: January 14, 1992Assignee: Hoechst AktiengesellschaftInventors: Werner Prass, Ude Scheunemann
-
Patent number: 5034277Abstract: A film for use in nonlinear optics comprises at least one Langmuir-Blodgett layer, the layer containing or comprising a dye of the formula ##STR1## in which R.sup.1 denotes a long-chain alkoxy, acyloxy, alkylamino or acylamino group. In particular when the film contains alternating layers of unsaturated amphiphilic compounds, it produces a stable multilayer having good nonlinear optical properties and is suitable, for example, for electrooptical switches, diode laser frequency amplifiers or optical parametric amplifiers.Besides the dye indicated, the unimolecular layer can additionally contain at least one second amphiphilic compound. In this case, the unimolecular layer comprises amphiphilic compounds.Type: GrantFiled: August 20, 1990Date of Patent: July 23, 1991Assignee: Hoechst AktiengesellschaftInventors: Andre Laschewsky, Helmut Ringsdorf, Werner Interthal, Donald Lupo, Werner Prass, Ude Scheunemann
-
Patent number: 4988606Abstract: A negative-working radiation-sensitive mixture comprising a binder and a polymer containing 1,2,3-thiadiazole groups is disclosed. The binder is a polyfunctional compound having functional groups that react with ketene. The polymer is a compound obtained by polymerization of a compound of the general formula I ##STR1## in which R is a polymerizable group. If the polymer is a copolymer containing comonomers having functional groups capable of reacting with ketene, the binder can be omitted. The negative-working radiation-sensitive mixture is particularly suitable for UV, electron beam and X-ray lithography.Type: GrantFiled: October 12, 1989Date of Patent: January 29, 1991Assignee: Hoechst AktiengesellschaftInventors: Werner Prass, Rudolf Zertani, Juergen Lingnau, Norbert Hanold