Walter Denzinger

Bio: Walter Denzinger is an academic researcher from Bosch. The author has contributed to research in topics: Monomer & Acrylic acid. The author has an hindex of 19, co-authored 117 publications receiving 1254 citations. Previous affiliations of Walter Denzinger include Agfa-Gevaert.

Formaldehyde-free aqueous binders

Abstract: Formaldehyde-free aqueous binders containing: A) a polymer consisting of 5 to 100 wt% of an ethylenically unsaturated acid anhydride or an ethylenically unsaturated bicarboxylic acid, the carboxylic acid groups of which can form an anhydride group, and B) an alkanol amine with at least two hydroxyl groups.

Preparation of water-soluble copolymers containing vinylamine units, and their use as wet strength agents and dry strength agents for paper

Abstract: Water-soluble copolymers containing copolymerized vinylamine units are prepared by copolymerizing (a) from 95 to 10 mol % of N-vinylformamide and (b) from 5 to 90 mol % of an ethylenically unsaturated monomer from the group consisting of vinyl acetate, vinyl propionate, C 1 -C 4 -alkyl vinyl ethers, the esters, nitriles and amides of acrylic acid and methacrylic acid and N-vinylpyrrolidone, and then eliminating from 30 to 100 mol % of the formyl groups from the copolymer. Preferred copolymers are copolymers of N-vinylformamide and vinyl acetate, in which from 30 to 100 mol % of the monomer units are hydrolyzed. The copolymers are used in papermaking to increase the dry strength and wet strength of the paper.

Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use

Abstract: (1) Graft polymers (I) obtainable by polymerisation of (A) monomers or monomer mixts. comprising (A1) 10-100 % (all pts. wt.) N-vinylcarboxylic amides. CH2=CH-N(R2)C(O)R' (1), where R1, R2 = H or 1-6 C alkyl (A2) 0-90 % other monoethylenically unsatd., carboxylic gp.-free monomer copolymerisation with (A1) (A3) 0-5 % monomer with at least 2 ethylenically unsatd., non-conjugated double bonds in mol. in presence of (B) mono-, oligo-, or poly-saccharide; oxidatively, hydrolytically, or enzymatically degraded polysaccharide; oxidatively-hydrolytically or oxidatively-enzymatically degraded polysaccharide; chemically modified mono-, oligo-, or poly-sacchardie, or mixt. of these in ratio (A):(B) = 95-20:5-80 and op. subsequent splitting off of gp. -C(:O)R1 from polymerised monomers (A) of (I) with formation of units -CH2-CNHR2H- are claimed. (2) Also claimed are (I) obtainable by process wherein mixt. of 1-99 % N-vinylformamide (II) and 99-1 % vinyl acetate (III) is used as (A), 2-100 % formyl gps. of polymerised (II) are split off with formation of units -CH2-C(NH2)H- (3) and 2-100 % acetate gps. of polymerisated (III) and split off with formation of units -CH20C(OH)H- (4). USE/ADVANTAGE - Dry- and wet-stength agents in prepn. of paper, carboard, and paperboard, (I), prepd. partly with renewable raw materials, are less expensi

Graft copolymers of monosaccharides, oligosaccharides, polysaccharides and modified polysaccharides, the preparation thereof, and their use

Abstract: Graft copolymers obtainable by free radical-initiated copolymerization of (A) a monomer mixture comprising (a) a monoethylenically unsaturated C 4 - to C 8 -dicarboxylic acid, or an anhydride, alkali metal salt or ammonium salt thereof, (b) a monoethylenically unsaturated C 3 - to C 10 -carboxylic acid, or an alkali metal salt or ammonium salt thereof, (c) if desired another monoethylenically unsaturated monomer which can be copolymerized with monomer (a) and (b), and (d) a monomer containing two or more ethylenically unsaturated, non-conjugated double bonds in the molecule, in the presence of (B) a monosaccharide, oligosaccharide, polysaccharide, oxidatively, hydrolytically or enzymatically degraded polysaccharide, oxidized, hydrolytically or enzymatically degraded polysaccharide, or chemically modified monosaccharide, oligosaccharide or polysaccharide, in the weight ratio (A):(B) of (95 to 20):(5 to 80), a process for the preparation of the graft copolymers, and detergents and cleaners containing the graft copolymers in amounts of from 01 to 20% by weight, are described

Process for preparing vinyl amine-containing water soluble copolymers and their use as wet and dry strength agents for paper

Abstract: Verfahren zur Herstellung Vinylamin-Einheiten einpolymerisiert enthaltenden wasserloslichen Copolymerisaten durch Copolymerisieren von a) 95 bis 10 Mol-% N-Vinylformamid und (b) 5 bis 90 Mol-% eines ethylenisch ungesattigten Monomeren aus der Gruppe Vinylacetat, Vinylpropionat, C₁- bis C₄-Alkylvinylether, der Ester, Nitrile und Amide von Acrylsaure und Methacrylsaure und N-Vinylpyrrolidon und anschliesendes Abspalten von 30 bis 100 Mol-% der Formylgruppen aus dem Copolymerisat. A process for the preparation of polymers containing vinylamine units water-soluble copolymers obtained by copolymerizing a) from 95 to 10 mol% of N-vinylformamide and (b) 5 to 90 mol% of an ethylenically unsaturated monomer from the group vinyl acetate, vinyl propionate, C₁- to C₄- alkyl vinyl ethers, the esters, nitriles and amides of acrylic acid and methacrylic acid and N-vinylpyrrolidone and subsequent cleavage from 30 to 100 mol% of the formyl groups from the copolymer. Vorzugsweise kommen Copolmerisate aus N-Vinylformamid und Vinylacetat in Betracht, deren Monomereneinheiten zu jeweils 30 bis 100 Mol-% hydrolysiert sind. Preferably Copolmerisate of N-vinylformamide and vinyl acetate are considered whose monomer units are hydrolyzed to each 30 to 100 mol%. Die Copolymerisate werden bei der Herstellung von Papier zur Erhohung der Trocken- und Nasfestigkeit des Papiers verwendet. The copolymers are used in the manufacture of paper to enhance the dry and wet strength of the paper.

Laundry detergent composition

Abstract: A laundry detergent composition containing an effective amount of a soil release agent comprising a vinyl caprolactam resin and a standard detergent formulation.

Binders and materials made therewith

Abstract: A curable aqueous composition is disclosed comprising a carbohydrate, a crosslinking agent, and an amine base, wherein the curable aqueous composition has a pH adjusted by the amine base. Further disclosed is a method of forming a curable aqueous solution.

Locating and tracking a user in a wireless network through environmentally profiled data

Abstract: A method for locating a user in a wireless network is disclosed. A mobile computer which seeks to determine its location within a building detects the signal strength of one or more wireless base stations placed at known locations throughout the building. An environmentally profiled table of known locations within the building and the base station signal strength at those locations is searched to find the stored signal strength most similar to the signal strength detected. The location corresponding to the most similar stored signal strength is determined to be the current location of the mobile computer. The table can be derived empirically, by placing a mobile computer at the known locations and measuring the signal strength of the wireless base stations at those locations, or it can be derived mathematically by taking into account a reference signal strength, the distance between the reference point and the known location, and the number of intervening walls between the reference point and the known location. As an alternative, the base stations can measure the signal strength of the mobile computer. In such a case, the table would relate a known position of the mobile computer to the signal strength of the mobile computer as measured by the one or more base stations. Environmental profiling is achieved by comparing several different tables, corresponding to several different environments, and using the table that minimizes the error. Environmental profiling can be applied to tables determined empirically or mathematically.

Using a derived table of signal strength data to locate and track a user in a wireless network

Abstract: A method for locating a user in a wireless network is disclosed. A mobile computer seeking to determine its location within a building detects the signal strength of one or more wireless base stations placed at known locations throughout the building. The mobile computer uses this measured signal strength to determine its location via a signal-strength-to-location table look-up. A table of known locations within the building and the base station signal strength at those locations is searched to find the most similar stored signal strength to the signal strength detected. The location corresponding to the most similar stored signal strength is determined to be the current location of the mobile computer. Alternatively, a number of signal strengths from the table can be used and the corresponding locations can be spatially averaged to determine the location of the mobile computer. The table can be derived empirically, by placing a mobile computer at the known locations and detecting the signal strength of the wireless base stations at those locations, or the table can be derived mathematically by taking into account a reference signal strength, the distance between the reference point and the known location, and the number of walls between the reference point and the known location. As an alternative, the base stations can detect the signal strength of the mobile computer. In such a case, the table would relate a known position of the mobile computer to the signal strength of the mobile computer at that location as detected by the one or more base stations.

Process for preparing an aqueous polymer dispersion

Abstract: A process for preparing an aqueous polymer dispersion using alkenes having from 4 to 40 carbon atoms.