Hoechst Aktiengesellschaft

Clariant Corporation

Celanese Emulsions Gmbh

Ykk Corporation

Werner Prass

Ude Scheunemann

Donald Lupo

Helmut Ringsdorf

Tetsu Yamamoto

Kenji Motosugi

Yuan Liu

Thomas Stehlin

Werner Hickel

Akihiko Tokida

Shizuo Ogura

Martin Jakob

Werner Interthal

Christian Erdelen

Andre Laschewsky

Michael Haubs

Andreas Zimmermann

Juergen Lingnau

Rudolf Zertani

Harald Cherdron

Peter Wilharm

Uwe Falk

Christoph Roth

Gerhard Geiss

Gunther Appel

Jacqueline Bauer

Olaf Althoff

Norbert Hanold

Hans-Karl Muller

Ude Sheunemann

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.

Water-resistant adhesives, their preparation and use

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,

Process for preparing polyvinyl alcohol stabilized solvent- and

Composition containing an aerogel, method of producing said composition

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 ;

Polymer films for detecting chemical substances

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) comprises

Composite membranes and processes for their production

Optical sensor for detection of chemical species

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.

Interference enhanced optical sensor for detecting chemical species

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.

Process and device for producing ultrathin layers and layer element

Composite membrane, process for its production and its use

Radiation-sensitive film composed of at least one mono-molecular layer

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.

Amphiphilic polymers containing silane units and film comprising at

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. After evaporation of the solvent the layer is compressed and transferred to a solid support by the LB technique. The film is very stable and can be used to prepare optical waveguide systems, filters for optical purposes or protective layers.

Polyamide and film made from at least one monomolecular layer of a

Amphiphilic monomers with mixed-chain structures of the formula ##STR1## in which Y denotes --O-- or --NH--

Amphiphilic monomers with mixed-chain structure and polymers and film

Amphiphilic monomers having mixed-chain structures of the general formulae (I) or (II) ##STR1## where Y is --O-- or --NH--,

Amphiphilic monomers and polymers and film comprising at least one

Growing community of inventors

Mainz, Germany

Werner Prass