Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Merck Patent Gmbh

Flabeg Solarglas Gmbh & Co. Kg

Other

Bayer Intellectual Property Gmbh

Bayer Innovation Gmbh

Walther Glaubitt

Andreas Gombert

Monika Kursawe

Rainer Jahn

Thomas Hofmann

Dieter Sporn

Stephan Merklein

Ertugrul Arpac

Jörn Probst

Wolfgang Graf

Sabine Amberg-Schwab

Iwer Baecker

Arne Braun

Jochen Fricke

Klaus Greiwe

Peer Löbmann

Anja Ehrig

Christian Hagendorf

Peer Loebmann

Armin Dauwalter

Miranda Rothenburger-Glaubitt

Bastian Christ

Peer L&ouml;bmann

Hans-Joachim Becker

Joern Probst

Klemens Ilse

The present invention relates to a method for producing biodegradable fibers on the basis of a silane compound, said silane compound being crosslinked during production and, at least to some extent, an organic acid being incorporated into the forming crosslinked structure via covalent bonds and/or contributing to the crosslinking. The present invention also relates to the fibers that can be produced by the method according to the invention and to the use thereof.

Highly flexible degradable fibers

The invention concerns a novel silica sol material and its use for producing bioabsorbable and biodegradable silica gel materials having improved properties. The materials such as for example fibers, fibrous nonwoven webs, powders, monoliths and/or coatings are used, for example, in medical technology and/or human medicine, in particular for wound treatment.

Silica sol material for producing bilogically degradable and/or resorbable silica gel materials, the production and use thereof

The invention relates to a nontoxic polysiloxane material and ripened polysiloxane material which has been formed using one or more different polysiloxane materials. According to the invention, such a ripened polysiloxane material can be spun, for example, into bioabsorbable and/or bioactive fibers and then be further processed into fibrous nonwoven webs.

Nontoxic polysiloxane material for producing biologically resorbable and/or bioactive articles containing polysiloxane material, its production and use

The present invention relates to a coating material containing (a) first oxidic particles formed by hydrolytic condensation, in a size range of 5-20 nm, (b) second particles with a diameter in the size range of 80-300 nm, (c) a first aqueous solvent in which the source material for the oxidic particles formed by hydrolytic condensation can be dissolved and which allows or promotes the hydrolysis and condensation thereof, and (d) at least one second solvent, selected among specifically defined alcohols, ethers, organic acids, esters, ketones, amines and amic acids and mixtures thereof. The invention relates in addition to a substrate supplied with a coating, particularly a glass suitable for the photovoltaic and warm water collector domain, wherein the coating is composed of at least two particle fractions, wherein the particles of the first fraction have a diameter in the size range of 5-20 nm, and the particles of the second fraction have a diameter in the size range of 80-300 nm, wherein the particles of the second fraction have an average distance from each other, measured from cone to cone of these particles, of on average 20-200 nm, and wherein the particles of the first particle fraction have pores with a pore radius distribution of which the maximum is between 1 and 6 nm. The coating of the substrate can be achieved by means of the named coating material.

Substrates supplied with a dust and aerosol-repellent coating, method for the production thereof and materials for this purpose

A coated glass product includes a glass substrate and a porous antireflection surface coating including SiO-based particles having a first particle fraction including a first characteristic particle size range and a second particle fraction having a second characteristic particle size range that is different from the first characteristic particle size range. In addition, a method for producing the coated glass product is provided.

Glass having a porous anti-reflection surface coating and method for producing such glass

Hybrid sol comprising [SiO(OH)]particles, where 0&#x3c;y&#x3c;4 and 0&#x3c;x&#x3c;2, which consist of a mixture of a first fraction of particles having a particle size of 4&#x2013;15 nm and a second fraction of particles having a mean particle size of 15&#x2013;60 nm, water and a solvent; obtainable by hydrolytic polycondensation of tetraalkoxysilanes in an aqueous, solvent-containing medium with addition of a monodisperse silicon oxide hydroxide sol having a mean particle size of 15&#x2013;60 nm and a maximum standard deviation of 20%, and the preparation and use thereof.

[object Object]

The invention relates to thermally tempered safety glass comprising an non-abrasive and porous SiOlayer which is stable during sintering and has a refractive index of between 1.25 and 1.40. The inventive safety glass can be obtained by coating standard soda-lime glass with an aqueous coating solution having a pH value of between 3 and 8 and containing between 0.5 and 5.0 wt. % of [SiO(OH)]particles (0&#x3c;y&#x3c;4 and 0&#x3c;x&#x3c;2) having a particle size of between 10 and 60 nm, and a surfactant mixture. The coated glass is then dried, thermally hardened at temperatures of at least 600&#xb0; C. for several minutes, and thermally tempered by a flow of air.

Aqueous coating solution having a pH of from 3 to 8, comprising 0.5-5.0% by weight of [SiO(OH)]particles, where 0&#x3c;y&#x3c;4 and 0&#x3c;x&#x3c;2, having a particle size of from 10 nm to 60 nm with a tolerance of &#xb1;10%, and from 0.005 to 0.5% by weight, based on the coating solution, of a surfactant mixture obtainable by hydrolytic polycondensation of tetraalkoxysilanes in an aqueous-alcoholic-ammoniacal medium at temperatures between 35&#xb0; C. and 80&#xb0; C., with subsequent removal of ammonia and alcohol from the resultant dispersion by steam distillation and subsequent addition of a surfactant mixture comprising 15-30% by weight of anionic surfactants, 5-15% by weight of nonionic surfactants and less than 5% by weight of amphoteric surfactants.

Aqueous coating solution for abrasion-resistant SiO2 antireflection layers

A sol-gel process for producing layers of zirconium oxide is described which comprises the following stages:

Process for depositing layers of zirconium oxide using soluble powders

A method of and a solution for making a highly porous optical antireflection coating of a selectively designed index of refraction, by applying a colloidal dispersion derived from hydrolytically condensing, in the presence of water and a catalyst, one or more silicon compounds of the general formula R,SiX,, or precondensates derived therefrom, to a substrate. In the formula, R is an organic group having from 1 to 10 carbon atoms which may be interrupted by oxygen atoms and/or sulfur atoms and/or amino groups, X is hydrogen, halogen, hydroxy, alkoxy, acyloxy, alkylcarbonyl, alkoxycarbonyl or NR&prime;,, R&prime; being hydrogen, alkyl or aryl and a being 0, 1 or 2. The solution also contains colloidally dispersed organic polymers at a molar ratio, relative to the silane, between 0.1 mmol/mol silane and 100 mmol/mol silane, the median molecular mass of the polymer being between 200 and 500,000. Sol-vents, preferably alcohol, may also be present in the solution. After being applied to an optical substrate, the solution is dried and organic components are removed from it to leave a porous coating of predetermined index of refraction.

Method of making an anti-reflection coating

A method of making porous ceramics of lead titanate (PT) or lead zirconate PZT) of a Pb(Zr.sub.x Ti.sub.1-x) O.sub.3 compound from a gel made by mixing at least 2.5 equivalents of water based on the compound with a solution prepared from a polar solvent having complexing and chelating properties, one or more Pb(II) and PB(IV) carboxylates and at least one compound including titanium and zirconium of the general formula M(OR).sub.4 where M is titanium or zirconium and R is similar or different groups representing at least one of a straight chain, cross-linked and cyclic alkyl and alkenyl group with 1 to 10 carbon atoms, aging the resulting gel beyond its gel point, replacing the solvent in the pores of the gel by a chelating solvent, drying the resulting gel under supercritical conditions and tempering the resulting aerogel.

Method of making porous ceramics of a Pb (Zr.sub.x Ti.sub.1-x) O.sub.3

The invention relates to viscous, aluminium-containing liquids suitable for roducing gel threads, filaments or fibres, a process for the production thereof and the use thereof for the production of alumina-containing, inorganic fibres. The liquids according to the invention comprise one or more partly or completely hydrolytically condensable compounds of aluminium and optionally further elements and/or precondensates derived from said compounds. The hydrolytically condensed Al-compounds are derived from compounds of formula (I)

Viscous liquid suitable for producing gel threads or fibres, process for

The intermediate product which is used in a method of making a molded arte, especially an endless PZT fiber, is itself made by a method including mixing an organic zirconium compound, Zr(OR.sup.1).sub.4, and an organic titanium compound, Ti(OR.sup.2).sub.4, R.sup.1 and R.sup.2 being C.sub.1 - to C.sub.10 -alkyl groups, separately or together with 0 to 4 moles of at least one alcohol of the formula R.sup.3 --X--R.sup.4 --OH or R.sup.3 --CX--R.sup.4 --OH, X being O, S or an amine group and R.sup.3 and R.sup.4 being C.sub.1 - to C.sub.10 -alkyl groups, per mole of the zirconium and titanium compounds; reacting the zirconium and titanium compounds in the resulting mixture or mixtures with one to three moles of at least one C.sub.2 - to C.sub.10 -carboxylic acid per mole of the zirconium and titanium compounds to form at least one reaction mixture; mixing the at least one reaction mixture and reacting with 1 to 1.5 moles of one or more Pb(II)-carboxylates and/or Pb(IV)-carboxylates per mole of the zirconium and titanium compounds to form a combined mixture; subjecting this combined mixture to a hydrolytic condensation and then removing the volatile components from it to form a solid mass at ambient temperatures.

Molded article based on PZT (Pb(Zr,Ti)0.sub.3, lead zirconate-lead

A process for producing UV or UV/IR or IR/UV-hardened coatings on substrates by applying a coating compound to the substrate to be coated and by the action of UV radiation, or combined UV/IR or IR/UV radiation, as well as UV or UV/IR or IR/UV-hardenable coating compounds comprising a component A, which is a solution of a complexed, metal organic Ti or Zr compound with polymerizable ligands, a component B, which is a hydrolyzate of one or more radically polymerizable alkoxy silanes of general formula ##STR1## and 0.1 to 5% by weight of a component C, which is an initiator for the polymerization.

Growing community of inventors

Margetshoechheim, Germany

Walther Glaubitt