Basf Aktiengesellschaft

Gerd Rehmer

Andreas Boettcher

Rainer Blum

Gerhard Auchter

Rolf Osterloh

Hans Sander

Peter Horn

Eckehardt Wistuba

Michael Portugall

Kaspar Bott

Oral Aydin

Heinz-Dieter Lutter

Bernd Reck

Hans Schupp

Gernot Franzmann

Bertold Bechert

Johannes Dobbelaar

Maria G Rau

Reinhard B&auml;cher

Gerhard Ramlow

Helmut Jaeger

Walter Holtrup

Juergen Barwich

Reinhard Baecher

Heinrich Hartmann

Gerhard Nestler

Michael Kroener

Wilfried Heide

Manfred Niessner

Hans-Juergen Degen

Wilhelm Friedrich Beckerle

Josef Neutzner

Manfred Schwartz

Gerhard Bauer

Lothar Franz

Andreas Stange

Peter Keller

Robert Rupaner

Werner Hinz

Hans U Schmidt

Wolfgang Druschke

Sigberg Pfohl

Bernhard Dotzauer

Wolfgang H&uuml;mmer

Martin Meister

Bernd Stanger

Johannes T&uuml;rk

Sven Lawrenz

Volkmar Weberndoerfer

Peter Pfoehler

Karl-Clemens Peters

Helmut Teichmann

Lothar Matthaei

Franz-Josef Mueseler

J&uuml;rgen Hartmann

J&uuml;rgen Nahstoll

R&uuml;diger F&uuml;ssl

Axel Ferber

Reinhard B&auml;echer

Andreas Boettchher

Karlheinz Schwarz

In a process for preserving a mineral molding by coating the surface of the mineral molding with an aqueous composition comprising an aqueous polymer dispersion, the dispersed polymer P comprises an ethylenically unsaturated acid of the 2-acrylamido-2-methylpropanesulfonic acid type polymerized into it in free-radically polymerized form.

Aqueous (meth)acrylate polymer dispersion

Preservation of a mineral molding

At least one single-stage or multistage stirrer which produces not only a tangential flow component but also an axial flow field is used in a stirred-vessel reactor in connection with the preparation of polymers by liquid phase polymerization.

Use of a single-stage or multistage stirrer to prepare polymers

Readily filterable and deodorizable aqueous dispersions of pressure-sensitive adhesive, especially for self-adhesive labels, having solids contents of more than 65%, can be prepared with readily reproducible properties by copolymerizing esters of acrylic and/or methacrylic acid in the presence of less than 50 ppm of inhibitor and, preferably, in the presence of from 0.01 to 5% by weight of reducing agent by a special emulsion technique. The highly concentrated pressure-sensitive adhesive dispersion, subsequently deodorized with steam, is free from coagulum and seediness.

Production of highly concentrated adhesive dispersions and their use

A method of emptying vessels containing dispersions, solutions or suspensions of polymers in which during the emptying process the liquid medium also used to take up the polymers into the dispersion, solution or suspension is passed into the space within the vessel that is not filled by the solution, dispersion or suspension, wherein the liquid medium used to take up the polymers into the dispersion, solution or suspension is introduced in vapor form.

Method of preventing or reducing formation of polymeric deposits in vessels during emptying

A method of filling and emptying storage tanks containing aqueous dispersions, where the storage tank is emptied via a line whose opening is located in the lower section of the storage tank entails filling the storage tank with a line whose outlet follows the changes in the level of the liquid surface in the course of filling and removal procedures, the level of the outlet being adjusted such that the opening is located approximately at the height of the level of the liquid.

Filling and emptying of storage tanks containing aqueous dispersions

A process for compounding polymer dispersions, which comprises circulating the polymer dispersion from a vessel (7) having a stirring device (6) through a line (3) having a mixing device (2) by means of a pump (4) which is located in the line (3), and, before the entry of the circulated polymer dispersion into the mixing device (2), metering at least one solution or dispersion of at least one compounding material from at least one stock container (5) via a supply line (9) into the circulated polymer dispersion.

Compounding of polymer dispersions

UV-crosslinkable materials based on (meth)acrylate copolymers and containing from 0.01 to 10% by weight, based on the copolymer, of copolymerized monomers of the formula I ##STR1## where x is alkyl of 1 to 3 carbon atoms or is phenyl which is unsubstituted or substituted by n Y groups, Y is --H, --CF.sub.3, --O-- alkyl and/or alkyl-COO--, where alkyl in each case is of 1 to 4 carbon atoms, halogen, --CH, --COOH or a non-ortho --OH group, n is from 0 to 4 and Z is a group of the formula ##STR2## where R is H or C.sub.1 -C.sub.4 -alkyl and A is an alkylene, oxaalkylene or polyoxaalkylene radical of 2 to 12 carbon atoms are used as hotmelt adhesives, for coating sheet-like mineral substrates and as surface coatings.

(Meth)acrylate copolymer based UV-crosslinkable materials

Abstract of the Disclosure: Polymers of olefinically unsaturated monomers and solutions of these polymers are obtainable by a process in which the olefinically unsaturated monomers are polymerized in the presence of a free radical initiator in solution under polymerization conditions which are otherwise predetermined, in such a way that the solvent and/or a liquid part of one or more reactants of the polymerization batch are initially taken and heated to the polymerization temperature, and some or the total amount of the monomers to be polymerized is fed continuously to the agitated initially taken part of the polymerization batch via one or more feeds, with maintenance or initiation of the polymerization, in such a way that the outlet orifice of the one or more feeds is located below the surface of the initially taken liquid part of the polymerization batch.

Polymers of olefinically unsaturated monomers and solutions of these

The invention relates to UV-crosslinkable copolymers built up from

UV-crosslinkable copolymers

Radiation-reactive mixtures suitable for producing insulating layers and printed circuits are composed of certain precursors for preparing polyimides polyisoindoloquinazolinediones, polyoxazinediones, polyquinazolinediones or polyquinazolones and aryl-containing carbonyl compounds which when excited by UV radiation are capable of hydrogen abstraction, these mixtures undergoing solubility differentiation on irradiation with actinic light.

Radiation-sensitive mixture and use thereof

Synthetic resins are obtainable by chemically bonding one or more compounds of the general formula I ##STR1## where R.sup.1 is --OH, --NH.sub.2, ##STR2## --NHR.sup.3 or ##STR3## R.sup.2 is --H, --CH.sub.3 or --C.sub.2 H.sub.5, R.sup.3 is --C.sub.m H.sub.2m+1, where m is from 1 to 6, R.sup.4 is --H or --CH.sub.3 and n is from 1 to 12, via the oxygen or nitrogen atom of R.sup.1 to one or more polymers A which consist of

Contact adhesives for self-adhesive articles

UV-crosslinkable materials based on (meth)acrylate copolymers and containing special modified unsaturated benzophenone derivatives as copolymerized units are used as hotmelt adhesives, for coating sheet-like mineral substrates and as surface coatings.

Benzophenone derivatives and their preparation

Radiation-sensitive, ethylenically unsaturated compounds and a process for their preparation. The ethylenically unsaturated organic compounds are of the general formula ##STR1## where R is alkyl, aryl or a radical R.sup.1 and

Radiation-senstive, ethylenically unsaturated, copolymerizable compounds

Unsaturated phenone derivatives of the general formula I ##STR1## where

Unsaturated phenone derivatives and their use as contact adhesives

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Beindersheim, Germany

Gerd Rehmer