Bayer Aktiengesellschaft

Agfa-gevaert Ag

Gunter Sackmann

Heinz Baumgen

Gunter Kolb

Joachim Konig

Friedhelm Muller

Ulrich Beck

Siegfried Korte

Sergej Schapowalow

Rolf-Volker Meyer

Joachim Probst

Bruno Bomer

Wolfgang Himmelmann

Heinrich Alberts

Wulf Von Bonin

Horst Jager

Jan Mazanek

Klaus Szablikowski

Herbert Bartl

Herbert Hugl

Florin Seng

Wolfgang Henning

Martin Ullrich

Wolfgang Koch

Wolf-Dieter Schroer

Udo W Hendricks

Udo-Winfried Hendricks

Wolfgang Oberkirch

Rudolf Meyer

Fritz Puchner

Eberhard Kuckert

Wolfgang Sauerteig

Helmut Brod

Gunther Reichert

Frank Kobelka

Joachim Kochta

Rolf Bruck

Jurgen-Rolf Hassdenteufel

Klaus-Dieter Albrecht

Heinz Fischer

Heinz Kolbl

Henricus Slaats

Hans-Ludwig Honig

Peter Kruck

Klaus Lesche

Hans Lietz

Super-absorbent polymer in the form of pre-formed spherical particles obtainable by alkaline hydrolysis of aqueous emulsions of crosslinked and/or un-crosslinked homopolymers and/or copolymers of acrylonitrile in water/alcohol mixtures and the use of the polymer in hygiene products, as a water-storing material in agriculture and for the sheathing of electrical cables.

Pre-formed super absorbers with high swelling capacity

A process for the continuous production of superabsorbent polymers, characterised in that aqueous emulsions of uncross-linked and cross-linked polyacrylonitrile homopolymers and/or copolymers, the polyacrylonitrile concentrations in the reaction mixture being from 10 to 45 w.t. %, are hydrolysed with aqueous alkali hydroxide solutions at 50.degree. to 100.degree. C. in a continuously operating reactor suitable for carrying out highly viscous reactions, and that from the highly viscous gels formed the products in the form of superabsorbent powders are continuously precipitated by means of continuous precipitation using low-boiling monoalcohols, and the use thereof in sanitary articles, as water-storing materials in agriculture or for sheathing electrical cables.

Process for the continuous production of superabsorbent polymers from

Superabsorbent polymers based on partly hydrolysed homopolymers and/or copolymers of acrylonitrile which are cross-linked through the incorporation of polyfunctional monomers, wherein 30 to 80 mol-% of the nitrile groups are converted into carboxylate groups, 20 to 70 mol-% of the nitrile groups are converted into carbonamide groups and 0 mol-% to 20 mol-% of the nitrile groups are unchanged, and the said cross-linked polymers possess a swelling capacity of 700 g/g in water and of up to 60 g/g in physiological saline and a gel strength of from 20 g to 100 g, their preparation and their use.

Superabsorbent polymers from cross-linked polyacrylonitrile emulsions

New spray powder formulations are described which, after application in the form of a thin layer to substrate surfaces with the aid of processes basset on electrostatic attraction and storing of this layer by heat or high-energy radiation, allow the deposition of firmly adhering layers of metal by currentless, wet-chemical metallization. The essential constituents of such a formulation are a pulverulent, non-conductive material and (semi-) noble metal compounds.

Powder mixtures for metallization of substrate surfaces

Copolymers containing incorporated radicals of long-chain alcohols and neutralized carboxyl groups are suitable as retanning agents for leather. They result in an excellent combination of water repellency, softness and grain tightness.

Softening and waterproofing retanning agents

The present invention relates to aqueous emulsions of polymers which contain 80 to 100 weight % of acrylonitrile polymerized within them, to a method for their preparation, and to their use as raw materials for acrylic and modacrylic fibres and as dyeing additives for adjusting the dyestuff affinity of cationic dyestuffs for conventional acrylic and modacrylic polymers and fibre materials produced from them.

Highly-concentrated aqueous polyacrylonitrile emulsions and a method for

Emulsion polymers obtainable by emulsifying a mixture consisting of

Emulsion polymers

Emulsion polymers which are prepared by free-radical polymerisation of monomers in the presence of

Paper size

Polymer-bound dyes, process for their production and use

Polymers obtainable by subjecting at least one monomer, polymerizable by free radicals, to a free-radical emulsion polymerization in the presence of a polymer of the formulae I and/or II ##STR1## in which M, n, R, R.sup.1, R.sup.2, x and y have the meanings mentioned in the description, the use of the polymers obtained for surface-sizing of paper or paper-like materials and also novel polymers of the formulae I and/or II.

Polymers of diisobutylene-sulfonate alkane maleic acid derivatives

Polymers from ethylenic monomers

Tub sizes for paper, containing aqueous or aqueous-alcoholic alkali metal, amine or ammonium salt solutions of copolymers of maleic anhydride and diisobutylene and, if appropriate, a vinyl monomer of the formula ##STR1## in which R designates H, --CH.sub.3, --C.sub.2 H.sub.5, --OR.sub.2, --OCOCH.sub.3, ##STR2## --CH.sub.2 OH or --CH.sub.2 --O--COCH.sub.3, R.sub.1 designates H or --CH.sub.3 and

Tub sizes for paper

The new copolymers based on maleic anhydride and .alpha.,.beta.-unsaturated compounds contain, as bivalent structural units,

Copolymers based on maleic anhydride and .alpha., .beta.-unsaturated

Surface sizing agents for paper containing aqueous or aqueous-alcoholic alkali metal, amine or ammonium salt solutions of copolymers of maleic anhydride and diisobutylene and, if appropriate, a vinyl monomer of the formula ##STR1## in which R designates H, --CH.sub.3, --C.sub.2 H.sub.5, --OR.sub.2, --OCOCH.sub.3, ##STR2## or --CH.sub.2 --O--COCH.sub.3, R.sub.1 designates H or --CH.sub.3 and

Surface sizing agents for paper

The dyeing of cellulose fibres or fibre blends containing cellulose fibres with reactive dyes by a cold pad-batch or pad-steam process is effected with aqueous padding liquors which contain water-soluble reaction products of copolymers of maleic anhydride and ethylene, propylene, isobutylene, diisobutylene or styrene with ammonia or amines of the formula ##STR1## in which R.sup.1 and R.sup.2 stand for hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -hydroxyalkyl.

Process for dyeing cellulose-containing fibre materials by the cold

Growing community of inventors

Leverkusen, Germany

Gunter Sackmann