Rohm Gmbh

Klaus Huebner

Hans Ottofrickenstein

Herbert Fink

Norbert Suetterlin

Wilhelm Elser

Werner Siol

Horst Dinklage

Gerhard Markert

Michael Wicke

Theodor Mager

Hanns Boessler

Helmut Moroff

Helmut Neumann

Hans Boessler

What is disclosed is a method for thickening aqueous systems in the acid range at a pH below 7 by the addition of an aqueous dispersion of a synthetic polymer having a molecular weight of at least 500,000, and which is water soluble or at least colloidally dispersible at a pH below 7, said polymer comprising (A) 5-100 percent by weight of at least one monomer having at least one basic nitrogen atom (B) 0-95 percent by weight of at least one monomer which has at most limited solubility in water, and (C) 0-30 percent by weight of at least one further non-basic, water soluble comonomer.

Method for thickening aqueous systems

A two-step emulsion polymerization method for making an aqueous emulsion of core/shell polymer particles recoverable as a polymer powder by spray drying the emulsion, said polymer being capable of swelling and forming a gel in gasoline, and paints and coating compositions containing gasoline and such a polymer powder as a thickening agent or binder.

Thickeners and binders forming gels in gasoline

What are disclosed are aqueous dispersions of a self-crosslinking synthetic resin, said dispersions consisting of an aqueous phase containing from 0.2 to 5 weight percent of urea and, dispersed therein, resin particles formed of a vinyl polymer comprising (a) from 52.1 to 97.9 weight percent of acrylate or methacrylate esters, vinyl esters, or styrene; (b) from 0.1 to 10 weight percent of N-methylol acrylamide or methacrylamide; (c) from 2 to 10 weight percent of an hydroxyalkyl ester of an unsaturated carboxylic acid; and (d) 0 to 27.9 weight percent of other monomers, which dispersions, on drying and condensation to form films, liberate much less formaldehyde than comparable dispersions without urea while retaining good solvent resistance.

Aqueous dispersion of a self-crosslinking resin

What is disclosed are aqueous dispersions of a hydrophilic copolymer prepared by polymerizing, in an aqueous medium, a monomer mixture comprising a member selected from the group consisting of lower alkyl acrylates and methacrylates, a compound of the formula ##STR1## wherein R is hydrogen or methyl, R.sup.1 is hydrogen or alkyl having 1 to 4 carbon atoms. Y is oxygen or --NR.sup.2 --, R.sup.2 is hydrogen or alkyl having 1 to 4 carbon atoms, and n is an integer from 1 to 25, up to 8 percent, by weight of the copolymer, of a member selected from the group consisting of copolymerizable carboxylic acids and salts of such acids, and at least one monomer capable of crosslinking said copolymer, as well as methods for making said dispersions and using them to impart a hydrophilic finish to fibers and fabrics.

Method of finishing fibers or fabrics with dispersions of hydrophilic

Aqueous dispersions of copolymers of (1) acrylic or methacrylic acid esters, (2) derivatives of acrylic acid or methacrylic acid having the general formula ##STR1## wherein Y is oxygen or a --NR'-- group where R' is hydrogen or alkyl having 1-4 carbon atoms, R is hydrogen or methyl, R' is hydrogen or alkyl having 1-4 carbon atoms, and n is an integer from 1 to 25, (3) one or more polymerizable carboxylic acids and/or the salts thereof, and (4) one or more monomers capable of crosslinking the polymer chains. These copolymers are highly water absorbent, and alkali-resistant, and applied as dispersions are well suited for providing a hydrophilic finish to textile fibers and to textiles and non-wovens.

Dispersions of hydrophilic acrylic resins

Non-blocking coatings are disclosed, which coatings comprise an acrylate ester emulsion polymer prepared by polymerization in the presence of a degraded starch which, in a 10 percent solution in 1 N NaOH, has a viscosity not greater than 15 mPa . s at a velocity gradient D=532.1 s.sup.-1.

Method of making aqueous emulsions of acrylate copolymers in the

Aqueous film-forming dispersions of a synthetic resin, said resin containing from 0.5 to 5 percent by weight of a heterocyclic comonomer of the formula ##STR1## wherein A--B is --C.dbd.C-- or --CH--CH--; R.sup.1 is hydrogen or lower alkyl; and R is an aliphatic group having a polymerizable carbon-carbon double bond therein; water-base paints comprising a pigment and filler dispersed in such an aqueous dispersion; and a method for overpainting substrates of oil-base paints or alkyl resin paints with such a water-base paint.

Film forming aqueous synthetic resin dispersions and paints prepared

Method for making highly resin-filled paper on a paper machine employing a fiber slurry having therein a non-ionic resin in an amount of at least 30 percent (dry resin weight based on dry fiber weight), said resin being combined with the fiber slurry as a dispersion comprising a cationic and a non-ionic dispersing agent.

Growing community of inventors

Ober-Ramstadt-Eiche, Germany

Klaus Huebner