Basf Aktiengesellschaft

Volkmar Weberndoerfer

Hans-Juergen Degen

Heinrich Hartmann

Michael Kroener

Andreas Stange

Sigberg Pfohl

Friedrich Linhart

Gerd Rehmer

Rudi Widder

Rudolf Bermes

Werner Auhorn

Ulrich Riebeling

Enrique Freudenberg

Helmut Schlecht

Manfred Daeuble

Manfred Eisert

Friedrich Brunnmueller

Hans G Schulze

Paper, board, and cardboard having high dry strength are made by adding to the paper stock a dry strength agent which is obtainable by mixing enzymatically digested starch having a viscosity of from 20 to 2,000 mPa.s (measured in 7.5% strength aqueous solution at 45.degree. C.) and a cationic polymer which contains, as typical copolymerized monomers,

Making paper, board and cardboard of high dry strength

Paper and paperboard of high dry strength are produced by adding a dry strength enhancer to the paper stock and dewatering the paper stock with sheet formation by using as the dry strength enhancer a mixture of a cationic polymer which contains as characteristic monomers copolymerized units of

Production of paper and paperboard of high dry strength

Paper having a high dry strength is made using water-soluble homopolymers of salts or quaternary 1-vinyl-2-imidazolines and copolymers of these salts or quaternary compounds with acrylamide and/or methacrylamide as agents for increasing the dry strength of paper.

Making paper which has a high dry strength

Engine sizes for paper are based on aqueous emulsions of C.sub.14 -C.sub.20 -alkyl diketenes and cationic copolymers of

Engine size for paper, based on fatty alkyl diketenes and cationic

A process for the preparation of dyes which contain sulfonic acid groups and have a low electrolyte content, wherein an aqueous solution or suspension, which may or may not contain inorganic salts, of the dye containing sulfonic acid groups is

Preparation of dyes which contain sulfonic acid groups and have a low

A process for dyeing textile materials, consisting of wool or nylon fibers, with anionic dyes in an aqueous liquor at up to 110.degree. C., wherein dyeing is commenced at a pH of from 7 to 9 and from 0.2 to 5 parts by weight, per 1,000 parts by weight of liquor, of an ester of a saturated C.sub.2 -C.sub.4 -carboxylic acid with an alcohol having a tertiary amino group in the 2-position are added at the dyeing temperature to act as a pH regulator.

Process for dyeing wool or nylon fibers

Alkanes substituted by chlorine atoms and/or sulfochloride groups are prepared by reacting alkanes with chlorine, with or without sulfur dioxide, in a particular throughput ratio, in a reaction chamber inclined to the horizontal, the starting materials being passed through the reaction chamber in co-current, from below. The substituted alkanes or paraffins obtainable by the process of the invention are pesticides, plasticizers, solvents and starting materials for the preparation of such products, as well as of fat liquors, detergents, lubricating oils, synthetic resins and slip agents.

Growing community of inventors

Mannheim, Germany

Volkmar Weberndoerfer