Basf Aktiengesellschaft

Styrolution Gmbh

Ferdinand Straub

Heinrich Hartmann

Axel Sanner

Herbert Spoor

Siegfried Lang

Paul Naegele

Friedrich Vogel

Karl Seib

Hans-Juergen Raubenheimer

Claus Cordes

Hans-Uwe Schenck

Hans-Helmut Goertz

Walter Denzinger

Ulrich Müller

Oral Aydin

Wolfgang Schwarz

Peter Fickeisen

Rolf Henn

Franz Frosch

Adolf Nuber

Eckhard Roske

Gerd Schroeder

Wolfgang Linke

Egon Brode

Jürgen Dosch

Albrecht Kolb

Processes suitable for purifying aromatic-containing feed streams, and processes using such purified streams are described, wherein the purification processes comprise: (a) providing a process feedstream comprising an aromatic component; and (b) bringing the process feedstream into contact with a first zeolite and a second zeolite; wherein the first zeolite has a mean pore size of 0.3 to 0.5 nm, and wherein the second zeolite has a mean pore size of 0.6 to 0.8 nm.

Method for purifying supply flows containing aromates by means of zeolites

Copolymers of monoalkyl maleates and vinyl alkyl ethers are prepared by free radical copolymerization of maleic anhydride and a vinyl alkyl ether followed by reaction with an alkanol, by a process in which the vinyl alkyl ether component is present in excess in the reaction mixture in each phase of the polymerization, the free radical copolymerization is carried out in acetone and the acetone is removed by distillation during or after ester formation at up to 70.degree. C.

Preparation of copolymers of monoalkyl maleates and vinyl alkyl ethers

3-Methyl-1-vinylimidazolium chlorides are prepared by quaternizing N-vinylimidazoles in aqueous solution with methyl chloride and are used for the preparation of water-soluble homo- or copolymers.

Preparation of 3-methyl-1-vinylimidazolium chlorides

A terpolymer of vinylpyrolidone, tert-butyl (meth)acrylate and acrylic or methacrylic acid, its use in hair treatment agents, and hair cosmetics compositions which contain these agents.

Terpolymers, their use in hair treatment agents and hair treatment

Water-soluble terpolymers which contain, as copolymerized units,

Water-soluble terpolymers and their preparation

Readily water-soluble, slightly hygroscopic terpolymers which consist of

Water-soluble polymers having a low hygroscopicity

A process for the preparation of high-viscosity polyvinylpyrrolidone, wherein an aqueous polyvinylpyrrolidone solution is subjected to a heat treatment in the presence of a water-insoluble peroxide and in the absence of oxygen, and thickeners containing the polyvinylpyrrolidone thus prepared.

Preparation of a polyvinylpyrrolidone by heat treatment of an aqueous

Polymers which due to their physiological compatibility may be used in plasma substitutes and which essentially contain vinylpyrrolidone and .alpha.,.omega.-diisocyanato-alkanecarboxylic acid esters as structural units, their preparation, and plasma substitutes containing such polymers.

Vinylpyrrolidone polymers, their preparation, their use in the

A process for the preparation of polyvinylpyrrolidone-iodine, wherein a polyvinylpyrrolidone which has been subjected to hydrogenation is reacted with iodine in a conventional manner. The novel process is particularly suitable for use with low molecular weight polyvinylpyrrolidone, having a K value of from 10 to 20.

Preparation of polyvinylpyrrolidone-iodine

A process for the preparation of modified poly-N-vinylpyrrolid-2-one containing two identical reactive groups, wherein polyvinylpyrrolidone is treated with complex hydrides, with or without further reaction of the modified polyvinylpyrrolidone with a reactive bifunctional compound, to give a polymer which has a molecular weight at least 2.5 times as great as that of the starting polymer.

Preparation of modified polymers of N-vinylpyrrolid-2-one and their use

High molecular weight products based on N-vinylpyrrolidone, in which blocks of vinylpyrrolidone polymers or vinylpyrrolidone copolymers are linked by connecting units carrying ester, amide, urethane or urea groups, as a result of which these high molecular weight products are biodegradable and may be used as plasma substitutes, and the plasma substitutes thus obtained.

Biodegradable vinylpyrrolidone polymers, their manufacture and use

A process for reducing the residual monomer content of a copolymer prepared by copolymerizing vinyl esters and N-vinyl-lactams in a solvent in the presence of a free radical polymerization initiator. Following the main polymerization, from 0.05 to 0.5% by weight, based on the monomers employed, of di-tert.-butyl peroxide, di-tert.-amyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-bis-(tert.-butylperoxy)-hexane, 2,2-bis-(tert.-butylperoxy)-butane, 1,1-bis-(tert.-butylperoxy)-3,3,5-trimethylcyclohexane, 4,4-di-(tert.-butylperoxy)-butyl valerate, or a mixture of these, is added to the reaction mixture and the after-polymerization is carried out at a higher temperature than the main polymerization.

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Hockenheim, Germany

Ferdinand Straub