Basf Aktiengesellschaft

Kemira Oyj

Solenis Technologies, L.p.

Basfaktiengesellschaft

Basf Se Corporation

Hubertus Kroener

Wolfgang Gaschler

Thomas Wirth

Lambertus Manders

Volker Schaedler

Eckehardt Wistuba

Eberhard Schupp

Oral Aydin

Alois Kindler

Juergen Schmidt-Thuemmes

Uwe Dittrich

Klaus Schnell

Holger Kern

Philipp Kloke

Elmar Schwarzenbach

Alexander Zettl

Paul Achatz

Mari Granstroem

The present invention relates to a process for the production of microfibrillated cellulose composition, wherein the microfibrillated cellulose has an average fiber length in the range from 500 to 1300 &#x3bc;m and a percentage of fiber length in the category &#x2264;200 &#x3bc;m of at least 15%, obtained by subjecting an aqueous mixture comprising 30 to 70% by weight of cellulose containing fibers to mechanical shearing at a temperature in the range of from &#x2265;40&#xb0; C. to &#x2264;120&#xb0; C. in the presence of at least one thermostable biocide, to the microfibrillated cellulose composition obtained in this process and their use in a process for production of paper, card and board comprising draining a paper stock comprising the microfibrillated cellulose composition with sheet formation in the wire.

Process for the production of a microfibrillated cellulose composition

AKD cellulosic composition obtainable by flowing a stream of a cellulosic suspension through a shearing device and in which a molten alkyl ketene dimer (AKD) is metered in to the stream of cellulosic suspension in or prior to the shearing device. The AKD cellulosic composition is particularly suitable in the manufacture of sized paper and paperboard.

AKD composition and manufacture of paper and paperboard

A paper coating slip comprising at least one inorganic pigment and, based on 100 parts by weight of the inorganic pigments, less than 40 parts by weight of organic polymers, and less than 25 parts by weight of water or other solvents having a boiling point below 150&#xb0; C. at 1 bar.

Paper coating slip based on pigment-polymer hybrids

A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M comprising styrene, butadiene, and if desired up to 30% by weight, based on 100% by weight of monomers, of ethylenically unsaturated comonomers other than styrene and butadiene; in a polymerization vessel by a monomer feed technique in the presence of a regulator system containing, based on 100% by weight of monomers, from 0.02 to 0.5% by weight of at least one hydrocarbon HC having from 6 to 20 carbon atoms, selected from compounds which on abstraction of a hydrogen atom form a pentadienyl radical or 1-phenylallyl radical, and &#x3b1;-methylstyrene dimer, and from 0.3 to 2% by weight of an organic compound S containing at least one SH group wherein at least 30%, preferably at least 50%, in particular at least 80%, and with particular preference the entirety (or &#x3e;95%) of hydrocarbon HC is included in the initial charge to the polymerization vessel.

Method for producing aqueous styrene-butadiene-iv polymer dispersions

A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M containing from 40 to 80% by weight of styrene as monomer M1, from 20 to 60% by weight of butadiene as monomer M2, and from 0 to 40% by weight, based on 100% by weight of monomers, of ethylenically unsaturated comonomers M3 other than styrene and butadiene by a monomer feed technique in the presence of from 0.05 to 0.5% by weight, based on 100% by weight of monomers, of at least one hydrocarbon HC selected from compounds having 6 to 20 carbon atoms which on abstraction of a hydrogen atom form a pentadienyl radical or a 1-phenylallyl radical and from &#x3b1;-methylstyrene dimer comprises supplying the monomers to be polymerized to the polymerization reaction over the course of 3 hours.

Method for producing aqueous styrene-butadiene polymer dispersions

A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M containing from 40 to 80% by weight of styrene as monomer M1, from 20 to 60% by weight of butadiene as monomer M2, and from 0 to 40% by weight, based on 100% by weight of monomers, of ethylenically unsaturated comonomers M3 other than styrene and butadiene by a monomer feed technique in the presence of from 0.05 to 0.5% by weight, based on 100% by weight of monomers, of at least one hydrocarbon HC having 6 to 20 carbon atoms, which is selected from compounds which on abstraction of a hydrogen atom form a pentadienyl radical or a 1-phenylallyl radical and from &#x3b1;-methylstyrene dimer comprises including at least 30% of the hydrocarbon HC in the initial charge to the polymerization vessel and supplying the remainder of the hydrocarbon HC to the polymerization reaction in the course of that reaction.

Method for producing aqueous styrene-butadiene polymer dispersions III

A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M containing from 40 to 80% by weight of styrene as monomer M1, from 20 to 60% by weight of butadiene as monomer M2, and from 0 to 40% by weight, based on 100% by weight of monomers, of ethylenically unsaturated comonomers M3 other than styrene and butadiene by a monomer feed technique in the presence of from 0.05 to 0.5% by weight, based on 100% by weight of monomers, of at least one hydrocarbon HC having 6 to 20 carbon atoms selected from compounds which on abstraction of a hydrogen atom form a pentadienyl radical or a 1-phenylallyl radical and &#x3b1;-methylstyrene dimer comprises raising, at a point in time when at least 70% of the monomers to be polymerized have been supplied to the polymerization reaction, the concentration of butadiene in the monomer feed for a period of at least 1% of the total feed time by at least 10% by weight, based on monomers in the feed.

Method for producing aqueous styrene-butadiene polymer dispersions II

Adhesives containing polyvinyl ether copolymers having a weight average molecular weight of &gt;10,000, comprise

Adhesives based on polyvinyl ether copolymers

An aqueous dispersion or solution of a polymer obtained by free radical polymerization and comprising from 0.01 to 10% by weight of carboxyl groups --CO.sub.2 H or sulfo groups --SO.sub.3 H contains, as a crosslinking agent, a compound having at least two vinyl ether groups.

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Neustadt, Germany

Hubertus Kroener