Abstract: The present invention concerns a process for continuously coating a cellulose-based fibrous substrate web with fatty acid chloride, comprising the steps of a) pre-drying a cellulose-based fibrous substrate web to an EN ISO 638:2008 dry matter content of less than 10%; b) coating the cellulose-based fibrous substrate web pre-dried in step a) with a liquid fatty acid chloride composition at a DIN EN 20187 relative humidity of less than 20 rH and a temperature below the boiling temperature of the liquid fatty acid chloride composition; c) thermally treating the coated cellulose-based fibrous substrate web obtained from step b).

Abstract: The present invention relates to single face or double faced corrugated fiberboard comprising one or more corrugated plies, wherein at least one of the linerboard plies or corrugated plies is a paper-film assembly comprising: i) a 30 to 600 g/m2 grammage papery material of construction, ii) a biodegradable polymeric coating from 1 to 100 ?m in thickness. More particularly, the present invention relates to single face or double faced and/or corrugated fiberboard comprising one or more corrugated plies, wherein at least one of the linerboard plies or corrugated plies is a paper-film assembly comprising: i) a 30 to 600 g/m2 grammage papery material of construction as outer layer, ii) a biodegradable polymeric coating from 1 to 100 ?m in thickness as interlayer, and iii) a 30 to 600 g/m2 grammage papery material of construction as inner layer. The present invention further relates to methods of producing this corrugated fiberboard.

Abstract: The present invention relates to single face or double faced corrugated fiberboard comprising one or more corrugated plies, wherein at least one of the linerboard plies or corrugated plies is a paper-film assembly comprising: i) a 30 to 600 g/m2 grammage papery material of construction, ii) a biodegradable polymeric coating from 1 to 100 ?m in thickness. More particularly, the present invention relates to single face or double faced and/or corrugated fiberboard comprising one or more corrugated plies, wherein at least one of the linerboard plies or corrugated plies is a paper-film assembly comprising: i) a 30 to 600 g/m2 grammage papery material of construction as outer layer, ii) a biodegradable polymeric coating from 1 to 100 ?m in thickness as interlayer, and iii) a 30 to 600 g/m2 grammage papery material of construction as inner layer. The present invention further relates to methods of producing this corrugated fiberboard.

Abstract: Described is the use of synthetic adhesives in the manufacture of corrugated fiberboard at relatively low temperatures and high lineal speeds. The corrugated fiberboard includes a corrugated sheet of paper and a flat linerboard and the corrugation of the corrugated sheet of paper is produced at paper temperatures below 95° C. and at a lineal speed above 150 m/min. The production of the corrugation of a corrugated sheet of paper is immediately followed by a continuous operation in which a preferably unheated corrugated board adhesive is applied and the corrugated sheet of paper is adhered to at least one first linerboard. The corrugated board adhesive used is an aqueous adhesive dispersion based on at least one synthetic, dispersed polymer having preferably more than 40% by weight solids content, selected from acrylate copolymers, copolymers of vinylaromatics and conjugated aliphatic dienes and vinyl acetate-alkylene copolymers, wherein the glass transition temperatures of the polymers are above 20° C.

Abstract: Processes for producing aqueous dispersions of aliphatic polycarbonates are described herein. A solution of the aliphatic polycarbonate in at least one aprotic, organic solvent comprising at least 50% by volume ethyl acetate based on the total amount of the organic solvent is provided. The aliphatic polycarbonate solution is emulsified in an aqueous emulsification medium in the presence of at least one surface-active substance to produce an aqueous emulsion of the aliphatic polycarbonate solution. The apriotic, organic solvent is removed from the emulsion by vaporization.

Abstract: The present invention relates to single face or double faced corrugated fiberboard comprising one or more corrugated plies, wherein at least one of the linerboard plies or corrugated plies is a paper-film assembly comprising: i) a 30 to 600 g/m2 grammage papery material of construction, ii) a biodegradable polymeric coating from 1 to 100 ?m in thickness. More particularly, the present invention relates to single face or double faced and/or corrugated fiberboard comprising one or more corrugated plies, wherein at least one of the linerboard plies or corrugated plies is a paper-film assembly comprising: i) a 30 to 600 g/m2 grammage papery material of construction as outer layer, ii) a biodegradable polymeric coating from 1 to 100 ?m in thickness as interlayer, and iii) a 30 to 600 g/m2 grammage papery material of construction as inner layer. The present invention further relates to methods of producing this corrugated fiberboard.

Abstract: Described is the use of synthetic adhesives in the manufacture of corrugated fiberboard at relatively low temperatures and high lineal speeds. The corrugated fiberboard includes a corrugated sheet of paper and a flat linerboard and the corrugation of the corrugated sheet of paper is produced at paper temperatures below 95° C. and at a lineal speed above 150 m/min. The production of the corrugation of a corrugated sheet of paper is immediately followed by a continuous operation in which a preferably unheated corrugated board adhesive is applied and the corrugated sheet of paper is adhered to at least one first linerboard. The corrugated board adhesive used is an aqueous adhesive dispersion based on at least one synthetic, dispersed polymer having preferably more than 40% by weight solids content, selected from acrylate copolymers, copolymers of vinylaromatics and conjugated aliphatic dienes and vinyl acetate-alkylene copolymers, wherein the glass transition temperatures of the polymers are above 20° C.

Abstract: The invention relates to a method for monitoring exothermic reactions in a reactor, in which one or more starting materials react exothermically to give at least one product, and at least one gas is present in the reactor during operation as intended or during a runaway, comprising the following process: A) measurement and storage of an initial temperature and an initial pressure in the reactor, B) calculation of the amount of products and starting materials present in the reactor from an energy balance, C) calculation of a maximum pressure raise that occurs on stepwise reaction of the amount of starting materials present, and D) calculation of a runaway pressure from the maximum pressure raise that occurs, calculated in step C), and the measured initial pressure stored in step A).

Abstract: 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° C. at 1 bar.

Abstract: A method for the treatment of paper surfaces is described.

Abstract: The invention relates to an apparatus for transporting polymer dispersions, said apparatus being capable of being driven by a drive and being designed as an impeller (28). It is possible for said impeller both to be surrounded by a housing and to protrude freely into the polymer dispersion contained in the reactor tank. A number of vanes (2) are mounted in the region of the hub (1) of the impeller (28) in such a way that pumping spaces (5, 25) on the front side (7) and rear side (8) of the impeller (28) are flowed through uniformly.

Abstract: The invention relates to a method for monitoring exothermic reactions in a reactor, in which one or more starting materials react exothermically to give at least one product, and at least one gas is present in the reactor during operation as intended or during a runaway, comprising the following process: A) measurement and storage of an initial temperature and an initial pressure in the reactor, B) calculation of the amount of products and starting materials present in the reactor from an energy balance, C) calculation of a maximum pressure raise that occurs on stepwise reaction of the amount of starting materials present, and D) calculation of a runaway pressure from the maximum pressure raise that occurs, calculated in step C), and the measured initial pressure stored in step A).

Abstract: The invention relates to alkylglycol alkoxylates and alkyldiglycol alkoxylates that are obtainable by alkoxylating C4-8 alkylglycols or diglycols with C2-5 alkoxides up to an average alkoxylation degree of 1 to 8, based on the C4-8alkylglycols or diglycols. The invention further relates to mixtures from C2-5 alkoxylates of C4-8 alkylgycols or -diglycols that have an average alkoxylation degree of 1 to 8 and tensides that have an interfacial tension of less than 45 mN/m at 20° C. when dissolved in an amount of 5 g/l of water, and/or to diyhdroxyalkins or derivatives thereof.

Abstract: 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 &agr;-methylstyrene dimer comprises supplying the monomers to be polymerized to the polymerization reaction over the course of 3 hours.

Abstract: 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 &agr;-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 >95%) of hydrocarbon HC is included in the initial charge to the polymerization vessel.

Abstract: 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 &agr;-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.

Abstract: 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 &agr;-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.

Abstract: A method of on-line monitoring and control of monomer conversion in emulsion polymerization includes continuously balancing, as from an initialization time, the heat QIN, introduced into the reactor, the reaction enthalpy QRE introduced via the monomer feed, and the heat which has been removed from the reactor QOUT, and calculating an amount of heat which has not been removed QAD which would lead to an increase in the internal temperature and the internal pressure of the reactor in the event of a spontaneous adiabatic reaction. A check is carried out as to whether the potential adiabatic temperatures and pressures always lie below prescribed upper limits. If the upper limits are exceeded, the monomer feed to the reactor is throttled back or interrupted.

Abstract: A process for preparing an aqueous polymer dispersion by free-radically initiated polymerization of free-radically polymerizable compounds I with moderate solubility in water, whose disperse polymer particles contain not only compounds I but also compounds II with a very low solubility in water where a mixture consisting of a portion of the compounds I and consisting of the compounds II is used to produce an aqueous emulsion I with a droplet size .ltoreq.500 nm, and at least a portion of the aqueous emulsion I is supplied continuously to the polymerization vessel as a feed stream I, in the course of continuing free-radical polymerization, during which the continuous feed stream I is accompanied, at least some of the time, by a feed stream II consisting of another portion of the compounds I or of the aqueous emulsion II thereof with a droplet size .gtoreq.1000 nm.

Abstract: A process for preparing an aqueous polymer dispersion by free-radical polymerization of compounds I and II whose individual solubility in water is very different by the miniemulsion polymerization technique, in which process the reaction mixture is agitated by an external circuit which leads from and back again to the reaction vessel and comprises at least one low-shear pump and at least one heat exchanger having an essentially laminar flow profile. The copolymers prepared in accordance with the invention can be produced in a good yield within short times and exhibit good performance properties.