Patent application number | Description | Published |
20080269390 | Dispersion Powders Containing Fatty Acid Anhydrides - The invention relates to water-redispersible polymer powder compositions containing from 0.1 to 70% by weight of one or more fatty acid anhydrides, based on the total weight of the polymer powder composition, and the use of these powders in hydraulically setting systems. | 10-30-2008 |
20080281017 | Use of Biocide-Containing, Water-Redispersible Polymer Powder Compositions in Mineral Construction Materials - Mineral construction materials such as mortars and tile adhesives are rendered more resistant to microbial growth by adding biocide in the form of a biocide-containing redispersible polymer powder rather than adding biocide separately. | 11-13-2008 |
20090030168 | PROCESS FOR PRODUCING CATIONICALLY STABILIZED AND WATER-REDISPERSIBLE POLYMER POWDER COMPOSITIONS - Redispersible polymer powders which are cationically stabilized by spray drying a polymer dispersion with a cationic polymer can be used in higher concentrations in chemical building construction materials without introducing adverse properties. | 01-29-2009 |
20100041796 | Use Of Vinyl Chloride-Ethylene Copolymers For Hydrophobing Construction Substances - Copolymers of ethylene and vinyl chloride also containing a protective colloid, optionally in conjunction with a fatty acid compound or precursor thereof or with an organosilicon compound, can be employed to increase the water repellency of hydraulically settable construction materials. | 02-18-2010 |
20110112218 | METHOD FOR THE PRODUCTION OF PROTECTIVE COLLOID-STABILIZED POLYMER PRODUCTS AND DEVICE FOR CARRYING OUT THE METHOD - The invention relates to a method for the production of protective colloid-stabilized polymer products by means of emulsion polymerization in a reactor having an external cooling circuit, which is equipped with a pump and a heat exchanger, characterized in that the reaction mixture present in the reactor is delivered to a cooled static mixer-heat exchanger having stationary fixtures and is subsequently returned to the reactor. The invention further relates to a device for the production of protective colloid-stabilized polymer products by means of emulsion polymerization, comprising a reactor and an external cooling circuit, characterized in that the external cooling circuit is equipped with a pump and a cooled static mixer-heat exchanger having stationary fixtures. | 05-12-2011 |
20120316287 | Semi-Continuous Method for Emulsion Polymerisation - A method for producing aqueous polymer dispersions by means of radically initiated emulsion polymerisation, in an aqueous medium, of vinyl ester and ethylene, in series-connected polymerisation reactors, wherein in a first discontinuous polymerisation phase at least some of the reactants are introduced into the first polymerisation reactor and the remainder is added in a metered fashion. The reactor is filled up to more than 90% by volume, and at least 90 wt % of the monomers are reacted; in a second continuous polymerisation phase, the reactants are continuously supplied to the first polymerisation reactor and product is continuously withdrawn, and the product is continuously transferred into a second polymerisation reactor, and in the second polymerisation reactor the polymerisation is continued until at least 98 wt % of the monomers used have reacted. | 12-13-2012 |
20130102702 | Process for Continuous Emulsion Polymerization - A process for aqueous, free-radically initiated, continuous emulsion polymerization of A) at least one vinyl ester and optionally at least one (meth)acrylic ester, B) ethylene, and C) 0 to 10% by weight of one or more ethylenically unsaturated, functionalized comonomers, in the presence of 3.0 to 12.5% by weight of one or more emulsifiers, where at least 50% by weight are nonionic emulsifiers, and 0 to 10% by weight of one or more protective colloids, in a stirred tank cascade with at least two pressure reactors connected in series and with at least one low-pressure reactor connected downstream. | 04-25-2013 |
20130260162 | Paper coating slips comprising a combination of styrene-butadiene copolymer and/or styrene-acrylic ester copolymer and vinyl acetate-ethylene copolymer - The invention provides paper coating slips comprising, as a binder, an aqueous dispersion of a styrene-butadiene copolymer or of a styrene-acrylic ester copolymer, or a mixture of these aqueous dispersions, characterized in that an aqueous dispersion of a polyvinyl alcohol-stabilized vinyl acetate-ethylene copolymer is additionally present in each case. | 10-03-2013 |
20140251139 | METHOD FOR PROCESSING WASTEWATER AND EXHAUST GAS CONDENSATES FROM THE POLYMERIZATION OF VINYL ACETATE AND ETHYLENE IN AN AQUEOUS MEDIUM - A method for processing wastewater and exhaust gas condensates from the polymerization of vinyl acetate and ethylene and optionally other comonomers in an aqueous medium by suspension or emulsion polymerization employs relieving pressure after completion of the polymerization of the polymerization batch and discharging the polymer dispersion. During the relieving, the gaseous phase is removed by means of a compressor. Optionally, the gaseous phase occurring during stripping is removed by the compressor and cooled by one or more heat exchangers before entry into the compressor. The liquid phases occurring in the compressor and optionally in the heat exchanger are separated from the gaseous phase and the liquid phases are given to a rectification column, and separated into a vinyl acetate monomer phase and a wastewater phase, and the vinyl acetate monomer phase is resupplied to polymerization. | 09-11-2014 |
20150057405 | METHOD FOR PRODUCING VINYL ESTER POLYMERS HAVING SPECIFICALLY SETTABLE DISPERSITY AND LOW POLYDISPERSITY - Methods for producing protective-colloid-stabilized aqueous dispersions of vinyl ester, polymers having weight-average particle diameters Dw of 120 nm to 1,500 nm and a polydispersity PD<1.6 include radically initiated emulsion polymerizations of one or more vinyl esters and optionally one or more additional ethylenically unsaturated monomers in aqueous medium in the presence of one or more protective colloids, wherein an aqueous mixture containing 0 to 90 grams of one more protective colloids per liter of water is provided to the receiver (concentration (C)), and starting with or after the start of the metered addition of one or more initiators, one or more protective colloids and the total amount of vinyl esters used are added in a metered manner, the emulsion polymerizations being performed in the absence of vinyl halogenides. | 02-26-2015 |