摘要:
The invention provides: for a process for preparing pulverulent polymers by drying aqueous polymer dispersions in the presence of copolymers based on ethylenically unsaturated C3-C6 carboxylic acids and their hydroxyalkyl esters as assistants; polymer powders obtainable by this process; aqueous polymer dispersions obtainable by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of the novel copolymers, and the powders obtainable therefrom, and a polymeric binder as well as and mineral building materials which comprise the novel polymer powders.
摘要:
Aqueous polymer dispersions contain, as a dispersant, a mixture of an ethylene oxide/propylene oxide copolymer, an ethoxylated alkylphenol and/or an ethoxylated fatty alcohol, an ethoxylated polysaccharide and, if required, as a further component, sulfuric acid half-esterified with an ethoxylated alkylphenol and/or an ethoxylated fatty alcohol.
摘要:
Naphthalenesulfonic acid-formaldehyde condensates are used as assistants in the drying of aqueous polymer dispersions. Also described is a process for preparing polymer powders by drying, using these condensates; the polymer powders obtainable by the process; and their use as binders.
摘要:
A process for preparing an addition-polymer powder suitable for modifying a binding mineral building material by drying an aqueous addition-polymer dispersion whose film has a glass transition temperature Tg≦30° C. and to which a drying assistant has been added comprises adding to the aqueous addition-polymer dispersion before drying only a drying assistant which will have a plasticizing or deplasticizing effect in the ready-to-use mix of the binding mineral building material with water and admixing the resulting dry addition-polymer powder with at least one assistant in the form of a finely divided solid which will have an opposite effect to the drying assistant added before drying.
摘要:
The invention provides for a process for preparing pulverulent polymers by drying aqueous polymer dispersions in the presence of copolymers based on ethylenically unsaturated C.sub.3 -C.sub.6 carboxylic acids and their hydroxyalkyl esters as assistants;polymer powders obtainable by this process;aqueous polymer dispersions obtainable by free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers in the presence of the novel copolymers, and the powders obtainable therefrom, anda polymeric binder as well as and mineral building materials which comprise the novel polymer powders.
摘要:
Phenolsulfonic acid-formaldehyde condensates are used as assistants in the drying of aqueous polymer dispersions.Also described are a process for preparing polymer powders by drying, using these condensates; the polymer powders obtainable by the process; and their use as binders.
摘要:
An adhesive comprising a polymer obtainable by free-radical addition polymerization of ethylenically unsaturated compounds (monomers) and synthesized from at least 60% by weight of principal monomers selected from C1 to C20 alkyl (meth)acrylates, vinyl esters of carboxylic acids containing up to 20 carbon atoms, vinylaromatics having up to 20 carbon atoms, ethylenically unsaturated nitrites, vinyl halides, vinyl ethers of alcohols containing 1 to 10 carbon atoms, aliphatic hydrocarbons having 2 to 4 carbon atoms and one or two double bonds, and mixtures of these monomers, and from more than 1% by weight of monomers containing at least two nonconjugated polymerizable vinyl groups.
摘要:
An emulsifier system comprising a) a salt of a sulfuric monoester of a C9-C15 alcohol or of an alkoxylated C9-C15 alcohol, and b) an alkoxylated C8-C16 alcohol, and the use of this emulsifier system for preparing aqueous polymer dispersions.
摘要:
Multilayer laminate comprising at least two pressure-sensitive adhesive layers and a carrier layer located between the pressure-sensitive adhesive layers and comprising a synthetic polymer.