摘要:
Hydrophobicizing additives are water-redispersible powders or aqueous dispersions containing: a) water-insoluble, film-forming base polymer(s) based on homopolymers or copolymers of one or more vinyl esters of optionally branched C1-15 alkylcarboxylic, (meth)acrylic esters of C1-15 alcohols, vinylaromatics, olefins, dienes and vinyl halides, b) one or more hydrophobic organosilicon compounds, fatty acids, or derivatives thereof, or hydrocarbon waxes, and c) one or more protective colloids, wherein the proportion of the component b) based on the total weight of the component a) is more than 30% by weight.
摘要:
Water-redispersible polymer powder compositions based on homopolymers or copolymers of one or more monomers from the group consisting of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides, one or more protective colloids, if desired antiblocking agents, contain one or more compounds from the group of pozzolanas. The pozzolanic compounds preferably take the place of anti-blocking agents conventionally used.
摘要:
A process for producing dispersible powders by spray-drying aqueous polymer dispersions and adding antiblocking agent, wherein antiblocking agents present in agglomerated form and having a particle size from 10 μm to 250 μm, or having a particle size from 5 mm to 5 cm in the case of agglomerates in the form of extrudates, are fed in whole or in part by a transport gas into the spray-drying device and are comminuted to a particle size from 0.01 μm to 5 μm, or, in the case of extrudates, to a particle size from 2 μm to 60 μm.
摘要:
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.
摘要:
The invention relates to water-redispersible polymer powder compositions obtainable by means of free-radical-initiated polymerization in aqueous medium of one or more monomers from the group consisting of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides and subsequent drying of the polymer dispersion obtained, characterized in that one or more silanes of the general formula (RO)3-nR1nSiR2X (1) are added before or during the polymerization or before drying of the polymer dispersion, and also their use in tile adhesives.
摘要翻译:本发明涉及通过在含水介质中的自由基引发聚合获得的一种或多种单体的水可再分散聚合物粉末组合物,所述单体来自具有1至15个碳原子的无支链或支链烷基羧酸的乙烯基酯,甲基丙烯酸 具有1至15个碳原子的醇的酯和丙烯酸酯,乙烯基芳烃,烯烃,二烯和乙烯基卤化物,随后干燥得到的聚合物分散体,其特征在于一种或多种通式为(RO) 在聚合之前或期间或在干燥聚合物分散体之前加入N 1 R 2 S 2(X) 以及它们在瓦片粘合剂中的用途。
摘要:
Water-redispersible polymer powder compositions based on homopolymers or copolymers of one or more monomers from the group consisting of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides, one or more protective colloids, if desired antiblocking agents, contain one or more compounds from the group of pozzolanas. The pozzolanic compounds preferably take the place of anti-blocking agents conventionally used.
摘要:
Hydrophobicizing additives are water-redispersible powders or aqueous dispersions containing: a) water-insoluble, film-forming base polymer(s) based on homopolymers or copolymers of one or more vinyl esters of optionally branched C1-15 alkylcarboxylic, (meth)acrylic esters of C1-15 alcohols, vinylaromatics, olefins, dienes and vinyl halides, b) one or more hydrophobic organosilicon compounds, fatty acids, or derivatives thereof, or hydrocarbon waxes, and c) one or more protective colloids, wherein the proportion of the component b) based on the total weight of the component a) is more than 30% by weight.
摘要:
A process for producing dispersion powders by spray drying of aqueous polymer dispersions and addition of antiblocking agents in a rotary atomization dryer, wherein the antiblocking agent is conveyed by delivery air, wholly or partly, into an annular gap which is formed by a moulding arranged concentrically around the housing of the rotary atomizer, and which ends at a distance above the upper edge of the atomizer plate of the rotary atomizer.
摘要:
Water-redispersible polymer powder compositions are obtained by means of free-radical-initiated polymerization in aqueous medium of one or more monomers of vinyl esters of unbranched or branched alkylcarboxylic acids having from 1 to 15 carbon atoms, methacrylic esters and acrylic esters of alcohols having from 1 to 15 carbon atoms, vinylaromatics, olefins, dienes and vinyl halides and subsequent drying of the polymer dispersion, wherein one or more silanes of the general formula (RO)3−nR1nSiR2X (1) where X is an amino- or epoxy-containing radical are added before drying of the polymer dispersion. The powders are especially useful in tile adhesives for tiles having low water absorbtion capacity.
摘要:
A process for producing dispersion powders by means of spray drying of aqueous polymer dispersions and addition of antiblocking agents in a rotary atomization dryer, wherein the antiblocking agent is conveyed by means of delivery air, wholly or partly, into an annular gap which is formed by a moulding arranged concentrically around the housing of the rotary atomizer, and which ends at a distance above the upper edge of the atomizer plate of the rotary atomizer.