摘要:
Polyvinyl-alcohol-stabilized redispersible powders which have plasticizing properties are obtained by drying polyvinyl-alcohol-stabilized aqueous dispersions of polymers of one or more monomers from the group of vinyl esters of optionally branched C1-18 alkylcarboxylic acids, (meth)acrylic esters of optionally branched C1-15 alcohols, dienes, olefins, vinylaromatics and vinylhalides, in the presence of a copolymer formed from a) one or more monomers from the group of ethylenically unsaturated monocarboxylic acids, ethylenically unsaturated dicarboxylic acids and their anhydrides, each having 4 to 8 carbon atoms, and salts thereof, b) one or more ethylenically unsaturated compounds containing sulfonic, sulfuric, and/or phosphonic acid groups, and salts thereof, and c) one or more monomers from the group consisting of vinyl esters of optionally branched C1-18 alkylcarboxylic acids and (meth)acrylic esters of optionally branched C1-15 alcohols.
摘要:
Polyvinyl-alcohol-stabilized redispersible powders which have plasticizing properties are obtained by drying polyvinyl-alcohol-stabilized aqueous dispersions of polymers of one or more monomers from the group of vinyl esters of optionally branched C1-18 alkylcarboxylic acids, (meth)acrylic esters of optionally branched C1-15 alcohols, dienes, olefins, vinylaromatics and vinylhalides, in the presence of a copolymer formed from a) one or more monomers from the group of ethylenically unsaturated monocarboxylic acids, ethylenically unsaturated dicarboxylic acids and their anhydrides, each having 4 to 8 carbon atoms, and salts thereof, b) one or more ethylenically unsaturated compounds containing sulfonic, sulfuric, and/or phosphonic acid groups, and salts thereof, and c) one or more monomers from the group consisting of vinyl esters of optionally branched C1-18 alkylcarboxylic acids and (meth)acrylic esters of optionally branched C1-15 alcohols.
摘要:
The present invention relates to the use of isoalkane mixtures for reducing or minimizing the dust emission during the handling of pulverulent construction chemistry products, a process for the preparation of the pulverulent construction chemistry products, and hydraulically setting materials comprising the isoalkane mixtures according to the invention.
摘要:
A multimetal oxide of the formula I Aga-bMbV2Ox*cH2O, I where M is a metal selected from the group consisting of Li, Na, K, Rb, Cs, Tl, Mg, Ca, Sr, Ba, Cu, Zn, Cd, Pb, Cr, Au, Al, Fe, Co, Ni and/or Mo, a is from 0.3 to 1.9 and b is from 0 to 0.5, with the proviso that the difference (a−b)≧0.1 and c is from 0 to 20 and x is a number determined by the valence and amount of elements different from oxygen in the formula I, which has a crystal structure giving an X-ray powder diffraction pattern which displays reflections at the lattice spacings d of 15.23±0.6, 12.16±0.4, 10.68±0.3, 3.41±0.04, 3.09±0.04, 3.02±0.04, 2.36±0.04 and 1.80±0.04 Å. Precatalysts and catalysts produced therefrom for the partial oxidation of aromatic hydrocarbons are also provided.
摘要:
A multimetal oxide of the formula I Aga−bMbV2Ox*c H2O, I where M is a metal selected from the group consisting of Li, Na, K, Rb, Cs, Tl, Mg, Ca, Sr, Ba, Cu, Zn, Cd, Pb, Cr, Au, Al, Fe, Co, Ni and/or Mo, a is from 0.3 to 1.9 and b is from 0 to 0.5, with the proviso that the difference (a−b)≧0.1 and c is from 0 to 20 and x is a number determined by the valence and amount of elements different from oxygen in the formula I, has a crystal structure giving an X-ray powder diffraction pattern which displays reflections at the lattice spacings d of 15.23±0.6, 12.16±0.4, 10.68±0.3, 3.41±0.04, 3.09±0.04, 3.02±0.04, 2.36±0.04 and 1.80±0.04 Å. Precatalysts and catalysts produced therefrom for the partial oxidation of aromatic hydrocarbons are also provided.
摘要:
Dry mortar formulations comprising a) from 0.5 to 80% by weight of hydraulic binder, b) from 0 to 97% by weight of fillers, c) from 0 to 3.5% by weight of thickeners, d) from 1.0 to 80% by weight of redispersible polymer powder, and e) from 0.0001 to 1.0% by weight of antioxidants exhibit improved tensile strength and other set mortar properties, particularly after storage of the dry mortar composition.
摘要:
A method of drying a polymer dispersion, wherein a C2-C6-mono- and/or dialdehyde condensate with sulfonated phenols, naphthalenes or sulfonated polynuclear aromatics, alone or mixtures thereof, is contacted with an aqueous polymer dispersion.
摘要:
A multimetal oxide of the formula I Aga−bMbV2Ox*c H2O, I where M is a metal selected from the group consisting of Li, Na, K, Rb, Cs, Tl, Mg, Ca, Sr, Ba, Cu, Zn, Cd, Pb, Cr, Au, Al, Fe, Co, Ni and/or Mo, a is from 0.3 to 1.9 and b is from 0 to 0.5, with the proviso that the difference (a−b)≧0.1 and c is from 0 to 20 and x is a number determined by the valence and amount of elements different from oxygen in the formula I, has a crystal structure giving an X-ray powder diffraction pattern which displays reflections at the lattice spacings d of 15.23±0.6, 12.16±0.4, 10.68±0.3, 3.41±0.04, 3.09±0.04, 3.02±0.04, 2.36±0.04 and 1.80±0.04 Å. Precatalysts and catalysts produced therefrom for the partial oxidation of aromatic hydrocarbons are also provided.
摘要:
A process for preparing indene derivatives of the general formula I ##STR1## where R.sup.1 is a C.sub.1 -C.sub.10 -alkyl radical, a phenyl radical or a C.sub.1 -C.sub.4 -alkyl-substituted phenyl radical andA is a bridge which, together with the adjacent carbons, forms a six-membered aromatic or a five- or six-membered heteroaromatic or carbocyclic ring onto which a further aromatic ring may be fused,comprises reacting II with III ##STR2## (X=chlorine, bromine, iodine) in the presence of a Friedel-Crafts catalyst to give IV ##STR3## which is then dehydrogenated to I.
摘要:
A multimetal oxide of the formula I Aga-bMbV2Ox*cH2O, I where M is a metal selected from the group consisting of Li, Na, K, Rb, Cs, Tl, Mg, Ca, Sr, Ba, Cu, Zn, Cd, Pb, Cr, Au, Al, Fe, Co, Ni and/or Mo, a is from 0.3 to 1.9 and b is from 0 to 0.5, with the proviso that the difference (a-b) and c is from 0 to 20 and x is a number determined by the valence and amount of elements different from oxygen in the formula I, which has a crystal structure giving an X-ray powder diffraction pattern which displays reflections at the lattice spacings d of 15.23±0.6, 12.16±0.4, 10.68±0.3, 3.41±0.04, 3.09±0.04, 3.02±0.04, 2.36±0.04 and 1.80±0.04 Å. Precatalysts and catalysts produced therefrom for the partial oxidation of aromatic hydrocarbons are also provided.