Abstract: The invention relates to a method for producing activated carbon, in particular spherical activated carbon, wherein particles are carbonized from an organic precursor substance, wherein the activated carbon obtained from the particles is shock-chilled after carbonization, the temperature gradient being more than 100 K/min.

Abstract: The invention relates to a method for producing spherical activated carbon, wherein polymer globules, which comprise thermally decomposing chemical groups, are carbonized. It is characterized by that during the carbonization, a supplier of free radicals is added to the polymer globules, the supplier of free radicals forming free radicals, which are different from the free radicals that are generated by the decomposition of the chemical groups.

Abstract: The invention relates to a method for producing spherical activated carbon, wherein polymer globules, which comprise thermally decomposing chemical groups, are carbonized. It is characterized by that during the carbonization, a supplier of free radicals is added to the polymer globules, the supplier of free radicals forming free radicals, which are different from the free radicals that are generated by the decomposition of the chemical groups.

Abstract: The invention relates to a method for producing spherical activated carbon, wherein polymer globules, which comprise thermally decomposing chemical groups, are carbonized. It is characterized by that during the carbonization, a supplier of free radicals is added to the polymer globules, the supplier of free radicals forming free radicals, which are different from the free radicals that are generated by the decomposition of the chemical groups.

Abstract: The invention relates to a method for producing activated carbon, in particular spherical activated carbon, wherein particles are carbonized from an organic precursor substance, wherein. the activated carbon obtained from the particles is shock-chilled after carbonization, the temperature gradient being more than 100 K/min.

Abstract: The invention relates to a method for producing spherical activated carbon, wherein polymer globules, which comprise thermally decomposing chemical groups, are carbonized. It is characterized by that during the carbonization, a supplier of free radicals is added to the polymer globules, the supplier of free radicals forming free radicals, which are different from the free radicals that are generated by the decomposition of the chemical groups.

Abstract: The invention relates to spherical active carbon having the following pore size distribution: a) 1.2 1.7 nm: 20-50%, b) 1.7 2.1 nm: 20-50%, c) 2.1 2.5 nm: 10-25%, d) 2.5 2.9 nm: 3-15%, e) 2.9 3.3 nm: 1-10%. The sum of a) to e) is at least 88%. The difference between the sum of a) to e) in relation to 100% corresponds to a proportion of pores having a diameter of <1,2 nm and/or >3,3 nm. The fractal dimension of the open porosity is at least 2.30.

Abstract: The invention relates to spherical active carbon having the following pore size distribution: a) 1.2 1.7 nm: 20-50%, b) 1.7 2.1 nm: 20-50%, c) 2.1 2.5 nm: 10-25%, d) 2.5 2.9 nm: 3-15%, e) 2.9 3.3 nm: 1-10%. The sum of a) to e) is at least 88%. The difference between the sum of a) to e) in relation to 100% corresponds to a proportion of pores having a diameter of <1,2 nm and/or >3,3 nm. The fractal dimension of the open porosity is at least 2.30.

Abstract: The invention relates to novel 3-substituted 1,2,4-benzotriazines of general formula I. The invention is also directed to a method of producing said 3-substituted 1,2,4-benzotriazines and to the use thereof in the treatment and prophylaxis of tumor-related diseases.

Abstract: The present invention relates to aqueous compositions containinga) bis(1,3,4-oxadiazolin-5-ones) corresponding to formula (I) ##STR1## wherein R represents a single bond or a divalent aliphatic, araliphatic or aromatic radical having 1 to 18 carbon atoms andb) organic polyamines or polyamine blends having an average of more than 2 NH-- and/or NH.sub.2 -- groups.The present invention also relates to coatings, adhesives or sealants prepared from these aqueous compositions, in particular automotive clear coats.

Abstract: The present invention relates to a process for preparing mortar/concrete compositions by incorporating into the mortar/concrete compositions either before or during the mixing operation a water-dispersible polyisocyanate whicha) has an average isocyanate functionality of 1.8 to 4.0,b) contains 4.0 to 25.0 wt. % of aliphatically and/or cycloaliphatically bound isocyanate groups (calculated as NCO; molecular weight=42) andc) contains 5 to 80 wt. % of ethylene oxide units present within polyether chains (calculated as C.sub.2 H.sub.4 O; molecular weight=44), in whichd) the polyether chains contain an average of 5 to 50 ethylene oxide units.

Abstract: The present invention relates to a heat-crosslinkable water-based coating composition containing as bindera) a water-soluble or water-dispersible polyol component andb) a water-soluble or water-dispersible blocked polyisocyanate which has an average NCO functionality of 2.0 to 2.6 and is based on the reaction product ofb1) a polyisocyanate mixture having an average NCO functionality of 2.5 to 3.5 and containing (i) at least 15% by weight of an organic diisocyanate,b2) a blocking agent for isocyanate groups in an amount of 50 to 80 equivalent-%, based on the isocyanate groups of component b1) andb3) an aliphatic monohydroxymonocarboxylic acid in a quantity of 20 to 50 equivalent-%, based on the isocyanate groups of component b1) and the hydroxyl groups of component b3), wherein the equivalent ratio, based on the isocyanate-reactive groups of blocking agent b2) and the hydroxyl groups of component b3) to the isocyanate groups of component b1) is at least 0.9:1.

Abstract: The present invention relates to polyisocyanates which contain ester groups and havea) a content of aliphatically bound isocyanate groups of 18 to 33% by weight,b) an average NCO functionality of 4.1 to 10, preferably from 4.5 to 10, andc) a viscosity of 200 to 2,5000 mPa.s at 22.degree. C.The present invention also relates to preferred polyisocyanates which contain ester groups and havea) a content of aliphatically bound isocyanate groups of 20 to 33% by weight,b) an average NCO functionality of 5 to 8 andc) a viscosity of 500 to 1,000 mPa.s at 22.degree. C.The present invention further relates to a process for the preparation of these preferred polyisocyanates by reacting isocyanatocarboxylic acid chlorides with O-silylated, polyhydric alcohols at a temperature of about 50.degree. to 150.degree. C. Finally, the present invention relates to the use of the polyisocyanates as the isocyanate component for two-component polyurethane coating compositions.

Abstract: The present invention is directed to a process for the production of isocyanurate polyisocyanates by the partial trimerization of the isocyanate groups of aliphatic diisocyanates in the presence of catalysts which accelerate the trimerization of isocyanate groups, termination of the trimerization reaction at the particular degree of trimerization required and removal of unreacted starting diisocyanate and, optionally, other volatile constituents, characterized in that at least one diol containing ester groups and having an average molecular weight of 350 to 950 is added to the reaction mixture at any time before removal of the excess starting diisocyanate in a quantity of 1 to 50% by weight, based on the weight of the diisocyanate used as starting material, the type of reactants and the quantitative ratios between them being selected so that, on completion of the reaction, at least 10% by weight free starting diisocyanate is still present in the reaction mixture, not including any inert solvent used, and the

Abstract: The present invention is directed to a process for the preparation of urethane-modified biuret polyisocyanates by the reaction of(a) 1,6-diisocyanatohexane with subequivalent quantities of(b) biuretizing agents based on water and/or organic compounds which react with isocyanate groups to form biuret groups,to form biurets followed by removal of the unreacted, excess 1,6-diisocyanatohexane and any volatile components present, characterized in that at any stage before removal of the excess 1,6-diisocyanate,(c) at least one diol containing ester groups and having an average molecular weight of about 350 to 950 is added to the reaction mixture in a quantity of about 1 to 50% by weight, based on the weight of the 1,6-diisocyanatohexane, the diol reacting with part of the isocyanate groups present to form urethane groups.The invention is also directed to the urethane-modified biuret polyisocyanates obtained by this process and their use as polyisocyanate components in two-component polyurethane lacquers.

Abstract: The present invention is directed to polyester polyols in the hydroxyl number range of about 80 to 250 which are based on reaction products of(a) about 52 to 60 mole % of a polyol component with(b) about 40 to 48 mole % of dicarboxylic acid component, characterized in that(a) the polyol component is based on (i) about 2 to 30 mole % of at least one dihydric aliphatic alcohol which has at least two carbon atoms and is different from neopentyl glycol, (ii) about 5 to 40 mole % of at least one aliphatic alcohol which is at least trihydric and has at least 3 carbon atoms, (iii) about 20 to 60 mole % of bis-(hydroxymethyl)-cyclohexane and (iv) about 10 to 50 mole % of neopentyl glycol, and(b) the dicarboxylic acid component is based on (v) about 50 to 99 mole % of at least one aliphatic, saturated dicarboxylic acid or an anhydride of such an acid containing at least 2 carbon atoms and (vi) about 0.

Abstract: Binders which are hardenable by radiation or peroxides and are useful in coating compositions are compounds containing isocyanurate groups and olefinic double bonds produced by the reaction of components (a), (b) and (c) wherein(a) is a polyisocyanate component containing isocyanurate polyisocyanates which is(i) N,N',N"-tris-(isocyanatohexyl)-isocyanurate alone or in admixture with its higher homologs containing more than one isocyanurate ring or(ii) mixtures of the polyisocyanates (i) with up to 40 NCO-equivalent-%, based on the total component (a), of other polyisocyanates containing aliphatically or cycloaliphatically bound isocyanate groups;(b) is an olefinically unsaturated alcohol component comprising at least one hydroxyalkyl ester of acrylic acid or methacrylic acid; and(c) is a polyol component consisting essentially of a polyester polyol having an OH value of 80 to 350 based on (i) an acid component, of which at least 80 carboxyl equivalent-% is adipic acid, isophthalic acid or a mixture of both and

Abstract: The present invention relates to new binder combinations comprising(A) 99-30 parts by weight of OH-functional graft copolymer resins prepared by copolymerization of a polybutadiene having a molecular weight of from 500 to 10000 and containing more than 30% of 1,2-vinyl structure with selected olefinically unsaturated monomers and(B) 1 to 70 parts by weight of a multifunctional crosslinking resin, preferably a polyisocyanate resin. The new binder combinations are suitable for preparing coatings having a very high level of elasticity and an excellent surface hardness.

Abstract: The present invention is directed to substantially linear polyurethanes obtained from 1 mol of relatively high molecular weight macrodiols such as polyesters, polyethers and polycarbonates having a molecular weight of 400 to 5000, preferably about 500 to 3000, about 1.5 to 16.5 mols of aromatic diisocyanates, optionally about 0.01 to 1 mol of chain breaking agents in the form of compounds which are monofunctional in their reaction with isocyanates, and about 0.5 to 15 mols of low molecular weight, difunctional chain lengthening agents, characterized in that at least 10 mol-% of the chain lengthening agents is 2,2,4-trimethylpentanediol-(1,3) and the remaining chain lengthening agents, having molecular weights of 62 to 399 (preferably 62 to 250), are preferably diols.

Abstract: The present invention relates to polyester polyols having a hydroxyl number of about 80 to 250, containing reaction products of(a) 54 to 58 mol % of a polyol component and(b) 46 to 42 mol % of a dicarboxylic acid component,characterized in that(a) the polyol component contains (i) about 70 to 90 mol % of a hexane-1,6-diol and (ii) about 10 to 30 mol % of at least one higher valent alcohol selected from trimethylolpropane, glycerol, pentaerythritol and mixtures of these polyols, and(b) the dicarboxylic acid component contains (iii) about 50 to 80 mol % of isophthalic acid, (iv) about 20 to 30 mol % of at least one dicarboxylic acid of the formula HOOC--(CH.sub.2).sub.n --COOH (n=an integer from 2-8) and (v) 0 to about 20 mol % of at least one dicarboxylic acid or at least one dicarboxylic acid anhydride selected from terephthalic acid, phthalic acid, phthalic acid anhydride, tetrahydrophthalic acid, tetrahydrophthalic acid anhydride, hexahydrophthalic acid and hexahydrophthalic acid anhydride.