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.

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 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.

Abstract: Polyisocyanate addition products are made by reacting a polysiloxane having isocyanate reactive end groups, excess polyisocyanate and a compound selected from the group consisting of aliphatic alcohols, primary aliphatic amines, secondary aliphatic amines and mixtures thereof having a molecular weight of from 75 to 5000 and at least one tertiary amino group and/or oxyalkylene unit. In a preferred embodiment, the polysiloxane is reacted with excess polyisocyanate and the reaction product is subsequently reacted with the alcohol and/or amine. The addition products of this invention are particularly useful as mold release agents in the production of molded lacquer coated plastics by the "in-mold coating process.

Abstract: The invention relates to plastics mouldings, more particularly transparent plastics mouldings, which are finished with a coating of three successively stoved, chemically different layers, and to a process for producing the finish. The special finish considerably improves the scratch resistance, abrasion resistance, weathering resistance and yellowing resistance of the plastics surfaces without affecting the transparency of the plastics moulding. The first layer (primer layer) is produced from a hardenable acrylic resin and an aminoplast resin, the second layer from a thermoplastic acrylic resin, a plasticizer and a masked polyisocyanate and the third layer (cover layer) from at least one partially hydrolyzed organosilane, an .alpha.,.omega.-dihydroxy polydimethyl siloxane, a silica sol and at least one masked polyisocyanate as binder in the presence of a water-soluble organic or inorganic acid. The three-layer coating contains UV-absorbers, light stabilizers and, optionally, standard auxiliaries.

Abstract: The present invention relates to protective coating formulations, in particular to transparent abrasion-resistant and scratch-resistant coatings on transparent thermoplastic polymers, which coatings essentially consist of a hydrolyzed siloxane compound, a dispersion of colloidal silicon dioxide, etherified methylolmelamine, a blocked polyisocyanate, acetic acid and a polysiloxane terminated by hydroxyl groups.

Abstract: The present invention relates to a process for the production of specific polyisocyanates by reacting diamines containing hydrogen atoms which are active in the context of the isocyanate addition reaction with excess quantities of organic diisocyanates. The invention also relates to a modification of the above process characterized in that the diamines are reacted first with excess quantities of a first diisocyanate after which the thus obtained reaction product which contains a urea group and a biuret group is reacted in a second stage with a second diisocyanate. The invention also relates to the use of polyisocyanates as the isocyanate component in the production of polyurethane plastics by the isocyanate-polyaddition process.

Abstract: This invention relates to new ammonium salts of .alpha.-ketocarboxylic acids, to their use for the production of amines in situ by photochemical decomposition and to photochemically hardenable coating compositions containing these ammonium salts.

Abstract: A process for the preparation of polyisocyanates containing biuret and/or higher polyuret groups by reacting secondary diamines with diisocyanates characterized in that the reaction is carried out in the presence of catalytic quantities of strong acids which form mixed carbamic acid anhydrides with isocyanates. Alternatively, the secondary diamines may be reacted with organic diisocyanates in the absence of catalysts to form a urea diisocyanate which is then reacted in the presence of catalytic quantities of strong acids which form mixed carbamic acid anhydrides either with the same diisocyanate used in the first step or a second diisocyanate. The invention also relates to the polyisocyanates containing biuret and/or higher polyuret groups obtainable by this process.

Abstract: The present invention relates to an improved process for the preparation of neopentyl glycol polyesters by reacting neopentyl glycol with carboxylic acids or derivatives thereof in the presence of minor amounts of glycols which boil at lower temperatures than neopentyl glycol. These low-boiling glycols obviate previous difficulties relating to the sublimation of neopentyl glycol. Thus, the present process offers safety advantages since neopentyl glycol does not crystallize in the reaction apparatus and also provides better control over the molecular ratio of acid groups to alcohol groups.