Abstract: The present invention relates to a process for producing NCO-containing prepolymers, to the prepolymers producible by the process and to the use of the prepolymers.

Abstract: The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) alkoxysilano(cyclo)alkylamine is reacted with dialkyl carbonate in the presence of a basic catalyst to give alkoxysilano(cyclo)alkylurethane, B) simultaneously or successively, the catalyst is deactivated, and low boilers, solids, salt burdens and/or high boilers are removed, C) alkoxysilano(cyclo)alkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, wherein the process regime at least of steps C) to D) is continuous.

Abstract: Provided is a storage-stable polyurethane prepegs and mouldings produced therefrom composed of polyurethane compositions with liquid resin components, preferably liquid polyols. A prepeg contains(A)a fibrous support and (B)a matrix material containing a reactive polyurethane composition. The polyurethane composition contains a mixture of a liquid resin component(b)having a functional group reactive towards an isocyanate and having a glass transition temperature(Tg)or melting point below 25° C., with a hydroxyl number of 50 to 2000 mg KOH/gram, and a curing agent(a)comprising a di- or polyisocyanate internally blocked or blocked with a blocking agent. In addition, the polyurethane composition contains 0.6 to NCO equivalents or 0.3 to 1 uretdione group in (a) for each functional group of (b).

Abstract: The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) alkoxysilano(cyclo)alkylamine is reacted with dialkyl carbonate in the presence of a basic catalyst to give alkoxysilano(cyclo)alkylurethane, B) simultaneously or successively, the catalyst is removed and/or deactivated, and low boilers, solids, salt burdens and/or high boilers are removed, C) alkoxysilano(cyclo)alkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, wherein the basic catalyst is a guanidine base.

Abstract: The invention relates to storage-stable one-component (1K) polyurethane prepregs and to shaped bodies produced therefrom.

Abstract: The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) haloalkylalkoxysilane is reacted with metal cyanate and alcohol to give alkoxysilanoalkylurethane, B) alkoxysilanoalkylurethane is freed of low boilers, solids, salt burdens and/or high boilers and optionally purified, C) alkoxysilanoalkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from cleavage bottoms material and collected, wherein the process regime at least of steps C) to D) is continuous.

Abstract: The present invention relates to a composition at least comprising A) an adduct of isocyanatosilanes with hydroxy-functional compounds and B) a tin-free catalyst, and also to a coating composition comprising at least the composition and to the use of the coating composition.

Abstract: A coating composition that includes an allophanate-containing compound can offer improved scratch resistance. The coating composition includes A) at least one allophanate-containing compound having the formula (1): wherein R, R1-R6 are each independently identical or different hydrocarbyl radicals having 1-8 carbon atoms, which may be branched or cyclic, or else may be integrated together to form a cyclic system, and m and n are each independently 0-2, B) a binder, C) optionally, an aliphatic or cycloaliphatic polyisocyanate having an NCO functionality of at least 2, D) optionally, a catalyst, E) optionally, an auxiliary and/or additive, and, F) optionally, a solvent.

Abstract: The present invention relates to a composition comprising a) at least one epoxy resin, b) at least one amine having at least two secondary amino groups which are both part of an organic ring system, and c) at least one salt of a very strong Brosted acid with a counterion selected from metal ions, metal-containing ions, phosphonium ions and ammonium ions, and to processes for production thereof and use thereof.

Abstract: The present invention relates to a low-alkylphenol composition comprising a) at least one epoxy resin, b) at least one amine having at least two secondary amino groups that are both part of an organic ring system, and c) at least one salt of a strong Brønsted acid with a counterion selected from metal ions, metal-containing ions, phosphonium ions and ammonium ions, to processes for production thereof and to the use thereof.

Abstract: The present invention provides a composition comprising a) at least one epoxy resin, b) at least one cyclic amine of the formula (I) in which R1 to R4 is H or an organic radical, with the proviso that at least one of the R1, R2, R3 and R4 radicals ?H, and X?—(Y1)m-(A1)n-(Y2)o-(A2)p-(Y3)q-(A3)r-(Y4)s—??(II) where, independently of one another, m, n, o, p, q, r and s=0 or 1, A1, A2, A3=alkylene or alkenylene radical and Y1, Y2, Y3, Y4?NR5, PR5, O or S, where R5 independently=organic radical, where any two organic radicals selected from R1 to R5 and any radicals present in the alkylene and/or alkenylene radicals A1, A2, A3 may also form one or more further rings, with the proviso that at least one of the radicals selected from R1 to R5 present and any radicals present in the alkylene and/or alkenylene radicals A1, A2, A3 is substituted by at least one —NHR6 or —NH2 group, where R6=organic radical, and c) at least one salt of a strong Brønsted acid with a counterion selected from metal io

Abstract: The present invention provides a composition comprising a) at least one epoxy resin, b) at least one cyclic amine of the formula (I) in which R1 to R4 is H or an organic radical and X?—(Y1)m-(A1)n-(Y2)o-(A2)p-(Y3)q-(A3)r-(Y4)s—, ??(II) where, independently of one another, m, n, o, p, q, r and s=0 or 1, A1, A2, A3=alkylene or alkenylene radical and Y1, Y2, Y3, Y4=NR5, PR5, O or S, where R5 independently=organic radical, where any two organic radicals selected from R1 to R5 and any radicals present in the alkylene and/or alkenylene radicals A1, A2, A3 may also form one or more further rings, with the proviso that at least one of the radicals selected from R1 to R5 present and any radicals present in the alkylene and/or alkenylene radicals A1, A2, A3 is substituted by at least one —NHR6 or —NH2 group, where R6=organic radical, and c) at least one salt of a very strong Brønsted acid with a counterion selected from metal ions, metal-containing ions, phosphonium ions and unsubstituted ammonium io

Abstract: The present invention relates to the use of substituted benzyl alcohols as modifiers in epoxy systems.

Abstract: Crosslinkers based on alkoxysilanes and alkoxysilane mixtures containing an isocyanate group can be used as a starting component in the production of coating compositions or as paint binder component, or can be used with adhesive o sealant binders o binder components having g ups reactive toward alkoxysilane groups.

Abstract: The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) alkoxysilano(cyclo)alkylamine is reacted with dialkyl carbonate in the presence of a basic catalyst to give alkoxysilano(cyclo)alkylurethane, B) simultaneously or successively, the catalyst is deactivated, and low boilers, solids, salt burdens and/or high boilers are removed, C) alkoxysilano(cyclo)alkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, pa wherein the process regime at least of steps C) to D) is continuous.

Abstract: The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) haloalkylalkoxysilane is reacted with metal cyanate and alcohol to give alkoxysilanoalkylurethane, B) alkoxysilanoalkylurethane is freed of low boilers, solids, salt burdens and/or high boilers and optionally purified, C) alkoxysilanoalkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from cleavage bottoms material and collected, wherein the process regime at least of steps C) to D) is continuous.

Abstract: The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) alkoxysilano(cyclo)alkylamine is reacted with dialkyl carbonate in the presence of a basic catalyst to give alkoxysilano(cyclo)alkylurethane, B) simultaneously or successively, the catalyst is removed and/or deactivated, and low boilers, solids, salt burdens and/or high boilers are removed, C) alkoxysilano(cyclo)alkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, wherein the basic catalyst is a guanidine base.

Abstract: The present invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D), A) alkoxysilanoalkylamine is reacted with urea in the presence of an alcohol, optionally in the presence of at least one catalyst, to give alkoxysilanoalkylurethane, B) simultaneously or successively, if used, the catalyst is removed and/or deactivated, and low boilers, medium boilers and/or high boilers are removed, C) purified alkoxysilanoalkylurethane is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, and D) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, in which, in step C), i) the bottoms material is wholly or partly discharged from the cleavage apparatus, ii) subjected to thermal treatment and/or purification and/or an aftertreatment in the presence of alcohol and iii) the material removed, after thermal treatment

Abstract: A monoallophanate can be used in paint or adhesive compositions. The monoallophanate has the formula 1: where R, R1-R6 are each independently identical or different hydrocarbyl radicals having 1-8 carbon atoms, which may be branched or cyclic, or else may be integrated together to form a cyclic system, and m and n are each independently 0-2.

Abstract: A process for preparing trimers and/or oligomers of diisocyanates is disclosed along with a composition of trimers and/or oligomers formed from diisocyanates and monomeric diisocyanates obtainable by reaction of I. 5-94.999% by weight of A) at least one diisocyanate having a boiling point of less than 250° C. (at standard pressure) and/or B) at least one diisocyanate having a boiling point of 250-350° C. (at standard pressure), in the presence of II. 94.999-5% by weight of C) at least one diisocyanate having a boiling point above 350° C. (at standard pressure), III. in the presence of at least one trimerization catalyst in amounts of 0.001% to 5% by weight, and the amounts of add up to 100% by weight.