Abstract: Binding agents having barrier properties are provided which contain: a) a compound having at least one NCO group and at least one reactive functional group, which can be cured by radiation and which serves as component (A), and; b) a silicon-organic compound serving as component (B) with at least one NCO group and at least one functional group of formula (I): —Si(Z)n(X)3?n, in which Z represents C1-C18alkyl group, preferably C1-C4alkyl group; X represents —NH2; —NH—CO—R; —OOC—R; —O—N?C(R)2 or OR?; R represents a linear or branched, saturated or unsaturated C1-C18alkyl radical; R? represents R, an oxyalkylene radical having up to 4 carbon atoms, a C5-C8 cycloalkyl radical; a C6-C10 aryl radical or a C7-C12 aralkyl radical; and n equals 0, 1 or 2. The binding agent can be used as a radiation curable binding agent in coating agents, fillers, sealants or adhesives, for example in the preparation of laminated films having barrier properties.

Abstract: An adhesive composition having barrier characteristics contains a) a compound having at least one NCO group and at least one reactive functional group that can be cured by irradiation and b) a nanoscale filler. Such compositions are useful as radiation curable one-component or two-component adhesives, particularly in the production of composite films with barrier characteristics. Composite films prepared in this manner can be utilized to package foods and medicaments.

Abstract: Binding agents having barrier properties are provided which contain: a) a compound having at least one NCO group and at least one reactive functional group, which can be cured by radiation and which serves as component (A), and; b) a silicon-organic compound serving as component (B) with at least one NCO group and at least one functional group of formula (I): —Si(X)3-n, in which X represents —NH2; —NH—CO—R; —OOC—R; —O—N?C(R)2 or OR?; R represents a linear or branched, saturated or unsaturated C1-C18 alkyl radical; R? represents R, an oxyalkylene radical having up to 4 carbon atoms, a C5-C8 cycloalkyl radical; a C6-C10 aryl radical or a C7-C12 aralkyl radical; and n equals 0, 1 or 2. The binding agent can be used as a radiation curable binding agent in coating agents, fillers, sealants or adhesives, for example in the preparation of laminated films having barrier properties.

Abstract: Polyurethane prepolymers containing NCO (isocyanate) groups and having a low content of monomeric polyisocyanate, processes for their production and uses employing these prepolymers. The polyurethane prepolymers of the invention are produced from by a reaction employing monomeric polyisocyanates and polyols.

Abstract: A polyurethane binder with a low content of readily volatile isocyanate-functional monomer is provided by a process of (a) reacting a first at least difunctional isocyanate and a first polyol component at an NCO:OH ratio less than 2 wherein the first at least difunctional isocyanate has an NCO group with a slower rate of reaction with the OH groups than a second NCO group to produce a reaction product containing free OH groups and reacting the reaction product with a second polyol and a second at least difunctional isocyanate wherein the second at least difunctional isocyanate has isocyanate groups with a more rapid rate of reaction with the OH groups than the predominent percentage of isocyanate groups present in the reaction product.

Abstract: A reactive adhesive with a low monomer content and multistage hardening is provided. The adhesive can be solventless or solvent containing, and is a mixture of a polyurethane prepolymer (A) with a low content of monomeric isocyanate and having at least one functional group reactive with a composition containing at least one acidic hydrogen atom and at least one compound (B) containing a functional group polymerizable by irradiation. The adhesive composition can contain photoinitiators, hardeness and additives. The reactive adhesive is cured by UV radiation or electron bean radiation and by reaction of free isocyanate groups with the compositions containing at least one acidic hydrogen atom.

Abstract: A reaction adhesive is provided. The reaction adhesive contains a reactive resin, an encapsulated curing agent for the resin and crystalline monoparticles with ferromagnetic, ferrimagnetic, superparamagnetic, prezoelectric or ferroelectric properties. The reaction adhesive is applied to the substrates and the substrates joined. The adhesive is subjected to an alternating electrical, magnetric or electromagnetic field to release the curing agent.

Abstract: Polyurethane prepolymers containing NCO (isocyanate) groups and having a low content of monomeric polyisocyanate, processes for their production and uses employing these prepolymers. The polyurethane prepolymers of the invention are produced from by a reaction employing monomeric polyisocyanates and polyols.

Abstract: A method of forming a film laminate uses an adhesive composition containing at least three components A, B and C. The method includes providing a radiation curable adhesive that contains a) a compound bearing at least one epoxy group, b) a compound with at least three OH groups and a molecular weight below 400 and c) a photoinitiator which initiates a polymerization of components a) and b) after exposure to light with a wavelength of 100 to 600 nm.

Abstract: An adhesive containing a) a compound containing at least one vinyl ether group which has a molecular weight of more than 400 and b) a photoinitiator which initiates a polymerization of component A after exposure to light with a wavelength of 100 to 600 nm is useful for the production of a film laminate.

Abstract: The invention relates to aqueous polymer dispersions suitable as reactive resin component (A) for a two-component reactive system.

Abstract: A method of forming a film laminate uses an adhesive containing at least three components A, B and C. The method includes providing a radiation curable adhesive that contains a) a compound bearing at least one epoxy group, b) a compound with at least three OH groups and a molecular weight below 400 and c) a photoinitiator which initiates a polymerization of components a) and b) after exposure to light with a wavelength of 100 to 600 nm.

Abstract: A polyurethane binder with a low content of readily volatile isocyanate-functional monomer is provided by a process of

Abstract: A low-monomer PU prepolymer containing free NCO groups which is obtained from polyhydric alcohols and diisocyanates differing in their reactivity and which is distinguished by the ratio of the NCO groups of the partly slower-reacting diisocyanate to the NCO groups of the faster-reacting diisocyanate. It is greater than 6:1. Nevertheless the prepolymer according to the invention cures more quickly than a known prepolymer predominantly containing fast-reacting NCO groups. In a preferred embodiment, TDI is used as the partly slower-reacting diisocyanate while MDI is used as the faster-reacting diisocyanate. The prepolymer is produced in two stages. The prepolymer according to the invention is suitable for bonding plastic articles, metals and paper, especially films. The accelerated absence of migration is particularly noticeable in this regard.

Abstract: The invention relates to aqueous polymer dispersions suitable as reactive resin component (A) for a two-component reactive system.

Abstract: The invention relates to polyurethane compositions with a low content of monomeric diisocyanates. Trifunctional isocyanates optionally reduced in their functionality to 3.0.+-.0.7 with a monofunctional terminator are preferably used for this purpose. In this way, the compositions contain considerably smaller quantities of readily volatile isocyanates. The compositions are suitable for use as reactive hotmelt adhesives, lamination adhesives, adhesive/sealing compounds, primers and for the production of foam plastics from non-reusable pressurized containers (aerosol cans). The low content of volatile monomeric diisocyanates enables the need for safety measures in the workplace to be significantly reduced, in addition to which the disposal of residues remaining in the containers is made considerably easier.

Abstract: Film-forming reactive systems for the surface-to-surface bonding and/or coating of substrates, more particularly for heat-sealable coatings are provided. The system is based on an aqueous dispersion of at least two epoxy-curable resins (I) and an epoxy compound as the curing component (II). The epoxy-curable resins are a polyurethane polymer containing epoxy-reactive functional groups present as the curable resin (Ia) and an aqueous dispersion of an acrylate and/or methacrylate homopolymer or copolymer containing carboxyl and/or methylol groups present as an additional curable resin (Ib). Also provided is a method for the production of laminates which employs the reactive system to bond substrates.

Abstract: Process and compositions for producing bondings based on a two component adhesive system comprising1. an epoxide group-containing prepolymer obtained by reacting a polyether-urethane or a polyester-urethane which contains at least two terminal isocyanate groups with equivalent quantities of glycidol, and2. a primary amino group-containing polyether or polyamide having at least two primary amino groups, and a molecular weight between 200 and 1800.