Abstract: The present invention relates to the use of radiation-curable coating material for coating wood-base materials, a method for coating wood-base materials and the coated wood-base materials thus obtained.

Abstract: Compounds having isocyanate groups with or without blocking, allophanate groups and free-radically polymerizable C—C double bonds, the C—C double bonds being in activated form by virtue of a carbonyl group attached directly to them or by virtue of an oxygen atom in ether function (activated double bonds), derived from polyisocyanates and alcohols A which in addition to the alcohol group also carry an activated double bond (compounds I). The invention additionally relates to radiation-curable formulations and coating compositions comprising the compounds I, to methods for coating using these substances, and to coated articles produced using these methods.

Abstract: In a process for improving the adhesive strength of radiation-cured films of acrylate resins which comprise compounds having at least one amine group and at least one unsaturated acrylate group and, in particular, an amino-modified acrylate resin having a molecular weight Mn of at least 300, on substrates, the acrylate resins are admixed with amine-hardenable polyepoxides having an epoxide value of from 1 to 15 mol/kg such as polyglycidyl esters or polyglycidyl ethers. Preferred curable mixtures of amine-modified acrylate resins with polyepoxides have amine numbers of from 1 to 250 mg KOH/g and epoxide values of from 0.1 to 4 mol/kg. The mixtures applied as coating films to metal substrates or plastics substrates, in particular, are radiation-cured with, e.g., UV light and an at least partial amine hardening of the polyepoxide compounds in the mixture is conducted by thermal conditioning at, e.g., from 50 to 120° C.

Abstract: Aqueous dispersions of mixtures of (a) polyurethanes having hydrophilic groups which result in water dispersibility of the polyurethane and (b) radiation-curable (meth)acrylate prepolymers which are dilutable in at least 5% by weight of water, such as hydroxyl-containing polyether acrylates, are suitable, owing to their penetration behavior and their high solids absorption in paper, for use as radiation-curable coating or impregnating materials for paper substrates.

Abstract: The present invention relates to a process for preparing nondispersing (meth)acrylic esters containing urethane groups, comprising a) reacting at least one hydroxyl-containing compound with (meth)acrylic acid in a solvent, to form an ester; b) removing the solvent and optionally a part of unreacted (meth) acrylic acid; c) reacting the mixture resulting from stage a) or b) with at least one epoxy-functional compound in an amount corresponding to the acid number of the mixture; and d) reacting the mixture resulting from stage c) with at least one compound containing isocyanate groups, and such esters obtainable in this way, and radiation-curable coating compositions comprising said esters, and a process for preparing these coating compositions.

Abstract: A photoinitiator mixture comprising a) at least one acyl- or diacylphosphine oxide of the formula I and b) at least one benzophenone derivative of the formula

Abstract: A process for preparing radiation-curable, urethane-functional prepolymers by reacting an isocyanate-functional component A with an OH-containing component B, wherein either component A embraces two different isocyanate compounds A1 or one isocyanate compound A1 and at least one isocyanate compound A2 or component B embraces at least two different compounds B1. Also, the prepolymers obtainable by the process and the radiation-curable formulations comprising them. Furthermore, the use of the radiation-curable formulations for coating substrates, a method of coating substrates, and the coated substrates themselves.

Abstract: A photoinitiator blend, containinga) at least one monoacylphosphine oxide of formula I ##STR1## in which R.sup.1 denotes C.sub.1 -C.sub.18 alkyl; C.sub.1 -C.sub.4 alkyl, C.sub.5 -C.sub.8 cycloalkyl, C.sub.7 -C.sub.9 phenylalkyl, phenyl, naphthyl, biphenyl, all substituted by halogen or C.sub.1 -C.sub.6 alkoxy; phenyl, naphthyl or biphenylyl, all mono- or poly-substituted by halogen, C.sub.1 -C.sub.12 alkyl and/or C.sub.1 -C.sub.12 alkoxy; or a monovalent N--, O--, or S--containing 5-membered or 6-membered heterocyclic radical,R.sup.2 denotes phenyl, naphthyl, biphenylyl; phenyl, naphthyl or biphenylyl, all mono- or poly-substituted by halogen, C.sub.1 -C.sub.12 alkyl and/or C.sub.1 -C.sub.12 alkoxy; a monovalent N--, O--, or S--containing 5-membered or 6-membered heterocyclic radical, C.sub.1 -C.sub.18 alkoxy, phenoxy; phenoxy substituted by halogen, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy; benzyloxy, cyclohexyloxy or R.sup.2 and R.sup.1 form a ring together with the phosphorus atom,R.sup.

Abstract: A mixture comprisinga condensation resin A) constructed from urea or urea derivatives a.sub.1) and ketones or aldehydes a.sub.2) selected from acidic-CH aldehydes or ketones and their mixtures with formaldehyde, anda radiation-curable compound B) having at least 2 acryloyl or methacryloyl groups is useful in offset printing.

Abstract: Described are aqueous, radiation-curable coating compositions comprising:a) from 5.0 to 90.0% by weight of at least one water-dispersible polymer P comprising at least one .alpha.,.beta.-ethylenically unsaturated, radiation-polymerizable double bond,b) from 0.1 to 90% by weight of at least one radiation-curable compound S which is different from P and which is soluble in water or is dilutable with at least 10% by weight of water, based on the overall weight of the coating composition, and which comprises at least one .alpha.,.beta.-ethylenically unsaturated, radiation-polymerizable double bond,c) from 0 to 20% by weight of a photoinitiator,d) from 0 to 60% by weight of a filler,e) from 0 to 20% by weight of further additives,f) water to 100% by weight and their use.

Abstract: Urethane(meth)acrylates are obtainable bya) reacting polyether(meth)acrylates or polyester(meth)acrylates, which may also have at least one free hydroxyl group, with primary or secondary amino compounds which have at least one hydroxyl group, so that from 0.5 to 60 mol % of the (meth)acrylate groups are present in the form of Michael adducts with the amino compounds, andb) subsequently reacting the product obtained in a) with isocyanates.

Abstract: Urethane(meth)acrylates are obtainable bya) reacting polyether(meth)acrylates or polyester(meth)acrylates, which may also have at least one free hydroxyl group, with primary or secondary amino compounds which have at least one hydroxyl group, so that from 0.5 to 60 mol % of the (meth)acrylate groups are present in the form of Michael adducts with the amino compounds, andb) subsequently reacting the product obtained in a) with isocyanates.

Abstract: Aqueous dispersions containA) from 20 to 90% by weight of a dispersed polymer having a glass transition temperature above 30.degree. C. andB) from 10 to 80% by weight of a tri-, tetra-, penta-or hexa(meth)acrylate of an alkoxylated, trivalent to hexavalent alcohol having a mean degree of alkoxylation of the hydroxyl groups of the alcohol, defined as the quotient of the number of alkoxy groups to the number of hydroxyl groups, ie. the functionality of the alcohol prior to the alkoxylation, of at least 0.5,the stated weights being based on the sum of A) and B).

Abstract: Arenebisphosphine oxides of the general formula ##STR1## where R.sup.1 to R.sup.4 independently of one another are each hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, C.sub.5 -C.sub.10 -aryl, C.sub.5 -C.sub.12 -aryloxy or C.sub.7-C.sub.14 -arylalkoxy, R.sup.5 and R.sup.6 independently of one another may each be C.sub.1 -C.sub.6 -alkyl, C.sub.5 -C.sub.10 -cycloalkyl or C.sub.5 -C.sub.12 -aryl, each of which may furthermore contain one or two nitrogen or sulfur atoms in the ring system or carry one or two halogen atoms or C.sub.1 -C.sub.6 -alkyl or C.sub.1 -C.sub.6 -alkoxy groups as substituent on the ring system, or C.sub.1 -C.sub.6 -alkoxy, C.sub.3 -C.sub.8 -alkoxyalkoxy, C.sub.5 -C.sub.12 -aryloxy or C.sub.7 -C.sub.14 -arylalkoxy, or R.sup.5 and R.sup.6 together form a bridge of 2 to 10 carbon atoms, in which some of the carbon atoms may furthermore be part of an aromatic ring.

Abstract: The invention relates to heterocyclic organometallic compounds formula I below and to the use thereof for the production of thin films and layers on substrates by gas phase deposition.

Abstract: The invention relates to the use of stabilised organometallic adduct compounds for the production of thin films and epitaxic layers by gas phase deposition.

Abstract: The invention relates to cyclic organometallic compounds which are intramolecularly stabilized and also to their use to produce thin films and epitaxial layers by gas-phase deposition.