Abstract: A mixture of acrylic or methacrylic compounds, containing from 40 to 95% by weight, based on the total amount of the acrylic or methacrylic compounds, of epoxide (meth)acrylates, is obtainable by a process comprising the process stepsa) esterification of hydroxy compounds with acrylic acid or methacrylic acid,b) if required, subsequent addition of further acrylic acid or methacrylic acid andc) subsequent reaction of the excess acrylic or methacrylic acid with epoxides in the presence of the esterification product of a).

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: Polymers are obtainable by polymerising or copolymerising 2,7-dioxabicyclo[3.2.1]octane derivatives of the formula ##STR1## in which X, X', Y, Y', Z and Z' each independently are a C.sub.1 -C.sub.2 hydrocarbon radical or hydrogen.

Abstract: Process for producing coatings or moldings by radiation curing, which involves using high-energy light to irradiate radiation-curable compositions containing 1-100% by weight, based on the total amount of free-radically or cationically polymerizable compounds, of compounds A) containing at least one cationically polymerizable 2,3-dihydrofuran group.

Abstract: A process for preparing esters E of low residual acid content from .alpha.,.beta.-monoethylenically unsaturated C.sub.3 -C.sub.6 mono- and dicarboxylic acids S and hydroxyl-containing polycondensates P, wherea) the acid S and the polycondensate P or the monomeric and/or oligomeric and/or polymeric components which form the polycondensate P, are reacted in the presence or absence of a solvent and/or of an esterification catalyst and/or of further additives, with removal of the water which forms, andb) the unreacted acid S is removed by distillation,comprises adding water for the distillative removal of the acid S in step b).

Abstract: A polyurethane which is substantially self-dispersible in water and is obtainable by reactinga) at least one polyisocyanate withb) at least one polyol andc) at least one photoinitiator of the general formula I ##STR1## where R is a radical of the formula II ##STR2## or is --CR.sup.7 R.sup.8 R.sup.9, P(.dbd.O)(R.sup.10).sub.2 or SO.sub.2 R.sup.11,the number-average molecular weight M.sub.n of the polyurethane being greater than 2700, and its use. The invention also relates to aqueous polyurethane resin dispersions and coating compositions comprising the novel polyurethanes, and to their use.

Abstract: Process for producing coatings or moldings by radiation curing, which involves using high-energy light to irradiate radiation-curable compositions containing 1-100% by weight, based on the total amount of free-radically or cationically polymerizable compounds, of compounds A) containing at least one cationically polymerizable 2,3-dihydrofuran structure.

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: Polyurethanes I obtained by reacting1) an isocyanate II as defined in the specification with2) a compound V which is suitable as chain extender, obtained bya) reacting a polyhydric alcohol VI withb1) a compound VII, which includes an epoxy function and, in addition, an alcohol-reactive functional group, to form a compound VIII, and reacting a compound VIII with an .alpha.,.beta.-olefinically unsaturated carboxylic acid IX to give a compound X orb2) an .alpha.,.beta.-olefinically unsaturated carboxylic acid IX, to give a compound X andc) reacting a compound X with an amine XI having at least one primary amino which is reactive toward the .alpha.,.beta. multiple bond of IX,the sum of the number of isocyanato-reactive aminos and hydroxyls of the compound V being greater than the number of isocyanate groups of the compound II. The polyurethanes are useful as binders or binder components for pigment0free or pigment-containing coatings.

Abstract: Radiation-curable compositions based on radiation-curable, free-radically polymerizable compounds comprise .alpha.-olefins having more than 8 carbon atoms.

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: A process for the preparation of a radiation-curable acrylate composition, wherein to compounds A containing at least 2 acrylic groups there are added benzophenone derivatives which are not copolymerizable by free-radical copolymerization and which contain at least one primary or secondary amino group or a hydroxyl group or a mercapto group.

Abstract: A process for preparing (meth)acrylic esters by esterifying (meth)acrylic acid with monohydric or polyhydric alcohols comprises adding to the reaction mixture still comprising (meth)acrylic acid corresponding to an acid number of at least 5 mg of KOH per 1 g of reaction mixture at least one amino compound having at least one primary, secondary or tertiary amino group.

Abstract: Radiation-curable compositions of reduced oxygen sensitivity comprisea) radiation-curable, free-radically polymerizable compounds, andb) capped amino compounds which are surface-active in compounds a) and on irradiation with high-energy light liberate amino compounds having primary, secondary or primary and secondary amino groups, the overall number of hydrogen atoms bonded in the amino groups (amine hydrogens) being at least 2.

Abstract: Radiation-curable (meth)acrylates obtainable by reacting compounds of the formula ##STR1## in which R is C.sub.1 -C.sub.4 -alkyl, aryl or R.sup.1 and R.sup.1 is ##STR2## in which R.sup.2 to R.sup.6 independently of one another are H, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, OH, phenyl, SH, SCH.sub.3, SC.sub.2 H.sub.5, F, Cl, Br, CN, COOH, COO--(C.sub.1 -C.sub.17 -alkyl), COO--(C.sub.5 -C.sub.10 -aryl), CF.sub.3, N(alkyl).sub.2, N(alkyl)(aryl), N(aryl).sub.2, N.sup..sym. (alkyl).sub.3 A.sup..crclbar., N.sup..sym. H(alkyl).sub.2 A.sup..crclbar., A.sup..crclbar. is the anion of an acid, and alkyl or aryl, unless indicated otherwise, is C.sub.1 -C.sub.10 -alkyl or C.sub.5 -C.sub.10 -aryl, respectively, and at least one but not more than 3 of R.sup.2 to R.sup.6 are ##STR3## with hydroxy(meth)acrylates containing at least 1 free hydroxyl group and at least 2 (meth)acrylic groups in the molecule.

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: Radiation-curable compositions comprisinga) compounds having at least two carbon-carbon double bonds with which it is possible for primary or secondary amino groups to form adducts in the form of a Michael-analogous addition reaction (referred to in short below as activated double bonds)b) capped amino compounds which on irradiation with high-energy light liberate amino compounds having primary, secondary or primary and secondary amino groups, the overall number of hydrogen atoms bonded in the amino groups (amine hydrogen atoms) being at least 2.

Abstract: Radiation-curable acrylates are prepared by a process in which the hydroxy compound is reacted with acrylic acid or methacrylic acid in a first stage and, in a second stage, the reaction product of the first stage is reacted with an epoxide compound in the presence of, as a catalyst, a quaternary ammonium or phosphonium compound of the general formula ##STR1## where X.sup.- is an opposite ion and R.sup.1 to R.sup.4 independently of one another are each C.sub.1 -C.sub.18 -alkyl which may be substituted by one or two phenyl groups or are each C.sub.6 -C.sub.12 -aryl which may be substituted by one or two C.sub.1 -C.sub.6 -alkyl groups.

Abstract: Copolymers crosslinkable by a free radical method are prepared by polymer-analogous reaction ofA) a copolymer (A) which is composed ofa1) from 20 to 85 mol % of a monomer (a1) having the structural element of methacrylic acid anda2) from 15 to 80 mol % of another monomer (a2) which undergoes free radical polymerization,a3) from 5 to 50 mol % of the total amount of the monomers (a1) and (a2) being monomers (a3) which carry functional groups and whose functional groups are capable of undergoing a condensation or addition reaction,withB) an olefinically unsaturated monomer (B) which carries a functional group which is complementary to that of the monomers (a3),by a process in which the polymer-analogous reaction is carried out at from 90.degree. to 150.degree. C. in an average residence time of from 3 to 20 minutes in highly concentrated solution or in the absence of a solvent. Said copolymers are used as binders for powder coatings.

Abstract: Radiation-curable acrylates are prepared by a process in which, in a 1st stage, a hydroxy compound is reacted with acrylic acid or methacrylic acid and, in or before a 2nd stage, the reaction product of the 1st stage is then reacted with an epoxy compound and compounds having one or more primary or secondary amino groups are added in the 2nd stage and the reaction in the 2nd stage is continued, after the addition of these compounds, until the acid number of the reaction mixture has decreased by at least 3 mg KOH/g of reaction mixture from the time of the addition of these compounds.