Basf Aktiengesellschaft

Edmund Keil

Erich Beck

Wolfgang Reich

Matthias Lokai

Klaus Menzel

Adolf Nuber

Peter Enenkel

Ulrich Jager

Ulrich Erhardt

Werner Fries

Bernhard Prantl

Eberhard Ambach

Harro Petersen

Gregor Ley

Hans Renz

Erich Gulbins

Wolfram Weiss

Bernhard Schlarb

Horst Schmidt

Christof Kandzia

Reinhard Lang

Rainer Koniger

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&deg; C.

Improving adhesion of acrylate resins

Photoinitiator mixtures containing acylphosphinoxides and benzophenone derivatives

Radiation-curable binder for printing inks

Described are aqueous, radiation-curable coating compositions comprising:

Aqueous, radiation-curable coating compositions

Urethane(meth)acrylates are obtainable by

Amino-modified urethaneacrylates

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.

Preparation of radiation-curable acrylates that are storage stable with

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.

Preparation of radiation-curable acrylates

Radiation-curable binders which are obtained by reacting A) an amine/formaldehyde condensate having a molar ratio of formaldehyde to amino groups of from 1:1 to 2:1 with

Radiation-curable binders

Radiation-curable, aqueous dispersion

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Heuchelheim, Germany

Edmund Keil