Aminoplast-tværbinderresin-sammensætninger, proces til fremstilling deraf og fremgangsmåde til anvendelse

This invention relates to aminoplast crosslinker resins based on at least partially alkylated reaction products of melamine and formaldehyde with the following parameters: the ratio of the amount of substance n (CH 2 O) of combined formaldehyde to the amount of substance n (Mel) of melamine is in the range of from 5.6 mol/mol to 6.2 mol/mol, the ratio of the amount of substance n (RO) of alkyl ether groups in the crosslinker resin to the amount of substance n (Mel) of melamine is in the range of from 5.0 mol/mol to 5.6 mol/mol, the mass fraction of monomer in the resin, calculated as the ratio of the mass of monomer m (1) to the mass m (CR) of the crosslinker resin excluding solvents, additives, and catalysts, is between 35 % and 55 %, to a process for their preparation, and to a method of use thereof as crosslinker in combination with hydroxy-functional polymers for coating of heat-sensitive substrates.