activator for accelerated adhesion development

摘要

the present invention relates to an activator composition comprising a) between 0.5% and 50% by weight of a catalyst k for crosslinking two-component adhesives which is liquid at 23 ° c, b) between 40% and 99% , 5% by weight of an organic solvent 1, c) between 0% and 10% by weight of at least one silane comprising at least one hydrolyzable silane group and preferably at least one functional group selected from the mercapto, epoxy, amino groups , methacryloyl, vinyl and alkyl, wherein catalyst k comprises a metal 1,3-ketoamidate complex and solvent l is selected from the group of acetone, methyl ethyl ketone, methyl n-propyl ketone, diisobutyl ketone, methyl isobutyl ketone, methyl n -amyl ketone, methyl isoamyl ketone, acetyl acetone, mesityl oxide, cyclohexanone, methyl cyclohexanone, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, n-butyl propionate, diethyl malonate 1 -methoxy-2-propyl, 3-methoxy-n-butyl acetate, 3-ethoxypro ethyl pioneer, diisopropyl ether, diethyl ether, dibutyl ether, diethylene glycol diethyl ether, ethylene glycol diethyl ether, ethylene glycol monopropyl ether, ethylene glycol mono-2-ethylhexyl ether, ethylbenzene, toluene, xylene, heptane , octane, naphtha, turpentine, petroleum ether, benzine, methylene chloride, methanol, ethanol, isopropanol and mixtures of these solvents. the activator composition according to the invention is stable in storage for at least one month, preferably at least 2 months, in particular, at least 4 months or more without showing precipitation from the catalyst or silane. in addition, the activator composition is active regardless of the amount applied and can be applied in layers with a thickness so that the adhesive can be applied after no more than 30 seconds. the activator composition can furthermore accelerate a 2-component polyurethane adhesive in relation to the development of adhesion on the substrate, so that, after no more than an hour after application of the 2017-0055wo 27/27 adhesive, and the curing at room temperature, at least 10% of the shear bond strength achievable after 24 h of storage at room temperature has already been achieved, where the fracture pattern is as cohesive after 1 h as after 24 h.