Process for gluing bodies by means of aqueous pressure-sensitive adhesive dispersions based on acrylate / methacrylate using a destabilizing agent DA

摘要

A process is claimed for bonding articles with an aq.pressure-sensitive adhesive dispersion (I) based on copolymers of more than 70 wt% (1-14C alkyl) (meth)acrylates and opt. other vinyl comonomers, with a content of 0.5-10 wt% (meth)acrylic acid (w.r.t. monomers), a Tg of below -10 degrees C, an emulsifier content of not more than 1 wt% (w.r.t. polymer) and a solids content of 10-65 wt% (w.r.t. dispersion). The process comprises treating the dispersion layer with a destabilising agent (DA) so that the dispersion is destabilised, and then forming the joint by bringing the joint halves together without further drying. Pref. suitable substrates are made of plastic, paper, cardboard, wood, ceramic, metal or textiles. Destabiliser (DA) is an aq. electrolyte soln., pref. a 2-20% soln. of CaCl2, Ca(HCO3)2, Ca(NO3)2 or MgSO4, or a dil. acid (or a salt thereof), pref. HCl, citric acid, acetic acid or phosphoric acid.