CONTACT ADHESIVE DISPERSION CONTAINING POLYMERS WHICH ARE PRODUCED BY STAGE POLYMERIZATION AND CONTAIN UREIDO GROUPS OR UREIDO-ANALOG GROUPS

摘要

The invention relates to a contact adhesive dispersion, containing a polymer P1 which can be dispersed in water and is formed by emulsion polymerization. The polymer P1 is formed from a monomer mixture, containing (a) at least 40% by weight C4 to C20 alkyl(meth)acrylates which have a glass transition temperature of -30ºC or less if they are polymerized as homopolymers, (b) at least 0.05% by weight (meth)acrylate monomers containing a substituent of the formula, where X denotes CH2, O, NH or NR and R denotes a C1 to C4 alkyl group, and (c) at least 0.1% by weight acid monomers. The polymer P1 is produced by means of polymerization in at least two stages, wherein the glass transition temperature of a polymer made of monomers of the first stage is at least 20ºC lower than the glass transition temperature of a polymer made of monomers of a later, second stage.