(METH)ACRYLATE COMPOSITION WITH IMPROVED LOW-TEMPERATURE ELASTICITY

The invention relates to a two-component composition consisting of a component K1 comprising a) at least one monomer A according to formula (IIIa), where R1 represents either a hydrogen atom or a methyl group, preferably a methyl group; R2 represents either a linear or branched hydroxy alkyl groups with 2 to 6 carbon atoms or a group with 4 to 8 carbon atoms, said group comprising either a phenyl group or an aliphatic 5- or 6-ring with at least one ether oxygen in the ring structure; b) at least one monomer B according to formula (IIIb), where R3 represents either a hydrogen atom or a methyl group, preferably a methyl group; R4 represents a linear alkyl group with more than 12 carbon atoms in the chain and preferably maximally 20 carbon atoms in the chain; c) preferably between 10 wt.% and 20 wt.%, based on component K1, of at least one elastomer C of the formula (I), where R represents either a hydrogen atom or a methyl group; X represents a polymer polyol after removing two OH groups; and Y represents O or NR", where R" represents a hydrocarbon group or a hydrogen atom, preferably a hydrogen atom; and d) preferably at least one additive selected from the group consisting of a core shell polymer, an activator for a radical curing process, an inhibitor for a radical curing process, a filler, and an adhesive; with the proviso that component K1 contains between 25 wt.% and 75 wt.%, preferably between 40 wt.% and 60 wt.%, based on component K1, of the mixture of monomer A and monomer B, and with the proviso that the ratio of monomer A to monomer B in component K1 lies between 1:1 and 9:1, preferably between 6:4 and 8:2; and a component K2 comprising at least one initiator for a radical curing process. Such compositions are suitable for adhering and sealing processes and for producing coatings. The compositions according to the invention have a high elasticity at room temperature but are simultaneously still sufficiently elastic even at very low temperatures down to -20 °C and can be formulated without volatile monomers that have a highly unpleasant odor such as MMA. L'invention concerne une composition à deux constituants constituée d'un constituant K1 comprenant a) au moins un monomère A selon la formule (IIIa), dans laquelle R1 représente soit un atome d'hydrogène, soit un groupe méthyle, de préférence un groupe méthyle ; R2 représente soit un groupe hydroxyalkyle linéaire ou ramifié comprenant de 2 à 6 atomes de carbone soit un groupe comprenant de 4 à 8 a