FIELD: chemistry.
SUBSTANCE: invention relates to thermomelting adhesive compositions, containing a) at least one thermoplastic silane-grafted poly-α-olefin (P), which is solid substance at 25°C, b) at least one reaction product (RP) of polyisocyanate and silane (S), capable of interaction with isocyanate, where silane (S), capable of interaction with isocyanate contains exactly one group, capable of interacting with isocyanate, selected from the group, consisting of hydroxyl group, mercaptogroup and aminogroup, and where said reaction product has molecular weight Mw lower than 1500 g/mol, where silane-grafted poly-α-olefin (P) represents silane-grafted copolymer or terpolymer, consisting of at least one monomer, selected from the group, consisting of ethylene, propylene, butylenes and isobutylene. Invention also relates to compositional element (1), which contains first substrate (2, S1), which, in particular, represents polyolefin, thermomelting adhesive composition (4) by the invention or thermomelting adhesive water-curable composition (5), by the invention, as well as second substrate (3, S2), which, in particular, represents polar synthetic material or metal, or glass, where said thermomelting adhesive composition or said curable thermomelting adhesive composition is located between first substrate (S1) and substrate (S2). Thermomelting adhesive compositions can be used as constructive adhesive, laminating adhesive, adhesive for fabrics, adhesive for furniture or adhesive for obtaining sandwich-elements and for gluing substrates, in particular for gluing nonpolar substrates, preferably polyolefins, with polar substrates, preferably polar synthetic materials or metals or glass.
EFFECT: thermomelting adhesives have good adhesion to polar and nonpolar substrates, have long service term even in thin layers, with fast development of high early adhesion and preservation of, in particular, good adhesion, mainly when stored at higher temperature and humidity for long period of time.
15 cl, 1 dwg, 2 tbl
