FIELD: chemistry.
SUBSTANCE: present invention relates to a single-component moisture-curable composition for producing adhesives, sealants and coatings. The composition contains: (a) at least one polyisocyanate P; (b) at least one aldimine A of formula 
(I), wherein n equals 2, 3 or 4, E denotes an organic residue of an n-atom amine B after removing n primary amino groups, and Y denotes a univalent hydrocarbon residue with 1-35 C atoms, which optionally contains at least one heteroatom; (c) at least one organoalkoxysiloxane OS, having at least moiety of formula 
(VI), wherein a equals 0, 1 or 2, preferably 0 or 1, R7 denotes an alkyl residue with 1-5 C atoms, particularly a methyl or ethyl residue, R8 denotes an alkyl residue with 1-8 C atoms, particularly a methyl residue, and X denotes an oxygen atom or a substituted nitrogen atom; (d) at least one acid S; provided that in composition (i) the ratio V1 of the number of aldimine groups to the number of isocyanate groups is in the range from 0.2 to 0.8, and (ii) the ratio V2 of the number of alkoxy groups of the organoalkoxysilane OS to the number of isocyanate groups is in the range from 0.1 to 0.5. The invention also describes a method of attaching a base S1 to a base S2 and a sealing method, carried out using said composition, as well as an anisotropic composition and isotropic compositions obtained by curing the composition described above.
EFFECT: obtaining a polyurethane composition which hardens without bubbles and has a substantially non-sticky surface after hardening, as well as low values of 100% tensile stress and high strain relief capacity.
16 cl, 2 tbl, 8 ex
