| abstract |
The present invention relates to silylated polyurethanes obtainable by reaction of at least one polyol, of at least one polyisocyanate, with at least one silicon heterocycle of general formula (I): (I), where R 1 represents an atom hydrogen; each of the radicals R 2 and R 3 is the same or different and is selected, independently of the others, from a linear or branched, substituted or unsubstituted C 1 -C 20 alkyl group or a C 6 -C 18 aryl residue which may be interrupted by at least one heroatom R 4 is selected from a linear or branched, substituted or unsubstituted C 1 -C 20 alkylene residue which may be interrupted by at least one heroatom; each of R 5 and R 6 is the same or different and is independently selected from the group consisting of hydrogen, linear or branched, substituted or unsubstituted C 1 -C 20 alkyl or a C 6 -C 18 aryl group which may be interrupted by at least one heroatom, and a C 4 -C 8 cycloalkyl group, or R 5 and R 6 may form a ring, preferentially a 4 to 8-membered alkyl ring; ; and n is 0, 1 or 2, processes for their preparation, curable compositions comprising the silylated polyurethanes, and their use as an adhesive, sealant, spray foam and / or coating. |