Patent ID: 8535798

Claim:
A heat-curable adhesive composition comprising: from 20 to 85% of a polyurethane comprising 2 hydrolyzable alkoxysilane end groups and of formula (I): in which: R 1 represents a hydrocarbon-based divalent radical comprising from 5 to 15 carbon atoms which may be aromatic or aliphatic, linear, branched or cyclic; R 2 represents a linear or branched alkylene divalent radical comprising from 1 to 4 carbon atoms; R 3 represents a linear alkylene divalent radical comprising from 1 to 3 carbon atoms; R 4 and R 5 , which are identical or different, each represent a linear or branched alkyl radical having 1 to 4 carbon atoms, with the possibility, when there are several R 4 or R 5 radicals, that these are identical or different; n is an integer such that the number-average molecular weight of the polyether block of formula —[OR 2 ] n — is between 300 Da and 30 kDa; m is an integer such that the number-average molecular weight of the polymer of formula (I) is between 600 Da and 60 kDa; p is an integer equal to 0, 1 or 2; from 15 to 80% of a compatible tackifying resin, having a number-average molecular weight between 200 Da and 5 kDa, that is a resin obtained: (i) by polymerization of terpene hydrocarbons and of phenols, in the presence of Friedel-Crafts catalysts; or (ii) by polymerization of α-methylstyrene, and optionally by reaction with phenols; and from 0.01 to 3% of a curing catalyst.