| 主权项 |
1. Self-adhesive article comprising a support layer coated with an adhesive layer, said support layer having an elongation at break ranging from 50 to 1200% and a bulk density ranging from 25 to 1200 kg/m3, said adhesive layer is obtained by cross-linking an adhesive composition comprising:
a) at least one polymer or a mixture of polymers having at least 20% of dialkoxylated silyl functions, with respect to the total quantity of silyl functions in the polymer or the mixture of polymers, and comprising at least 20% by weight, with respect to the total weight of the mixture of polymers, of at least one polyurethane or at least one polyether comprising two or three hydrolyzable terminal groups of dialkoxysilane type and corresponding to formula (II):in formula (II) above,
B represents one of the two formulae below: where D and T represent a hydrocarbon radical comprising 2 to 66 carbon atoms, linear, branched, cyclic, alicyclic or aromatic, saturated or unsaturated, optionally comprising one or more heteroatoms, R1 represents a divalent hydrocarbon radical comprising 5 to 15 carbon atoms which can be aromatic or aliphatic, linear, branched or cyclic, R3 represents a linear or branched divalent alkylene radical comprising 1 to 6 carbon atoms, R2 represents a linear or branched divalent alkylene radical comprising 2 to 4 carbon atoms, R4 and R5, identical or different, each represent a linear or branched alkyl radical comprising 1 to 4 carbon atoms, R4 optionally being able to be part of a ring, n is an integer such that the average molar mass of the polyether block of formula —[OR2]n— ranges from 300 g/mol to 40000 g/mol, m is an integer such that the average molar mass of the polymer ranges from 600 g/mol to 100000 g/mol, f is an integer equal to 2 or 3; b) at least one tackifier resin, and c) at least one cross-linking catalyst. |
