Patent ID: 7132269

Claim:
Coupling agent having the following general formula: in which: Z represents —NH—(CH 2 ) 2 —O—(CH 2 ) 2 —O—CH 2 —C(O)— A represents a group chosen from among: B represents a group chosen from among: wherein B or B and A are present, Y represents a group ending in —C(O)—NH 2 and which is inert with respect to the aminooxyalkylene function, the maleimide group or groups of B and A and which is inert with respect to —(CH 2 ) 2 —O—(CH 2 ) 2 —O—CH 2 — of Z, Z′ represents —C(O)—CH 2 —O—(CH 2 ) 2 —O—(CH 2 ) 2 —NH—, n is an integer lying between 0 and 3, m is an integer lying between 1 and 3, o is an integer lying between 1 and 3, p and p1 to p7 are each independently an integer lying between 1 and 4, q and q1 are each independently an integer lying between 0 and 3, r and r1 to r5 are each independently an integer lying between 2 and 5, s is an integer of 0 or 1, t is an integer lying between 1 and 7, and u and u1 to u4 are each independently an integer lying between 2 and 10.