Associative and exchangeable oligomers, and composition comprising them

A composition resulting from the mixing of at least

• a polydiol oligomer A1 with a number-average molar mass of greater than or equal to 600 g/mol and less than 10 000 g/mol, comprising repeating units corresponding to:
• at least two monomers M1,
• and
• at least one monomer M2, or
• at least one monomer M3, or
• at least one monomer M2 and at least one monomer M3,
• and the oligomer A1 comprises less than 2 mol % of repeating units corresponding to one or more monomers M3,
• and
• a compound A2 comprising at least two boronic ester functions,
• the monomer M1 corresponding to the general formula (I):
• in which:
• R1 is chosen from the group formed by —H, —CH3 and —CH2—CH3;
• x is an integer ranging from 1 to 18
• y is an integer equal to 0 or 1;
• X1 and X2, which may be identical or different, are chosen from the group formed by hydrogen, tetrahydropyranyl, methyloxymethyl, tert-butyl, benzyl, trimethylsilyl and t-butyldimethylsilyl;
• or
• X1 and X2 form, with the oxygen atoms, a bridge having the following formula
• in which:
• the asterisks (*) symbolize the bonds to oxygen atoms,
• R′2 and R″2, which may be identical or different, are chosen from the group formed by hydrogen and a C1-C11 alkyl;
• or
• X1 and X2 form, with the oxygen atoms, a boronic ester having the following formula:
• in which:
• the asterisks (*) symbolize the bonds to oxygen atoms,
• R′″2 is chosen from the group formed by a C6-C30 aryl, a C7-C30 aralkyl and a C2-C30 alkyl;
• the monomer M2 corresponding to the general formula (II):
• in which:
• R2 is chosen from the group formed by —H, —CH3 and —CH2—CH3;
• R3 is chosen from the group formed by:
• —C(O)—O—R′3;
• —O—R′3;
• —S—R′3 and —C(O)—N(H)—R′3 with R′3 a C1-C30 alkyl group,
• the monomer M3 corresponding to the general formula (X):
• in which:
• Z1, Z2 and Z3, which may be identical or different, represent groups chosen from a hydrogen atom, a C1-C12 alkyl, and a group —OZ′ or —C(O)—O—Z′ with Z′ being a C1-C12 alkyl.