Adhesive systems using imines and salts thereof, precursors to electron deficient olefins and coreactants therefor

An adhesive system comprising:

• (a) an iminium salt within structure II:
• wherein K+ is
• wherein R1-R2 are each independently selected from the group consisting of hydrogen, alkenyl, and alkynyl;
• and A-B are each independently selected from the group consisting of linear, branched, or cyclic alkyl or alkenyl which may be interrupted with heteroatoms or substituted by functional groups, or A and B taken together form a cyclic or polycyclic alkyl or alkenyl structure, which may be interrupted with heteroatoms or substituted by functional groups;
• E is selected from the group consisting of a linear, branched or cyclic hydrocarbon with or without one or more nitrogen-containing substituents thereon, a heterocyclic, an aromatic and an organosiloxane group or part thereof or linkage;
• and
• R3 is selected from the group consisting of a hydrocarbon, a heterocyclic, an aromatic or an organosiloxane group or linkage;
• wherein when more than one of K, E or R3 are present, each instance thereof is defined independently from the other instance(s);
• w is 1-100;
• y is 1-100 and z is 0-100;
• and
• X is an anion;
• (b) a compound containing at least one methylene linkage having at least one electron withdrawing substituent attached thereto, wherein the electron withdrawing substituent is selected from the group consisting of nitrile, carboxylic acids, carboxylic esters, sulphonic acids, ketones and nitro;
• and
• (c) a compound bearing at least one functional group reactive with either:
• the compound containing at least one methylene linkage having at least one electron withdrawing substituent attached thereto from (b) or
• a product of the reaction of the iminium salt from (a) with the compound containing at least one methylene linkage having at least one electron withdrawing substituent attached thereto from (b).