Method of gluing two objects, comprising forming a two-component system for a thermoplastic cross-linking adhesive, comprising:
- (A) a first composition not containing any anhydride groups and comprising per 100 parts per weight of said first composition:
- (a) from 25 to 60 parts by weight of at least one polymer chosen from thermoplastic polymers and synthetic rubbers;
- (b) from 1 to 20 parts by weight of at least one compound containing at least one group capable of reacting with anhydride groups;
- and
- (c) from 5 to 60 parts by weight of at least one tackifying resin;
- (B) a second composition containing per 100 parts per weight of said second composition:
- (a) from 50 to 30 parts by weight of at least one polymer chosen from thermoplastic polymers and synthetic rubbers;
- (b) from 20 to 60 parts by weight of at least one compound containing at least one anhydride group;
- and
- (c) from 5 to 60 parts by weight of at least one tackifying resin;
- (C) at least one activator of the reaction between the reactive groups of the constituent Ab and the anhydride functions of the constituent Bb;
- wherein the molar ratio of the reactive groups of the constituent Ab to the anhydride groups of the constituent Bb is at least equal to 1, and the molar ratio of the activator C to the anhydride groups of the constituent Bb is at least equal to 0.5;
- wherein the thermoplastic polymers included in the definition of the constituents Aa and Ba are chosen from the group consisting of C.sub.2 -C.sub.12 alkene/C.sub.1 -C.sub.12 -alkyl (meth) acrylate copolymers, and the polymers of norbornene and/or of its derivatives;
- wherein the synthetic rubbers included in the definition of the constituents Aa and Ba are chosen from styrene-diene-styrene block copolymers;
- wherein the tackifying resins Ac and Bc are chosen from polyterpenes, colophonies and colophony esters as well as their hydrogenated derivatives, and petroleum resins;
- wherein the activator C is chosen from tertiary amines, phosphines, aryl or alkyl phosphonium halides and the tertiary amides of fatty acids;
- wherein the activator C is wholly incorporated in the composition A and/or B so as to form the two-component system, brought to a temperature lying between 120.degree. and 220.degree. C. and then:
- either intimately mixed at that temperature, and the resulting thermoplastic adhesive is applied to at least one of the two objects to be glued, and finally one of the glued objects is applied against the other,
- or the two components are separately applied either one after the other onto one of the two objects to be glued, or one on one object to be glued and the other on the other object to be glued, and said objects are then applied one against the other.