Example 4
As shown in Table 5a herein below, two (2) adhesive formulations (AF5-AF6) were prepared by independently mixing two of the above defined amino functionalized polyesters (Table 1: NH2B, NH2F) with 40 mol. % polyethylenimine (MW 800) and then with a cyclic carbonate functional curing partner (CC-BADGE): said curing partner was obtained by the addition of CO2 to the epoxide compound. The mixtures were prepared at a ratio of [Cyclic Carbonate groups]:[Primary and Secondary Amino groups] of 1:1 and were cured at 130° C. for 20 hours.
Utilizing these adhesive formulations, lap shear tests were performed according to DIN EN 1465 and using the following substrates: ARMS-ARMS; and, Beech Wood-Beech Wood. The results of the tests performed at room temperature are shown in Table 5b herein below, wherein: SF means substrate failure; AF means adhesive failure; CF means cohesive failure; and, NM means not measured.
