Minotelechelic oligomers of partially hydrogenated 1,3 diene and method of preparing these compounds

Abstract From the Canadian patent

he invention centres on compounds corresponding to the formula P (ACH2NH2)x in which P represents an oligomer group of partially hydrogentated 1,3-diene x is almost equal to 2, A represents a divalent group such as (see Fig. I) or (see Fig. II). These compounds are obtained by selective hydrogenation of compounds of the formula P1 (ACN)x in which P represents an oligomer group of 1,3-diene. They offer the advantage of being liquid at a low viscosity and light-coloured. The compounds can be used in synthesizing block copolymers and polyureas and in polyurethane formulations as an "activator" for the reactivity of hydroxyl-terminated polybutadienes.