Hydrocarbons polymers has alkoxysilane end group

Polymer of formula (1) alkoxysilane-terminated: (1) where: - is a double or single bond; - Each of R2, R3, R4 and R5 is H, halogen, alkoxycarbonyl or alkyl, - m and p are each from 0 to 5, - each of R and R 'is alkyl, - Z is an alkylene, uninterrupted or interrupted by COO, - q is 0 or 1, - r is 0, 1 or 2, and - n is such that the average molar mass of the polymer (1) is 400 to 50 000 g / mol and polydispersity of the polymer (1) ranges from 1.0 to 2.0. Prepared by ring-opening metathesis polymerisation. Use as adhesion promoter or reactive plasticizer.