Process for the synthesis of hydroxyl-end group functionalized polybutadienes.

Abstract

The process for the prepn. of an hydroxyl end-group functionalized, linear, non-crosslinked polyolefin without pendant chain branched groups comprises (I) polymg. (A) a cyclic olefin monomer with (B) a chain transfer agent in the presence of (C) a metathesis polymn. catalyst; thereby forming a protected end-group functionalized polyolefin, (II) sapong. the protected end-group functionalized polyolefin by adding (D) a mixt. comprising water and caustic, to the protected end-group functionalized polyolefin to remove the protecting end-groups. Thus, a hydroxyl-terminated polybutadiene was prepd. by polymg. 1,5-cyclooctadiene using 1,4-diacetoxy-2-butene in the presence of bis(tricyclohexylphosphine)benzylidene-ruthenium dichloride, then sapong. in potassium hydroxide soln., and finally neutralizing in sulfuric acid soln. [on SciFinder(R)]