Cyclopentadienyl and/or dicyclopentadienylene groups- containing polyorganosiloxanes, their preparation and their use in curable elastomeric compositions

摘要

Polyorganosiloxane polymer comprising a polysiloxane (P1) containing, per molecule, at least one unit of formula: …… and/or a polysiloxane (P2) containing, per molecule, at least one unit of formula: …… in which formulae: … …  - X, which are identical or different, denote a hydrolysable group, …  - R<1>, which are identical or different, denote a C1-C10 monovalent hydrocarbon group, …  -Z is a single valency bond or a divalent hydrocarbon group, …  - p = 1 or 2, …  - the polysiloxane (P1) containing, per molecule, at least one unit (1) if a is other than zero and at least two units (1) if a is equal to zero. … …The invention also relates to compositions which are crosslinked by atmospheric oxygen and/or moisture, comprising such polysiloxanes (P1) and/or (P2).