| abstract |
The invention relates to an ≡SiH/≡SiOH silicone composition polymerizable/crosslinkable by dehydrogenating condensation in the presence of a catalyst judiciously selected to achieve at least one of the specifications listed hereafter: kinetics, concentration/efficacy ratio of the catalyst, cost, lowering of the catalyst activation temperature (room temperature), control of the release of gaseous hydrogen and the quality of the polymerized product and the crosslinked network, and finally limitation of the secondary reactions. n This composition comprises: n o -A- at least one ≡SiH POS; o -B- at least one ≡SiOH POS; o -C- at least one metal catalyst selected from the group of organometallic complexes comprising at least one of the following metals: Ir, Ru, Mn; o -D- optionally at least one crosslinking inhibitor; o -E- optionally at least one POS resin; and o -F- optionally at least one filler. n n The invention further relates to the catalyst —C— and to the processes which involve the crosslinking of silicone bydehydrogenating condensation (non-stick coating on paper). |