Patent ID: 8524842
Filing Date: 2013-09-03
Classification: C08G,C08L,C09J,H01L

Abstract:
1. A silicone composition comprising: (A) at least one polyorganosiloxane POS (I) having: with the proviso that the polyorganosiloxane POS (I) comprises at least two SiH radicals per molecule; (B) at least one polyorganosiloxane POS (II) having: with the proviso that the polyorganosiloxane POS (II) comprises at least two X radicals per molecule; (C) at least one monofunctional polyorganosiloxane POS (III) which is essentially linear, having less than 2 mol % of siloxyl unit T=RSiO (D) an effective amount of at least one hydrosilylation reaction catalyst; and (E) at least one nonfunctionalized polyorganosiloxane POS (IV) having: with the proviso that the amount of the constituents (A), (B), (C) and (E) is such that the molar ratio r of the hydrogen atoms bonded to silicon to the alkenyl radicals (X) bonded to silicon is 1:1; wherein the composition is crosslinkable into a gel by hydrosilylation and said composition, upon crosslinking, has a viscous modulus, (G″) and an elastic modulus (G′) greater than a comparable composition lacking component (C), POS (III).