Patent ID: 7875686

Claim:
An encapsulant formulation comprising cycloolefin monomers in the amount of from 60 to 98 wt. %, said monomers in the amount of 20 to 92 wt. % of a cycloolefin monomer of Formula I(a); 5 to 50 wt. % of a cycloolefin monomer of Formula I(b) and 1-50 wt. % of a cycloolefin monomer of Formula I(c) where X is —CH 2 —; n is 0; and one of R 1 to R 4 is a pendant linear C 8 to C 12 alkyl substituent and the remaining R 1 to R 4 are hydrogen; where X and n are as defined above and one R 5 to R 8 is a pendant silyl group of the formula: —(CH 2 ) m —Si(R 13 )(R 14 )(R 15 ) where m is an integer from 0 to 6, R 13 , R 14 and R 15 are each methoxy or ethoxy, and the remaining R 5 to R 6 is independently selected from hydrogen, C 1 -C 3 alkyl and linear or branched C 1 -C 5 alkoxy; where X, m and n are as defined previously and one of R 9 to R 12 is phenethyl or: and the remaining of R 9 to R 12 are hydrogen, said composition further comprising; 0.008 to 0.2 wt. % of an addition polymerization procatalyst; 0 to 0.25 wt.% of a cocatalyst; 0 to 45 wt. % of a crosslinking monomer; 0 to 50 wt. % of a norbornene polymer viscosifier; 0 to 50 wt % of a silica viscosifier; 0 to 20 wt. % of a thixotropic additive; 0 to 1.5 wt. % of an antioxidant; and 0 to 0.6 wt. % of an antioxidant synergist; with the proviso that at least one of a norbomene polymer viscosifier, a silica viscosifier or a thixotropic additive is present and that the total of the components of the formulation add up to 100%.