| 摘要 |
<p>Provided are a silicon-based polymer used as a sealant, a polymer composition containing the polymer, a prepolymer mixture, and a light emitting device containing the polymer composition. The silicon-based polymer is prepared by reacting a vinyl siloxane oligomer represented by R_n SiO_(4-n)/2 and an acyclic hydrogen siloxane oligomer represented by R^1_n SiO_(4-n)/2 in the presence of a hydrosilation catalyst, wherein 2<=n<=3; R is independently CH3, OCH3, OCH2CH3 or a vinyl group but at least two R is a vinyl group; R^1 is independently H, an alkyl group or a haloalkyl group but at least two R^1 is H; the number of Si atoms of the vinyl siloxane oligomer is less than 310; the vinyl siloxane oligomer has a viscosity of 10-10,000 cP at 25 deg.C; and the acyclic hydrogen siloxane oligomer has a viscosity of 10-10,000 cP at 25 deg.C.</p> |
