| 主权项 |
1. A method for the preparation of a silicone composition, the method comprising:
combining
Component (A), at least one organopolysiloxane having an average of at least two free radical polymerizable groups per molecule, the organopolysiloxane having the structure:
R13SiO(R12SiO)a(R1R2SiO)bSiR13 or R32R4SiO(R32SiO)c(R3R4SiO)dSiR32R4,wherein
at each occurrence R1 and R3 are independently chosen from halogen and a monovalent organic group,at each occurrence R2 and R4 are independently a monovalent unsaturated organic group,a, c, and d are independently about 0 to about 20,000, and b is about 1 to about 20,000,Component (B), at least one organoborane free radical initiator, andComponent (C), at least one fluid miscible with Component (A), to form a reaction mixture, wherein Component (B) is the only catalyst present in the reaction mixture; and gelling the reaction mixture to form a substantially homogeneous swollen silicone gel, the gelling comprising
polymerizing Component (A) in the presence of Component (B), Component (C), and oxygen, while maintaining a temperature of from about 5° C. to about 95° C., to form the substantially homogeneous swollen silicone gel, wherein about 50 wt % to about 90 wt % of the substantially homogeneously swollen silicone gel is Component (C). |
