| 摘要 |
Compositions stable in the absence of oxygen are formed by mixing the following substantially in the absence of oxygen (A) mercapto-functional organosiloxanes containing at least two mercapto groups per molecule, (B) optionally, a filler, and (C) a catalytic amount of a cobaltocene of the formula (R3C5H4)Co(C5H4R4), wherein each R3 and R4 is hydrogen or methyl, preferably, 0.01-6 parts by weight of (C5H5)2Co per 100 parts by weight of (A) above. The compositions polymerize or cure upon exposure to oxygen. By utilizing various types and amounts of mercapto-functional organosiloxanes, higher molecular weight products useful as encapsulating gels, coating resins, or elastomeric sealants can be obtained by the method of exposing the compositions of the present invention to oxygen.
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