| 摘要 |
A curable compsn. exhibiting cure inhibition in the absence of oxygen comprises: (A) a first cpd. contg. at least two ethylenically unsatd. or acetylenically unsatd. gps. per mol.; (B) a second cpd. contg. at least two silicon-bonded hydrogen atoms per mol. in an amt. sufficient to cure the compsn. in the presence of an active hydrosilation catalyst; and (C) an anaerobically inhibited hydrosilation catalyst contg. a platinum gp. metal in an amt. sufficient to promote curing of the compsn. in the presence of oxygen. Also claimed is the prepn. of an anaerobically stable organosiloxane compsn. that cures in the presence of oxygen by blending (A), (B) and (C) in the absence of oxygen and storing the resulting compsn. in the absence of oxygen. Pref. the anaerobically inhibited catalyst is a reaction product of: (1) an anaerobically active hydrosilation catalyst selected from platinum gp. metals and cpds. of these; and (2) at least one organosilicon cpd. selected from organohydrogensilanes contg. up to three silicon-bonded H atoms per mol., organohydrogendisiloxanes, organohydrogenpolysilanes, and organohydrogenpolysiloxanes. |
