| 摘要 |
<p>Curable, storage-stable liquid organopolysiloxane compositions are formulated by [A] admixing (a) a diorganopolysiloxane oil having a viscosity ranging from between 400 and 3,000 cps at 25 DEG C., said diorganopolysiloxane being terminated at its chain ends with a moiety selected from the group consisting of (CH3)3SiO0.5, (CH3)2CH2=CHSiO0.5 and (CH3)2C6H5SiO0.5, and the organo radicals comprising the said diorganopolysiloxane being selected from the group consisting of methyl, vinyl and phenyl, with (b) silica having a specific surface area in excess of 80 m2/g, (c) water, and (d) a Si-N bonded silylating agent; [B] next devolatilizing the mixtures [A]; and thence [C] admixing with the devolatilized product [B], (e) an alpha , omega -dihydroxypolysiloxane oil having a viscosity ranging from between 2,000 and 60,000 cps at 25 DEG C. and (f) an inorganic filler. Organopolysiloxane elastomers useful as molding compositions are prepared by curing the aforesaid formulations.</p> |
