| 摘要 |
<p>A two part adhesive for a silicone rubber which cures by addition reaction is provided. This adhesive containing a calcium carbonate powder cures by hydrosilylation, and this adhesive experiences reduced viscosity change in the long term storage. Accordingly, this adhesive can be homogeneously mixed to realize the designed physical properties of the silicone rubber as well as good adhesion to the silicone rubber. This adhesive contains (A) an alkenyl group-containing diorganopolysiloxane; (B) an organohydrogenpolysiloxane; (C) a calcium carbonate powder having its surface treated with a paraffin compound; (D) an inorganic powder of a member selected from quartz, aluminum hydroxide, diatomaceous earth, alumina, titanium dioxide, zinc oxide, iron oxide, magnesium carbonate, and carbon black; and (E) a hydrosilylation catalyst. Of the two parts, the composition (I) contains the components (A), (C), (E), and optionally (D) without (B), and the composition (II) contains the components (A), (B), and (D) without (C) and (E), and these compositions (I) and (II) cures when they are mixed at room temperature.</p> |
