| abstract |
Rubber-modified rigid silicone resins and methodnof producing are disclosed and claimed herein. These resinsnare the copolymerized reaction product of (A) annorganosilicon composition selected from the group consistingn(I) an organosilicone resin, (II) hydrolyzable precursors ofn(I), and hydrolyzate(s) of (II) and (B) a silicone rubber.nThe resulting rubber-modified rigid silicone resins of ourninvention show remarkably high fracture toughness, K Ic andncritical strain energy release rate G Ic . |