| 摘要 |
HEAT CURABLE SILICONE-POLYIMIDE BLOCK COPOLYMERS Heat curable siloxane-imide block copolymer compositions are provided based on the use of an organic peroxide and a siloxane imide block copolymer containing norbornane siloxy imide functional groups. A hydrosilyl terminated norbornane oligomide is employed with polydiorganosiloxane having olefinic unsaturation, or silicon hydride functional groups to make siloxane-imide block copolymers which can be further blended with additional polydiorganosiloxane along with effective amounts of free radical initiators. The resulting silicon elastomers have improved toughness compared to conventional heat cured polydiorganosiloxanes. |
