Preparation of aminopropyl polysiloxane-based heat-curable silicons rubber

By using polysiloxane containing aminopropyl groups as a base gum and polys iloxane containing epoxy groups as a crosslinker, we prepared a new type of addition-curable silicone rubber and investigated in detail the effect of various factors on the silicone rubber. Better technical conditions were de termined and the vulcanizates with fine mechanical properties were obtained . The tensile strength, tear strength, elongation at break, and hardness of the vulcanizates reach 8.1 MPa, 19.4 kN/m, 420%, and 64 ShA, respectively. To analyze the crosslinking statue, we measured their crosslinking density by toluene-swelling methods. (C) 2001 John Wiley & Sons, Inc.