Hydrogen-containing silicone resin as the crosslinking agent of heat-curable silicone rubber

The hydrosilation-cured vulcanizates (HCV) of silicone rubber were prepared by using hydrogen-containing silicone resin (HSR) as the crosslinking agent. The influences of both the amount and structure of HSR on hydrosilation-curing silicone rubber (HCSR) were discussed. The results indicate that HSR is a good crosslinking agent for HCSR. The tensile strength, tearing strength, elongation at break, and hardness of the vulcanizates can reach 9.6 MPa, 37.8 kN/m, 870% and 56 SHA, respectively. The aging stability of the vulcanizates can be improved greatly. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 3066–3069, 2003