INFLUENCE OF CROSS-LINKING DEGREE OF SILICONE-RUBBER PARTICLES ON PROPERTIES OF EPOXY-RESIN

Silicone rubber particles with different degrees of crosslinking were prepared. Silicone oils containing Si-H groups and vinyl groups were r eacted at various mol ratios in their composite emulsions. Epoxy resin was modified using these particles and the results indicated that the content of the silicone rubber particles, the crosslinking degree of the rubber particles, and the addition of a coupling agent affected th e properties of the modified epoxy resins. The influence of the coupli ng agent depends on the crosslinking degree of the silicone rubber par ticles. (C) 1998 John Wiley & Sons, Inc.