Studies On The Modification Of DADGEBA With Organosilicon By Hydrosilylation And Properties Of Its Products

It is of great significance to modify epoxy resins with organosilicon. Hydrosilylation is used to link allyl - containing epoxy resin and hydrogen-containing organosilicon without reducing epoxy value and forming silicon - oxygen - carbon bond. The resultant epoxy - organosilicon hybrid has high crosslinking density and hydrolyzing stability.In this paper, 4,4-diallyl bisphenol A was utilized to synthesize diallyl-containing epoxy resin, then trimethoxylsilane and allyl-containing epoxy resin were reacted via hydrosilylation to obtain a novel siliconized epoxy resin (SEP). FTIR and NMR were adopted to characterize the structure of SEP. Epoxy value and molecular weight were tested by hydrochloric acid -acetone and GPC method. Epoxy group reaction curing and moisture-curing were studied and mechanical properties and blending properties were tested as well.Results showed that SEP were synthesized by hydrosilylation of allyl-containing epoxy resin and trimethoxylsilane. The ratio of 1-location addition product and 2-location addition product was 6.44 to 1. The molecular...