Copper chlorides as accelerators of copolymerization reaction of unsaturated polyester with styrene
Cuprous chloride and cupric chloride have been used instead of cobalt nsphthenate for accelerating the copolymerization reaction of an unsaturated polyester [poly(propylene maleinate-phthalate)] with styrene at room temperature in the presence of hydroperoxides of cyclohexanone, methylethylketone or cumene. The tim of gelation, maximum temperature and rate of temperature increase during copolymerization have been determined. Both copper chlorides were efficient copolymerization accelerators in the presence of N,N' -dimethylaniline as a promoter. Acetylacetone was inactive as a copolymerization promoter of polyester copolymerization with styrene in the presence of copper chlorides. Copper chlorides do not change the mechanical and thermal properties of cured polyester compositions.
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