Abstract
Kinetic viscosity curves η(t) for solutions of a mixture of epoxy-4,4'-isopropylidenediphenol and phenol-formaldehyde resins in Cellosolve at 333 K were studied. The optimal precondensation time t was determined for the oligomer mixture in solution in the presence of orthophosphoric acid.
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Krasovskii, A.N., Filippov, V.N. Precondensation of a Mixture of Epoxy-4,4'-Isopropylidenediphenol and Phenol-Formaldehyde Oligomers in Solution. Russian Journal of Applied Chemistry 76, 972–977 (2003). https://doi.org/10.1023/A:1026348615088
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DOI: https://doi.org/10.1023/A:1026348615088