Abstract

The influence of various basic factors regarding the viscosity and bonding strength of phenol-, melamine and ureaformaldehyde resins was investigated. Summarizing the results revealed some important conclusions contributing considerably to the knowledge of rheologic behaviour of synthetic resins. Remarkable is, that the influence by the aging of the resin improves decisively the bonding strength of an inert glue, while adding, strong acids to the cold curing synthetic resin causes an remarkable reduction of the bonding strength.

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