Method for producing resols
AssigneeBakelite AG
InventorsWilli Roll, Axel Bottcher, Walter Napp, Peter Fricke
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Abstract
The invention relates to a process for the preparation of resols by reacting phenolic compounds with aldehydes with catalysis by metal salts whose cation can easily be precipitated as low-solubility salts in industrial processes. In this process, a dispersant is added to the reaction mixture comprising phenolic compound, aldehyde and metal salt before, during or after the condensation reaction, and a complexing agent is admixed after the condensation reaction is complete and after the dispersant has been admixed. The resultant resins are transparent even after neutralization using sulphuric acid.
Claims10
Process for the preparation of resols by reacting phenolic compounds with aldehydes with catalysis by metal salts whose cations, can easily be precipitated as low-solubility salts in industrial processes, characterized in that a dispersant is added to the reaction mixture comprising phenolic compound, aldehyde and metal salt before, during or after the condensation reaction, and a complexing agent is admixed after the condensation reaction is complete and after the dispersants has been admixed.
Dependencies are inferred from the claim text.