Patent ID: 9102040
Filing Date: 2015-08-11
Classification: B24D,C08G,C09G

Abstract:
1. A process for the manufacture of an aqueous resin composition comprising a phenolic formaldehyde resin, which process comprises the steps of a. providing a formaldehyde and phenolic compound, b. reacting said compounds in a condensation reaction in the presence of a catalyst, c. after completion of the condensation reaction to react with free formaldehyde, determining the free formaldehyde content of the resin composition, d. adding a pre-calculated substantially stoichiometric amount of modifying compound, wherein the modifying compound is hydroxylamine and is present in an amount between 0.1 and 10 wt % relative to the total weight of the aqueous resin composition, or wherein the modifying compound is glycine and is present in an amount between 0.1 and 5.0 wt % relative to the total weight of the aqueous resin composition, and e. optionally distillation of the reaction product.