Method of preparing a higher solids phenolic resin

   
   

A phenol-formaldehyde resole resin for use as a binder for glass fibers is acidified with sulfamic acid to a pH of 3 or less after base-catalyzed resinification. An increase in actual solids observed compared with neutralized resin, reflecting a desired improvement in efficiency.

Una resina del resole della fenolo-formaldeide per uso come raccoglitore per le fibre di vetro รจ acidificata con acido solfammico ad un pH di 3 o di meno dopo la resinificazione base-catalizzata. Un aumento in solidi reali ha osservato rispetto a resina neutralizzata, riflettente un miglioramento voluto nell'efficienza.

 
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