Formaldehyde → Resorcinol-formaldehyde resin

Participants

Reaction Steps

First, 1.2 g of a 10% aqueous sodium hydroxide solution, and 4.5 g of resorcinol and 6.6 g of formalin (37% aqueous solution) were added and stirred. The solution was then allowed to react at 20° C. for 20 hours to provide an aqueous solution of a resorcin-formaldehyde resin. This aqueous solution, M-NBR latex (Zettpole 2020, 90% hydrogenated, solid content 40%, a product of Nippon Zeon K.K.), water and an ethyleneurea compound (FS50, solid content 27.5%, a product of Meisei Kagaku Kogyo K.K.; hereinafter called the "ethyleneurea compound 1") were added in the respective amounts tabulated in Table 1, were left standing at room temperature for 3 days, and were thereafter heat-treated to form films and to provide samples 1 to 8. ##STR5##

Provenance & Evidence