Formaldehyde → Resorcinol-formaldehyde resin
Reaction equation
[OH-].[Na+].[C:3]1([CH:10]=[CH:9][CH:8]=[C:6]([OH:7])[CH:5]=1)[OH:4].C=O>>[C:3]1([CH:10]=[CH:9][CH:8]=[C:6]([OH:7])[CH:5]=1)[OH:4].[CH2:3]=[O:4]Participants
Procedure
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##
Workup
- customto react at 20° C. for 20 hours
Sources & evidence
- ORD record
- ord-4aef16fa4ae743deb1f8de25ef7bd80b
- Source dataset
- uspto-grants-1998_12
- Patent number
- US05847033
Reaction notes
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