Formaldehyde → Resorcinol-formaldehyde resin
Reaktionsgleichung
[C:1]1([CH:8]=[CH:7][CH:6]=[C:4]([OH:5])[CH:3]=1)[OH:2].[CH2:9]=[O:10]>O>[C:1]1([CH:8]=[CH:7][CH:6]=[C:4]([OH:5])[CH:3]=1)[OH:2].[CH2:9]=[O:10]Komponenten
4
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
Into a 500 ml flask are charged resorcinol (110 g, 1.0 mol) and 37% formalin (44.5 g), and the mixture is reacted at 70° C. for 5 hours. After the reaction, water is distilled off at 150° C. under reduced pressure (inner pressure: 25 mmHg) to give a resorcinol/formaldehyde resin having a softening point of 98° C. (Resin X).
Aufarbeitung
- customthe mixture is reacted at 70° C. for 5 hours
- distillationis distilled off at 150° C. under reduced pressure (inner pressure: 25 mmHg)
Quellen und Nachweise
- ORD-Eintrag
- ord-bd5b7fdfa81e4547860d529cfbdcef54
- Quelldatensatz
- uspto-grants-1981_03
- Patentnummer
- US04257926
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