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26022-00-4[CH]Oc1cccc([CH])c1OSLGWESQGEUXWJQ-UHFFFAOYSA-N26022-00-4、9003-35-4Sicherheitsangaben dienen nur zur Orientierung und ersetzen weder das Sicherheitsdatenblatt (SDB) des Lieferanten noch geltende Vorschriften oder eine fachliche Bewertung.
VerwendenPhenol-formaldehyde resin is used in binders, adhesives, laminates, impregnation products, surface coatings, casting sand, etc.
synthetischePhenol-formaldehyde resin is prepared as follows: C6H5OH+H2C=O ---> [-C6H2(OH)CH2-]n One-Stage Resins. The ratio of formaldehyde to phenol is high enough to allow the thermosetting process to take place without the addition of other sources of cross-links. Two-Stage Resins. The ratio of formaldehyde to phenol is low enough to prevent the thermosetting reaction from occurring during manufacture of the resin. At this point the resin is termed novolac resin. Subsequently, hexamethylenetetramine is incorporated into the material to act as a source of chemical cross-links during the molding operation (and conversion to the thermoset or cured state).
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