Modified phenolic novolak resins and applications thereof

A modified phenolic novolak resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aliphatic polyol. The reaction mixture further reacts with a formaldehyde to produce a modified phenolic novolak resin. The reaction is typically carried out in the presence of an acid or a base...

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Bibliographische Detailangaben
1. Verfasser:	DURAIRAJ RAJ B.,WALKUP MICHAEL C.,LAWRENCE MARK A
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	A modified phenolic novolak resin is prepared by reacting a phenolic compound (e.g., resorcinol) with an aliphatic polyol. The reaction mixture further reacts with a formaldehyde to produce a modified phenolic novolak resin. The reaction is typically carried out in the presence of an acid or a base catalyst. The resulting resin is characterized by a relatively low level of free resorcinol; and rubber compounds containing the resin exhibit low fuming, lower Mooney viscosity (which means better processing), better dynamic stiffness properties (G'), and/or good tear properties. Therefore, the resulting resin can be used as a methylene acceptor compound in a vulcanizable rubber composition.