SYNTHESIS OF PHENOLIC RESIN

PROBLEM TO BE SOLVED: To obtain a phenolic resin within a short time without using any organic solvent by reacting a phenol with an aldehyde in the absence of a catalyst in supercritical water. SOLUTION: It is desirable that the reaction time in reacting a phenol with an aldehyde is within 10 min. I...

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Bibliographische Detailangaben
1. Verfasser:	HORIE YASUHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOSITIONS BASED THEREON GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a phenolic resin within a short time without using any organic solvent by reacting a phenol with an aldehyde in the absence of a catalyst in supercritical water. SOLUTION: It is desirable that the reaction time in reacting a phenol with an aldehyde is within 10 min. It is desirable that the phenol is at least one member selected from phenol, cresol, xylenol, resorcinol, dihydroxydiphenylmethane, and 2,2-bishydroxyphenylpropane, and the aldehyde is at least one member selected from formalin, paraformaldehyde, acetaldehyde, and benzaldehyde. It is desirable that the reaction is carried out under conditions including a temperature of 374-600 deg.C and a pressure of 22-80 MPa. The molar ratio of the phenol to the aldehyde in the reaction is desirably in the range of 0.1-1.0. The molar ratio of the phenol to the water that are fed is desirably in the range of 0.01-1.0. In this way, the degree of polymerization of the resin can be increased without causing its gelation.