EP 0724605 A1 19960807 - METHOD TO INCREASE THE LEVEL OF -g(a)-GLYCOL IN LIQUID EPOXY RESIN
Title (en)
METHOD TO INCREASE THE LEVEL OF -g(a)-GLYCOL IN LIQUID EPOXY RESIN
Title (de)
VERFAHREN ZUR ERHÖHUNG DES ALPHA-GLYKOLGRUPPENGEHALTS IN FLÜSSIGEN EPOXYDHARZEN
Title (fr)
PROCEDE POUR AUGMENTER LE NIVEAU DE -g(a)-GLYCOL DANS DES RESINES EPOXY LIQUIDES
Publication
Application
Priority
- US 9401502 W 19940214
- US 13866193 A 19931018
Abstract (en)
[origin: WO9511266A1] The performance of expoxy resins in several end-uses is enhanced by the presence of small quantities of hydrolyzed resin terminated by alpha -glycol groups. The invention is a process in which a mixture that contains liquid epoxy resin and water is reacted at elevated temperatures in order to hydrolyze epoxy groups into alpha -glycol groups, characterized in that: (1) the reaction temperature is between 130 DEG C and 200 DEG C; (2) the reaction mixture contains between 0.5 and 10 parts water per 100 parts resin by weight; and (3) the mixture contains 0 to 1 weight percent organic solvents and 0 to 100 ppm each of: organic acids, organic diacids, phosphonium compounds, and alkali or alkaline earth metals and their salts. The process raises the level of alpha -glycol groups in the resin, but uses no solvents or catalysts, so that it is easy to clean up the resulting resin.
IPC 1-7
IPC 8 full level
C08G 59/14 (2006.01)
CPC (source: EP KR US)
C08G 59/14 (2013.01 - KR); C08G 59/1427 (2013.01 - EP US)
Citation (search report)
See references of WO 9511266A1
Designated contracting state (EPC)
CH DE IT LI NL
DOCDB simple family (publication)
WO 9511266 A1 19950427; AU 6298094 A 19950508; BR 9407843 A 19970513; CA 2174427 A1 19950427; EP 0724605 A1 19960807; JP H09503809 A 19970415; KR 960704958 A 19961009; PL 174545 B1 19980831; PL 314007 A1 19960805; TW 293828 B 19961221; US H1439 H 19950502
DOCDB simple family (application)
US 9401502 W 19940214; AU 6298094 A 19940214; BR 9407843 A 19940214; CA 2174427 A 19940214; EP 94910685 A 19940214; JP 51172895 A 19940214; KR 19960701984 A 19960418; PL 31400794 A 19940214; TW 83101285 A 19940217; US 13866193 A 19931018