Curing polyepoxides with mixed catalysts
Abstract
Abstract LIQUID POLYEPOXIDES OR SOLVENT SOLUTIONS OF SOLID POLYEPOXIDES HAVING 2 TO 10 EPOXY GROUPS AND PREFERABLY EPOXIDE EQUIVALENTS OF 100 TO 300 ARE CURED WITHOUT APPLICATION OF EXTERNAL HEAT BY MIXING THEM WITH A CATALYST SYSTEM CONSISTING ESSENTIALLY OF A MIXTURE OF A LEWIS ACID AND A PHOSPHORUS COMPOUND OF THE FORMULA R-P(=O)(-OH)2 OR R''-O-P(=O)(-OH)2 IN WHICH R AND R'' REPRESENT ALKYL, ARYL, CYCLOALKYL, ALKYLARYL, ARALKYL, ALKOXYALKYL, ALKOXYARYL, HYDROXYALKYL. HYDROXYARYL, HYDROXYARALKYL OR ALKENYL. EPOXIDE RESINS ARE THUS OBTAINED BY A ROOM TEMPERATURE CURE WHICH EXHIBIT GOOD RESISTANCE TO ALKALIES. THE PRODUCTS MAY BE USED FOR MAKING GLASS FIBER REINFORCED ARTICLES AND FOR COATING SUCH MATERIALS AS PAPER, METALS, WOOD, TEXTILES AND PLASTICS.
Inventors
- 👤 Alfred Kuhlkamp
- 👤 Edgar Fischer
- 👤 Ernst Nolken
Bibliographic Details
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