Shell Oil Comapny

Virgilius Christiaan Van Liempd

Willem Sjardijn

Feike De Jong

Johannes Jozias Blom

Wilhelmina Johanna Van Der Linden-Lemmers

Paulus Egidius Raas

Johannes Petrus Beerepoot

Johannes J Wintraecken

Antonius J Zwijnenberg

The invention provides for a process for the preparation of an advanced epoxy resin by reaction of a compound having on average more than one epoxy group per molecule and a compound having on average one or more hydroxyl group or carboxyl group per molecule in the presence of a catalyst at elevated temperature, the process comprising (1) mixing the epoxy compound, the hydroxyl compound or the carboxyl compound and the catalyst, and (2) transferring the mixture as a feedstream to a surface exposed to an elevated temperature sufficient to produce an advanced epoxy resin which is at least intermittently moving with respect to the feedstream. In a preferred embodiment an endless conveyer belt with additional heating means and optional cooling means are used.

Advanced epoxy resins

The invention provides for a process for the preparation of an advanced resin by reaction of a compound having on average more than one epoxy group per molecule and a compound having on average one or more hydroxyl group or carboxyl group per molecule in the presence of a catalyst at elevated temperature, the process comprising (1) mixing the epoxy compound, the hydroxyl compound or the carboxyl compound and the catalyst, and (2) transferring the mixture as a feedstream to a surface exposed to an elevated temperature sufficient to produce an advanced epoxy resin which is at least intermittently moving with respect to the feedstream. In a preferred embodiment an endless conveyer belt with additional heating means and optional cooling means are used.

Process for the preparation of advanced resins

An adduct of a glycidyl ester of an alpha,alpha-branched saturated monocarboxylic acid containing a total of 5 to 18 carbon atoms and 2-isopropylimidazole can be used to cure epoxy resin compositions useful in preparing prepregs for electrical laminates.

Glycidyl ester/imidazole adduct-containing composition

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Amsterdam, Netherlands

Virgilius Christiaan Van Liempd