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  • ISO
    ISO 9396:1997 Plastics - Phenolic resins - Determination of the gel time of resols under specific conditions using automatic apparatus
    Edition: 1997
    $126.25
    / user per year

Content Description

This International Standard specifies a method for determining the gel time of phenolic resins at a given temperature, using automatic apparatus under specified conditions. The test temperatures are 100 °C, 130 °C and 150 °C.

The method specified employs a plunger driven to carry out a reciprocating vertical motion.

This method applies to the following types of phenolic resin:

  • liquid resols
  • solid resols with low melting points

Powdered resins with a short gel time, such as mixtures of novolak and hexamethylenetetramine, do not lend themselves to this type of determination. Such resins crosslink as soon as fusion starts and become too viscous in the test tube to give meaningful results. Resins containing large amounts of a solvent with a low boiling point are especially unsuitable for this type of determination. With such resins, a boiling and distillation process takes place as the resin hardens.

It might be of interest to determine the time taken for the resin to gel in the presence of a catalyst. The catalyst shall be added in well defined proportions. The type of catalyst used and its treatment shall be stated in the test report.



About ISO

ISO, the International Organization for Standardization, brings global experts together to agree on the best way of doing things – for anything from making a product to managing a process. As one of the oldest non-governmental international organizations, ISO has enabled trade and cooperation between people and companies all over the world since 1946. The International Standards published by ISO serve to make lives easier, safer and better.
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