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Norm
ÖNORM EN ISO 9396
Issue date: 2001 02 01
Plastics - Phenolic resins - Determination of the gel time at a given temperature using automatic apparatus (ISO 9396:1997)
This International Standard specifies a method for determining the gel time of
phenolic resins at a given temperature, using automatic apparatus under specified
conditi...
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Valid
Publisher:
Austrian Standards International
Format:
Digital | 5 Pages
Language:
German
| English
| Download GER/ENG
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ICS
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.
ÖNORM EN ISO 9396
2001 02 01
Plastics - Phenolic resins - Determination of the gel time at a given temperature using automatic ap...
Norm
↖
ÖNORM EN ISO 9396
1995 09 01
Plastics - Phenolic resins - Determination of the gel time at a given temperature using automatic ap...
Norm
Norm
ISO 9396:1997
Issue date :
1997 07 03
Plastics — Phenolic resins — Determination of the gel time of resols under specific conditions using automatic apparatus