The effect of storage temperatures below 100°C on the viscosity of a novolak resin propylene glycol solution

The aging of a novolak resin solution used in iron‐making blast furnace taphole clays is reported. The novolak resin propylene glycol solution was aged at temperatures between 2 and 80°C for up to 56 days. The viscosity was measured to evaluate the change in the resin's behavior. A cure reactio...

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Bibliographic Details
Published in:Journal of applied polymer science 2004-09, Vol.94 (1), p.267-276
Main Authors: Wells, Lisa J., Spinks, Geoffrey M., Nightingale, Sharon A.
Format: Article
Language:English
Subjects:
Applied sciences
curing of polymers
Exact sciences and technology
Physicochemistry of polymers
Polymer industry, paints, wood
resins
Technology of polymers
viscosity
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Summary:The aging of a novolak resin solution used in iron‐making blast furnace taphole clays is reported. The novolak resin propylene glycol solution was aged at temperatures between 2 and 80°C for up to 56 days. The viscosity was measured to evaluate the change in the resin's behavior. A cure reaction was found to occur with the addition of hexamethylenetetramine (HMTA) at temperatures lower than had previously been reported. Methods for handling and storage of taphole clay to avoid excessive increases in viscosity due to aging are discussed. An approach for estimating the long term aging at temperatures of 30 to 50°C was considered using shorter term aging data obtained at 70 and 80°C. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 267–276, 2004
ISSN:0021-8995
1097-4628
DOI:10.1002/app.20894