Effect of degree of ethoxilation on the viscosity depressancy properties of fatty acid ethoxilates used in PVC paste formulations

Plastisols of poly (vinylchloride) (PVC) are important commercial products. The rheological properties especially the viscosity of the paste plays an important role in PVC paste applications. Viscosity depressants are usually added to paste formulations in order to obtain desired paste viscosities....

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Bibliographic Details
Published in:Journal of Vinyl Technology 1989-06, Vol.11 (2), p.84-89
Main Authors: Düzgören, M., Bilgic, T., Savaşçi, Ö. Tunç
Format: Article
Language:English
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Summary:Plastisols of poly (vinylchloride) (PVC) are important commercial products. The rheological properties especially the viscosity of the paste plays an important role in PVC paste applications. Viscosity depressants are usually added to paste formulations in order to obtain desired paste viscosities. In this work, viscosity depressant effects of various fatty acid/ethylene oxide condensates containing 2 to 12 moles ethylene oxide per mole are investigated by Brookfield rotational viscometric method. The effectivenesses of the viscosity depressants are determined at 1.3 sec−1 shear rates and a relationship between ethylene oxide content and viscosity reduction is found. This relationship between effectiveness and degree of ethoxilation gives way to prediction of viscosity reduction of paste by simply determining the ethylene oxide content. The effect on 24 h aging is also studied. The results showed improvements in short term aging properties of the PVC paste.
ISSN:0193-7197
1548-0585
DOI:10.1002/vnl.730110208