A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Xanthan Gum - a natural, rheological control agent for waterborne coatings
The role of xanthan gum in the formulation of preservative paints, wood stains and decorative waterborne low-VOC paints for wooden fences was examined. The viscosity and flow behavior of xanthan gum was investigated. The apparent viscosity was highly dependent on the shear rate and was 50 times greater than a carboxy methyl cellulose gum. This makes xanthan the correct choice for particulate suspensions. The pseudoplastic nature of xanthan gum solutions render them excellent stabilizers of particulates. In preservative fence plaints, this means insoluble pigments and preservatives can be homogeneously distributed in the product. The resulting product will not thicken or separate during storage and transportation. When finally used by the customer, the product is easy to mix and pour. General properties of xanthan gum include high viscosity at low concentrations, pseudoplastic flow behavior, ready hydration in tap water, even in the presence of counterion, stable over a wide pH range, excellent shear and thermal stability, not degraded by commonly occurring enzymes, tolerant to salts, stable to acidic and basic conditions, and compatible with the addition of nonionic and anionic surfactants and alcohols.
Xanthan Gum - a natural, rheological control agent for waterborne coatings
The role of xanthan gum in the formulation of preservative paints, wood stains and decorative waterborne low-VOC paints for wooden fences was examined. The viscosity and flow behavior of xanthan gum was investigated. The apparent viscosity was highly dependent on the shear rate and was 50 times greater than a carboxy methyl cellulose gum. This makes xanthan the correct choice for particulate suspensions. The pseudoplastic nature of xanthan gum solutions render them excellent stabilizers of particulates. In preservative fence plaints, this means insoluble pigments and preservatives can be homogeneously distributed in the product. The resulting product will not thicken or separate during storage and transportation. When finally used by the customer, the product is easy to mix and pour. General properties of xanthan gum include high viscosity at low concentrations, pseudoplastic flow behavior, ready hydration in tap water, even in the presence of counterion, stable over a wide pH range, excellent shear and thermal stability, not degraded by commonly occurring enzymes, tolerant to salts, stable to acidic and basic conditions, and compatible with the addition of nonionic and anionic surfactants and alcohols.
Xanthan Gum - a natural, rheological control agent for waterborne coatings
Winwood, Rob (author)
2004
6 Seiten, 3 Bilder, 4 Quellen
Conference paper
English
Qualifying Waterborne Coatings
British Library Online Contents | 1994
Xanthan Gum in Water-Based Paints and Coatings
| British Library Online Contents | 1998