Deuteron VT 819
Glyoxal-modified xanthan thickener with delayed hydration. Added under gentle stirring at pH 5 to 7 and fully dispersed about five minutes after the pH is adjusted.
Glyoxal-modified xanthan thickener with delayed hydration. Added under gentle stirring at pH 5 to 7 and fully dispersed about five minutes after the pH is adjusted.
Deuteron VT 819 is a natural biopolymer thickener based on polysaccharides, carrying a glyoxal surface treatment that delays hydration. The delay is the point: the particles disperse before they start to swell, so the material goes in without lumps.
It builds a strong structure viscosity. Viscosity falls under shear and returns when the shear stops, holding pigments and fillers in suspension during storage and stopping a coating sagging after application.
At 2700 mPa.s in a 1 percent solution it is the highest-viscosity xanthan in the Deuteron range, and at approximately 800 g/l it is a dense powder rather than a granule.
| Property | Typical value |
|---|---|
| Appearance | Yellowish powder |
| Bulk density | approx. 800 g/l |
| Viscosity, 1 percent in water | approx. 2700 mPa.s |
| Surface treatment | Glyoxal, for delayed hydration |
| Addition pH | 5 to 7 |
Dosage: 0.1 to 1.0 percent for thickening and gel formation, 0.1 to 0.3 percent to stabilise solids against sedimentation, and 0.1 to 0.5 percent for anti-sagging.
Typical values from the manufacturer's technical data sheet. They describe the product, they are not a specification. We will send the current TDS and the batch documentation your qualification needs.
Tell us the binder system, the property you are targeting, and the volume you expect. We will confirm the grade, send the documentation, and ship a sample from North American stock.
Viscosity adjustment where the plant has no high shear disperser.
Holds pigments and waxes against floating and settling.
Structure viscosity that recovers after application shear.
Lump-free thickening under gentle stirring.
Stable gels and suspended solids.
It is specified where the formulation needs general viscosity adjustment, less floating and settling of waxes and pigments, better stability and anti-sagging, stable gels, and lump-free incorporation without high shear.
The glyoxal layer dissolves rapidly at basic pH and releases the xanthan to hydrate. Add VT 819 to a system at pH 5 to 7 to keep the dispersion lump free. Once it is dispersed the pH can be taken above 7 without any problem.
Because of the surface treatment it can be dosed under gentle stirring. High shear is not necessary, and the material is usually fully dispersed within five minutes of the pH being adjusted.
Thickener solutions based on polysaccharides need protection against fungal and bacterial growth. Any broad-range biocide used in the paint industry is suitable.
Package sizes: Paper bags, 25 kg net.
Storage: 24 months at room temperature in dry conditions. Storage temperature should not exceed 35 °C and relative humidity should not exceed 70 percent.
Under Regulation (EC) No. 1272/2008 Deuteron VT 819 is not classified as a dangerous product and does not require hazard labelling. The safety data sheet and the regulatory information sheet carry the detail your review will want.
The glyoxal surface layer is what delays hydration, and it dissolves rapidly at basic pH. Adding the powder into a system already above pH 7 releases the xanthan too fast and invites lumps. Add it between pH 5 and 7, disperse, then take the pH wherever the formulation needs it.
Both are xanthan gum. XG is untreated powder: it hydrates immediately, tends to lump, and needs 20 to 30 minutes under high shear. VT 819 is surface treated so it disperses under gentle stirring in about five minutes. XG is the lower-cost route if you have the equipment.
Those are granulated rather than surface treated, and they take 10 to 15 minutes under moderate stirring. VT 819 is a dense powder at 800 g/l with a higher solution viscosity, 2700 against 2200 mPa.s, and the fastest dispersion of the four once the pH is right.
No. The glyoxal-modified grade is a coatings additive. The food-additive standards listed on VT 920 and VT 930 do not apply to VT 819, so specify one of those grades if that compliance is part of your requirement.
Yes. We send the Technical Data Sheet (TDS), Safety Data Sheet (SDS), and Regulatory Information Sheet on request, in the manufacturer's current revision. Use Request TDS or SDS above and tell us what your qualification review needs.
Untreated xanthan powder, lower cost where high shear is available.
Granulated, dust free, and food-additive compliant.
The transparent granulated grade.