Sedisperse® Particle Dispersion Liquids

Product Bulletin Number 33

Sedisperse® Particle Dispersion Liquids

Description

Sedisperse A-, S-, and P-Series liquids are stable, balanced formulations for dispersing insoluble particles. These liquids are basically highly purified, nonpolar, saturated aliphatic hydrocarbons. These liquids produce nearly universal dispersion of powder-liquid systems with solids concentrations below generally three weight percent, but up to as much as five weight percent in some cases. Sedisperse liquids solubilize adsorbed moisture.

Sedisperse W-Series liquids are slightly anionic, non-foaming, aqueous formulations for dispersing insoluble particles. They also produce nearly universal dispersion of systems with solids concentrations generally below three weight percent.

Applications

(Sedisperse liquids contain built-in surfactants so that nothing needs to be added for the dispersion of particles. These liquids are available over a range of densities and viscosities, thus making them applicable to particles of widely varying properties.

Sedisperse liquids are designed to be used without dilution or the addition of surfactants, exhibit good shelf life and stability, and are supplied with handling details and density and viscosity data over a temperature range of 24 to 36 deg C. Sedisperse A-Series liquids are the primary liquids and will disperse most powders including metals, oxides, silicates, pigments, Portland cements, propellants and many organic powders. Sedisperse S-Series was specially formulated for dispersion of magnesium oxide and related powders.

Those few materials which do not disperse well in Sedisperse A- or S-Series liquids can usually be dispersed in Sedisperse P-Series liquids, which are special formulations, slightly cationic, developed to disperse metal powders (particularly W of Pd), pigmented resin powders, and certain materials (particularly catalysts) determined experimentally. Sedisperse W-Series liquids should be used to disperse those materials which are soluble in the organic Sedisperse liquids.

Technical Data

Recommended techniques for using these liquids:

1. Disperse particles using energy from an ultrasonic bath or probe.
2. Determine the size of the largest particles using a microscope.
3. Next calculate the liquid viscosity needed by using the relationship:

where :

n = minimum viscosity permitted, in centipoise

D_max = equivalent spherical diameter of the largest particles, in um; and

D_max = equivalent spherical diameter of the largest particles, in um; and

p = density of the particles, in g/cm3

This calculation assumes a particle Reynolds number of 0.1

(Note: Solvent-resistant tubing, MIC P/N: 500-32906-01, and grooved cell windows, MIC P/N: 500-32806-00 with gaskets, MIC P/N: 500-32804-00 are recommended when using the organic Sedisperse liquids.)

Ordering Information

Sedisperse Liquids are complete dispersing liquids containing surfactants. A- and S-Series liquids are the ones most widely used for dispersing powders.

A-11 Viscosity between 1.0 and 1.5 mPa/s (centipoise)

004-16801-01 500 mL (1.06 pint, U.S. liquid)

004-16801-04 4 L (1.06 gallon, U.S. liquid)

A-12 Viscosity between 3.4 and 4.9 mPa/s (centipoise)

004-16802-01 500 mL (1.06 pint, U.S. liquid)

004-16802-04 10 L (1.06 gallon, U.S. liquid)

A-13 Viscosity between 7.0 and 10.4 mPa/s (centipoise)

004-16803-01 500 mL (1.06 pint, U.S. liquid)

004-16803-04 4 L (1.06 gallon, U.S. liquid)

A-14 Viscosity between 12.8 and 20.9 mPa/s (centipoise)

004-16804-01 500 mL (1.06 pint, U.S. liquid)

004-16804-04 4 L (1.06 gallon, U.S. liquid)

S-12 Viscosity between 1.5 and 2.8 mPa/s (centipoise)

004-16809-01 500 mL (1.06 pint, U.S. liquid)

004-16809-04 4 L (1.06 gallon, U.S. liquid)

Those few materials not dispersing well in the A- or S-Series Sedisperses can usually be dispersed in the P- or W-Series. The P-Series are slightly cationic liquids especially developed for metal powder dispersions. The W-Series are slightly anionic, aqueous liquids for dispersing insoluble particles.

P-11 Viscosity between 1.2 and 1.7 mPa/s (centipoise)

004/16805/01 500mL (1.06 pint, U.S. liquid)

004-16805-04 4 L (1.06 gallon, U.S. liquid)

P-12 Viscosity between 3.6 and 5.4 mPa/s (centipoise)

004-16806-01 500 mL (1.06 pint, U.S. liquid)

004-16806-04 4 L (1.06 gallon, U.S. liquid)

W-11 Viscosity between 0.8 and 1.1 mPa/s (centipoise)

004-16807-01 500 mL (1.06 pint, U.S. liquid)

004-16807-04 4 L (1.06 gallon, U.S. liquid)

W-12 Viscosity of 3 to 4.5 mPa/s (centipoise)

004-16808-01 500 mL (1.06 pint, U.S. liquid)

004-16808-04 4L (1.06 gallon, U.S. liquid)

Storage Requirements

Keep containers closed. Keep containers from freezing. If container develops a leak during storage, transfer to another clean one. Spillage may be cleaned using detergent and water. Sometimes particles may crystallize and fall out of Sedisperse liquids during storage. This is usually a result of exposure to cold temperatures. It is corrected by warming the Sedisperse to 40 to 50 deg C and then vigorously shaking the liquid in a closed container to re-dissolve the particulates.

Material Properties

1. Acute Oral Toxicity: LD50 > 7.1 kg.
2. Local Effect on Eyes: Slight, transient.
3. Local Effect on Skin: Non-irritating.
4. Shock Sensitivity: None
5. Does not decompose when exposed to air, water or strong oxidizers.
6. Does not generate heat through polymerisation or condensation.
7. Flash Point: 62 deg C (144 deg F). Closed cup
8. Recommended Extinguishing Agents: Foam.
9. Hazard by Inhalation: No evidence of toxicity.

First Aid Treatment

1. Skin Contact: Non-irritating.
2. Eye Contact: Rinse with water.
3. Inhalation: Non-irritating.
4. Antidote in Case of Swallowing: Same as mineral spirits.