Min-U-Gel®  Speciality Thickeners

Min-U-Gel minerals are specially processed colloidal gelling agents prepared in fine particle sizes from attapulgite clay.  Their gel characteristics are best described as yield-pseudoplastic and thixotropic, providing valuable benefits to the user such as:

Features

Benefits

Stable Gel Strength

  • Prevents settling of solids, phase separation or syneresis in the mixture during storage, thereby reducing pre-application mixing time

High Viscosity at Low Shear Rates

  • Maintains mix uniformity during processing and packaging
  • Permits use of low shear mixers
  • Minimises sag and flow after application
  • Controls penetration rate of adhesives and stains
  • Prevents adhesive squeeze-out during high pressure laminating

Low Viscosity at High Shear Rates

  • Permits faster mixing prior to application
  • Makes application easier
  • Improves levelling during application of high viscosity mixtures

Rapid “Recoverability”

  • Mixture quickly returns to its original viscosity after application, or after mixing before application

Consistent Gel Characteristics at Extreme Temperature Conditions

  • Permits use in high or low temperature applications or manufacturing conditions

Min-U-Gel® Applications

Features

Benefits

Paint

  • Min-U-Gel 400 is recommended to prevent sag after application and to suspend pigments in the liquid while in the can

Sealants and Mastics

  • Min-U-Gel 400 allows sealants or mastics to be spread or extruded easily under shear; but it will prevent sag when the shear is stopped.  Its excellent suspension ability provides good product stability in the can.

Adhesives

  • Min-U-Gel 400 is used in adhesives developed for laminating wood products, controlling the adhesive’s penetration rate into the wood.  In addition, for the same reasons given for paints, sealants and mastics

Joint Compounds

  • Min-U-Gel FG is used in joint compounds developed for taping gypsum wall board joints.  It is used in both the wet and dry forms of joint compounds, providing the same functions described under sealants and mastics

Other Applications

  • Other grades are available for use in inks, stains, liquid waxes, sealers, friction materials and plastisols

Acti-Gel® 208 offers fast stability control for water-based products

The material

Acti-Gel® 208 is a highly purified, clay-based powdered product.  The purification process includes two process patents resulting in a Magnesium Aluminium Silicate product which has unique properties.

The raw material in this process is known as attapulgite clay; its properties change drastically as result of this purification process.  It becomes a product with completely homogeneous rod-shaped particles, with pseudo-nano dimensions.

The theory

Stability at rest in thixotropic or pseudo plastic liquids is often the result of a three dimensional network of tiny particles at rest.

The homogeneous shape of the Acti-Gel® 208 particles allows very fast formation of such a network in water-based products, preventing settlement and water floatation highly efficient.

Upon shear (spraying, pumping, tooling, brushing or pouring) this network is broken down completely.  This results in a very low viscosity under shear.

As soon as the water-based product is at rest the network is formed again very fast.  In some cases in less than 0.2 seconds!

This results in the reconstruction of a high viscosity (stabilisation, preventing sagging) after application.

The result

Water-based liquids, slurries and suspensions with ions and/or solids (with charge) can become highly pseudo plastic by addition of 0,01-3% (w/w) of Acti-Gel® 208.

Water-based products show excellent workability, spray-ability, self-levelling properties, green strength and self-compacting properties since the viscosity is very low by the shear during application.  The viscosity under shear is lower than with cellulose ethers.

Once applied, viscosity will recover by absence of shear, resulting in unmatched stability (no bleeding, no segregation, high layer thickness, no synereses, and no colour float).

The dosing rate of Acti-Gel 208® depends on the amount of ions and/or solids with charge in your water based product.  The level needed will be lower at high concentrations of ionic charges.

The time needed for the viscosity to recover after applying shear also depends on this concentration of ionic charges.  Recovery will be faster at higher concentrations of charge.  It has also been found to act as a  reinforcing filler in several applications.

The bonus

Acti-Gel® 208 is non reactive, non-swelling, non-shrinking, temperature stable, non retarding, shear stable and bio-stable.

Applications

Acti-Gel® 208 has been on the market since 2000.  Examples of highly successful applications are:

Application

Most remarkable benefits

Water based paints and inks

Eliminates sedimentation

Decreases synerese

Pigment dispersions

Prevents settlement

Better pump ability

Ceramic glazes, enamels and engobes , machine applied plasters (cement or gypsum based)

Smoother surface, less defects.  Improved work ability.

Less sensitive for temperature

Providing green strength in many applications

Higher green strength, non sticky

Catalyst processing

Harder product, wear resistance

Availability:

We are the UK distributor for Active Minerals LLC and these products are readily available from our stocks in Stoke on Trent, England.

Datasheets & MSDS

Acti gel 208 TDS
Min U Gel 200 TDS
Min U Gel 400 TDS
DatasheetMUGFG
Min U Gel G35 TDS
Min U Gel PC TDS
ACTI GEL 208 MSDS
MSDS Min U GEl European Union English 2015