Incorporation and Processing Instructions. The additive can be incorporated in different ways. Either disperse GARAMITE directly in the millbase or add it. GARAMITE® is a unique rheological additive developed for a wide range of solvent born systems. Compared to fumed silica and organoclays. Rheology additive based on mixed mineral technology for solvent-borne unsaturated polyester, epoxy and vinyl ester resins that provides excellent.
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This can make the other thixotropes much more difficult to deal with in the long run. Cowles-type shear will suffice in all applications for dispersing the MMTs. The trend for higher-solids coatings is to have excessive package viscosity without sufficient sag resistance.
Byk has an established history of innovation such as being the first additive manufacturer to begin using Controlled Polymerization Technology CPTlaunching the first rheology-modified wax emulsion, and being one of the first companies to use nanotechnology for improving Coatings properties.
The water is garamihe to the clay surface and is not automatically available for reaction with the isocyanate. MMT Advantages In practical terms we have found that Garamite tends to build less package viscosity while providing more sag garmite than organoclays. Having the ability to make pourable high-solids pregels makes it easier to formulate in systems where one has low levels of solvents Figure 4.
Organoclay Rheological Additive Sg-58 Counter to Garamite 1958
Conclusions As coating formulations move to lower VOCs and higher solids, the demand on the thixotrope becomes more difficult as it pertains to package viscosity, 1598 and settling resistance. This article explains how and why Garamite works. Mixed Mineral Thixotropes MMTs are a combination of two different morphologies; one being a plate, the other being a rod. Stability can be lost in different areas, whether it be sag resistance falling off or package viscosity rising substantially.
Not only is sag resistance increased, but runs are reduced or eliminated Figure 3. Garramite this study baramite compared the MMT to a polyamide, both conventional and selfactivating organoclays, as well as a blank.
How to Use Garamite The use of Garamite is very similar to organoclays. Also, it bears mentioning that some color is imparted into clear, unfilled systems by the MMT. Zinc The next study intended to find the level of Garamite needed to suspend zinc through the use of high-solids pregels.
But in the end, Mother Nature tries to return the clay back to its natural state. As Figure 6 shows, Garamite is both efficient and stable. Originally we used the Garamite only in Part A. Garamite outperforms fumed silica and significantly outperforms conventional yaramite. Another key advantage to the coatings manufacturer is the ability to make high-solids premixes at pourable viscosities. When working with epoxies do not be afraid to try various combinations between Part A and Part B.
Figure 11 evaluates the effectiveness of Garamite garamit to organoclay in a PU system.
While not completely necessary, this will consistently yield the most efficient results. While polyamides in particular may be among the best at yielding that perfect buttery feel, they are much less forgiving during manufacture than MMTs. To totally suspend the zinc it took 1.
Including the other mineral type helps to prevent this from occurring. Certain quaternary amines work better in aliphatic vs. We have shown that Garamite fills this need in many cases as compared to conventional organoclays, polyamides and fumed silicas. In unfilled systems, another shortcoming would be that the MMTs do not perform quite as well for sag resistance. It is not unusual for the package viscosity to be lower and the sag resistance to be higher.
If solvent is not available, then add the Garamite to a reactive diluent or to the lowest-viscosity resin, with the first choice being the diluent. They are off-white powders that are organically modified and have a specific gravity of about 1. Polyurethane Systems Other potential applications include polyurethanes, epoxy adhesives and grouts, unsaturated polyesters, metallic coatings and aerosol coatings. This becomes more important as VOC goes down and solids go up.
If needed to gain a little more efficiency, one can use polar activators in a manner similar to traditional organoclays.
MMTs are compared to various thixotrope technologies used in different types of industrial coatings, including highsolids epoxies, low-HAPs systems, high-solids alkyds, chainstopped alkyds and zinc primers. While the efficiency was there we discovered that the sag resistance fell off during the pot life.
Self-activating organoclays tend to have a higher loading of quaternary amine on them. As you move from solvent to diluent to resin the efficiency will drop somewhat. We then realized that by splitting the Garamite Garamite has a unique morphology of rods and plates as compared to conventional organoclays that use just a plate-like layered structure Figure 2. This system turned out to be a little more difficult than the previous system, as it took the higher 4 pounds per gallon level of Garamite to eliminate the settling.
This leads to issues with dusting and incorporation for the fumed silica as compared to Garamite Figure 5. They also require the proper agitation during cooling in order to prevent the system from forming a false body.
As organoclay manufacturers we impart a lot of energy to break this naturally occurring layered mineral apart.
Industrial White Topcoat The next study looked at an industrial white topcoat. We will now recommend some starting use levels, keeping in mind that we are talking in generalities, and some systems have different demands than expected.
Powdered rheology additive: GARAMITE
Company Byk has an established history of innovation such as being the first additive manufacturer to begin using Controlled Polymerization Technology CPTlaunching the first rheology-modified wax emulsion, and being one of the first companies to use nanotechnology for improving Coatings properties. Notice the phase separation of the modification garmaite with organoclay. Garamite is significantly easier to incorporate when compared to polyamides and castor derivatives and does not have their temperature and dwell time limitations.
Epoxy Floor Coating Garamute 7 highlights the suspension of quartz sand in an epoxy floor coating. One advantage for fumed silica is clarity in the final film. But for reactivity and storage stability it should be tested to see if the water in Garamite causes issues in these watersensitive formulations. This page can be garamitf at taramite However, UL assumes no responsibility or liability for the accuracy of the information contained on this website and strongly encourages that upon final product or material selection information is validated with the manufacturer.
Organoclays are typically made from smectite and come in a form somewhat like a deck of cards, with clay particles Stacked one upon another.