MODIFIED ORGANIC THIXOTROPE FOR NON-AQUEOUS COATINGS,
INKS, ADHESIVES, CAULKS AND SEALANTS
POLYTROL GFTis an improvement over POLYTROL FT. It disperses more quickly while providing all of the properties of POLYTROL FT. The improvement involves modification of the individual particles enabling better dispersion efficiency,--more effective swelling and gelling. POLYTROL GFT is superior to POLYTHIX GM. Demonstrating in a Warring blender (typical mineral spirits system with no pigment), POLYTROL GFT will reach a Hegman reading (fineness of grind) in a shorter period than POLYTROL FT. Conversely, by the same procedure, for a given time period the Hegman reading will be superior to that for POLYTROL FT. Typical of the organic thixotropes, POLYTROL GFT imparts a characteristic,--"butteryness", advantageous to coatings, inks, adhesives, caulks and sealants.
ØArchitectural Paints, Sealers, Stains, Primers and Undercoats
ØMarine Primers and Finishes
ØIndustrial Coatings and Product Finishes
ØRoad Marking Paints
ØPrinting Inks and Adhesives
ØCaulks, Putty and Sealants
ØPolyester and Epoxy Patching compounds, Cold Solders, Gel Coats
ØMastic and Trowel Compounds
ØAsphaltic and Bituminous Products
As an improvement over POLTROL FT it is highly recommended for the thick film, high build protective coatings based on chlorinated rubber, vinyls and epoxy polyamides (Navy Specification MIL-P-24441). It is the most efficient means for providing Thixotropy in these systems which cannot tolerate reactivity, pin holing, etc.
ØRapid Development of Thixotropy
ØOptimum Balance Between Sag Control and Leveling
ØNo Affect on Color, Gloss, Water Resistance or Durability
ØMaximum Rheological Value
Coatings containingPOLYTROL GFT are truly thixotropic, having a specific but short period of viscosity recovery. This time-dependency factor is a characteristic of thixotropy and is preferred over pseudoplastic gallants because it provides for flow-out (leveling) without impairing sag control.
The thixotropy ofPOLYTROL GFT identifies with two factors: (1) the solubility parameter of the vehicle solids, which vary according to the nature of the binder, and (2) the solvent power of the solvents. A primary rule for developing thixotropy calls for thorough dispersion and swelling of the particles, followed by shearing in the vehicle-pigment system.
In high-speed dispersers,POLYTROL GFT is added to the vehicle and some solvent for a ten-minute premix. The pigments and other components are added followed by high-shear dispersion for 10-15 minutes. The temperature range will be 130°–180°F (35°–82°C) for systems containing aliphatic solvents and at 90°–120°F (33°–49°C) for those containing aromatics, oxygenated or ester solvents. Letdown vehicle (and solvent) are then added with agitation continuing while the batch cools to at least 120°F.
For sand mills and attritors the dwell time is so short as to not allow for complete dispersion and swelling. This suggests premixing in a high-speed disperser according to the above procedure.
POLYTROL GFTis effective at 0.5% to 1.5% by weight on the total composition. The exact amount will depend on the specific formulation and desired rheological properties. Preliminary evaluation is suggested at about seven pounds per 100 gallons – adequate as a starting point for conventional paints and coatings. At this level the formulator can observe primary characteristics, making further adjustments according to the finished product requirements.
Form Fine White Powder
Density (gm/cm3) 1.46
Bulking Value (gallons/lbs.) 0.082
(THIS IS NOT TO BE CONSIDERED A SPECIFICATION)
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Poly-Resyn Incorporated makes no representations or warranties with respect to the accuracy of research on materials it sells. Poly-Resyn disclaims any implied warranties of merchantability or fitness for any particular purpose. The Poly-Resyn materials are solid "as is". Poly-Resyn shall not be liable for incidental or consequential damages by use of its materials. The user assumes all risk of use and handling. Poly-Resyn’s liability arising out of use of its materials shall be limited to replacement of the materials. The Poly-Resyn materials shall not be used in any way, which would infringe any patent.