Poly-Resyn, Inc.

 

POLYTROL GFT

 

MODIFIED ORGANIC THIXOTROPE FOR NON-AQUEOUS COATINGS,

INKS, ADHESIVES, CAULKS AND SEALANTS

 

POLYTROL GFT is 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.

 

Applications

Architectural Paints, Sealers, Stains, Primers and Undercoats

Maintenance Paints

Marine Primers and Finishes

Industrial Coatings and Product Finishes

Road Marking Paints

Aerosols

Printing Inks and Adhesives

Caulks, Putty and Sealants

Polyester and Epoxy Patching compounds, Cold Solders, Gel Coats

Mastic and Trowel Compounds

Asphaltic 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.

 

Performance Features

Viscosity Increase

Rapid Development of Thixotropy

Pigment Suspension

Optimum Balance Between Sag Control and Leveling

Penetration Control

No Affect on Color, Gloss, Water Resistance or Durability

Maximum Rheological Value

Coatings containing POLYTROL 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 of POLYTROL 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.

 

Processing

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 130180F (3582C) for systems containing aliphatic solvents and at 90120F (3349C) 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 120F.

 

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.

 

Usage Level

POLYTROL GFT is 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.

 

Properties

Form Fine White Powder

Density (gm/cm3) 1.46

Wt./Gal. 12.1

Kilograms/Liter 1.4526

Bulking Value (gallons/lbs.) 0.082

 

(THIS IS NOT TO BE CONSIDERED A SPECIFICATION)

Poly-Resyn, Inc.

 

534 Stevens Court, Dundee, IL 60118

847-428-4031 800-233-4325 Fax 847-428-0305 www.polyresyn.com

 

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-Resyns 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.

3/2001

Home