PT2179 White Laminating System for Economical, Stable Tooling
DESCRIPTION
PT2179 is a white room temperature service epoxy laminating resin intended for use in producing a wide
variety of tools and fixtures. The cured properties of this system are
quite good. Tooling made with it exhibits very good long term
dimensional stability. Two hardeners are available for use with PT2179
resin, for different shop conditions and applications. PT2179 B has a 30
minute working time, and is better suited for warmer temperature use or
for thicker laminates where the added mass develops sufficient heat to
fully cure the system at cooler room temperatures. PT2179 B1 hardener
has a 20 minute working time and will cure completely in thinner
laminates, and at times when the Part B hardener might be too slow. The
mixed viscosity with both of these hardeners is low enough to allow
thorough penetration of the tooling fabric without any drain from
sharply contoured surfaces. The PT2179 system has been designed to allow
the construction of tooling very economically. This economy does not
require compromises, as the cured product has excellent properties.
PRODUCT SPECIFICATIONS
| PT2179 A | PT2179 B | PT2179 B1 | ASTM Method | |
| Color | White | Amber | Amber | Visual |
| Viscosity | 6,500 cps | 400 cps | 400 cps | D2392 |
| Specific Gravity, gms./cc | 1.50 | 1.05 | 1.07 | D1475 |
| Mix Ratio by Weight | 100 : 13 | 100 : 16 | PTM&W | |
| Pot Life, 4 fl oz Mass @ 77°F | 30 min. | 20-25 min. | D2471 |
HANDLING & CURING
PT2179 will cure completely with no heat added at normal ambient room
temperatures. When the laminate size guidelines for the two hardeners as
listed above are followed, at 77°F, 18 to 24 hours is usually
sufficient cure time to allow handling of the laminate. Keep in mind
that smaller, thinner laminates made with the Part B hardener will take
longer to reach full cure than if the Part B1 hardener is used. The
cures can be accelerated with heat if desired, however, heat curing will
increase shrinkage in the cured material. For a typical heat cure
cycle, allow the material to gel hard at room temperature, followed by
an oven cure of 150°F for 1 to 2 hours.
PACKAGING WEIGHTS
| Pail | Drum Kit | Hardener Drum | |
| PT2179 Part A | 50 lb. | 550 lb. | — |
| PT2179 Part B | 6.5 lb. | 2 @ 36 lb. ea. | 360 lb. |
Inasmuch
as PTM&W Industries, Inc. has no control over the use to which
others may put material, it does not guarantee that the same results as
those described herein will be obtained. The above data was obtained
under laboratory conditions, and to the best of our knowledge is
accurate. This information is presented in good faith to assist the
user in determining whether our products are suitable for his
application. No warranty or representation, however is intended or
made, nor is protection from any law or patent to be inferred, and all
patent rights are reserved. Before using, user shall determine the
suitability of the product for his intended use, and user assumes all
risk and liability whatsoever in connection therewith. In no event with
PTM&W Industries, Inc. be liable for incidental or consequential
damages. Buyer’s sole and exclusive remedy in such instances shall be
limited to replacement of the purchase price.
TYPICAL MECHANICAL PROPERTIES
| PT2179 A/B | PT2179 A/B1 | ASTM Method | |
| Mix Ratio, by Weight | 100 : 13 | 100 : 16 | PTM&W |
| Color | White | White | Visual |
| Mixed Viscosity, centipoise, @ 77°F | 5,000 cps | 5,000 cps | D2393 |
| Pot Life, 4 fl. oz. Mass @ 77°F | 30 min. | 20 min. | D2471 |
| Cured Hardness, Shore D | 91 Shore D | 89 Shore D | D2240 |
| Specific Gravity, grams, cc | 1.43 | 1.48 | D1475 |
| Density, lb./cu. inch | .0516 | .0537 | D792 |
| Specific Volume, cu. in./lb. | 19.4 | 18.6 | D792 |
| Tensile Strength, psi | 26,390 psi | 28,100 psi | D638 |
| Elongation at Break, % | 1.6 % | 1.7 % | D638 |
| Tensile Modulus, psi | 2.49 x 106 psi | 2.29 x 106 psi | D638 |
| Flexural Strength, psi | 43,153 psi | 41,740 psi | D790 |
| Flexural Modulus, psi | 2.73 x 106 psi | 2.16 x 106 psi | D790 |
| Compressive Strength, psi | 17,600 psi | 17,020 psi | D695 |
| Glass Transition Temp., DMA: Tg | 196°F | 197°F | D4065 |
SAFETY & HANDLING
PTM&W epoxy products are made from raw materials carefully chosen to minimize or even eliminate toxic chemicals, and therefore offer the user high performance products with minimum hazard potential when properly used. Generally, the PTM&W epoxy resins and hardeners will present no handling problems if users exercise care to protect the skin and eyes, and if good ventilation is provided in the work areas. However, all epoxy resins and hardeners can be irritating to the skin, and prolonged contact may result in sensitization; and breathing of mist or vapors may cause allergenic respiratory reactions, especially in highly sensitive individuals. As such, avoid contact with eyes and skin, and avoid breathing vapors. Wear protective rubber apron, clothing, gloves, face shield or other items are required to prevent contact with the skin. In case of skin contact, immediately wash with soap and water, followed by a rinse of the area with vinegar, and then a further wash with soap and water. The vinegar will neutralize the hardener and lessen the chances of long term effects. Use goggles, a face shield, safety glasses or other items as required to prevent contact with the eyes. If material gets into the eyes, immediately flush with water for at least 15 minutes and call a physician. Generally, keep the work area as uncluttered and clean as possible, and clean up any minor spills immediately to prevent accidental skin contact at a later time. Keep tools clean and properly stored. Dispose of trash and empty containers properly. Do not use any of these types of products until Material Safety Data Sheets have been read and understood.