PT2050 Laminating System for Composite Parts
DESCRIPTION
PT2050
is a medium viscosity, unfilled, light amber laminating resin that is
designed for structural production applications. When used with the four
hardeners listed here, the combinations provide excellent wet-out of
fiberglass, carbon and aramid fibers. Special additives have been
incorporated into these products to promote chemical adhesion to fabrics
made with these fibers. Typical applications include aircraft and sail
plane skins and structural components, auto bodies, radomes and
prototype parts.
Hardeners PT2050-B1 and PT2050-B2 are the standard production hardeners
for fabricating composite parts. PT2050-B1 has a one hour working time,
and PT2050- B2 has been developed to provide a longer working time for
larger and/or more complicated laminates when needed. Both of these
hardeners will cure completely at room temperature without additional
heat. PT2050-B is a faster setting hardener that can be used for
patching and repairs, and smaller laminates. PT2050-B has a similar
viscosity to PT2050-B1 and PT2050-B2, so handling will be similar,
except for the faster cure. PT2050-B3 is a newer addition to our Tooling
line that offers some unique characteristics for certain uses. The
mixed viscosity of the system when using PT2050-B3 is considerably lower
than other laminating hardeners. This allows easy penetration of
thicker fabrics during hand lay-up, and provides a good system for the
infusion process. Also, even though it has a working time 50% longer
than PT2050 Part B1, it cures to a harder state overnight than when
using the B1 Hardener.
Cured properties with the PT2050-B3 are very similar to the high values
obtained with the other Parts B of the PT2050 system. These products can
be considered low toxicity materials that have minimum hazard potential
when used properly and in a clean and responsible manner.
PT2050 does not contain any hazardous diluents or extenders. Hardeners
PT2050-B, PT2050-B1, PT2050-B2 and PT2050-B3 do not contain methylene
dianiline (MDA), or other potentially harmful aniline derivatives.
Neither the resin or the hardeners will crystallize in normal shipping
and storage conditions. Both components have excellent moisture
resistance, for minimal problems in high humidity environments.
PRODUCT SPECIFICATIONS
| PT2050 A | Part B | Part B1 | Part B2 | Part B3 | ASTM Method | |
| Color | Amber | Amber | Amber | Amber | Light Amber | Visual |
| Viscosity | 1650 cps | 200-250 cps | 190-200 cps | 200-250 cps | 35 cps | D2392 |
| Specific Gravity, gms./cc | 1.15 | 1.065 | .96 | 1.0 | .97 | D1475 |
| Mix Ratio Weight, Volume | 100 : 23 4 : 1 | 100 : 27 3 : 1 | 100 : 27 3 : 1 | 100 : 25 (Weight) | PTM&W | |
| Pot Life, 4 fl oz Mass @ 77°F | 18-20 min. | 60-65 min. | 120-140 min. | 90-95 min. | D2471 |
HANDLING & CURING
PT2050-B1 and PT2050-B2 are the hardeners typically used to fabricate
high performance composite parts. PT2050-B1 has a one hour working time,
and can be used for all sizes of parts using the contact layup method
of fabrication. If the vacuum bagging technique is being used, PT2050-B1
should only be used for smaller parts. Hardener PT2050-B2 has a longer
working time that is useful for vacuum bagging larger parts before the
resin has gelled. In either case, with these hardeners, plan to allow
the laminate to cure at least 24 hours, at a minimum of 72°F before
moving the structure. This can be accelerated by applying heat after the
resin has gelled. Be careful using heat guns and lamps, as they tend to
concentrate heat, producing localized hot spots which can damage the
epoxy. These systems can be cured at ambient temperatures, or given an
elevated temperature cure. The higher the curing temperature is, the
higher the resulting service temperature. With a higher temperature
cure, a safe service temperature over 200°F can be obtained. The working
time of PT2050-B3 falls between the PT2050 Part B1 and PT2050 Part B2
hardeners, and it can be used for parts somewhat larger than would be
produced with PT2050 Part B1. The B3 hardener is unique, in that even
though it has a longer working time than the B2 hardener, it gels to a
hard state faster than with PT2050 Part B2. The very low mixed viscosity
of the PT2050-A/B3 system allows fast wet-out of the reinforcing
fabric. This can provide faster layup of larger structures within the
hardener’s working time, and it makes this system a good candidate for
the infusion process of laminate production. Hardener PT2050-B will cure
completely at room temperature, and does not require a heat cure. It is
intended for fast repairs or additions to a primary
structure, and for parts that will be exposed to lower service
temperatures. All primary structures should be fabricated with
PT2050-B1, PT2050-B2 or PT2050-B3, to take advantage of their longer
work life and better service temperature capabilities.
PACKAGING WEIGHTS
| Quart Kit | Gallon Kit | Pail | Drum Kit | |
| PT2025 A | 2.25 lb. | 7.5 lb. | 48 lb. | 500 lb. |
| PT2050 Part B | .53 lb. | 1.75 lb. | 11 lb. | — |
| PT2050 Part B1 | — | 2 lb. | 13 lb. | 135 lb. |
| PT2050 Part B2 | — | 2 lb. | 13 lb. | 135 lb. |
| PT2050 Part B3 | 0.6 lb. | 1.9 lb. | 12 lb. | 126 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
| PT2050 A/B | PT2050 A/B1 | PT2050 A/B2 | PT2050 A/B3 | ASTM Method | |
| Cured Hardness | 86 – 88 Shore D | 86 – 88 Shore D | 85 – 87 Shore D | 85 – 87 Shore D | D2240 |
| Density lb./cu.in lb./cu gal | .0410 9.47 | .0401 9.26 | .0402 9.40 | .0401 9.25 | D792 |
| Specific Volume, cu.in./lb. | 24.4 | 25 | 24.4 | 24.4 | D792 |
| Tensile Strength | 45,326 psi | 45,170 psi | 45,870 psi | 40,010 psi | D638 |
| Elongation @ Break, % | 1.93 % | 1.96 % | 1.98 % | 1.67 % | D638 |
| Tensile Modulus, psi | 2.53 x 106 psi | 2.62 x 106 psi | 2.52 x 106 psi | 2.65 x 106 psi | D638 |
| Flexural Strength, psi | 65,308 psi | 62,285 psi | 66,667 psi | 65,461 psi | D790 |
| Flexural Modulus, psi | 2.83 x 106 psi | 2.56 x 106 psi | 3.05 x 106 psi | 2.64 x 106 psi | D790 |
| Glass Transition Temperature, DMA: Tg | 180°F | 196°F | 205°F | 196°F | D4065 |
| Coefficient of Thermal Expansion, range 50-100°C | 3.73 x 10-5 in./in./°F | 4.3 x 10-5 in./in./°F | 4.15 x 10-5 in./in./°F | 4.14 x 10-5 in./in./°F | D696 |
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.