PT2752 A/B High Strength Toughened Infusion & Laminating System
DESCRIPTION
PT2752 is a high strength toughened epoxy system that is an ideal material for the production of very durable parts and structures which possess very high cured properties. With a low mixed viscosity, it is well suited to the resin infusion process, where it flows readily into the reinforcing fabric. It also performs very well in traditional hand lay-up operations and proves to be a quite versatile material for producing all types of parts and structures. Parts and structures that are subjected to high stress loads and severe impact abuse are good candidates for the tough nature of PT2752.
PRODUCT SPECIFICATIONS
| PT2752 A | PT2752 B | ASTM Method | |
| Color | Light Amber | Light Amber | Visual |
| Viscosity | 13,000 cps | 60 cps | D2392 |
| Specific Gravity, gms./cc | 1.16 | .96 | D1475 |
| Mix Ratio, by Weight | 100 : 40 | PTM&W | |
| Pot Life, 4 fl oz Mass @ 77°F | 55 – 66 min. | D2471 |
HANDLING & CURING
The high performance ingredients and additives used in PT2752 require a
heat cure to develop optimum properties with this system. PT2752 will
gel hard overnight at room temperature, but the material is brittle at
this stage. Even after 3 weeks at room temperature, the material will
achieve only 2/3 of ultimate properties, and it is still brittle! It
must be given some heat to cure sufficiently for service. Also, the part
or structure must be supported during heat cure to prevent sag or
distortion at elevated temperature before full cure. The amount and
duration of the heat cure needed can be determined by the end use of the
part or structure. The more heat applied, the higher the resulting
strengths and heat resistance. The following test results can be used to
determine the cure cycle best suited to your application:
| Allow to Gel @ Room Temp. | Initial Cure | Post Cure | % of Full Cure Attained |
| 6 – 8 Hours | Overnight @ 115°F | 79 % | |
| Overnight @ Room Temp. | 5 – 6 Hours @ 150°F | 85 % | |
| 6 – 8 Hours | Overnight @ 150°F | 98 % | |
| 6 – 8 Hours | Overnight @ 150°F | 2 – 3 Hours @ 175-180°F | 100% |
PACKAGING WEIGHTS
| Gallon Kit | Pail | Drum Kit | |
| PT2752 Part A | 9 lb. | 35 lb. | 450 lb. |
| PT2752 Part B | 3.6 lb. | 2 @ 7 lb. ea. | 180 lb. |
| Kit | 12.6 lb. | 49 lb. | 630 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
| PT2752 A/B | ASTM Method | ||
| Mix Ratio, by Weight | 100 : 40 | PTM&W | |
| Color | Light Amber | Visual | |
| Mixed Viscosity, @77°F, centipoise | 650 cps | D2393 | |
| Pot Life, 4 fl. oz. Mass @ 77°F | 55 – 65 min. | D2471 | |
| Cured Hardness, Shore D | 87 Shore D | D2240 | |
| Specific Gravity, grams, cc | 1.09 | D1475 | |
| Density, lb./cu in, lb./gallon | .0394, 9.1 lb. | D792 | |
| Specific Volume, cu. in./lb. | 25.4 | D792 | |
| Tensile Strength, psi (Cast Bar) | 8,968 psi | D638 | |
| Elongation at Break, % (Cast Bar) | 8.54 % | D638 | |
| Tensile Modulus, psi (Cast Bar) | 421,855 psi | D638 | |
| Glass Laminate | Carbon Laminate | ||
| Tensile Strength, psi (Laminate) | 51,800 psi | 90,854 psi | D638 |
| Elongation at Break, % (Laminate) | 1.77 % | 1.41 % | D638 |
| Tensile Modulus, psi (Laminate) | 3,796,836 psi | 6,373,907 psi | D638 |
| Flexural Strength, psi (Cast Bar) | 15,393 psi | D790 | |
| Flexural Modulus, psi (Cast Bar) | 455,033 psi | D790 | |
| Flexural Strength, psi (Laminate) | 57,435 psi | 95,926 psi | D790 |
| Flexural Modulus, psi (Laminate) | 3,363,756 psi | 5,317,661 psi | D790 |
| Compressive Strength, psi | 12,656 psi | D695 | |
| Compressive Modulus, psi | 467,834 psi | D695 | |
| Izod Impact Strength, Method A, Notched ft.lb./in. of Notch | 2.184 | D256 | |
| Glass Transition Temp., DMA Tg, E’ Tg, Peak | 170°F 189°F | D4065 | |
| Coefficient of Thermal Expansion, Range 40°C to 80°C | 4.75 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.