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 Part A | PT2752 Part B | ASTM Method | |
| Color | Light Amber | Light Amber | Visual |
| Viscosity, @ 77F, centipoise | 13,000 cps | 60 cps | D2392 |
| Specific Gravity, gms./cc | 1.16 | 0.96 | D1475 |
| Mix Ratio | 100 : 40 By Weight 2 : 1 By Volume | 100 : 40 By Weight 2 : 1 By Volume | PTM&W |
| Pot Life, 4 fl. oz., Mass @ 77F | 55 – 66 minutes | 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 @ 150°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 |
PACKAGING WEIGHTS
| Gallon Kit | Pail Kit | 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/Volume) | 100 : 40 by Weight, 2 : 1 by volume | PTM&W | ||
| Color | Light Amber | Visual | ||
| Mixed Viscosity, @ 77°F, centipoise | 650 cps | D2393 | ||
| Pot Life, 4 fl. oz. Mass, @ 77°F | 55 – 65 minutes | D2471 | ||
| Cured Hardness, Shore D | 87 Shore D | D2240 | ||
| Specific Gravity, grams, cc | 1.09 | D1475 | ||
| Density (lb.per cu Inch/ lb. per gallon) | 0.0394 / 9.1 lb. | D792 | ||
| Specific Volume, cu. in./lb. | 25.4 | D792 | ||
| Tensile Strength, psi (Cast Bar) | 8,968 psi (62 MPa) | D638 | ||
| Elongation at Break, % (Cast Bar) | 8.54 % | D638 | ||
| Tensile Modulus, psi (Cast Bar) | 421,855 psi (2,909 MPa) | D638 | ||
| Glass Laminate1 | Carbon Laminate2 | |||
| Tensile Strength, psi (Laminate) | 51,800 psi (357 MPa) | 90854 psi (627 MPa) | D638 | |
| Elongation at Break, % (Laminate) | 1.77 % | 1.41 % | D638 | |
| Tensile modulus, psi (Laminate) | 3,796,836 psi (26,185 MPa) | 6,373,907 psi (43,958 MPa) | D638 | |
| Flexural Strength, psi (Cast Bar) | 15,393 psi (106 MPa) | D790 | ||
| Flexural Modulus, psi (Cast Bar) | 455,033 psi (3,128 MPa) | D790 | ||
| Flexural Strength, psi (Laminate) | 57,435 psi (396 MPa) | 95,926 psi (662 MPa) | D790 | |
| Flexural Modulus, psi (Laminate) | 3,363,756 psi (23,198 MPa) | 5,317,661 psi (36,674 MPa) | D790 | |
| Compressive Strength, psi | 12,656 psi (87 MPa) | D695 | ||
| Compressive Modulus, psi | 467,834 psi (3,226 MPa) | D695 | ||
| Izod Impace Strength, Method A Notched, ft.lb./in. of notch | 2.184 (116.6 J/m) | D256 | ||
| Glass Transition Temperature, DMA | 170°F Tg, E’ (onset) 189°F Tg, Peak | D4065 | ||
| Coefficient of Thermal Expansion, Range 40°C to 80°C | 4.75 x 10-5 in./in./°F | D696 |
*1: Properties Determined with 14 Plies Style 7781 Fabric, 0° Rotation,33% Resin Content, Infused, Cured Overnight @ 150°F.
*2: Properties Determined with 16 Plies 3K – 2X2 Carbon Twill, 0°, 45°, 90°, 45° Rotation, 35% Resin Content, Infused, Cured Overnight @ 150°F.
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