PT4420 High Performance Aluminum Filled Resin
DESCRIPTION
PT4420 is a high performance epoxy casting resin with many excellent qualities which make it perform very well in a variety of demanding tooling applications. PT4420 has a very high aluminum content that provides excellent machinability to the finished castings. Castings made with PT4420 have high compressive strength for heavy loads. The significant aluminum content gives castings very good thermal conductivity. PT4420 has been designed to exhibit a soft filler settling to avoid time-consuming pre-blending that is necessary with hard packed fillers.
PRODUCT SPECIFICATIONS
| PT4420 Part A | PT4420 Part B | PT4420 Part B1 | ASTM Method | |
| Color | Gray | Amber | Amber | Visual |
| Viscosity, @77°F, centipoise | 200,000 cps @ 25°C 40,000 cps @ 50°C | 50 cps | 850 cps | D2392 |
| Specific Gravity, gms./cc | 1.78 | 1.5 | .99 | D1475 |
| Mix Ratio | 100 : 8.5 | 100 : 17 | PTM&W | |
| Pot Life, 4 fl. oz. Mass @ 77°F | 50 – 60 mins | 2 – 3 hours | D2471 |
HANDLING & CURING
Both PT4420 hardeners will cure completely at room temperature with no
added heat required. Castings made with the PT4420 Part B hardener may
be demolded after 18 to 24 hours at 77 o F, depending upon the size of
the casting. Castings made with the PT4420 Part B1 hardener usually
require a full 24 hour cure. If a shorter cure time is necessary, the
casting may be given an oven post cure after a room temperature gel. If
this is desired, check with our technical department for curing
guidelines. Heat curing will increase shrinkage.
PACKAGING WEIGHTS
| Gallon Kit | Pail Kit | |
| PT4420 Part A | 12 lb. | 47 lb. |
| PT4420 Part B | 1 lb. | 4 lb. |
| PT4420 Part B1 | 2.04 lb. | 8 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
| PT4420 A/B | PT4420 A/B1 | ASTM Method | |
| Mix Ratio, By Weight | 100 : 8.5 | 100 : 17 | PTM&W |
| Color | Metallic Gray | Metallic Gray | Visual |
| Mixed Viscosity, @77F, centipoise | 80,000 cps | 85,000 cps | D2393 |
| Pot Life, 4 fl. oz. Mass @ 77F | 50 – 60 mins | 2 – 3 hrs | D2471 |
| Cured Hardness, Shore D | 87 Shore D | 86 Shore D | D2240 |
| Shrinkage, in./in, Mold #2, Vol: .344 gal | .0006 | .0004 | D2566 |
| Specific Gravity, grams, cc | 1.69 | 1.60 | D1475 |
| Density, lb./cu. in. | .0611 | .0577 | D792 |
| Specific Volume, cu. in./lb. | 16.4 | 17.3 | D792 |
| Tensile Strength, psi | 9,650 psi | 7,900 psi | D638 |
| Flexural Strength, psi | 6,400 psi | 11,600 psi | D790 |
| Compressive Strength, psi | 16,000 pso | 24,000 psi | D695 |
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.