PT4450 IRON FILLED EPOXY CASTING RESIN
DESCRIPTION
PT4450
is a black, iron filled epoxy casting resin designed to provide tough,
durable castings of various sizes and thicknesses. As PT4450 is
relatively low in viscosity, it mixes and pours quite easily, and
reproduces detail on the model without trapping air or leaving voids.
This resin has been designed to be non-settling in transit and storage,
so it is easy to prepare and mix for pouring. Castings made with PT4450
have good compressive strength and toughness for long service life.
PT4450 has been used for tracer patterns, hydropress form blocks,
foundry patterns, metal forming dies and engineering prototype parts.
PRODUCT SPECIFICATIONS
| PT4450 Part A | PT4450 Part B | PT4450 Part B1 | ASTM Method | |
| Color | Black | Amber | Amber | Visual |
| Viscosity, @77F centipoise | 56,000 cps | 50 cps | 850 cps | D2392 |
| Specific Gravity, gms./cc | 1.73 | 1.05 | .99 | D1475 |
| Mix Ratio | 100 : 11.5 | 100 : 24 | PTM&W | |
| Pot Life, 4 fl. oz. Mass @77F | 45 – 50 min. | 2 – 3 hr. | D2471 |
HANDLING & CURING
Both PT4450 hardeners will cure completely at room temperature with no
added heat required. Castings made with the PT4450 Part B hardener may
be demolded after 18 to 24 hours at 77F, depending upon the size of the
casting. Castings made with the PT4450 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 | |
| PT4450 Part A | 13.5 lb. | 50 lb. |
| PT4450 Part B | 1.6 lb. | 5.75 lb. |
| PT4450 Part B1 | 3.25 lb. | 12 lb. (2 @ 6 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
| PT4450 A/B1* | ASTM Method | |
| Color | Black | Visual |
| Mixed Viscosity, @ 77F, centipoise | 4,500 cps | D2393 |
| Cured Hardness, Shore D | 88 Shore D | D2240 |
| Shrinkage, in./in., Mold #2, Volume: .344 Gal. | .0001 | D2566 |
| Density lb./cu. inch, lb./gallon | .0546, 12.6 | D792 |
| Specific Volume, cu. in./lb | 18.3 | D792 |
| Tensile Strength, psi | 8,600 psi | D638 |
| Flexural Strength, psi | 12,200 psi | D790 |
| Compressive Strength, psi | 13,500 psi | D695 |
* These properties were developed with PT4450 B1 Hardener, and are typical of PT4450’s performance.
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.