GTP 6505 Rigid Urethane
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Description GTP 6505 is a rigid urethane polymer specifically formulated to produce prototype parts from low cost tooling. Silicone, polyurethane epoxy molds can be used. Cured parts have the look and feel of thermoplastic. The parts have high impact strength, thermal resistance and good dimensional stability. This system permits de-molding in 45 minutes to one hour, depending on configuration. GTP 6505 is best suited for hand mixing.
Application GTP 6505 is designed for making prototype and limited run production parts. Stir well before use. This material will separate. Work in well-ventilated are and use clean, dry tools for mixing and applying. Combine the resin and hardener according to mix ratio. Mix together thoroughly and use immediately after mixing. Material temperature should not be below 65° F (18° C) when mixing. If heating of product in plastic packaging is necessary, heat in a ventilated oven to 145° F maximum. Before heating, loosen the container lid slightly to relieve any pressure buildup and place container to be heated into a metal bucket of sufficient volume to contain the product, should the container tip over or leak. This product may crystallize upon storage. If crystallized, vent container and heat to 125-145° F until crystals dissolve. Store well after product has been liquefied.
Mix Ratio Reaction ratio 100 parts A to 100 parts B by weight. 85 parts A to 100 parts B by volume. This sytem is best suited for hand mixing. The long gel time makes hand mixing ideal.
Simple silicone, urethane or epoxy molds can be used for molding GTP 6505. Mold design and construction allow pressure-free casting. Work in a well-ventilated area and use clean, dry tools for mixing and applying. Combine the resin and hardener according to mix ratio. Mix together thoroughly and use immediately after mixing. Material temperature should not be below 65° F (18° C) when mixing.
Precautions: Do not use or handle this product until the Material Safety Data Sheet has been read and understood.
GTP 6505 Part A: Warning! Harmful if inhaled. Causes skin and eye irritation. Causes allergic skin and respiratory reaction. Avoid contact with eyes, skin and clothing. Avoid breathing vapor or mist. Keep container closed. Use part B of GTP 6505 with adequate ventilation. Wash thoroughly after handling.
GTP 6505 Part B: Causes eye irritation. Harmful if swallowed. Do not get in eyes, on skin, or on clothing. Avoid breathing vapor or mist. Avoid prolonged or repeated contact with skin. Keep container closed. Use part B of GTP 6505 with adequate ventilation. Wash thoroughly after handling.
Precautionary Note: Thermosetting systems generate heat when curing. The amount of heat and the period of time in
which heat is released vary significantly between systems. Additionally, ambient or compound temperature, amount of
material mixed, and construction or shape of the mild or container can also be factors in the temperature profile of a
mixed system. In some cases, the thermosetting reaction can be vigorous, generating heat sufficient to cause decomposi
tion of the system with subsequent liberation of large volumes of acid smoke. These facts are especially important
when using a rapidly reacting system such as the one described in this literature
Typical Properties Viscosity Specific Gravity Weight Per Gallon
| Component A Component B Mixed | 200 cps 2000 cps 1100 cps | 1.23 1.05 1.13 | 10.25 lb. 8.74 lb. 9.44 lb. |
| Mixing Ratio | By volume By weight | 85 parts A to 100 parts B 100 parts A to 100 parts B | |
| Work life Demold time | Set time and Demold depend | on temper | 5-8 minutes @ 77° F 45-60 minutes @ 77° F ature and relative humidity. |
| Physical Properties | Test Method | Value | |
| Hardness Tensile strength Elongation | ASTM 2240 N/A N/A | 80 Shore D 7573 8 % |
Tear resistance (lb/in) @0.2”/min, Type I D638 1590 Cured density (gram/inch) 18.55
Color Tan
Shelf Life GTP 6505 is shipped from the factory in sealed containers. The containers should be stored in a cool, dry area that is protected from direct sunlight and moisture. Storage temperatures should not exceed 80° F. The shelf life of factory sealed containers stored under these conditions is six months. Containers that have been opened should be resealed immediately after material has been removed in order to prevent solvent evaporation.
Packaging GTP 6505 is available in convenient 1-quart, 1.7-gallon, 8.5-gallon, 51-gallon and 95-gallon kits. GTP 6505 has a non-hazardous rating for shipping.