GTP Ultra 850
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Description GTP Ultra 850 is a rigid urethane polymer specifically formulated with long working life to produce prototype parts from low cost tooling. Long working and low exotherm permit large deep section castings to be made. GTP Ultra 850 has the unusual quality of high hardness without “glassy” brittl eness. Silicone polyurethane epoxy molds can be used. Cured parts have the look and feel of therm o-plastic. 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 Ultra 850 is well suited for hand or machine mixing.
Application GTP Ultra 850 is designed for making prototype and limited run production parts. Work in a well ventilated area and use clean, dry tools for mixing and applying. Combine the resin and hardener a c-cording to mix ratio. Mix together thoroughly and use immediately after mixing. Material temper ature 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 Ultra 850 Part A: Warning! Harmful if inhaled when heated to above 200° F. May cause skin and eye irritation. May cause allergic skin and clothing. Avoid breathing vapor or mist (only when heated to above 2 00° F). Avoid prolonged or repeated contact with skin. Keep container closed. Use part B of GTP Ultra 850 with adequate ventilation. Wash thoroughly after handling.
GTP Ultra 850 Part B: Causes eye irritation. Harmful if swallowed. Do not get into eyes, on skin, or on clothing. Avoid breathing vapor or mist. Keep containers closed. Use part B of GTP Ultra 850 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 mold or co ntainer can also be factors in the temperature profile of a mixed system. The cooler system is allowed to cure, the less shrinkage produced.
Mix Ratio Reaction ratio 100 parts A to 82 parts B by weight. 100 parts A to 100 parts B by volume. This sy stem 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 Ultra 850. Mold design and construction allow pressure-free casting.
| Typical Properties Viscosity | Specific Gravity | Weight Per Gallon | |
|---|---|---|---|
| Component A 350 cps Component B 450 cps Mixed 400 cps | 1.26 1.03 1.15 | 10.53 lb. 8.60 lb. 9.56 lb. | |
| Mixing Ratio By volume By weight | 100 parts A to 100 parts B 100 parts A to 82 parts B | ||
| Work life Demold time Set time and Demold depend on temp | 20 minutes @ 72° F 45-60 minutes @ 72° F erature and relative humidity | ||
| Physical Properties Test Method | Value | ||
| Hardness Tensile strength Elongation Tear resistance (lb/in) Cured density (gram/inch) Shrinkage (mass casting of 100lb) | ASTM 2240 N/A N/A D638 @ 0.2”/min, Type I | 80 Shore D 7500 2 % 1590 18.79 .0014/inch | |
(Smaller casting will have less shrinkage)
Color Cream Beige
Shelf Life GTP Ultra 850 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 Ultra 850 is available in convenient 2-quart, 2-gallon, 10-gallon, 60-gallon and 100-gallon kits. GTP Ultra 850 has a non-hazardous rating for shipping.