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CCr™ 204 EU /7,2 kg

Crystal Clear™ 204 EU es un transparente blanco agua y está hecho específicamente para aplicaciones que requieren claridad. Estas resinas rígidas de colada de uretano difieren únicamente en los tiempos de trabajo y de desmoldeo. La baja viscosidad asegura una fácil mezcla y vertido. Las resinas Crystal Clear™ curan a temperatura ambiente* con una contracción insignificante.

Relación de mezcla por peso 100A : 90B - vida útil 2 horas - tiempo de curado 48 horas - dureza Shore 80D - Color transparente

PRECAUCIÓN: NO PARA USO DOMÉSTICO. ESTE PRODUCTO ES SÓLO PARA USO INDUSTRIAL. Con ventilación de escape local adecuada, normalmente no se requiere protección respiratoria cuando se usa este producto. Cuando la evaluación de riesgos muestre que los respiradores purificadores de aire son apropiados, siga las regulaciones de respiradores de OSHA y las normas europeas EN 141, 143 y 371. Se requiere ropa protectora (guantes y mangas largas) para minimizar el riesgo de sensibilización dérmica. Si la respiración se ve afectada o se desarrolla una erupción dérmica, deje de usar este producto inmediatamente y busque atención médica. Leer SDS antes de usar

Instructions

Safety - Store and use at room temperature 23°C. These products have a limited shelf life and should be used as soon as possible. Environmental humidity should be as low as possible. Good room size ventilation is essential. Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Wearing a NIOSH approved respirator will minimize inhalation of residual fumes. Use in a low humidity environment (below 50% RH). Mixing containers should have straight sides and a flat bottom. Mixing sticks should be flat and stiff with defined edges for scraping the sides and bottom of your mixing container.

Selecting A Mold Rubber - Pour into a urethane rubber mold (Vytaflex™ urethane – release agent required), tin cured silicone mold (Mold Max™ silicone) or Mold Star™ 15, 16 or 30 platinum cured silicone (not Mold Star™ 20T). Do not use other rubber mold products.

If using Mold Max™ silicone; to prevent cure inhibition, post-cure newly cured silicone mold for 8 hours at 60° C and let cool prior to casting resin. If you are unsure about surface compatibility, a small scale trial casting should be made.

For Best Results Before Pouring Crystal Clear™ Into Mold: Pre-heat rubber mold at 100°C for 4 hours. This will minimize chances of fish-eyeing, suck back, corner rounding, large bubbles, etc. in finished casting.

Casting Thickness & Cure Time - The cure time and ultimate shrinkage of all Crystal Clear™ products will vary depending on mass concentration, thickness of the casting, mold configuration, etc. For example, a 200 gram mass of Crystal Clear™ 200 will cure faster if left to cure in a conical vessel (cup) versus a casting dispersed as a thin sheet measuring 3 centimeters square by 1 mm thick. This is due to the heat generated by the concentration of material in the cup versus heat that is dissipated from the sheet casting. Castings will resist yellowing when exposed to UV, but may darken over time.

- Crystal Clear™ 200 is intended for a casting thickness ranging from 1 cm to 7,62 cm at a casting weight maximum of 7.25 kg Castings greater than 7,62 cm should be layer cast.
- Crystal Clear™ 202 is intended for casting in thin sections. Developed for casting thicknesses of no more than 1 cm
- Crystal Clear™ 204 can be cast in thicknesses up to 15,24cm at a casting weight maximum of 15.88 kg
- Crystal Clear™ 206 is for castings greater than15,24 cm. Crystal Clear™ 206 castings greater than 1 cm can be demolded after 48 hours and left to fully cure outside the mold. Castings less than 1 cm should be left - to cure in the mold for 7 days.

MEASURING & MIXING...

Liquid urethanes are moisture sensitive and will absorb atmospheric moisture. Mixing tools and containers should be clean and made of metal or plastic. Materials should be stored and used in a warm environment 23°C. Stir or shake Part B thoroughly before dispensing.

Measuring - Materials should be stored and used at room temperature 23°C The proper mixing ratio is 100A:90B by weight. You must use an accurate digital gram scale to weigh Parts A and B properly. Do not use an analog scale or attempt to measure components by volume. Dispense the required amount of Part A into a mixing container. Weigh out the appropriate amount of Part B and combine with Part A.

Mixing - Mix SLOWLY, but thoroughly, for at least 90 seconds making sure that you scrape the sides and bottom of your container several times. If coloring or filling Crystal Clear™ product, add filler or pigment dispersion to Part B and mix thoroughly before adding Part A.

Bubbles in the finished casting will be greatly reduced by vacuum degassing prior to pouring. Your vacuum pump must pull a minimum of 1 Bar / 100 KPa. Leave enough room in container for material expansion. Vacuum material until it rises, breaks and falls. Vacuum for 1 minute after material falls.

POURING, CURING & PERFORMANCE...

Pouring -
If casting Crystal Clear™ into a rubber mold, pour mixture in a single spot at the lowest point of the mold. If encapsulating an object, do not pour the mixture directly over the object. Let the mixture seek its level. A uniform flow will help minimize entrapped air.

For Best Results: Bubble elimination is best achieved by pressure casting. After pouring the mixed compound, the entire casting assembly (mold, dam structure, etc.) is placed in a pressure chamber and subjected to 60 PSI (4.2 kg/cm2) air pressure for full cure time prior to heat curing.

Castings will reach ultimate physical properties at room temperature in 7 days. Castings removed from mold before recommended cure may exhibit a tacky surface that can be eliminated by exposing casting to 65°C for 6 hours. Pot life and cure time depend on mass concentration and mold configuration.

Post Curing - Castings will achieve maximum physical properties, better heat and UV resistance if Crystal Clear™ is post cured. Post curing is recommended if castings are thin or of low mass concentration. Castings should be post cured in a mold or support structure. Post Cure Schedule: Allow the material to cure fully at room temperature followed by 6 hours at 65°C–72°C. Allow casting or part to cool to room temperature before demolding.

Because no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.

IMPORTANT:
Shelf life of product is reduced after opening. Remaining product should be used as soon as possible. Immediately replacing the lids on both containers after dispensing product will help prolong the shelf life of the unused product. XTEND-IT™ Dry Gas Blanket (available from Form X) will significantly prolong the shelf life of unused liquid urethane products.

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