Download Foundry Tooling Brochure - Ebalta

Polyurethane casting resinsPolyurethanes possess a wide range of properties, from very abrasion resistant elastomers to high-strengthcasting resins. Their low exothermic reactivity makes them dimensionally accurate and castable at highvolumes. ebalta also offers nontoxic, very abrasion resistant elastomers.MaterialHardenerColourMixing ratio (p. b. w.)ApplicationsMaterial propertiesProcessing dataViscosity at 25°C (mPas)Density at 20°C (g/cm 3 )Pot life 200 g /20°C (min.)Curing time at RT (hrs.)Physical dataFlexural strength (MPa)Flexural modulus (MPa)Compressive strength (MPa)Impact resistance (Charpy)(kJ/m 2 )Heat resistanceHDT DIN EN ISO 75 B (°C)Shore hardness (Shore D)Coefficient of thermalexpansion (10 -6 K -1 )Abrasion (Taber) (mg)Type/Application wt./RotationsGM 708PUR 4brown100 : 75Foundry patterns,negativesunfilled,slow curing,high filler contentpossible500 ± 1001.20 ± 0.0345-6016-24110 ± 102250 ± 25080 ± 858 ± 876 ± 382 ± 3---GM 725-7PUR 13beige100 : 15Foundry patterns,pattern plates,core boxes, negativescastable in highvolumes, high dimensionalaccuracy, goodflow properties, wellworkable, long pot life6000 ± 5001.75 ± 0.0540-5012-1656 ± 58025 ± 80076 ± 83.6 ± 0.551 ± 287 ± 3approx. 52--GM 974Comp. Breddish transparent100 : 65Core boxes,foundry patterns,pattern platesvery abrasionresistant,hard flexible2800 ± 5001.09 ± 0.0220-2510-12-----60 ± 3-approx. 27H 18 / 500 / 500GM 975Comp. Bwhite100 : 36Foundry patterns,pattern plates,core boxesvery abrasionresistant,very hard flexible6500 ± 7001.07 ± 0.0112-158-10-----70 ± 3-approx. 10H 18 / 500 / 500VP GM 995Comp. Bbeige100 : 60Core boxes,foundry patterns,pattern platesvery abrasionresistant,hard flexible,very well castable,nontoxic950 ± 2001.12 ± 0.0319-2314-16-----68 ± 3-approx. 25H 18 / 500 / 50014Pattern made of GM 725-7Pattern made of GM 725-7