Altropol NEUKADUR® MultiCast 11 – Impact-Resistant Polyurethane Casting Resin Shore D 75 for Parts & Prototypes

Premium Impact-Resistant Polyurethane Casting Resin for Professional Parts and Prototypes

Altropol NEUKADUR® MultiCast 11 is a very high-quality two-component polyurethane fast-casting system that, with NEUKADUR Hardener ISO 1, cures at room temperature (above 18 °C) to a beige, hard and extremely impact-resistant end product with a hardness of Shore D 75. You mix resin and hardener 100 : 100 by weight. The mixture has a viscosity of approx. 600 mPa·s and a pot life of approx. 5 minutes (100 g, 25 °C). Unfilled, a casting of 4 to 5 mm can be demoulded after approx. 14 hours at 25 °C. The impact strength is 50 kJ/m² unfilled and rises to 150 kJ/m² through post-curing (8 hours at 80 °C); the heat deflection temperature increases from 55 to 67.5 °C. For layers thicker than 5 mm, add NEUKADUR Füller B: filled, you achieve Shore D 85 with a linear dimensional change of only 0.20%. MultiCast 11 is suitable for producing parts, for moulds and models of all kinds and for prototyping.

Professional use: mandatory diisocyanate training

The hardener (NEUKADUR Hardener ISO 1) contains diisocyanates. Since 24 August 2023, this product may only be processed in industrial or professional use by staff who have completed the mandatory training on working safely with diisocyanates (REACH Annex XVII, entry 74). Companies can register their staff via safeusediisocyanates.eu. You can find more information on our page working safely with polyurethane and diisocyanates.

Key Benefits

• Impact strength 50 kJ/m² (150 kJ/m² after post-curing): extremely impact-resistant in unfilled form – ideal for functional parts that have to withstand knocks and drops.
• Shore D 75 with 19% elongation: hard yet tough – with a tensile strength of 32 MPa and a flexural strength of 48 MPa.
• HDT 55 °C, 67.5 °C after post-curing: post-curing also increases the heat deflection temperature – better resistance to heat in use.
• Mix ratio 100 : 100 by weight: easy to weigh – less risk of mixing errors.
• Pot life approx. 5 minutes: fast system – suitable for small series and rapid production.
• Filled linear dimensional change 0.20%: low shrinkage with NEUKADUR Füller B – dimensionally stable thicker castings up to Shore D 85.

Typical Applications

• Production of functional, impact-resistant parts
• Moulds and models of all kinds
• Prototyping and replicas
• Small series of parts that have to withstand knocks and drops
• Thicker, dimensionally stable castings in combination with filler

Processing Instructions:

1. Stir NEUKADUR MultiCast 11 thoroughly before use until it looks homogeneous; also stir or shake the hardener well.
2. Make sure the mould and parts are completely dry and free of release agent that has not yet flashed off; polyurethane reacts with moisture.
3. Weigh resin and hardener in a ratio of 100 : 100 by weight and mix both components quickly and thoroughly at room temperature (above 18 °C).
4. Pour the mixture into the mould in a steady stream within the pot life of approx. 5 minutes and avoid trapping air.
5. Demould unfilled after approx. 14 hours at 25 °C (4 to 5 mm wall thickness).
6. If you cast thicker than 5 mm, use NEUKADUR Füller B: 100 parts resin, 100 parts hardener and 200 parts filler, preferably divided between both components. Filled, you have approx. 4 minutes pot life and demould after approx. 10 hours (4 to 5 mm) or 3.5 hours (30 to 40 mm).
7. For maximum impact strength and heat resistance, post-cure the unfilled casting for 8 hours at 80 °C. Do not use an oven that you will later use to prepare food.

Store resin and hardener in the tightly closed original packaging at 20 to 25 °C, dry, and use opened containers as quickly as possible. The shelf life is stated on the label; the first two digits of the batch number indicate the week, the third digit the year. You can also fill the resin with our filler for polyurethane.

Manufactured by Altropol Kunststoff GmbH, a German specialist in polyurethane and epoxy systems for mould and model making.

Professional Support

MultiCast 11 is the impact-resistant choice within the MultiCast range for functional parts. Not sure whether MultiCast 11 suits your part or mould, or whether post-curing is necessary for you? Email us at info@siliconesandmore.com and we will be happy to help.