Polyurethane Casting Resins
Due to their nature, polyurethane resins are ideal for shorter product life cycles and development times. Examples of this are ebalta’s machine casting compounds for rapid prototyping, rapid tooling and series production. Similar to thermoplastic materials (rubber, PE, PP, ABS, PC etc.), they perform very well due to their geometric flexibility, temperature resistance and high E-module.
PU resins can be used very well and easily for the production of large-volume parts, because they can easily be moulded. Since rapid changes in the production process can be made at any time with little effort, investment costs are low.
The many ways in which ebalta can develop the product sustainably make a strong argument for the use of PUR resins anyway: On the one hand, through the use of recycled polyols and renewable raw materials. On the other hand, due to the low weight compared to other materials. But also through material savings due to the high abrasion resistance. Therefore, new polyurethane developments from ebalta are available on request as a carbon-neutral product.
Tooling Cast Resins
For decades, they have been a standard in model making and in mould and tool making: the hard and hard-elastic modeling casting resins and the filled and unfilled fast casting resins from ebalta. Properties such as fast, precise, eco-friendly and cost-effective characterise them, and at the same time they are easy and economical to process.
ebalta PU casting resins meet the individual requirements of models, core boxes and mould boards. When cast, they are highly abrasion-resistant and dimensionally accurate. Due to their low exotherm, they can be cast in very large volumes.
The ebalta modelling casting resins, such as the SG 130 fast casting resins or the GM 987 hard-elastic casting resins, are firmly established in mould making.
| Product | Pot life 200 g/20°C | Shore hardness | ||
|---|---|---|---|---|
| GM 708 / PUR 4 | 45 - 60 min. | D 82 ± 3 | ||
| GM 727 / Comp. A+B | 25 - 35 min. | D 90 ± 3 | ||
| GM 979 / PUR 1 | 25 - 35 min. | D 90 ± 3 | ||
| GM 984-1 / Comp. A+B | 30 - 45 min. | D 65 ± 2 | ||
| GM 984-2 / Comp. A+B | 17 - 20 min. | D 65 ± 2 | ||
| GM 986-2 / Comp. A+B | 13 - 18 min. | D 68 ± 2 | ||
| GM 987-2 / Comp. A+B | approx. 13 min. | 65 ± 2 | ||
| HFG / PUR 11 | 7 - 9 min. | D 74 ± 2 | ||
| SG 130 / PUR 11 | 2.5 - 3.5 min. | D 72 ± 2 | ||
| SG 130 L / PUR 11 | 5 - 7 min. | D 67 ± 2 | ||
| SG 131 / PUR 11 | 9 - 15 min. | D 72 ± 2 | ||
| SG 197 / Comp. A+B | 4 - 6 min. | D 65 ± 3 | ||
| SG 2000 / Comp. A+B | 2.5 - 3.5 min. | D 72 ± 2 | ||
| SG 2000 L / Comp. A+B | 7 - 8 min. | D 72 ± 2 | ||
| SG 2000 S / Comp. A+B | 1.5 - 2.5 min. | D 72 ± 2 | ||
| SG 2015 / Comp. A + B | 10 - 15 min. | D 70 ± 3 | ||
| SG 700 / PUR 5 | 5 - 6 min. | D 83 ± 3 | ||
| SG 700 A / PUR 5 | 5 - 7 min. | D 83 ± 3 |
| PU surface resins | Heat resistance (HDT) | ||
|---|---|---|---|
| OH 11 – hard / PUR 1 | 70 ± 2 °C | ||
| OH 11 / PUR 3 | 70 ± 2 °C | ||
| OH 49-1 / Comp. A+B | - |
Elastomer Casting Resins
The ebalta PU elastomers were specially developed for high requirements in mould making and for the production of elastic parts in small series. Applications for polyurethane elastomers in mould making are, for example, in the tyre and concrete industries. In addition, PU elastomers are also used in scenery construction and for moulding artwork that require absolute attention to detail. Because of their high dimensional accuracy and good tear resistance, the elastic moulds are particularly well suited for this purpose. All ebalta elastomers as well as the vacuum resins can be used as casting resins for the vacuum process.
Furthermore, the ebalta elastomer casting resins are characterised by a high chemical resistance, low water absorption, good flow behaviour and good self-venting.
| Product | Shore hardness | Pot life 200g/20°C | ||
|---|---|---|---|---|
| GM 956 / GM 956-30 | A 30 ± 2 | 20 - 30 min. | ||
| GM 956 / GM 956-45 | A 45 ± 3 | 25 - 35 min. | ||
| GM 956 / GM 956-60 | A 60 ± 5 | 20 - 30 min. | ||
| GM 956 / GM 956-70 | A 70 ± 3 | 15 - 20 min. | ||
| GM 956 / GM 956-80 | A 83 ± 3 | 15 - 20 min. | ||
| GM 956-90 / Comp. A+B | A 90 ± 3 | 18 - 22 min. | ||
| GM 965-40 / Comp. A+B | A 43 ± 3 | 15 - 20 min. | ||
| GM 965-55 / Comp. A+B | A 55 ± 3 | 15 - 20 min. | ||
| GM 965-70 / Comp. A+B | A 70 ± 3 | 15 - 20 min. | ||
| GM 968 / Comp. A+B | A 55 ± 3 | 25 - 35 min. | ||
| GM 971-75 / Comp. A+B | A 78 ± 3 | 7 - 9 min. | ||
| GM 971-85 / Comp. A+B | A 86 ± 3 | 4 - 5 min. | ||
| GM 973 / Comp. A+B | A 90 ± 3 | 12 - 15 min. |
Resins for Vacuum Casting
Vacuum casting is the process of choice for parts with complex geometries. Prototypes and small quantities can be produced quickly, cost-effectively and to a high quality with the polyurethane machine casting resins from ebalta. The ebalta polyurethane resin systems are used to produce parts with properties similar to those of thermoplastic materials or elastomers. In addition, vacuum casting resins are also available with flame retardant properties according to UL 94 V0, or a classification according to DIN EN 45545-2: 2013-08 class R24 HL2 and RoHS compliant. The polyurethane machine casting resins have a high heat resistance and long pot lives.
All ebalta elastomers can also be used as vacuum casting resins.
| Product | Flexural modulus | Heat resistance | ||
|---|---|---|---|---|
| MG 703 / Z 400 | 1340 ± 150 MPa | 81 ± 3 °C | ||
| MG 707 / Z 400 | 1500 ± 200 MPa | 107 ± 3 °C | ||
| MG 804 / Comp. A+B | 2270 ± 150 MPa | 71 ± 2 °C | ||
| MG 804 / MG 804-1 | 1975 ± 150 MPa | 82 ± 3 °C | ||
| MG 804 GF / MG 804-1 | 4400 ± 400 MPa | 76 ± 3 °C | ||
| MG 804, 804 GF / MG 804-1 | 2600 ± 150 MPa | 89 ± 3 °C | ||
| MG 807 FR / Comp. A+B | 3700 ± 100 MPa | 62 ± 2 °C | ||
| MG 815 / Comp. A+B | 2100 ± 200 MPa | 130 ± 3 °C | ||
| MG 815 / MG 815 FR | 2770 ± 250 MPa | 120 ± 3 °C |
Resins for RIM
With ebalta machine casting resins, high-quality, complex parts can be produced using the low-pressure RIM process (RIM: Reaction Injection Moulding). In this way, parts are produced in the RIM process within the shortest possible time. Short demoulding times also allow the production of small and medium-sized series.
In contrast to a thermoplastic injection mould, the RIM mould is less stressed. The polyurethane tooling boards ebaboard 1400 and PW 920 are highly suitable for fast RIM mould production.
A prime example of RIM resins is the MG 453 GF machine casting resin from ebalta (MG = machine casting resin, GF = glass fibre). It has proven itself in use for e-mobility in the automotive sector. The MG 453 GF resin is a high-performance, glass-filled RIM system that is characterised by a very quick curing time.
| Product | Flexural modulus | Heat resistance | ||
|---|---|---|---|---|
| MG 321 FR-S / Comp. A+B | 2000 ± 100 MPa | 120 ± 3 °C | ||
| MG 331 FR / Comp. A+B | 2710 ± 100 MPa | 120 ± 3 °C | ||
| MG 425 / PUR 19 | 1550 ± 150 MPa | 73 ± 2 °C | ||
| MG 426 / Comp. A+B | 2185 ± 100 MPa | 95 ± 3 °C | ||
| MG 453 / Comp. A+B | 1640 ± 50 MPa | 102 ± 5 °C | ||
| MG 453 GF / Comp. A+B | 2510 ± 250 MPa | 108 ± 5 °C |
Polyurethane Casting Foam
ebalta polyurethane casting foams are usually used for moulding parts, as core material or for bases. The polyurethane foams are characterised by their very good surface structure and fluidity as well as their good heat resistance.
A true breakthrough in development is the flame-retardant polyurethane foam PU 61 FR. It can be found in insulation, multi-layer structures and lightweight panels and can be used in construction, the film industry and passenger transport as well as in hotels and renovation projects.
Due to its low density, the self-extinguishing casting foam can be used particularly well in applications where a low weight is required. The two-component polyurethane casting foam PU 61 FR is used to produce panels in sandwich construction. During processing, it starts foaming after only 20 seconds and has a pot life of 2-3 minutes. Demoulding is quick and easy after approx. 30 minutes.
| Product | Density cured | ||
|---|---|---|---|
| PU 05 casting foam | 50 g/l | ||
| PU 10 casting foam | 100 g/l | ||
| PU 20 casting foam / Comp. A+B | 200 g/l | ||
| PU 61 FR | 60 g/l |
Electrical Encapsulation
The PU electrical encapsulation resins from ebalta are used as encapsulation for electronic parts such as cable terminations, condensers, transformers or coils. They provide effective protection against the effects of moisture or dirt. Due to their distinct thermal and mechanical properties, ebalta polyurethane electrical encapsulants can also withstand stresses such as thermal cycling very well.
The product range also includes the filled, low-viscosity casting resin ebalta EGM-PU-21/30, formulated with non-abrasive fillers. It has been tested and approved according to UL Standard 94 flammability-test and the flame retardant is halogen-free.
Another example is the unfilled PU electro casting resin ebalta EGM-PU-02, which can be cast both in a vacuum and under normal pressure.
Sustainable Climbing Holds Resins
In close cooperation with allHOLDS, a network of independent climbing hold manufacturers, ebalta has developed a casting resin made from ECO-friendly polyurethane. It consists of over 40 percent raw materials from renewable sources and is suitable for climbing holds that comply with DIN EN12572-3:2017. The environmentally friendly PU casting resin is certified as a climate-neutral product through CO2 offsetting. Emissions that occur until disposal are offset by investments in meaningful climate protection projects.
The sustainable climbing hold casting compound has the following advantages:
- High abrasion resistance, so that the grip lasts a long time
- Easy implementation of individual and sophisticated design ideas
- Material savings thanks to thin wall thicknesses, resulting in lower costs, less waste and also less weight during transportation.
For individual design, we recommend our large selection of ebalta color pastes. Our ebalta silicones are perfect for the production of casting molds. We also have extensive know-how and are happy to provide support in the areas of mould construction, processing, machine casting and production optimization.
For more information on duranity, please go to www.duranity.com/en
| Product | Gel time 200 g/20°C | ||
|---|---|---|---|
| GM 1914 L+S / Comp. A + B | L: 8-10 Min. / S: 2-3 min. | ||
| GM 2310 L+S / Comp. A + B | L: 8-10 min. / S: 2-3 min. |
