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Reactive modifiers

Boost your 3d printing materials

NANO AND SILICONE TECHNOLOGY


Evonik is one of the leading manufacturers of reactive modifiers. Silica based nanoparticle composites and silicone rubber modified products boost the performance of 3d printed products. They can be used in numerous 3d printing technologies like stereolithography and material jetting. 


Nano composites - tiny particles, huge effects

We offer modifiers that improve edge sharpness as well as fracture toughness of 3D printed materials. These silica based nanoparticle composites enable clear, UV-curable formulations with a very high modulus for use in stereolithography and material jetting applications, while not compromising the viscosity due to their narrow particle size distribution.

With a diameter of only 20 nanometers the surface-modified, agglomerate-free silica particles can be easily mixed with reactive resin matrices based on epoxy resins or acrylics. The matrices may contain up to 50% w/w of the spherical silica particles and still will stay low viscous and crystal clear.

Incorporation of the liquid composites in formulations is easy. They can be easily mixed with classical fillers. Due to their excellent processability the silica based nanoparticle composites will not form agglomerates or sediments.

Evonik provides a variety of solutions to improve your 3D printing materials and processes. The nanosilica particle filled resins NANOCRYL® and NANOPOX® lend superior properties to 3D printing materials. The reactive modifiers significantly reduce shrinkage resulting in improved edge sharpness and very high accuracy. In their role as a functional additives NANOCRYL® and NANOPOX® improve the modulus and the fracture toughness of 3d printed products. 

Silicone rubber modified products

If a thermoplastic look & feel of the 3d printed object is desired, our silicone rubber modified products are the right choice. Improved snap fit and fracture toughness are additional features of our ALBIDUR® modifiers. 

The functional additive contains up to 40% w/w of micron-sized silicone rubber particles in reactive resin matrices like epoxy resins. The low viscous liquids are especially suitable to manufacture products with a opaque or milky appearance.

Stereolithography (SLA) was the first rapid prototyping process and today still is one of the most widely used rapid prototyping technology. It can produce highly accurate and detailed polymer parts. Evonik is a leading manufacturer of modified resins for 3D printing, which will help you to harness the full power of the SLA technology. This is the prerequisite to leave rapid prototyping and enter rapid manufacturing.

The technique of stereolithography has been known for a long time and features a very high accuracy of the 3D printed object. It results in gorgeous looking models with impeccable surface quality in no time. So it comes with no surprise, that typical applications in the industry include modelling Formula 1 racecar parts for wind tunnel testing. More mundane applications include the manufacturing of individualized hearing aids and dentures or investment casting in jewelry and arts.

SLA converts liquid materials into solid parts, layer by layer, by selectively curing them by vat photopolymerization. To initiate the curing process, a highly focused UV laser traces out successive cross-sections of a 3d object in a vat of liquid photosensitive polymer. The photopolymer hardens instantly when the UV laser touches it, forming the first layer of the 3D-printed object. Once a layer is completed, the platform is lowered by a distance equal to the layer thickness. The next layer is formed on top of the previously completed layer. This process is repeated until the build is complete. Afterwards, the 3d printed object has to be freed from possible support structures. Usually it is baked in a UV oven as well, to complete the polymerization. 

Available for around 30 years, even nowadays SLA remains one of the most powerful and versatile of all techniques. It has the highest fabrication accuracy and an increasing number of materials that can be processed is becoming available. However, SLA only works with photopolymers which are not stable over time and have not well defined mechanical properties. This is why there are open challenges in optimizing material properties, namely mechanical strength and surface characteristics. 

Using modified resins for 3D printing made by Evonik can help you to overcome many of these limitations. By using our nanosilica particle filled resins NANOCRYL® and NANOPOX® you can significantly reduce shrinkage resulting in improved edge sharpness and very high accuracy. By using ALBIDUR® you will add fracture toughness to your formulated product while generating a thermoplastic look and feel which is desired for many component parts.

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Material jetting creates objects in a similar method to a two dimensional ink jet printer. The technique is particularly versatile: Multi-material and full-color printing is straightforward and widely used. Nanosilica particle filled resins made by Evonik significantly improve edge sharpness and accuracy. 

Material jetting is just like an ink jet printer forming layers that are instantly UV-cured. Material jetting is the only additive manufacturing technology that can combine different print materials within the same 3d printed model in the same print job. However, as material must be deposited in drops, the number of materials available to use is limited. Polymers and waxes are most commonly used. 

By printing different materials at the same time, mixed material properties can nevertheless be achieved. These range from rigid to rubber-like, from transparent to opaque or materials with ABS-simulating performance. Often a gel-like support material is required for successful printing of complicated geometries. It needs post-processing to be removed.

Material Jetting is ideal for creating realistic visual and haptic prototypes with very smooth surfaces that resemble injection molded parts. Casting patterns are produced with very good accuracy and surface finishes as well.

Boosting the performance of jetting materials

There are still open challenges in optimizing material properties, namely mechanical strength and surface characteristics. 

Evonik manufactures nanosilica particles that, used in material jetting formulations, can significantly improve a wide range of properties of 3D printed products. NANOCRYL® optimizes the quality of acrylic resins. The nano-scale silica particles enable the production of 3d printed products with improved edge sharpness as well as fracture toughness. 

NANOPOX® is used as a constituent in epoxy resins to enable superior mechanical properties of material jetting formulations. The surface-modified, agglomerate-free silica particles with a diameter of approx. 20 nm significantly reduce shrinkage resulting in improved edge sharpness and high accuracy of the printed products.

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More additives, like dispersing aids, flow enhancers, etc. can be found on our 

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