German speciality chemicals company Brüggemann GmbH is offering its reactive chain modifiers to help improve the quality of recycled polyamides.
The Bruggolen M series of modifiers allow the precise and reproducible adjustment of relative viscosities, by either lengthening excessively short chains or shortening those which are too long, the Heilbronn-based company explained in a release.
Bruggolen TP-M1417 helps shorten the excessively long molecular chains of high viscosity polyamide waste found in materials such as high viscosity extrudates, films or cast nylon.
Used in a single extrusion step, the modifier decreases the viscosity so that the polymer can be injection moulded – with the final viscosity accurately controlled by adjusting the quantity added.
To address the reduction in molecular weight resulted from degradation during processing and previous use, the company offers Bruggolen M1251, a linear chain extender that is also available in a smaller pellet size under the name Bruggolen M1253, making it easier for dosing during compounding.
Both modifiers are supplied as dust free polymeric granules and are easy to process and to disperse in the polyamide matrix, according to Brüggemann.
Needed in small doses, the modifiers are claimed to help processors tailor relative viscosities to their needs in a single compounding step.
According to Brüggemann, the upcycled materials produced with the modifiers exhibit “excellent mechanical properties and are suitable for the same applications as prime materials of similar viscosities.”
This removes the need to blend the recyclate with prime polymers and opens up new possibilities for secondary polyamide raw materials which meet the quality requirements of the moulding industry.
Th Bruggolen M series also covers long-term heat stabilisers, processing stabilisers, flow enhancers, nucleating agents and other auxiliaries.
Brüggemann offers modifiers for upcycling polyamide waste
