Powder bed 3D printing process for producing elastic shaped body composed of silicones, and silicone resin-containing powder suitable for the process

US12421422B2 · kind B2 · utility

Assignee

• UNIVERSITÄT ROSTOCK · DE

Inventors

• Justin Jannis Kröger · Rostock, DE
• Jorg Harloff · Rostock, DE
• Axel Schulz · Emmelshausen, DE
• Hermann Seitz · Rostock, DE
• Christian Polley · Rostock, DE

Key dates

• Filing date: Mar 14, 2022
• Grant date: Sep 23, 2025
• Expiry date: Mar 14, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/70
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Powder bed 3D printing processes for producing elastic molded silicone articles and silicone resin-containing powders suitable for the processes are provided. The processes comprise: a) layer-by-layer spreading of a powder in a powder bed 3D apparatus, wherein the powder contains a silicone resin of formula (I); b) applying a crosslinker solution to the layer of a) according to a printing pattern for the elastic molded article, wherein the crosslinker solution comprises a hydrosilylation catalyst and a silicone oil of the general formula (II); c) repeating a) and b) according to the printing pattern for the elastic molded body; and d) removing of the non-crosslinked powder.