Method for producing an object from a precursor, and use of a radically crosslinkable resin in an additive production method

US11590692B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Dirk Achten · Leverkusen, DE
• Thomas Büsgen · Leverkusen, DE
• Jörg Tillack · Bensberg, DE
• Michael Ludewig
• Christoph Tomczyk · Leverkusen, DE
• Roland Wagner · Feldkirchen-Westerham, DE

Key dates

• Filing date: Nov 14, 2017
• Grant date: Feb 28, 2023
• Expiry date: Mar 23, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2475/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for producing an object from a precursor comprises the steps of:I) depositing a free-radically crosslinked resin atop a carrier to obtain a ply of a construction material joined to the carrier which corresponds to a first selected cross section of the precursor;II) depositing a free-radically crosslinked resin atop a previously applied ply of the construction material to obtain a further ply of the construction material which corresponds to a further selected cross section of the precursor and which is joined to the previously applied ply;III) repeating step II) until the precursor is formed;IV) treating the precursor obtained after step III) under conditions sufficient to at least partially trimerize to isocyanurate groups NCO groups present in the free-radically crosslinked resin of the obtained precursor to obtain the object.