RADIATION CURABLE COMPOSITIONS FOR ADDITIVE FABRICATION WITH IMPROVED TOUGHNESS AND HIGH TEMPERATURE RESISTANCE

• Main Authors: SEURER, Brad, Kwisnek, Luke
• Format: Patent
• Language: English
• Published: 05.05.2022
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; APPARATUS SPECIALLY ADAPTED THEREFOR; CHEMISTRY; CINEMATOGRAPHY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTROGRAPHY; HOLOGRAPHY; MATERIALS THEREFOR; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; ORIGINALS THEREFOR; PERFORMING OPERATIONS; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Radiation curable compositions for additive fabrication with improved toughness are described and claimed. Such resins include a rubber toughenable base resin package and a liquid, phase-separating toughening agent. The rubber toughenable base resin, which may possess a suitably high average molecular weight between crosslinks and may be a pre-reacted hydrophobic macromolecule, may further include a cationically polymerizable component, a radically polymerizable component, a cationic photoinitiator, a free radical photoinitiator, and customary additives. Also described and claimed are methods for forming a three-dimensional objects using such radiation curable compositions for additive fabrication with improved toughness, along with the three-dimensional parts created therefrom.