Radiation-curable composition containing mercapto-functional polyorganosiloxanes for additive-manufacturing technology

US12071544B2 · kind B2 · utility

Assignee

• Solventum Intellectual Properties Company · US

Inventors

• Henning Hoffmann · Windach, DE
• Peter U. Osswald · Bohmte, DE

Key dates

• Filing date: Feb 17, 2020
• Grant date: Aug 27, 2024
• Expiry date: May 29, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/28
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a radiation-curable silicone composition for additive-manufacturing technology comprising mercapto-functional polyorganosiloxane(s) as Component A, organosiloxane(s) with at least two aliphatic unsaturated carbon-carbon moieties as Component B, photo-initiator(s) as Component C for initiating a curing reaction between Component A and Component B, dye(s) as Component D dissolved in mercapto-functional polyorganosiloxane(s) as Component E, the mercapto-functional polyorganosiloxane(s) having a fraction of (mercaptoalkyl)methylsiloxane units of at least 50 mol %, wherein Component D is dissolved in Component E before Component D is combined with the other components of the radiation-curable silicone composition. The invention also relates to a process of producing a radiation-curable composition wherein the process comprises the steps of providing a solution of dye(s) in a composition comprising mercapto-functional polyorganosiloxane(s) having a fraction of (mercaptoalkyl)methylsiloxane units of at least 50 mol %, combining the solution containing the dye(s) dissolved in the mercapto-functional polyorganosiloxane(s) with mercapto-functional polyorganosiloxane(…