Patent · US Active

Process of processing a radiation-curable thiolen based composition with additive-manufacturing technology

US11591438B2 · kind B2 · utility

1Cited by

4References

13Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Henning Hoffmann · Windach, DE
Peter U. Osswald · Bohmte, DE
Joachim W. Zech · Kaufering, DE

Key dates

Filing date	May 20, 2019
Grant date	Feb 28, 2023
Priority date	—
Expiry date	Feb 11, 2040

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB33Y70/10
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The invention relates to a process of processing a radiation-curable composition with an additive-manufacturing technique comprising a radiation-curing step, the radiation-curable composition comprising mercapto-functional Component A comprising at least three mercapto moieties, crosslinker Component B with at least three vinyl or allyl moieties, photo-initiator(s) Component C for initiating a curing reaction between Component A and Component B, wherein the radiation-curable composition does not comprise urethane (meth)acrylate oligomers in an amount of more than 4 wt. % with respect to the whole composition. 3-dim articles which can be produced are typically transparent and have adequate mechanical properties. The radiation-curable composition is in particular useful for producing clear-tray aligners for dental and orthodontic purposes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.