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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12460086 B1

PDFFull Text
Date of Patent:
Nov. 04, 2025

Filed:

Jul. 08, 2021

Initiator molecule for a non linear absorption reaction, photopolymerisable composition that can be activated by biphotonic absorption and associated 3d printing method

Applicants:

Universite Claude Bernard Lyon 1, Villeurbanne, FR;

Centre National DE LA Recherche Scientifique, Paris, FR;

Ecole Normale Superieure DE Lyon, Lyons, FR;

Inventors:

Akos Banyasz, Lyons, FR;

Cyrille Monnereau, Maubec, FR;

Patrice Baldeck, Vizille, FR;

Caroline Arnoux, Lyons, FR;

Assignees:

UNIVERSITE CLAUDE BERNARD LYON 1, Villeurbanne, FR;

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;

ECOLE NORMALE SUPERIEURE DE LYON, Lyons, FR;

Attorney:

TraskBritt

Primary Examiner:

Stella K Yi

Int. Cl.
CPC ...
C09D 4/00 (2006.01); B29C 64/135 (2017.01); B29K 33/00 (2006.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); C08F 2/50 (2006.01); C08F 222/10 (2006.01); C09D 7/63 (2018.01); C09D 135/02 (2006.01);
U.S. Cl.
CPC ...
C09D 4/00 (2013.01); B29C 64/135 (2017.08); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); C08F 2/50 (2013.01); C08F 222/1006 (2013.01); C08F 222/103 (2020.02); C09D 7/63 (2018.01); C09D 135/02 (2013.01); B29K 2033/08 (2013.01); B29K 2033/12 (2013.01); C08F 2800/20 (2013.01);
Abstract

A polymerization initiator molecule, excitable by two photons and capable of generating polymerization-initiating free radicals, includes two branches grafted onto a central phenyl nucleus. Each branch includes an oligomer of oligophenyleneethynylenyl type or oligo-2,5-dihalogenphenyleneethynylenyl type. A photopolymerizable composition, activatable by two-photon absorption, includes a radically polymerizable resin and a photochemically effective amount of a radical photoinitiator system. The photoinitiator system includes at least one initiator molecule as described above. Moreover, a method and an associated device for two-photon three-dimensional printing are disclosed. The method includes transforming a volume of a photopolymerizable composition including at least one initiator molecule. The transformation includes irradiating the volume of composition with an irradiation light source emitting an irradiation signal having a wavelength Lof between 1 and 1.5 times, and preferably between 1.1 and 1.25 times, a cut-off wavelength Lof the initiator molecule. Embodiments may apply to submicron-resolution two-photon 3D printing.

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