Photopolymerisable composition, material obtained by polymerising such a composition and 3D printing method using such a composition

A method for photopolymerizing a photopolymerizable composition comprising:

• a polymerizable resin,
• a photosensitizer (PS),
• an annihilator (AN), and
• a photoinitiator (PI),
• the method comprising:
• the photosensitizer absorbing a light signal received in a first range of wavelengths, and transferring energy received from the light signal to the annihilator,
• excited by the energy received from the photosensitizer, the annihilator emitting a light signal in a second range of wavelengths different from the first range of wavelengths, a photon energy of the light signal emitted by the annihilator being greater than a photon energy of the light signal received by the photosensitizer,
• the annihilator transferring energy to the photoinitiator in order to excite the photoinitiator (PI) for polymerization of the resin,
• the photoinitiator, excited by the annihilator, generating at least one polymerization initiator, and
• the polymerization initiator causing a polymerization reaction of the resin.

A material obtained by a method of photopolymerizing a photopolymerizable composition, the photopolymerizable composition comprising a polymerizable resin, a photosensitizer (PS), an annihilator (AN), and a photoinitiator (PI), the method of photopolymerizing comprising:

• the photosensitizer absorbing a light signal received in a first range of wavelengths, and transferring energy received from the light signal to the annihilator,
• excited by the energy received from the photosensitizer, the annihilator emitting a light signal in a second range of wavelengths different from the first range of wavelengths, a photon energy of the light signal emitted by the annihilator being greater than a photon energy of the light signal received by the photosensitizer,
• the annihilator transferring energy to the photoinitiator in order to excite the photoinitiator (PI) for polymerization of the resin,
• the photoinitiator, excited by the annihilator, generating at least one polymerization initiator, and
• the polymerization initiator causing a polymerization reaction of the resin.