Abstract: Described herein, in part, are compositions and methods for processing and curing photopolymer composition based on olefin matathesis. The photopolymer composition comprises a latent ruthenium (Ru) complex, an initiator and at least one polymer precursor. A method for preparing a cured photopolymer composition comprises exposing the photopolymer composition to electromagnetic radiation above a threshold energy to activate the initiator and exposing the photopolymer to electromagnetic radiation below said threshold energy, thereby preparing the cured photopolymer composition.

Abstract: The present disclosure relates to a method for generating a dental product or an orthodontic product. The method may comprise (a) providing a mixture comprising (i) a latent ruthenium (Ru) complex; (ii) an initiator; (iii) a sensitizer that sensitizes said initiator; and (iv) at least one polymer precursor; and (b) exposing the mixture to electromagnetic radiation to activate the initiator, wherein upon activation, the initiator reacts with the latent Ru complex to generate an activated Ru complex, which activated Ru complex reacts with the at least one polymer precursor to generate at least a portion of a final product of the dental product or the orthodontic product, wherein the at least the portion of the final product of the dental product or the orthodontic product comprises a polymer generated from the at least one polymer precursor.

Abstract: Described herein are compositions and methods for processing photopolymers based on olefin metathesis. The compositions and methods comprise latent ruthenium complexes and photoacids and/or photoacid generators.

Abstract: Described herein are compositions and methods for processing photopolymers based on olefin metathesis. The compositions and methods comprise latent ruthenium complexes and photoacids and/or photoacid generators.

Abstract: Described herein are compositions and methods for generating dental products or orthodontic products. The compositions and methods comprise latent ruthenium complexes and photoacids and/or photoacid generators.

Abstract: Described herein are compositions and methods for processing photopolymers based on olefin metathesis. The compositions and methods comprise latent ruthenium complexes and photoacids and/or photoacid generators.

Abstract: The present disclosure is directed to photosensitive compositions ‘Fischer-type’ ruthenium carbene catalysts containing chelated 2,2?-bipyridine ligands and methods of using the same. These catalysts are surprisingly active even when using relatively low intensity diode light sources. The 2,2?-bipyridine-chelated ruthenium photocatalysts show reactivity at substantially lower exposure levels than other photoactive chelating dinitrogen ligands of similar structure. The present disclosure is further directed to novel photosensitive compositions, their use as photoresists, and methods related to patterning polymer layers on substrates.

Abstract: The present disclosure is directed to photosensitive compositions ‘Fischer-type’ ruthenium carbene catalysts containing chelated 2,2?-bipyridine ligands and methods of using the same. These catalysts are surprisingly active even when using relatively low intensity diode light sources. The 2,2?-bipyridine-chelated ruthenium photocatalysts show reactivity at substantially lower exposure levels than other photoactive chelating dinitrogen ligands of similar structure. The present disclosure is further directed to novel photosensitive compositions, their use as photoresists, and methods related to patterning polymer layers on substrates.