Embodiments in accordance with the present invention encompass compositions containing a latent organo-ruthenium carbide catalyst, a photoactive acid generator or a thermally active acid generator and a photoactive compound along with one or more monomers which undergo ring open metathesis polymerization (ROMP) when said composition is exposed to a suitable radiation (or heat) to form a three-dimensional (3D) object. The three-dimensional objects made by this process exhibits improved mechanical properties, particularly, high distortion temperature, impact strength, elongation to break, among others. Accordingly, compositions of this invention are useful as 3D inkjet materials for forming high impact strength objects of various sizes with microscale features lower than 100 microns, among various other uses.

Dicyclopentadiene (DCPD) derivatives of following general formula (I); their preparation and use thereof, especially as monomers in polymerization reactions, such as olefin polymerization or ring-opening metathesis polymerization (ROMP). ##STR00001##

Dicyclopentadiene (DCPD) derivatives of following general formula (I); their preparation and use thereof, especially as monomers in polymerization reactions, such as olefin polymerization or ring-opening metathesis polymerization (ROMP). ##STR00001##

Embodiments in accordance with the present invention encompass compositions encompassing a latent organo-ruthenium compound and a pyridine compound along with one or more monomers which undergo ring open metathesis polymerization (ROMP) when said composition is exposed to suitable actinic radiation to form a substantially transparent film. Surprisingly, the compositions are very stable at ambient conditions to temperatures up to 80 C. for several days and undergo mass polymerization when subject only to actinic radiation. Accordingly, compositions of this invention are useful in various opto-electronic applications, including as 3D printing materials, coatings, encapsulants, fillers, leveling agents, among others.

The present specification provides a compound, a photoresist composition comprising the same, a photoresist pattern comprising the same, and a method for preparing a photoresist pattern.

The present specification provides a compound, a photoresist composition comprising the same, a photoresist pattern comprising the same, and a method for preparing a photoresist pattern.

To provide a novel production method for a hydrogenated petroleum resin that does not cause filter clogging and is also capable of suppressing a significant decrease in catalytic activity in hydrogenation in a production method for a dicyclopentadiene/vinyl aromatic compound-based hydrogenated resin to be used as a tackifier. A production method for a dicyclopentadiene/vinyl aromatic compound-based hydrogenated petroleum resin, in which a reaction product obtained by reacting a dicyclopentadiene with a vinyl aromatic compound is subjected to thermal polymerization, thereby obtaining a thermal polymerization reaction product, followed by hydrogenation thereof, characterized in that as the thermal polymerization reaction product, an oligomer-removed thermal polymerization reaction product obtained by removing a dicyclopentadiene oligomer from the thermal polymerization reaction product is used as a hydrogenation raw material.

To provide a novel production method for a hydrogenated petroleum resin that does not cause filter clogging and is also capable of suppressing a significant decrease in catalytic activity in hydrogenation in a production method for a dicyclopentadiene/vinyl aromatic compound-based hydrogenated resin to be used as a tackifier. A production method for a dicyclopentadiene/vinyl aromatic compound-based hydrogenated petroleum resin, in which a reaction product obtained by reacting a dicyclopentadiene with a vinyl aromatic compound is subjected to thermal polymerization, thereby obtaining a thermal polymerization reaction product, followed by hydrogenation thereof, characterized in that as the thermal polymerization reaction product, an oligomer-removed thermal polymerization reaction product obtained by removing a dicyclopentadiene oligomer from the thermal polymerization reaction product is used as a hydrogenation raw material.

To provide a novel production method for a hydrogenated petroleum resin that does not cause filter clogging and is also capable of suppressing a significant decrease in catalytic activity in hydrogenation in a production method for a dicyclopentadiene/vinyl aromatic compound-based hydrogenated resin to be used as a tackifier. A production method for a dicyclopentadiene/vinyl aromatic compound-based hydrogenated petroleum resin, in which a reaction product obtained by reacting a dicyclopentadiene with a vinyl aromatic compound is subjected to thermal polymerization, thereby obtaining a thermal polymerization reaction product, followed by hydrogenation thereof, characterized in that as the thermal polymerization reaction product, an oligomer-removed thermal polymerization reaction product obtained by removing a dicyclopentadiene oligomer from the thermal polymerization reaction product is used as a hydrogenation raw material.

Embodiments in accordance with the present invention encompass compositions encompassing a procatalyst, a photoacid generator, a photosensitizer and one or more monomers which undergo vinyl addition polymerization when said composition is exposed to suitable UV irradiation and heated to a temperature from 50 C. to 100 C. to form a substantially transparent film. The monomers employed therein have a range of refractive index from 1.4 to 1.6 and thus these compositions can be tailored to form transparent films of varied refractive indices. Accordingly, compositions of this invention are useful in various opto-electronic applications, including as coatings, encapsulants, fillers, leveling agents, among others.