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AssigneeNone recorded
InventorSeiji Okada
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A photo-curable composition includes a blocked isocyanate represented by the general formula (1): A-B-C (1) (wherein, in the formula (1), A and C each independently represent a group represented by the formula (2) below, and B represents a group represented by the formula (3) below: wherein, in the formula (2), R1 represents a hydrogen atom or a methyl group, R2 represents a hydrocarbon group which may have a substituent, and L1 represents a divalent hydrocarbon group; and in the formula (3), R3, R4, and R5 each independently represent a divalent hydrocarbon group which may have a substituent, 1≤a+b≤50).
A photo-curable composition comprising:
A resin comprising a repeating structural unit represented by the general formula (5):
A resin comprising:
A blocked isocyanate represented by the general formula (1):
Dependencies are inferred from the claim text.
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Of tin: tin salts of carboxylic acids
With compounds of C08G18/38: with compounds of C08G18/3819
By wave energy or particle radiation: using electromagnetic radiation
Characterised by the energy source therefor, e.g. by global irradiation combined with a mask: the energy source being concentrated, e.g. scanning…
Term end not estimated
The present invention relates to a photo-curable composition, a resin, a blocked isocyanate, and a method for manufacturing a three-dimensional object.
A stereolithographic fabrication process (stereolithography), in which a liquid photo-curable composition is cured, layer by layer, with light, such as ultraviolet light, and the cured layers are successively laminated to fabricate a desired three-dimensional object, has been thoroughly studied. The applications of stereolithography have expanded to include not only the creation of prototypes for confirming shapes (rapid prototyping), but also the creation of working models and the creation of molds for verifying functionality (rapid tooling). Furthermore, the applications of stereolithography are expanding to include the creation of actual products (rapid manufacturing).
Under such a background, requirements for photo-curable compositions used in stereolithography are enhanced, and there is a demand for photo-curable compositions capable of creating a three-dimensional object having high mechanical properties (rigidity, strength, and the like) comparable to those of general-purpose engineering plastics.
FIGURE is a view schematically illustrating a reaction scheme when a photo-curable composition according to an embodiment of the present invention is cured by irradiation with light, and is then subjected to heat treatment.
The embodiments of the present invention will be described below. It should be understood that the present invention is not limited to the embodiments described below, and embodiments obtained by, for example, appropriately changing or improving the embodiments without departing from the gist of the present invention based on the ordinary knowledge of those skilled in the art are also included in the scope of the present invention.
A photo-curable composition according to a first embodiment includes a blocked isocyanate (a), a chain extender (b), and a photo-radical generator (c).
The components included in the photo-curable composition according to this embodiment will be described in detail below.