Blocked isocyanate, photo-curable composition, resin, and method of manufacturing three-dimensional object
AssigneeCanon Kabushiki Kaisha
InventorSeiji Okada
Life of this patent
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Abstract
Provided is a photo-curable composition capable of creating a three-dimensional object excellent in both of: stiffness and strength; and toughness. Specifically, provided is a photo-curable composition including: a blocked isocyanate represented by the general formula (1); a chain extender; and a photo-radical generator: wherein, in the general formula (1), A1 to A4 each independently represent a structure represented by the following general formula (2), and B represents a structure represented by the following general formula (3)
Claims10
A blocked isocyanate represented by general formula (1):
- wherein, in the general formula (1), A1 to A4 each independently represent a structure represented by general formula (2), and B represents a structure represented by general formula (3):
- wherein, in the general formula (2), R1 represents a hydrogen atom or a methyl group, R2 represents a group selected from the group consisting of a tert-butyl group, a tert-pentyl group, and a tert-hexyl group, and L1 represents an ethylene group or a propylene group, and
- wherein, in the general formula (3), R3a, R3b, R4, R5, R6, and R7 each independently represent an optionally substituted divalent hydrocarbon group having 1 to 20 carbon atoms, Y1 represents a divalent linking group, and “a” represents an integer of 1 to 99.
A photo-curable composition comprising:
- a blocked isocyanate represented by general formula (1);
- a chain extender, wherein the chain extender comprises a compound having, in a molecule thereof, at least two functional groups selected from the group consisting of a hydroxyl group, an amino group, and a thiol group;
- and
- a photo-radical generator:
- wherein, in the general formula (1), A1 to A4 each independently represent a structure represented by general formula (2), and B represents a structure represented by general formula (3):
- wherein, in the general formula (2), R1 represents a hydrogen atom or a methyl group, R2 represents a group selected from the group consisting of a tert-butyl group, a tert-pentyl group, and a tert-hexyl group, and L1 represents an ethylene group or a propylene group, and
- wherein, in the general formula (3), R3a, R3b, R4, R5, R6, and R7 each independently represent an optionally substituted divalent hydrocarbon group having 1 to 20 carbon atoms, Y1 represents a divalent linking group, and “a” represents an integer of 1 to 99.
A resin comprising a repeating structural unit represented by general formula (4):
- wherein, in the general formula (4), R8, R9, R10, and R11 each independently represent a hydrogen atom or a methyl group, R12, R13, R14, and R15 each independently represent a group selected from the group consisting of a tert-butyl group, a tert-pentyl group, and a tert-hexyl group, L2, L3, L4, and L5 each independently represent an ethylene group or a propylene group, R16a, R16b, R17, R18, R19, and Rao each independently represent an optionally substituted divalent hydrocarbon group having 1 to 20 carbon atoms, Y2 represents a divalent linking group, and “b” represents an integer of 1 to 99.
A method of manufacturing a three-dimensional object comprising photo-curing a photo-curable composition comprising:
- a blocked isocyanate represented by the general formula (1);
- a chain extender;
- and a photo-radical generator layer by layer based on slice data to create a three-dimensional object:
- wherein, in the general formula (1), A1 to A4 each independently represent a structure represented by general formula (2), and B represents a structure represented by general formula (3);
- wherein, in the general formula (2), R1 represents a hydrogen atom or a methyl group, R2 represents a group selected from the group consisting of a tert-butyl group, a tert-pentyl group, and a tert-hexyl group, and L1 represents an ethylene group or a propylene group, and
- wherein, in the general formula (3), R3a, R3b, R4, R5, R6, and R7 each independently represent an optionally substituted divalent hydrocarbon group having 1 to 20 carbon atoms, Y1 represents a divalent linking group, and “a” represents an integer of 1 to 99.
Dependencies are inferred from the claim text.