| 主权项 |
1. A method for fabricating a three-dimensional object comprising:
depositing a first amount of an ultraviolet curable phase change ink composition comprising an optional colorant and a phase change ink vehicle comprising a radiation curable monomer or prepolymer; a photoinitiator; a reactive wax; and a gellant upon a print region surface; successively depositing additional amounts of the ultraviolet curable phase change ink composition to create a three-dimensional object; and curing the ultraviolet curable phase change ink composition; wherein multiple layers of the curable ink object are cured upon completion of deposition of a last of the multiple layers of the object; wherein the gellant is a compound of the formulawherein R˜ is (i) an alkylene group, including linear and branched, saturated and unsaturated, cyclic and acyclic, and substituted and unsubstituted alkylene groups, and wherein heteroatoms either may or may not be present in the alkylene group, (ii) an arylene group, including substituted and unsubstituted arylene groups, and wherein heteroatoms either may or may not be present in the arylene group, (iii) an arylalkylene group, including substituted and unsubstituted arylalkylene groups, wherein the alkyl portion of the arylalkylene group can be linear or branched, saturated or unsaturated, and cyclic or acyclic, and wherein heteroatoms either may or may not be present in either the aryl or the alkyl portion of the arylalkylene group, or (iv) an alkylarylene group, including substituted and unsubstituted alkylarylene groups, wherein the alkyl portion of the alkylarylene group can be linear or branched, saturated or unsaturated, and cyclic or acyclic, and wherein heteroatoms either may or may not be present in either the aryl or the alkyl portion of the alkylarylene group, R2 and R2′ each, independently of the other, are (i) alkylene groups, including linear and branched, saturated and unsaturated, cyclic and acyclic, and substituted and unsubstituted alkylene groups, and wherein heteroatoms either may or may not be present in the alkylene group, (ii) arylene groups, including substituted and unsubstituted arylene groups, and wherein heteroatoms either may or may not be present in the arylene group, (iii) arylalkylene groups, including substituted and unsubstituted arylalkylene groups, wherein the alkyl portion of the arylalkylene group can be linear or branched, saturated or unsaturated, and cyclic or acyclic, and wherein heteroatoms either may or may not be present in either the aryl or the alkyl portion of the arylalkylene group, or (iv) alkylarylene groups, including substituted and unsubstituted alkylarylene groups, wherein the alkyl portion of the alkylarylene group can be linear or branched, saturated or unsaturated, and cyclic or acyclic, and wherein heteroatoms either may or may not be present in either the aryl or the alkyl portion of the alkylarylene group, R3 and R3′ each, independently of the other, are either (a) photoinitiating groups, or (b) groups which are (i) alkyl groups, including linear and branched, saturated and unsaturated, cyclic and acyclic, and substituted and unsubstituted alkyl groups, and wherein heteroatoms either may or may not be present in the alkyl group, (ii) aryl groups, including substituted and unsubstituted aryl groups, wherein heteroatoms either may or may not be present in the aryl group, (iii) arylalkyl groups, including substituted and unsubstituted arylalkyl groups, wherein the alkyl portion of the arylalkyl group can be linear or branched, saturated or unsaturated, and cyclic or acyclic, and wherein heteroatoms either may or may not be present in either the aryl or the alkyl portion of the arylalkyl group, or (iv) alkylaryl groups, including substituted and unsubstituted alkylaryl groups, wherein the alkyl portion of the alkylaryl group can be linear or branched, saturated or unsaturated, and cyclic or acyclic, and wherein heteroatoms either may ormay not be present in either the aryl or the alkyl portion of the alkylaryl group, and X and X′ each, independently of the other, is an oxygen atom or a group of the formula —NR4-, wherein R4 is (i) a hydrogen atom, (ii) an alkyl group, including linear and branched, saturated and unsaturated, cyclic and acyclic, and substituted and unsubstituted alkyl groups, and wherein heteroatoms either may or may not be present in the alkyl group, (iii) an aryl group, including substituted and unsubstituted aryl groups, and wherein heteroatoms either may or may not be present in the aryl group, (iv) an arylalkyl group, including substituted and unsubstituted arylalkyl groups, wherein the alkyl portion of the arylalkyl group can be linear or branched, saturated or unsaturated, and cyclic or acyclic, and wherein heteroatoms either may or may not be present in either the aryl or the alkyl portion of the arylalkyl group, or (v) an alkylaryl group, including substituted and unsubstituted alkylaryl groups, wherein the alkyl portion of the alkylaryl group can be linear or branched, saturated or unsaturated, and cyclic or acyclic, and wherein heteroatoms either may or may not be present in either the aryl or the alkyl portion of the alkylaryl group. |
