Methods of producing polyurethane three-dimensional objects from materials having multiple mechanisms of hardening
First Claim
1. A method of forming a three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof, said method comprising:
- (a) providing a carrier and an optically transparent member having a build surface, said carrier and said build surface defining a build region therebetween;
(b) filling said build region with a polymerizable liquid, said polymerizable liquid comprising at least one of;
(i) a blocked or reactive blocked prepolymer, (ii) a blocked or reactive blocked diisocyanate, or (iii) a blocked or reactive blocked diisocyanate chain extender;
(c) irradiating said build region with light through said optically transparent member to form a solid blocked polymer scaffold and advancing said carrier away from said build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, said three-dimensional object, with said intermediate containing said chain extender;
wherein said irradiating and/or said advancing steps are carried out while also concurrently;
(i) continuously maintaining a dead zone of polymerizable liquid in contact with said build surface, and(ii) continuously maintaining a gradient of polymerization zone between said dead zone and said solid blocked polymer scaffold and in contact with each thereof, said gradient of polymerization zone comprising said first component in partially cured form; and
then(d) heating or microwave irradiating said three-dimensional intermediate sufficiently to form from said three-dimensional intermediate said three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof.
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Accused Products
Abstract
A method of forming a three-dimensional object of polyurethane, polyurea, or copolymer thereof is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable liquid including at least one of: (i) a blocked or reactive blocked prepolymer, (ii) a blocked or reactive blocked diisocyanate, or (iii) a blocked or reactive blocked diisocyanate chain extender; (c) irradiating the build region with light through the optically transparent member to form a solid blocked polymer scaffold and advancing the carrier away from the build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, the three-dimensional object, with the intermediate containing the chain extender; and then (d) heating or microwave irradiating the three-dimensional intermediate sufficiently to form from the three-dimensional intermediate the three-dimensional object of polyurethane, polyurea, or copolymer thereof.
256 Citations
29 Claims
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1. A method of forming a three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof, said method comprising:
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(a) providing a carrier and an optically transparent member having a build surface, said carrier and said build surface defining a build region therebetween; (b) filling said build region with a polymerizable liquid, said polymerizable liquid comprising at least one of;
(i) a blocked or reactive blocked prepolymer, (ii) a blocked or reactive blocked diisocyanate, or (iii) a blocked or reactive blocked diisocyanate chain extender;(c) irradiating said build region with light through said optically transparent member to form a solid blocked polymer scaffold and advancing said carrier away from said build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, said three-dimensional object, with said intermediate containing said chain extender;
wherein said irradiating and/or said advancing steps are carried out while also concurrently;(i) continuously maintaining a dead zone of polymerizable liquid in contact with said build surface, and (ii) continuously maintaining a gradient of polymerization zone between said dead zone and said solid blocked polymer scaffold and in contact with each thereof, said gradient of polymerization zone comprising said first component in partially cured form; and
then(d) heating or microwave irradiating said three-dimensional intermediate sufficiently to form from said three-dimensional intermediate said three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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7. A method of forming a three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof, said method comprising:
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(a) providing a carrier and an optically transparent member having a build surface, said carrier and said build surface defining a build region therebetween; (b) filling said build region with a polymerizable liquid; (c) irradiating said build region with light through said optically transparent member to form a solid blocked polymer scaffold and advancing said carrier away from said build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, said three-dimensional object, with said intermediate containing said chain extender; and
then(d) heating or microwave irradiating said three-dimensional intermediate sufficiently to form from said three-dimensional intermediate said three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof;
wherein;said polymerizable liquid comprising a mixture of (i) a blocked or reactive blocked prepolymer, (ii) a chain extender, (iii) a photoinitiator, (iv) optionally a polyol and/or a polyamine, and (v) optionally a reactive diluent, (vi) optionally a pigment or dye, (vii) optionally a filler; and
whereinsaid reactive blocked prepolymer is blocked by reaction of a polyisocyanate oligomer with an amine (meth)acrylate, alcohol (meth)acrylate, maleimide, or n-vinylformamide monomer blocking agent. - View Dependent Claims (27)
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11. A method of forming a three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof, said method comprising:
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(a) providing a carrier and an optically transparent member having a build surface, said carrier and said build surface defining a build region therebetween; (b) filling said build region with a polymerizable liquid; (c) irradiating said build region with light through said optically transparent member to form a solid blocked polymer scaffold and advancing said carrier away from said build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, said three-dimensional object, with said intermediate containing said chain extender; and
then(d) heating or microwave irradiating said three-dimensional intermediate sufficiently to form from said three-dimensional intermediate said three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof;
wherein;said polymerizable liquid comprising a mixture of (i) a blocked or reactive blocked diisocyanate, (ii) a polyol and/or polyamine, (iii) a chain extender, (iv) a photoinitiator, (v) optionally a reactive diluent (vi) optionally a pigment or dye, and (vii) optionally a filler; and
whereinsaid blocked or reactive blocked diisocyanate is blocked by reaction of a polyisocyanate with an alcohol (meth)acrylate, amine (meth)acrylate, maleimide, or n-vinylformamide monomer blocking agent. - View Dependent Claims (28)
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14. A method of forming a three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof, said method comprising:
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(a) providing a carrier and an optically transparent member having a build surface, said carrier and said build surface defining a build region therebetween; (b) filling said build region with a polymerizable liquid, said polymerizable liquid comprising at least one of;
(i) a blocked or reactive blocked prepolymer, (ii) a blocked or reactive blocked diisocyanate, or (iii) a blocked or reactive blocked diisocyanate chain extender;(c) irradiating said build region with light through said optically transparent member to form a solid blocked polymer scaffold and advancing said carrier away from said build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, said three-dimensional object, with said intermediate containing said chain extender; and
then(d) heating or microwave irradiating said three-dimensional intermediate sufficiently to form from said three-dimensional intermediate said three-dimensional object comprised of polyurethane, polyurea, or copolymer thereof; wherein said polymerizable liquid further comprises a mixture of (i) a polyol and/or polyamine, (ii) a blocked or reactive blocked diisocyanate chain extender, (iii) optionally one or more additional chain extenders, (iv) a photoinitiator, (v) optionally a reactive diluent (vi) optionally a pigment or dye, and (vii) optionally a filler. - View Dependent Claims (15, 16, 17, 29)
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Specification